Tag: santos

  • Koran Tempo – Jangan Hambat Kasus Lapindo

    Polisi kukuh menyimpulkan bahwa semburan lumpur di Sidoarjo disebabkan oleh kelalaian dalam pengeboran. Pernyataan ini pernah disampaikan ke DPR oleh Kepala Badan Reserse dan Kriminal Komisaris Jenderal Bambang Hendarso Danuri, yang kini menjabat Kepala Kepolisian RI. Tapi, menurut Bambang, jaksa meminta tambahan saksi ahli yang menyatakan semburan itu sebagai bencana alam.

    Itulah yang membuat berkas kasus lumpur Lapindo terombang-ambing. Polisi dan jaksa memiliki pandangan berbeda. Masalahnya, kompromi bukan pilihan terbaik karena hasilnya justru akan mengendurkan jerat hukum yang telah dipasang polisi.

    Kengototan jaksa sungguh aneh karena para ahli geologi dunia pun cenderung menyatakan semburan lumpur dipicu oleh pengeboran. Inilah pandangan yang dominan dalam konferensi American Association of Petroleum Geologists di Cape Town, Afrika Selatan, baru-baru ini. Hanya sedikit ahli yang sepakat bahwa semburan itu merupakan dampak gempa di Yogyakarta.

    Pengeboran yang dilakukan Lapindo berbahaya karena tidak menggunakan casing secara penuh. Badan Pemeriksa Keuangan, yang pernah mengaudit kasus ini, juga mendapat keterangan penting dari Dinas Survei dan Pengeboran BP Migas. Intinya, proses pencabutan pipa dan mata bor dari kedalaman 7.415 kaki, sehari sebelum semburan terjadi pada 29 Mei 2006, menyebabkan “well kick” terlambat diantisipasi. Peralatan pengeboran pun sering rusak. Menurut auditor BPK, kontraktor yang ditunjuk Lapindo diduga menggunakan beberapa peralatan bekas atau tidak memenuhi standar kualitas.

    Jaksa mestinya berpegang pada fakta seperti itu. Mengarahkan kasus lumpur Lapindo ke perdebatan apakah semburan itu berkaitan dengan gempa atau tidak hanya akan mengaburkan persoalan. Sepanjang ditemukan bukti yang cukup adanya kelalaian dalam pengeboran, kasus ini layak dibawa ke pengadilan.

    Persoalan ini tak akan berlarut-larut andaikata Presiden Susilo Bambang Yudhoyono segera turun tangan. Perbedaan pendapat antara jaksa dan polisi seharusnya bisa diatasi karena kedua institusi ini di bawah kendali langsung Presiden. Jangan sampai khalayak menilai pemerintah sengaja membiarkan kasus ini menjadi terkesan rumit, sehingga akhirnya tak jelas siapa yang mesti bertanggung jawab atas penderitaan warga Sidoarjo.[Editorial Koran Tempo, 31/10]

  • AAPG Day 2: showdown at the Lusi corral

    Things were a bit different from the other sessions at this conference: photographers and cameramen were roaming the room, and on my way in I had a press release from Lapindo Brantas thrust into my hands, informing me that most of the previously reported findings were based on ‘incorrect data’, and that this would be the first time ‘official data’ were presented to the scientific community. It transpired that this was also stretching the truth a bit; as the session unfolded it became apparent that this was more an issue of which data (specifically, which of the various measurements and estimates of borehole pressure) should be used, and how to interpret them. Contrary to their own press office, then, Lapindo Brantas – to their credit – seem to have been quite open about sharing their records with any interested party, even if they might disagree with how it is then used.

    The debate consisted of two talks from the pro-earthquake camp, followed by questions, then two talks from the pro-drilling camp, followed by more questions and a general discussion, ending with a poll of the audience. Below I’m summarising from notes I took during the session; as such, there may be some unintentional inaccuracies.

    First up was Adriano Mazzini, who reviewed his arguments that the eruption was the result of the Yogyakarta earthquake reactivating a pre-existing fault that runs through the area. Main points:

    • There is clear evidence of displacement along this fault after the eruption, and other small mud eruptions also occurred along its trace at the time Lusi erupted. This does indeed signal that this fault acted as a conduit for upwelling fluids.
    • However, the question of what triggered this trigger – the ultimate cause of the fault suddenly becoming an open pathway for mud – is still open. The timing of the fault reactivation is not known, so it could just as easily have been the result of stresses induced by a nearby well blow-out as by an earthquake. In support of the latter, pressure losses in well at the time of the earthquake might indicate that there were measurable stresses being induced in the subsurface, more than is assumed by the pro-drilling camp.
    • Lusi’s eruption has been abnormally lengthy; natural mud volcano eruptions tend to last a few days (and in this respect it seems that Lusi also differs from the other eruptions in the area he talked about, which were further from the borehole). It might be something to do with this being an entirely new system, but it could just as easily be a sign of unnatural influences on the triggering of the eruption.
    • This area of Indonesia is “ideal”, both in terms of prevailing tectonic, structural and lithological conditions, for the formation of mud volcanoes, and the existence of a highly suitable ‘piercement structure’ (the fault) in the area meant that an eruption was only a matter of time. This last point would become important in the later discussion.

    The next speaker, from Lapindo Brantas, was the person who oversaw the borehole, which mades his slightly defensive tone entirely understandable. The talk aimed to use data from the borehole to demonstrate that a blow-out had not occurred.

    • The most important claim was that there was no evidence of the well being connected to Lusi’s plumbing, which you would expect if a well blow-out was the trigger. For example, following the eruption of Lusi they performed an “injection test”, where drilling mud was pumped into the borehole. As they did this, the pressure in the well slowly built up, which can only happen if the well is sealed; if there was a breach in the well, the fluid would escape.
    • The pressure losses at around the time of the earthquake talk prompted the decision to case the unsealed part of the borehole before drilling deeper. As they were puling out the drill string to do so on the 28th May, there was a ‘kick’ in the hole – an increase in pressure due to fluid entering from the surrounding rock. The pressure increase from this kick, and whether it was enough to trigger a blow-out, is one of the major sticking points of this whole argument.
    • The pro-drilling people have published calculations that indicated that it was more than high enough to trigger a blow-out. It was claimed here that these calculations were performed incorrectly, and should give much lower (and safe) pressures. I can’t claim enough expertise to tell if these criticisms were valid or not.
    • Either way, borehole records after the kick are inconsistent with it being the result of a well blow-out.

    The first speaker from the pro-drilling camp, Mark Tingay, gave a very nice presentation which actually addressed the pros and cons of both theories, although he was clear which he favoured.

    • Earthquake reactivation of the fault seems unlikely from the calculated differential shear stresses it induced in the area around Lusi (for more details you can read Maria’s post on this, since she was involved in this study). He had a nice plot to illustrate this point, which I reproduce schematically here.

      lusidebatefig.png

      Basically, the earthquakes which are known to have triggered mud volcanism (green dots) were either larger and/or closer to the induced eruptions than Lusi was to the Yogyakarta earthquake (big red dot), and other seismicity in the area prior to the eruption (orange dots) appears to have induced similar, or in some cases greater, differential stresses. There is of course a lot of uncertainty about how strong the fault was (how large a differential stress you need to cause it to fail), but the point is that there was nothing special about the May 27th earthquake in terms of the force it exerted in the area.

    • The apparent disconnection of the well from Lusi could be due to the lower part being sealed off due to it being blocked by rock fragments from the blow-out (which is apparently quite common), or shearing.
    • The evidence following the kick is “unclear”, but the stresses that it induced were an order of magnitude larger than those due to the earthquake
    • This was a problematic hole, with lots of pressure losses and kicks, and the ‘drilling window’ – the range of pressures where the drilling mud will safely just sit there – was very narrow. This was a result of the well design being based on holes drilled through this sequence quite a distance away, where the underlying carbonates were not overpressured. However, in another well very close by, the carbonates were under extremely high pressure, and they almost lost that well to a blow-out when they hit them. By not taking this into account, it would have been nearly impossible to stop a blow-out following the kick.
    • There is a series of linear surface fractures leading between the well and the Lusi vent, which have not erupted any mud but are an indication of sub-surface fracturing.

    The final presentation was by Richard Davies, the person whose paper implicating the drilling kicked off my interest in this subject.

    • This talk was a review of the events in the well leading up to the Lusi eruption. It was a very good summary, but most of the points have been covered in my accounts of the previous speakers.
    • However, in the middle of the talk, proving that for every expert there is an equal and opposite expert, another (non Lapindo Brantas) drilling engineer came up to the stage to show us how all the well pressure data was consistent with the initial kick being due to a blow-out (I think that the main argument was that you had pressure losses after the hole was sealed).

    The discussion following the talks emphasised a couple of other points of disagreement, such as the shaking intensity in the Lusi region from the May 27th earthquake: the pro-drillers say I-II, pro-quakers claim IV. Mazzini also argues that the eruption is entirely sourced within the mudstones with the water produced by clay minerals reacting to form illite and water, whereas Davies et al. say that the water is mainly from the underlying carbonates. It is a lot of water, although I guess it would be hard to claim the earthquake would cause the carbonates to breach.

    However, more interesting was that several people picked up on the suggestion that this was clearly a prime area for mud volcano formation, and wondered quite loudly why the hell any drilling was being done there in the first place. To sum up the mood, one questioner complimented the second speaker for standing up there to defend the drilling, when it really should be the geologists who told him to drill there in the first place. It’s a good point; perhaps the focus should be less on the drilling practice on this specific well, because whatever your procedures and safety precautions, accidents can and do happen, and more on well siting decisions in general, particularly decisions to drill in “primed” areas like this one, where the margin for error is rather slim.

    This attitude might explain why in the closing straw poll, more than 50% of the audience was willing to blame the whole mess on the drilling. Only a tiny fraction thought that the earthquake was solely to blame, with roughly equal numbers of the remaining half either thinking it could have been both, or finding it inconclusive either way. In conclusion, it was a very interesting session, and was conducted in a very fair-minded and respectful manner given the contentious nature of the debate.

    Sumber: http://scienceblogs.com/highlyallochthonous/2008/10/aapg_day_2_showdown_at_the_lus.php?

  • Tidak Mungkin, Gempa Yogya —> bikin mud volcano di Porong ?

     

    Saya tertarik dengan argumen pribadi Dr. Awang Harun (dari BP Migas)
    dan Dr. Andang Bachtiar (ex ketua IAGI), secara terpisah, yang ” sepakat
    ” (koreksi :Pak ADB justru lebih yakin dipicu pengeboran, koreksi rdp)
    merujuk gempa Yogya sebagai pemicu semburan lumpur di Porong.
    Disebutkan ada 5 titik semburan, terbentuk pada 29 Mei 1 Juni, dan jika
    dihubungkan dengan garis akan embentuk arah barat daya – timur laut.
    Orientasi ini earah dengan sesar regional di wilayah ini, dan kalo mau
    ditarik lagi lebih jauh juga searah dengan sesar Opak yang jadi
    penyebab gempa Yogya. Jika orientasi
    barat daya – timur laut ini diperpanjang, akan nampak aris imajiner
    yang menghubungkan sesar Opak – Sangiran Dome – Porong. Sehingga
    semburan ini ihipotesiskan sebagai likuifaksi, gejala biasa dalam uatu
    gempa, seperti yang ditemukan juga di Jetis Bantul) dan Prambanan
    (Klaten) dalam bentuk semburan air berlumpur ” (menurut versi penduduk,
    seperti ikutip media lokal Kedaulatan Rakyat dan Wawasan). Gempa Yogya
    di sebut2 mereaktivasi sesar lokal di Porong, sehingga menghasilkan
    semburan lumpur, dan ini adalah murni musibah.

    ***

    Terkait itu, ada beberapa pertanyaan pak Rovicky :

    1. Apakah likuifaksi bisa terjadi di tempat yang jaraknya > 200 km dari sumber gempa ?

    Sebab, dalam pendapat saya, intensitas di lokasi tersebut sudah
    kecil. Jika saya mencoba menghitung dengan menggunakan persamaan
    atenuasi intensitas ln I ln Io = k.x dengan koefisien atenuasi (k) =
    -0,00387 (berdasarkan titik acuan kota Yogya dan Semarang) erta
    intensitas hiposenter (Io) = 8,7 (untuk Mw = 6,3) pada jarak (x) = 200
    km intensitasnya 4 MMI dengan percepatan maksimal 2,3 % G), sementara
    pada jarak (x) = 250 km intensitasnya menurun sedikit menjadi 3 MMI
    (dengan percepatan maksimal 1,4 % G).
    Catatan intensitas dari stasiun BMG Surabaya dan Karangkates (Malang)
    menunjukkan angka 2 – 3 MMI untuk Surabaya (jarak +/ – 250 km dari
    hiposenter) dan 3 – 4 MMI untuk Malang (jarak + / – 230 km dari
    hiposenter), artinya tidak berbeda jauh dengan perhitungan.
    Fokuskan ke sekitar Surabaya. Dengan intensitas 3 MMI itu, dimana
    getarannya setara dengan getaran akibat melintasnya sebuah truk besar
    bila kita berdiri di tepi jalan raya, apakah bisa gempa Yogya tadi
    menghasilkan likuifaksi disini ? Bila kita merujuk ada kasus gempa Loma
    Prieta 1989 (Mw = 6,9) di California, radius terjauh likuifaksi terjadi
    adalah sebesar 110 km dari episenter gempa. Kita logikakan saja, dengan
    Mw gempa Yogya lebih kecil (6,3) bukankah ” seharusnya ” radius terjauh
    likuifaksi < 110 km ?

    (catatan : dalam perhitungan saya, jika dianggap koefisien atenuasi
    gempa Loma Prieta sama dengan gempa Yogya, dengan kedalaman hiposentrum
    17 km, pada jarak 110 km dari episentrum, intensitasnya sebesar 6 MMI
    dengan percepatan puncak 12,3 % G, jauh lebih besar dari intensitas di
    Porong).

    2. Apakah gempa Yogya bisa mereaktivasi sesar lokal di Porong ?

    Di sisi timur sesar Opak telah dideteksi ada 74 buah sesar minor
    dengan panjang bervariasi antara 1 km hingga 4 km, yang tersebar di
    wilayah Gunungkidul – Klaten. Sesar minor terjauh ada di wilayah
    kecamatan Bayat (Klaten). Sesar2 minor ini dipastikan merupakan sumber2
    afershocks gempa Yogya. Kalo saya menghitung dengan persamaan
    empirisnya Ambrosey dan Zatopak (1968, saya kutip dari artikelnya Dr.
    George Pararas Carayannis) mengenai hubungan antara panjang sesar (L)
    dan magnitude gempa (M) : log L = 1,13 M + K, dimana untuk gempa Yogya
    K = – 5,34 (dengan Mw = 6,3 dan L = 60 km), maka jika sesar minor
    memiliki panjang (L) 1 – 4 km, gempanya memiliki magnitude (Mw) 4,7 –
    5,3.

    Masalahnya sekarang, jika gempa Yogya memang mampu mereaktivasi
    sesar lokal di Porong, tidak bisa tidak sesar lokal itu harus bergeser
    bukan, meski nilai pergeserannya mungkin sangat kecil hingga tidak
    menimbulkan retakan di permukaan tanah. Mari kita berandai-andai,
    anggaplah pergeseran tersebut meliputi segmen sepanjang 1 km dalam
    sesar lokal itu, maka ” seharusnya ” sudah diiringi gempa dengan Mw =
    4,7.
    Jika segmen yang bergeser hanya 200 m, gempa yang terjadi memiliki Mw =
    4,1. Bukankah moment magnitude (Mw) sebesar ini masih bisa dideteksi
    dengan mudah oleh seismograf2nya BMG dan USGS. Apalagi USGS memberi
    batasan hanya gempa2 dengan Mw > 3,5 saja yang akan
    didokumentasikan. Sementara, sejauh yang saya tahu, stasiun2 BMG di
    Surabaya dan Karangkates hanya melaporkan adanya guncangan akibat gempa
    Yogya saja, namun tidak menyebutkan adanya gempa lain atau aftershocks
    dengan episentrum di sekitar Porong.

    3. Apakah energi gempa Yogya dirambatkan oleh sesar2 hingga sampai ke Porong ?

    Sesar Besar Jawa Tengah Van BammelenIni
    masih terkait dengan pertanyaan no. 2. Mengikuti pendapat pak Awang dan
    pak Andang, saya mencoba menarik garis imajiner terusan sesar Opak ke
    arah timur laut. Saya juga mencoba menarik garis imajiner yang
    menghubungkan sumur Banjar Panji 1 – Purwodadi – Mojokerto – Sangiran,
    titik2 dimana terdapat mud volcano atau sumber air asin. Hasilnya bisa
    dilihat pada gambar ” situasi bp1 sangiran.jpg “.
    Menarik sekali bahwa garis imajiner yang menghubungkan Banjar Panji 1 –
    Purwodadi – Mojokerto – Sangiran ternyata menyusuri sisi selatan
    Pegunungan Kendeng, dimana menurut van Bemmelen disini terdapat ” sesar
    Simo ” yang longitudinal terhadap pulau Jawa.
    Sementara garis perpanjangan sesar Opak, justru melintas amat jauh
    terhadap Porong. Perpanjangan sesar Opak justru melintasi sesar
    pembatas Bawean High – Tuban Graben di Laut Jawa. Menarik juga, bahwa
    lintasan perpanjangan sesar Opak di Pegunungan Kendeng dan geosinklin
    Jawa utara ditandai dengan banyaknya sesar2 lokal yang orientasinya
    sebagian besar paralel dengan sesar Opak.
    Dalam pendapat saya, koq tidak ada ya hubungan segaris antara mud volcano di Porong dengan sesar Opak.
    Terkecuali jika dikatakan sesar Opak yang berarah barat daya – timur
    laut ini bersambung dengan ” sesar Simo ” yang berarah barat – timur,
    dimana titik persambungannya ada di sekitar Sangiran. Namun, logikanya,
    jika hal seperti itu yang terjadi, seharusnya terdeteksi juga
    aftershock di sepanjang ” sesar Simo ” bukan ? Karena energi gempa
    Yogya “seharusnya ” merambat di sini.
    Apalagi menurut van Bemmelen, sesar Opak adalah bagian dari sesar
    transversal yang membelah Jawa dari selatan ke utara. Sesar transversal
    ini (saya mengistilahkannya dengan ” sesar besar Jawa Tengah “) menjadi
    tempat berdirinya gunung2 api Merapi, Merbabu, Telomoyo, Ungaran hingga
    berakhir pada sesar Glagah di utara. Memang sesar besar ini juga
    berpotongan dengan perpanjangan ” sesar Simo “, namun titik potongnya
    jauh di utara dari sesar Opak, di tempat yang sekarang menjadi kerucut
    Gunung Merapi. Sesar Opak justru berpotongan dengan sesar longitudinal
    dari sisi utara Pegunungan Selatan (Pegunungan Sewu) di sekitar
    Prambanan, dan dari sini saya bisa memahami mengapa sesar2 minor produk
    gempa Yogya kebanyakan ada di Gunungkidul utara dan Klaten dengan
    sebagian besar berarah arah barat laut – tenggara, sehingga salah satu
    daerah yang kerusakannya sangat parah (selain Parangtritis – Prambanan)
    adalah Kecamatan Gantiwarno – Wedi – Bayat (sebelah tenggara
    Prambanan). Gambaran tentang sesar besar Jawa Tengah ini bisa dilihat
    di ” sesar besar jawa tengah.jpg “.

    BPJ-1 to Sangiran4.
    Jika gempa Yogya menyebabkan mud volcano di Porong, mengapa gempa yang
    sama juga tidak menyebabkan peningkatan aktivitas mud volcano Bledug
    Kuwu atau membangkitkan kembali aktivitas Sangiran Dome ?

    Apalagi dua tempat terakhir itu lebih dekat terhadap pusat gempa
    dibanding Porong. Dan sejauh ini tidak ada peningkatan jumlah lumpur di
    Kuwu ataupun bangkitnya kembali Sangiran Dome. Peningkatan aktivitas
    hanya ada di Gunung Merapi dan ini bisa dipahami mengingat dari
    Prambanan ke arah utara ada sesar yang langsung menuju ke Merapi.
    Sehingga rambatan energi gempa Yogya, setelah melintasi sesar Opak,
    sangat mungkin berbelok menyusur sesar tadi,sehingga dapur magma Merapi
    menerima tambahan energi.

    ***

    Saya merasa, mengaitkan gempa Yogya dengan mud volcano di Porong
    jauh panggang dari api. Gempa memang punya kemampuan likuifaksi, tapi
    jangkauannya juga terbatas. Apalagi, merujuk hasil penelitian BMG
    seperti dipaparkan Tiar Prasetya, gelombang primer dalam gempa Yogya
    tidak merambat homogen ke segala arah, tetapi terkutubkan
    (terpolarisasi) hingga seakan-akan membentuk pola bunga melati.
    Pengutuban ini menjadi faktor penjelas mengapa kerusakan parah – selain
    di sepanjang jalur sesar Opak – hanya dialami sebagian kota Yogya ,
    tepatnya mulai dari kompleks kampus IAIN dan Tamansiswa ke arah timur.
    Bagian barat kota Yogya, demikian juga dengan kecamatan Gamping, Sedayu
    dan Sentolo, relatif mengalami kerusakan ringan.

    Jalur kerusakan berat ke barat menghampiri Srandakan – Purworejo dan ke timur melintasi Pacitan. Kalo sumbu
    polarisasi ke timur ini diteruskan, posisinya juga jauh dari Porong, pak Rovicky.

    Demikian pendapat dan pertanyaan saya pak Rovicky. Matur nuwun atas pencerahannya.

    Wassalamu’alaykum

    Ma’rufin

     

  • Tidak Mungkin, Gempa Yogya —> bikin mud volcano di Porong ?

     

    Saya tertarik dengan argumen pribadi Dr. Awang Harun (dari BP Migas)
    dan Dr. Andang Bachtiar (ex ketua IAGI), secara terpisah, yang ” sepakat
    ” (koreksi :Pak ADB justru lebih yakin dipicu pengeboran, koreksi rdp)
    merujuk gempa Yogya sebagai pemicu semburan lumpur di Porong.
    Disebutkan ada 5 titik semburan, terbentuk pada 29 Mei 1 Juni, dan jika
    dihubungkan dengan garis akan embentuk arah barat daya – timur laut.
    Orientasi ini earah dengan sesar regional di wilayah ini, dan kalo mau
    ditarik lagi lebih jauh juga searah dengan sesar Opak yang jadi
    penyebab gempa Yogya. Jika orientasi
    barat daya – timur laut ini diperpanjang, akan nampak aris imajiner
    yang menghubungkan sesar Opak – Sangiran Dome – Porong. Sehingga
    semburan ini ihipotesiskan sebagai likuifaksi, gejala biasa dalam uatu
    gempa, seperti yang ditemukan juga di Jetis Bantul) dan Prambanan
    (Klaten) dalam bentuk semburan air berlumpur ” (menurut versi penduduk,
    seperti ikutip media lokal Kedaulatan Rakyat dan Wawasan). Gempa Yogya
    di sebut2 mereaktivasi sesar lokal di Porong, sehingga menghasilkan
    semburan lumpur, dan ini adalah murni musibah.

    ***

    Terkait itu, ada beberapa pertanyaan pak Rovicky :

    1. Apakah likuifaksi bisa terjadi di tempat yang jaraknya > 200 km dari sumber gempa ?

    Sebab, dalam pendapat saya, intensitas di lokasi tersebut sudah
    kecil. Jika saya mencoba menghitung dengan menggunakan persamaan
    atenuasi intensitas ln I ln Io = k.x dengan koefisien atenuasi (k) =
    -0,00387 (berdasarkan titik acuan kota Yogya dan Semarang) erta
    intensitas hiposenter (Io) = 8,7 (untuk Mw = 6,3) pada jarak (x) = 200
    km intensitasnya 4 MMI dengan percepatan maksimal 2,3 % G), sementara
    pada jarak (x) = 250 km intensitasnya menurun sedikit menjadi 3 MMI
    (dengan percepatan maksimal 1,4 % G).
    Catatan intensitas dari stasiun BMG Surabaya dan Karangkates (Malang)
    menunjukkan angka 2 – 3 MMI untuk Surabaya (jarak +/ – 250 km dari
    hiposenter) dan 3 – 4 MMI untuk Malang (jarak + / – 230 km dari
    hiposenter), artinya tidak berbeda jauh dengan perhitungan.
    Fokuskan ke sekitar Surabaya. Dengan intensitas 3 MMI itu, dimana
    getarannya setara dengan getaran akibat melintasnya sebuah truk besar
    bila kita berdiri di tepi jalan raya, apakah bisa gempa Yogya tadi
    menghasilkan likuifaksi disini ? Bila kita merujuk ada kasus gempa Loma
    Prieta 1989 (Mw = 6,9) di California, radius terjauh likuifaksi terjadi
    adalah sebesar 110 km dari episenter gempa. Kita logikakan saja, dengan
    Mw gempa Yogya lebih kecil (6,3) bukankah ” seharusnya ” radius terjauh
    likuifaksi < 110 km ?

    (catatan : dalam perhitungan saya, jika dianggap koefisien atenuasi
    gempa Loma Prieta sama dengan gempa Yogya, dengan kedalaman hiposentrum
    17 km, pada jarak 110 km dari episentrum, intensitasnya sebesar 6 MMI
    dengan percepatan puncak 12,3 % G, jauh lebih besar dari intensitas di
    Porong).

    2. Apakah gempa Yogya bisa mereaktivasi sesar lokal di Porong ?

    Di sisi timur sesar Opak telah dideteksi ada 74 buah sesar minor
    dengan panjang bervariasi antara 1 km hingga 4 km, yang tersebar di
    wilayah Gunungkidul – Klaten. Sesar minor terjauh ada di wilayah
    kecamatan Bayat (Klaten). Sesar2 minor ini dipastikan merupakan sumber2
    afershocks gempa Yogya. Kalo saya menghitung dengan persamaan
    empirisnya Ambrosey dan Zatopak (1968, saya kutip dari artikelnya Dr.
    George Pararas Carayannis) mengenai hubungan antara panjang sesar (L)
    dan magnitude gempa (M) : log L = 1,13 M + K, dimana untuk gempa Yogya
    K = – 5,34 (dengan Mw = 6,3 dan L = 60 km), maka jika sesar minor
    memiliki panjang (L) 1 – 4 km, gempanya memiliki magnitude (Mw) 4,7 –
    5,3.

    Masalahnya sekarang, jika gempa Yogya memang mampu mereaktivasi
    sesar lokal di Porong, tidak bisa tidak sesar lokal itu harus bergeser
    bukan, meski nilai pergeserannya mungkin sangat kecil hingga tidak
    menimbulkan retakan di permukaan tanah. Mari kita berandai-andai,
    anggaplah pergeseran tersebut meliputi segmen sepanjang 1 km dalam
    sesar lokal itu, maka ” seharusnya ” sudah diiringi gempa dengan Mw =
    4,7.
    Jika segmen yang bergeser hanya 200 m, gempa yang terjadi memiliki Mw =
    4,1. Bukankah moment magnitude (Mw) sebesar ini masih bisa dideteksi
    dengan mudah oleh seismograf2nya BMG dan USGS. Apalagi USGS memberi
    batasan hanya gempa2 dengan Mw > 3,5 saja yang akan
    didokumentasikan. Sementara, sejauh yang saya tahu, stasiun2 BMG di
    Surabaya dan Karangkates hanya melaporkan adanya guncangan akibat gempa
    Yogya saja, namun tidak menyebutkan adanya gempa lain atau aftershocks
    dengan episentrum di sekitar Porong.

    3. Apakah energi gempa Yogya dirambatkan oleh sesar2 hingga sampai ke Porong ?

    Sesar Besar Jawa Tengah Van BammelenIni
    masih terkait dengan pertanyaan no. 2. Mengikuti pendapat pak Awang dan
    pak Andang, saya mencoba menarik garis imajiner terusan sesar Opak ke
    arah timur laut. Saya juga mencoba menarik garis imajiner yang
    menghubungkan sumur Banjar Panji 1 – Purwodadi – Mojokerto – Sangiran,
    titik2 dimana terdapat mud volcano atau sumber air asin. Hasilnya bisa
    dilihat pada gambar ” situasi bp1 sangiran.jpg “.
    Menarik sekali bahwa garis imajiner yang menghubungkan Banjar Panji 1 –
    Purwodadi – Mojokerto – Sangiran ternyata menyusuri sisi selatan
    Pegunungan Kendeng, dimana menurut van Bemmelen disini terdapat ” sesar
    Simo ” yang longitudinal terhadap pulau Jawa.
    Sementara garis perpanjangan sesar Opak, justru melintas amat jauh
    terhadap Porong. Perpanjangan sesar Opak justru melintasi sesar
    pembatas Bawean High – Tuban Graben di Laut Jawa. Menarik juga, bahwa
    lintasan perpanjangan sesar Opak di Pegunungan Kendeng dan geosinklin
    Jawa utara ditandai dengan banyaknya sesar2 lokal yang orientasinya
    sebagian besar paralel dengan sesar Opak.
    Dalam pendapat saya, koq tidak ada ya hubungan segaris antara mud volcano di Porong dengan sesar Opak.
    Terkecuali jika dikatakan sesar Opak yang berarah barat daya – timur
    laut ini bersambung dengan ” sesar Simo ” yang berarah barat – timur,
    dimana titik persambungannya ada di sekitar Sangiran. Namun, logikanya,
    jika hal seperti itu yang terjadi, seharusnya terdeteksi juga
    aftershock di sepanjang ” sesar Simo ” bukan ? Karena energi gempa
    Yogya “seharusnya ” merambat di sini.
    Apalagi menurut van Bemmelen, sesar Opak adalah bagian dari sesar
    transversal yang membelah Jawa dari selatan ke utara. Sesar transversal
    ini (saya mengistilahkannya dengan ” sesar besar Jawa Tengah “) menjadi
    tempat berdirinya gunung2 api Merapi, Merbabu, Telomoyo, Ungaran hingga
    berakhir pada sesar Glagah di utara. Memang sesar besar ini juga
    berpotongan dengan perpanjangan ” sesar Simo “, namun titik potongnya
    jauh di utara dari sesar Opak, di tempat yang sekarang menjadi kerucut
    Gunung Merapi. Sesar Opak justru berpotongan dengan sesar longitudinal
    dari sisi utara Pegunungan Selatan (Pegunungan Sewu) di sekitar
    Prambanan, dan dari sini saya bisa memahami mengapa sesar2 minor produk
    gempa Yogya kebanyakan ada di Gunungkidul utara dan Klaten dengan
    sebagian besar berarah arah barat laut – tenggara, sehingga salah satu
    daerah yang kerusakannya sangat parah (selain Parangtritis – Prambanan)
    adalah Kecamatan Gantiwarno – Wedi – Bayat (sebelah tenggara
    Prambanan). Gambaran tentang sesar besar Jawa Tengah ini bisa dilihat
    di ” sesar besar jawa tengah.jpg “.

    BPJ-1 to Sangiran4.
    Jika gempa Yogya menyebabkan mud volcano di Porong, mengapa gempa yang
    sama juga tidak menyebabkan peningkatan aktivitas mud volcano Bledug
    Kuwu atau membangkitkan kembali aktivitas Sangiran Dome ?

    Apalagi dua tempat terakhir itu lebih dekat terhadap pusat gempa
    dibanding Porong. Dan sejauh ini tidak ada peningkatan jumlah lumpur di
    Kuwu ataupun bangkitnya kembali Sangiran Dome. Peningkatan aktivitas
    hanya ada di Gunung Merapi dan ini bisa dipahami mengingat dari
    Prambanan ke arah utara ada sesar yang langsung menuju ke Merapi.
    Sehingga rambatan energi gempa Yogya, setelah melintasi sesar Opak,
    sangat mungkin berbelok menyusur sesar tadi,sehingga dapur magma Merapi
    menerima tambahan energi.

    ***

    Saya merasa, mengaitkan gempa Yogya dengan mud volcano di Porong
    jauh panggang dari api. Gempa memang punya kemampuan likuifaksi, tapi
    jangkauannya juga terbatas. Apalagi, merujuk hasil penelitian BMG
    seperti dipaparkan Tiar Prasetya, gelombang primer dalam gempa Yogya
    tidak merambat homogen ke segala arah, tetapi terkutubkan
    (terpolarisasi) hingga seakan-akan membentuk pola bunga melati.
    Pengutuban ini menjadi faktor penjelas mengapa kerusakan parah – selain
    di sepanjang jalur sesar Opak – hanya dialami sebagian kota Yogya ,
    tepatnya mulai dari kompleks kampus IAIN dan Tamansiswa ke arah timur.
    Bagian barat kota Yogya, demikian juga dengan kecamatan Gamping, Sedayu
    dan Sentolo, relatif mengalami kerusakan ringan.

    Jalur kerusakan berat ke barat menghampiri Srandakan – Purworejo dan ke timur melintasi Pacitan. Kalo sumbu
    polarisasi ke timur ini diteruskan, posisinya juga jauh dari Porong, pak Rovicky.

    Demikian pendapat dan pertanyaan saya pak Rovicky. Matur nuwun atas pencerahannya.

    Wassalamu’alaykum

    Ma’rufin

     

  • Conclusive Vote on Cause of Indonesian Mud Volcano

    Professor Richard Davies
    Professor Richard Davies

    A Durham University scientist has played a key role in helping determine the cause of the Java mud volcano, Lusi.

    Two years’ of global public debate over the possible causes of Lusi has finally concluded. A resounding vote of international petroleum geologists from around the globe, including Durham University geologist Professor Richard Davies, concluded the mud volcano was triggered by drilling of a nearby gas exploration well.

    This may have implications for compensation of the local population affected. (more…)

  • TEMPO Interaktif – Pengusutan Hukum Kasus Lapindo Buntu

    "Tanpa itu, hasil konferensi hanya sebagai referensi kita," kata Mulyono,
    kepala seksi penerangan hukum kejaksaan tinggi, di Surabaya kemarin.

    Dalam pertemuan geolog dunia itu mayoritas peserta mengatakan semburan lumpur
    yang sudah berlangsung sejak Mei 2006 tersebut akibat kesalahan pengeboran.

    Kepolisian Daerah Jawa Timur telah menetapkan 13 orang sebagai tersangka.
    Namun, sampai saat ini pengusutan hukum kasus semburan lumpur tersebut masih
    menemui jalan buntu.

    Kejaksaan menilai penyidikan yang dilakukan Polda Jawa Timur belum sempurna
    meskipun telah empat kali dilimpahkan.

    Kepala Polda Jawa Timur Irjen Herman Surjadi Sumawiredja beberapa waktu yang
    lalu meminta kejaksaan segera menyatakan sempurna (P-21) atas berkas perkara
    Lapindo.

    "Kasus lumpur terjadi karena kesalahan dan kelalaian. Saya hanya berharap
    kejaksaan sesegera mungkin memprosesnya sehingga semuanya bisa mendapatkan titik
    terang," kata Herman.

    Juru bicara Lapindo, Yuniwati Teryana, mempertanyakan pemungutan suara dalam
    konferensi di Afrika Selatan itu. “Diskusi ilmiah, yang seharusnya untuk
    mengungkapkan kebenaran ilmiah, namun diakhiri dengan voting, tidak lazim dalam
    forum ilmiah,” kata Yuniwati melalui siaran pers. AQIDA | KUKUH SW | ROHMAN
    TAUFIQ

     

  • KOMPAS – Geolog Dunia Yakin Lumpur Tak Dipicu Gempa

    ”Pemungutan suara diambil setelah empat presentasi dan tanya jawab hingga dua
    setengah jam,” kata ahli pengeboran minyak anggota Drilling Engineers Club (DEC)
    Susila Lusiaga kepada wartawan di Jakarta, Kamis (30/10). Kamis pagi, ia dan
    ahli perminyakan Institut Teknologi Bandung (ITB) Rudi Rubiandini baru tiba dari
    Cape Town.

    Sejauh ini, hasil pemungutan suara itu menjadi dukungan terbesar bahwa
    semburan lumpur tak terkait gempa. Sebaliknya, terkait pengeboran sumur
    Banjarpanji- 1 (BP-1).

    Sebelumnya, secara individu dan dalam kelompok-kelompok kecil, para geolog
    dan ahli pengeboran menyatakan pengeboranlah pemicu utama, yang dibantah
    geolog-geolog lain. Dua kubu pun tercipta.

    Atas dasar hasil pemungutan suara itu pula, Gerakan Menutup Lumpur Lapindo
    (GMLL) meminta pemerintah serius menanggapinya. Bahkan, pemerintah didesak
    menjadikan hasil diskusi itu sebagai salah satu bukti penguat kasus gugatan
    hukum terhadap Lapindo Brantas Inc.

    ”Sikap (pemungutan suara) itu jelas dari para pihak independen yang
    meyakinkan dan dapat dipercaya. Itu layak dipertimbangkan,” kata Taufik Basari
    dari Lembaga Bantuan Hukum (LBH) Masyarakat, salah satu anggota GMLL.

    Berdasarkan hasil pertemuan di Cape Town, GMLL akan menyurati Presiden.
    Intinya, meminta agar penanganan hukum dan sosial diperbaiki.

    ”Surat akan segera kami kirim dalam waktu dekat,” kata salah satu deklarator
    GMLL Letjen Mar (Purn) Soeharto.

    Dihubungi di Cape Town, geolog yang juga Senior Vice President PT Energi Mega
    Persada Bambang Istadi mengatakan, pemungutan suara tidak mewakili pendapat
    geolog seluruh dunia. Lama presentasi dan diskusi juga terbatas.

    ”Namun, kesempatan itu membuka peluang menentukan kerja sama menentukan
    kejadian sebenarnya,” kata dia. Ia dan Nurrochmat Sawolo, Senior Drilling
    Adviser PT Energi Mega Persada, memaparkan fakta dan data seputar pengeboran
    sumur BP-1 dalam sesi diskusi tersebut.

    Rencananya, lanjut Bambang, Lapindo akan mengadakan forum diskusi tertutup,
    termasuk mengundang geolog Inggris Richard Davies, yang menyatakan pengeboran
    sebagai pemicu semburan, untuk membaca dan menganalisa data serta fakta
    pengeboran. ”Mari saling terbuka, tanpa prasangka. Analisa data dari hasil
    lapangan,” kata dia.

    Penderitaan warga

    Di tengah pembahasan geolog tingkat dunia, London, Inggris, dan Cape Town,
    Afrika Selatan, puluhan ribu warga korban lumpur masih tinggal dalam
    kekhawatiran. ”Warga fokus pada tuntutan yang belum juga dipenuhi,” kata
    pendamping warga, Paring Waluyo.

    Saat ini, tak sedikit warga yang belum menerima ganti rugi 20 persen. Apalagi
    sisa 80 persennya. Kelompok warga yang menerima skema pindah tempat tinggal dan
    kembalian pun, mengeluhkan sistem pengangsuran kembalian.

    ”Semua skema yang dipilih warga untuk ganti rugi, menyisakan kekecewaan
    karena pembayaran tersendat dan itu terus bertambah,” kata Paring. Sementara
    itu, semburan lumpur terus terjadi tanpa solusi lain, selain penanggulangan dan
    mengalirkan ke sungai yang terkendala.

    Pihak Lapindo, hingga awal September 2008, mengaku telah mengucurkan dana Rp
    4,39 triliun untuk berbagai keperluan. (GSA)

    http://cetak.kompas.com/read/xml/2008/10/31/01082166/geolog.dunia.yakin.lumpur.tak.dipicu.gempa

     

  • Geologists Blame Gas Drilling for Indonesia Mud Disaster

    img_0641The University of Durham, in northeastern England, said 74 top scientists in petroleum geology debated Lusi at a conference in Cape Town, South Africa on Tuesday.

    Four experts put forward varying hypotheses, including the university’s professor of geology, Richard Davies, it said in a press release.

    Forty-two scientists voted in favour of Davies’ argument that the cause lay with a gas exploration well, Banjar-Panji-1, that was being drilled in the area by oil and gas company Lapindo Brantas, it said. (more…)

  • ANTARA – Kaukus DPR Desak Pemerintah Selesaikan Masalah Lapindo

    "Wilayah empat desa ini sudah diusulkan dan mendapatkan persetujuan

    DPR
    RI

    tanggal 11 September 2008," kata Suripto yang juga Wakil Ketua Komisi III
    (bidang hukum) DPR itu.

    Menurut politisi PKS itu, kondisi keempat wilayah desa itu sudah sangat tidak
    layak huni lagi akibat dampak lumpur yang menyebabkan sumber-sumber penghidupan
    warga disana seperti sumur dan sawah, tidak dapat digunakan lagi.

    Tidak layaknya daerah tersebut juga dikarenakan munculnya bubble gas baru yang
    tidak terkendali. khususnya di Siring Barat, Mindi dan Jatirejo Barat serta
    penurunan tanah (land subsidience) sehingga banyak bangunan yang retak dan akan
    ambruk.

    Kaukus juga mendesak agar pembayaran pembelian tiga desa, yakni Besuki,
    Kedungcangkring dan Pejarakan yang juga diluar peta terdampak agar dilakukan
    secepatnya paling lambat satu bulan sebelum masa kontrak rumah berakhir. (*)

     

  • ANTARA – Semburan Lumpur Sidoarjo Diperkirakan Berlangsung 140 Tahunasus Lapindo Butuh Advokasi Internasional

    Dalam konferensi geologi internasional yang berlangsung 21-22 Oktober lalu,
    semua geolog internasional sepakat semburan lumpur Sidoarjo (Lusi), yang
    dikenal sebagai lumpur Lapindo adalah sebuah mud volcano yang biasa muncul
    akibat remobilisasi sedimen dan fluida cekungan bawah tanah.

    Gunung lumpur itu sudah tidak menjadi isu hangat lagi dalam konferensi geologi
    internasional yang berlangsung di Burlington House Piccadilly London. Namun isu
    pemicu terjadinya Mud Volcano menjadi fokus diskusi dalam pertemuan pakar
    geologi dunia itu.

    Beberapa geolog kelas dunia itu bahkan berpendapat, merasa beruntung karena
    bisa menjadi saksi dan mempelajari gunung lumpur raksasa yang sedang lahir dan
    tumbuh.

    Pada kesempatan itu juga dijelaskan bahwa gunung lumpur akibat remobilisasi
    lumpur bawah tanah itu sudah lama menjadi obyek penelitian ilmuwan global. Ilmuwan
    Eric Deville dari Perancis dalam membe
    rikan
    ceramah utamanya mengatakan, "mud volcano adalah sebuah sistem bumi agar
    lestari".

    Puncak sesi diskusi mengenai Lusi ketika Dr. Richard Davies dan ketiga temannya
    menyatakan bahwa semburan Lumpur Sidoarjo adalah akibat pemboran (drilling) BJP
    I.

    Namun peserta seminar Dr. Nurrohmat Sawolo ahli drilling dari PT Energi Mega
    Persada (EMP) langsung menepis hipotesa tersebut. Karena semua data yang
    dijadikan dasar penyimpulan Davies sangat beda dengan data drilling otentik
    yang dimiliki Lapindo. Padahal data versi Lapindo itu asli dan menjadi pegangan
    kepolisian dan kejaksaan RI dalam penyidikan kasus Lusi, katanya.

    Pembicara dari

    Indonesia
    ,
    Bambang Istadi menyimpulkan bahwa semburan Lusi bukan disebabkan oleh "underground
    blowout". "Dasarnya ada empat fakta berdasar data autentik
    Lapindo," jelasnya. Pertama, data rekaman tes temperatur dan sonan selama
    50 hari terhadap sumur BJP I menunjukan hasil menolak fenomena blowout. Fakta
    kedua tidak ada luberan, gas, steam, ataupun lumpur keluar dari Sumur BJP
    ketika dibuka.

    Fakta ketiganya adalah melalui re-entry diketahui mata bor tidak jatuh walau
    semburan yang berjarak 200 meter dari sumut BJP itu sudah berlangsung satu
    setengah bulan. Bila terjadi underground blowout pasti mata bor itu jatuh
    karena material lumpur yang keluar sudah jutaan ton.

    Fakta keempat tidak ditemukan "synthetic oil based drilling" dalam
    tes di berbagai titik survey semburan. "Semua fakta menunjukan sumur BJP
    masih sehat dan tidak terkoneksi dengan semburan," jelasnya.

    Peserta conference Dr. Christopher Jackson dari Imperial College London
    menyarankan solusi. "Harus segera ada kerjasama dan sharing data agar
    penyimpulan pemicu semburan Lusi menjadi benar," ujarnya.

    Sejak awal peserta geolog internasional yang datang dari Ame
    rika, Kanada, Perancis, Italy, Norwegia, Australia,
    German, Turki, Namibia, dan penjuru Inggris, Wales dan Skotlandia dalam
    konferensi ini sepakat bahwa Lusi sebuah mud volcano sebagai produk
    remobilisasi sedimen dan aliran fluida diwilayah cekungan bumi yang lemah.
    Karena itu semburan Lusi tidak bisa ditutup. (*)

     

  • Mud Victims Spooked by Own Ghost Towns

    PROLONGED MAKESHIFT LIFE: For nearly a year, 80-year-old mudflow victim Muana has lived in a makeshift hut erected along the defunct Porong toll road in Sidoarjo, East Java, beset by searing heat and numbing cold alternately, and hoping for a better life in the near future. She has urged the government to come up with the best solution for mudflow victims from the affected villages located outside the official map of affected areas. (JP/Indra Harsaputra)
    PROLONGED MAKESHIFT LIFE: For nearly a year, 80-year-old mudflow victim Muana has lived in a makeshift hut erected along the defunct Porong toll road in Sidoarjo, East Java, beset by searing heat and numbing cold alternately, and hoping for a better life in the near future. She has urged the government to come up with the best solution for mudflow victims from the affected villages located outside the official map of affected areas. (JP/Indra Harsaputra)

    Hundreds of houses in three villages were inundated with mud in Sidoardjo in February, and thousands of people were displaced from their homes, forcing them to live in makeshift tents erected along an abandoned toll road.

    While the sturdier structures in the three villages — Besuki, Kedung Cangkring and Renokenongo — were left inundated with mud and are now homes to various animals, the wooden houses were merely turned into rubble.

    “Most residents no longer have the courage to enter the ghost-like houses. We have left them to serve as silent witnesses to the disaster that has devastated not only our assets but also our community and future,” 54-year-old Paimin of Besuki told The Jakarta Post here Saturday.

    Another resident, 80-year old Muana, said that for the past eight months her family had lived without possessions and without hope.

    “I rely on my two children and their three grandchildren who are now staying with me in this bamboo hut,” she said.

    Muana’s 40-year-old daughter Munifah and 35-year-old son Ismael and their families have been living in the four meter by six meter hut since the mudflow submerged their makeshift houses in Besuki.

    They have made their livings as street vendors at a nearby housing compound ever since Lapindo Brantas Inc., an energy company that operates the mining site in Porong district that triggered the devastation, stopped distributing humanitarian aid last May.

    “We were hopeless and desperate when our aging mother contracted diarrhea. We had to borrow some money from neighbors so we could take her to a doctor at the nearby public health center,” said Munifah, who looks far older than her eight years.

    She said many people, including her mother, had contracted diarrhea after consuming water from ground wells that had been contaminated by toxic mud.

    Ismael said the village’s residents had received nothing from the government or Lapindo despite promises of immediate compensation for mudflow victims made by BPLS, the government agency tasked with handling the disaster.

    “BPLS and the village head have frequently come here to make sure that the government will pay the compensation soon but so far we have been given empty promises,” he said.

    Many people claiming they are refugees, he said, have filed complaints with BPLS and the local administration. They attempted to stage a protest against Lapindo, he said, but the company’s middlemen thwarted the attempt.

    He said the damage to his house and farmland had been assessed by the local government, and that he and all of the other village residents had been informed of the amount of compensation they were due, but that they had never received it.

    “We are not beggars but we have been left without answers. The government should have paid the compensation 14 days after the deal (on compensation payment) was signed,” he said, adding that the deal was signed in early August.

    Besuki, Kedung Cangkring and Renokenongo are among nine villages that were devastated by the February mudflow.

    Four villages were destroyed by a mudflow that hit on May 29, 2006, creating a giant lake of mud.

    Some of the residents of the four villages received 20 percent of the compensation promised to them. They continue to demand the remaining 80 percent.

    Some of the 600 residents of Renokenongo village currently living in makeshift shelters inside Porong market said they were disappointed Lapindo had broken its promise to pay the compensation last month.

    “Lapindo committed to paying the compensation once it had finished assessing the residents’ damaged assets in mid September. Yet, they have given no reasons for why the payments have been suspended,” said Pitanto, coordinator of the Renokenongo mudflow victims association.

    Pitanto also called on non-governmental and religious organizations to help encourage Lapindo and the government to immediately pay the compensation to the mudflow victims.

    BPLS spokesman Zulkarnaen said the government would disburse Rp 160 billion immediately to pay 20 percent of the total compensation to the residents of the three villages located outside the disaster location.

    “The compensation will be paid immediately to 1,481 victims from the three villages,” he said, but declined to name a date for the payment.

    Indra Harsaputra, The Jakarta Post

    Sumber: http://www.thejakartapost.com/news/2008/10/20/mud-victims-spooked-own-ghost-towns.html

  • Victims Refuse to Sell Muddy Land to Lapindo

    Some 69 families in the East Java villages of Jatirejo, Siring and Renokenongo are standing their ground, refusing to sell their land as part of the compensation plan proposed by the energy company being held responsible for the mudflow disaster.

    “If we accept the proposal the company is offering, it will amount to turning our land into cash, but in principle that’s not what we want to do,” Ipung, a spokesperson for the villagers, told The Jakarta Post.

    Some 69 families in the East Java villages of Jatirejo, Siring and Renokenongo are standing their ground, refusing to sell their land as part of the compensation plan proposed by the energy company being held responsible for the mudflow disaster.

    “If we accept the proposal the company is offering, it will amount to turning our land into cash, but in principle that’s not what we want to do,” Ipung, a spokesperson for the villagers, told The Jakarta Post.

    Lapindo Brantas Ltd., a giant energy company belonging to the Bakrie family, has proposed compensation for the residents.

    “This land belonged to our ancestors and our ancestors entrusted it to us,” said Ipung, who was born in the village of Jatirejo.

    Jatirejo, Siring, and Renokenongo are three of seven villages affected by the Lapindo mudflow disaster which began when mud gushing from a mining site in Porong district, Sidoarjo regency, May 29, 2006.

    Initially, the four villages of West Siring, Jatirejo, Mindi, and Renokenongo were inundated. In February this year, three more villages, Besuki, Kedungcangkring and Pejarakan were likewise buried in hot mud that sprang out of new, adjacent leaks.

    In a matter of days, the Porong district villages, near the East Java capital of Surabaya, were wiped from the map. Since then, disaster victims have organized themselves into several forums to advocate for their rights.

    Ipung said his group of 69 families still refused to take any compensation offered by Lapindo.

    “They tried to first intimidate us then bribe us so we would take the compensation and sell our land.”

    He said further he was once visited by a stranger armed with a pistol and offered a bribe to stop encouraging other residents to decline Lapindo’s compensation offer. Despite his efforts, most disaster victims have accepted the initial compensation from the company, including some Jatirejo villagers.

    According to the two-phased offer, Lapindo paid out 20 percent of the full compensation in advance to all residents. Those with deeds were supposed to receive the remaining 80 percent in cash by June 2008; those without, should have received an offer of housing.

    However, Lapindo switched the second cash disbursement for titled victims with a new offer of existing housing in the Kahuripan Nirvana Village housing complex located in the Surabaya outskirts.

    Lapindo was supposed to pay the 80 percent in the form of land and housing only to people without land deeds.

    Some victims have rejected the offer because they feel living in a housing complex would disrupt their culture and traditions. “A housing complex doesn’t suit us because we used to live in the village far from the city and we depend on vast areas of land for our farming,” said Pitanto, a leader of the Renokenongo mudflow-victim group.

    The villagers have instead demanded Lapindo compensate them with land and housing of the same value that they lost, not with cash.

    “We ended up accepting the worst possible compensation scheme because of the pressure of trying to make ends meet,” Pitanto said.

    The compensation process is expected to be completed by the end of this year. Most of the mudflow victims hope either Lapindo or the government will pay the compensation soon so they can use it to buy land, rebuild their villages and start all over again.

    Faisal Maliki BaskoroThe Jakarta Post

    Sumber: http://www.thejakartapost.com/news/2008/10/13/victims-refuse-sell-muddy-land-lapindo.html

  • Indonesia’s One-Man Wrecking Crew

    Friday, 10 October 2008, written by Our Correspondent

    The Jakarta Stock Exchange remains closed after Bakrie Group companies are suspended from trading amid allegations of irregularities Indonesia’s billionaire Chief Welfare Minister Aburizal Bakrie, whose companies are already being held responsible for the biggest man-made environmental disaster in Indonesian history, is now in trouble for playing a major role in wrecking the country’s stock market, which has been closed for three days.

    The Jakarta Stock Exchange remains closed after Bakrie Group companies are suspended from trading amid allegations of irregularities

    Indonesia’s billionaire Chief Welfare Minister Aburizal Bakrie, whose companies are already being held responsible for the biggest man-made environmental disaster in Indonesian history, is now in trouble for playing a major role in wrecking the country’s stock market, which has been closed for three days.

    Six companies controlled by the powerful Bakrie Group were suspended from trading Tuesday on the Indonesia Stock Exchange in the wake of wild gyrations in prices that drove the group’s shares down by 30 percent.

    The exchange has ordered a probe into trading of the shares, with traders and analysts openly saying the stocks had been manipulated to drive up their price. Lenders to the Bakrie Group, wary after being burnt the first time his empire collapsed after the 1997 Asian financial crisis, are believed to have sought his family companies’ stock as collateral. The stock comes with stringent conditions and bankers worry that some loan covenants may be triggered if the stock remains untradeable. The group has not disclosed what the conditions of group loans are.

    Given Bakrie’s political clout and the fact that his companies have routinely escaped scrutiny by government officials, it is questionable how far the investigation will go. However, the disastrous blowout of a Bakrie-controlled gas well two years ago and the environmental damage it did, plus other problems, may have made him less than welcome in the cabinet of President Susilo Bambang Yudhoyono, who has made reducing corruption a major goal of his administration. The country’s indefatigable Corruption Eradication Commission has been arresting politicians right and left.

    The exchange’s benchmark composite index plummeted more than 21 percent this week, the biggest three-day fall in 20 years as major foreign investors pulled back from emerging markets, and particularly those as dicey as Indonesia’s. The Jakarta Stock Exchange was Asia’s worst-performing market before exchange president Erry Firmansyah shut it Wednesday. There was hope that it would reopen on Friday, but Firmansyah told reporters it would remain closed to give investors a chance to “calm down before they make decisions.”

    While suspicion has focused on the Bakrie-owned PT Bumi Resources Tbk, the country’s largest coal miner, it has also shone a spotlight on the Jakarta Stock Exchange as well, which has often been likened to a gaming casino rather than a rational market, with rampant insider trading and traders taking control of blocks of stock in so-called “pump and dump” pyramid selling games between them to drive up the price and draw in retail investors. A classic game is to drive up the price of a stock by selling it between each other until enough unsuspecting investors have been drawn in, then to sell and get out, watching the price drop precipitately.

    PT Agis Tbk, a general trading and electronics company, is a case in point. In June of 2007, Agis was responsible for the collapse of the composite index when 20 brokerages defaulted on trades in the company’s shares worth Rp23 billion. Agis’s share price had risen from Rp300 to Rp4,000 in less than six months before plummeting.

    Similarly, PT Bumi Resources was the focus of hyperactive trading during the runup in commodity prices earlier this year.

    “Among these six companies under the Bakrie Group banner, Bumi Resources is the prima donna,” Sugianto, a market trader with BNI Securities, told local media. Sugianto noted that trading in Bumi Resources accounted for almost 30 percent of the movement in the index every month.

    Although in June soaring coal prices pushed Bumi up to make it the largest capitalized company on the exchange, its shares have plunged 75 percent since hitting a record high of Rp8,750 on June 10.

    Bayburs Alfaris, an independent market analyst, said trading in Bumi was dominated by so-called “market makers,” who are able to drive prices up or down. “It was the market makers who drove Bumi’s stock price on the exchange,” Alfaris said, calling the stock a “beautiful play” during its heyday.

    Bumi was trading at Rp950 on January 2 before it began its exponential, almost ten-fold rise. Apart from the uptrend in commodity prices, Alfaris said, the increase in Bumi’s stock price helped it succeed in its bid to acquire Australia-listed Herald Resources Ltd.

    Herald’s main asset is its 80 percent interest in the undeveloped Dairi lead and zinc mine, which is awaiting a permit before construction work can start. The Indonesian state-controlled nickel producer PT Aneka Tambang Tbk owns the other 20 percent.

    Both Alfaris and Sugianto said they are suspicious about the trading in Bumi stock movements, although they caution that it appeared to have been done within market rules.

    “What we see is that the market makers maintained the movement of prices within the range permitted by the market rules,” Alfaris said. “While it appeared to be real, in reality it was all artificial.”

    “Bakrie Group stocks have always been the target of speculators,” Sugianto said. “They are very risky for serious investors.” He added that Bumi’s stock would likely fall further once trading resumed. “Margin calls will put additional pressure on Bumi’s stock price,” he said.

    Alfaris noted persistent market reports that parent company PT Bakrie & Brothers had defaulted on recent stock-related debts, another factor pushing sentiment down. A briefing by Bakrie that had been planned for Thursday has been rescheduled to next week.

    The Bakrie family, one of Indonesia’s richest, has continued to escape regulatory scrutiny by government officials despite a litany of complaints. The biggest came in May of 2006, when a gas well being drilled near Surabaya by Lapindo Brantas, a subsidiary of the Bakrie family-owned Energi Mega Perseda, blew out into a mud volcano that so far has drowned more than 14,000 homes, 33 schools, 65 mosques, a major toll road and an orphanage and continues to produce more than 20 Olympic swimming pools of stinking mud every day. Lapindo so far has agreed to pay out Rp4 trillion rupiah in compensation to villagers who have lost their homes.

    Asia Sentinel reported on September 22 that mud and gas have continued erupting ever since, defying all efforts to stop it and inundating a vast area of Surabaya. Hundreds have been sent to hospitals with breathing difficulties. Scores of factories have heen closed, at least 90 hectares of paddy fields were ruined and fish farms have been destroyed.

    Nonetheless, Indonesia’s Environment Ministry in September gave the company a green citation for complying with environmental standards. The award prompted embarrassment from officials and was soundly denounced by environmentalists.

    Despite Lapindo’s claim of faultlessness, it is paying Rp4 trillion (US$437 million) in compensation to villagers who lost their homes to the mudflow. Most people seem to have received 20 percent of their payment but they are still waiting on the rest.

    (c) Asia Sentinel

  • Jakarta Post Editorial: The Burning Seat

    Finance Minister Sri Mulyani has been sitting in the hot seat for some time now, and now her seat has now gone from hot to burning since businesspeople and politicians with vested interests have been making attempts to unseat her. We earnestly hope she will survive this saga.

    The imbroglio, we suspect, is related to what has been going on in the financial market, especially to the Bakrie Group. Many believe Bakrie is now in a make-or-break situation as it struggles to meet huge obligations to its creditors who hold shares in its subsidiary companies as collateral.

    Now that the value of this collateral has dropped significantly, Bakrie is trying to sell off its assets to repay $1.2 billion worth of debts that will mature between the end of this year and early next year.

    As the situation worsens, the Bakrie Group, controlled by the family of Coordinating Minister for People’s Welfare Aburizal Bakrie, may make a desperate attempt to get President Susilo Bambang Yudhoyono to bail them out using either state money or funds from state companies.

    It seems that most cabinet ministers and even Vice President Jusuf Kalla have made no objections to such a move. But Finance Minister Sri Mulyani, who holds the key to the state coffers, differs and even resists a move that smacks of a raw deal.

    We are concerned whether Sri Mulyani will be able to maintain her strong stance in the face of mounting pressure from various quarters. Because of her persistent anti-graft reform drive at the ministry, she has established more enemies than anyone else in her position previously.

    Her reform of the customs office at Indonesia’s largest port, Tanjung Priok, has cost certain businesspeople dearly. Those who once took an easy route by bribing customs officials to get their goods out of the customs area quickly (often by smuggling or under-invoicing imports), now find it much tougher to slip through.

    Worse, several parties now claim that customs officials who were dissatisfied with Mulyani’s work have intentionally slowed their pace of work. This development has impacted honest businesspeople who must bear higher capital costs because of the slowed movement of their goods. So now both kinds of businesspeople have a reason to dislike her.

    Mulyani’s anti-graft reforms at the tax office have also taken their toll. One good example is the much-publicized zealous efforts of the tax office to uncover the suspected tax evasion of a palm oil company belonging to Raja Garuda Mas Group, controlled by powerful businessman Sukanto Tanoto.

    Mulyani has also engaged in confrontations with certain coal producers, asking the immigration office to impose travel bans on businesspeople with coal interests who owed the state unpaid royalties and taxes. One such coal company belongs to the Bakrie Group.

    But Mulyani had clashed with the Bakrie Group before this, when, through the Capital Market Supervisory Agency, she rejected a plan by Bakrie’s oil and gas entity, Energi Mega Persada, to spin-off Lapindo Brantas (which had created massive problems in Sidoarjo resulting from an uncontrolled mudflow that is believed to have resulted from Lapindo drilling activities there). This case was finally resolved, with Energi allowed to sell Lapindo to wash its hands of an uncertain future liability.

    And now, Mulyani is clashing with Bakrie again. This time, however the clash looks to be protracted, as Bakrie is in a do-or-die situation where it needs to attract buyers or get help from the state or it will face bankruptcy or hostile takeover. Mulyani has said if companies must go bust, then let them be. After all, it is their fault, and why should the government come to rescue them.

    Because of her persistence in protecting the state budget from abuse, Mulyani’s enemies have launched a covert operation to unseat her. In the public domain, concerted efforts have been made to discredit Mulyani — claiming she is “un-nationalistic” for her unwillingness to help out local indigenous businesspeople. Some of these people have even accused her of being a running dog for the International Monetary Fund, where she once served as an executive director.

    On the contrary, by acting firmly to clean up the customs and tax offices, by penalizing corrupt businesspeople and by acting firmly to defend the state budget from abuse, we can see Mulyani is in fact more nationalistic than those who have attempted to discredit her.

    The current political situation may present itself to President Yudhoyono as a big dilemma: whether to help his business friends, or to side with the impeccable and respected finance minister. But the choice is really clear.

    Thu, 10/23/2008 11:04 AM  |  Opinion | The Jakarta Post

    Sumber: http://www.thejakartapost.com/news/2008/10/23/editorial-the-burning-seat.html

  • Santos Stuck in Mudflow Controversy

    SIDOARJO, INDONESIA– Santos is facing a blowout in the clean-up bill from the world’s largest mud volcano in East Java, as a new report funded by the Australian government concludes the disaster cannot be contained.

    The study, which was conducted by the United Nations Environment Program and AusAid and is yet to be made public, says transporting the mud 14 kilometres to the ocean and creating a new wetland is the only titigation option available.

    These updated costings of as much as $830 million are nearly 10 times higher than Santos has disclosed to the stockmarket, leading to accusations that the oil and gas major is deliberately playing down the severity of the disaster.

    The UN report also estimates the total economic losses from the mudflow so far at $3,4 billion.

    Santos has yet to admit liability for the disaster, which began after a drilling incident in May 2006, and it had paid almost no compensation to the 75,000 affected.

    “I don’t think there is wide public understanding of the magnitude of this problem,” says Tim Lindsay, director of the Asian Law Centre at Melbourne University.

    “If the projections are correct, it will be catastrophic for any company held responsible.”

    Santos has made provisions of just $88.5 million for the mudflow, which has now affected 1800 hectares of densely populated land in East Java.

    In a statement the company said it would not comment on the UN report, but believed its provisions remained an “appropriate estimate of its potential liability.”

    “The government of Indonesia has taken a major role in responding to the mudflow,” it said in a written statement.

    In its 2007 annual report Santos said its provisions were based on an assumption that “condition at the site will remain stable or improve over the longer term.”

    This is clearly not the case,” says John McLachlan-Karr, an Australian consultant leading the UN team.

    He says retaining walls at the site have failed three times this year and on current projections, the dams will overflow in 2009. This has forced the Indonesian government mitigation team to earmark another 110 hectares for mud lay-down areas, but this is viewed as only a temporary solution.

    The mud pools are growing by 20 olympic size swimming pools every day and the weight could make the area subside by 146 metres in the next decade.

    “It is true to say the volume of mud has declined somewhat but the retaining walls and geology of the area has become less stable,” McLachlan-Karr says.

    “If anything, the impacts are actually increasing.”

    It is this assumption that led the UN team of 12 scientists and engineers to conclude that the mud must be moved. Their 122 page report, commissioned by the Indonesian government, was compiled over the past 12 months. It outlines three possible courses of action. “There is, however, no easy answer,” McLachlan-Karr says.

    One option is to pipe the mud to the sea but there are concerns that the material is too viscous and the pumps would not be able to move the required volume.

    The second option is to pump the mud into a nearby river, which would then be dredged and dumped along the coast. But there is strong local opposition to this method and concern about the increased flood risk.

    Both these options would cost about $1,( billion over the next 25 years, according to the UN report.

    The final option is to build an open canal that would then transport the mud slowly to the ocean. This is the most expensive at $4,6 billion as land, including many shrimp farms, would have to be purchased.

    Santos, despite not admitting any liability for the disaster, is already paying its share of mitigation and clean-up costs, while maintaining the mud flow cause had “yet to be determined.”

    Santos has an 18 percent non operation stake in PT Lapindo Brantas, which experienced drilling problems near the site the day before the mud volcano erupted. Presuming it continued paying 18 percent of mitigation costs, Santos is facing a clean-up bill of between $355 million and $829 million over the next 25 years, according to the UN report.

    The UN team was not asked to determine the mudflow’s cause.

    This is a highly controversial subject in Indonesia, as a company associated with the country’s richest man, Aburizal Bakrie, is Lapindo’s major stakeholder. Bakrie, who is also one of the government’s most powerful ministers and a close allay of President Susilo Bambang Yudhoyono, has maintained the mudflow was triggered by an earthquake.

    This has been universally discredited.

    A team of British, US and Indonesian scientists said in June they were “99 percent certain” that drilling caused the disaster. Their findings were published in the academic journal Earth and Planetary Science Letters.

    Michael Manga of the University of California Berkeley rules out the Yogyakarta earthquake as a potential cause, saying it happened two days before and was 250 kilometres away.

    “In this case the earthquake was simply too small and too far away,” Manga says.

    The report’s lead author, Richard Davies of Durham University, says a “kick” in the well a day before the mudflow erupted resulted in an underground blow-out and a leakage of fluid. He says the chances of controlling this pressure would have increased if the well had contained more protective casing.

    This lack of protective casing raises the issues of negligence and liability.

    So far Santos has spent $US28,5 million ($34,9 million) on mitigation and clean-up efforts. A spokesman for the company said it had paid a small amount of compensation to victims, but would not disclose the figure.

    Bakrie has not admitted any liability for the disaster either, but due to “Indonesian values” has pledged to pay 4 trillion rupiahs ($526 million) in compensation. So far he is estimated to have handed over about 20 percent of this to those affected.

    But this is just a fraction of what the UN estimates the total damages to be. McLachlan-Karr says his team has calculated total economic loss caused by the mudflow, not including mitigation, at RP26 trillion as of April.

    Attempts to recoup these losses have so far been rejected by Indonesia’s notoriously corrupt lower courts. A class action by Friends of the Earth Indonesia has twice been rejected and is at present under appeal with the High Court, which ranks above the High Court in Indonesia.

    But Lindsay from Melbourne University says these early court decisions are irrelevant. He says the merits of the case will be decided when it reaches the Supreme Court, which ranks above the High Court in Indonesia.

    “The Supreme Court knows, understands and has been trained in class actions,” Lindsay says. “It is an increasingly impressive institution that has been making good decisions.” He says there will be serious legal implications for those found responsible.

    And whit each day the mud continues flowing, the potential damage get larger.

    Flooding during the wet season has been raised as yet another problem.

    McLachlan-Karr says the pumping of mud into a nearby river during the dry season has silted up the waterway and raised concerns about flooding.

    “They shouldn’t be pumping in the dry season but they literally ran out of space in the holding dams and so had no other option,” he says. “It’s not good but compared to the alternative, the consequences are relatively minor.”

    But then there’s the issue of subsidence.

    Davies from Durham University says the mudflow area could subside by 146 metres over the next 10 years.

    “That’s the worst case scenario,” he says, but no one can be sure of what impact this may have on the surrounding area.

    “This thing continues to surprise us so who’s to say what will happen next or how long it might last.”

    After more than two years, Davies says, the pressure causing the eruption has not lessened.

    “It will most likely carry on in some form for decades to come. The area will provide an interesting case study for scientists, but apart from that the land is worthless.

    (Angus Grigg)

    (c) The Australian Financial Review – ABIX via COMTEX

  • Santos Denies Poor Attitude Over Mud Mountain

    Australian oil and gas giant Santos has denied playing down the seriousness of a mud mountain, which it allegedly helped to create.

    The company, responding to a report on the unstoppable mudflow that was caused by a gas drilling incident in Indonesia in 2006, said it rejected suggestions that it has understated the severity of that incident.

    According to reliable reports from the UN and Australian governments, the disaster has so far caused economic damage of AUD$3.4 billion dollars to Indonesian land.

    Santos has declared provisions of just AUD$88.5 million dollars to the Australian Stock Exchange to cover the clean-up cost.

    Santos has not admitted any liability for the disaster.

    Foreign scientists in Indonesia have found the mud mountain was caused by drilling by an oil and gas firm linked to the scheme.

    (c) Sri Lanka Source

  • Santos Denies Playing Down Indonesia Mud Volcano Disaster

    SYDNEY (AFP) — Australian oil and gas giant Santos on Monday denied downplaying the seriousness of the disaster caused by the world’s largest “mud volcano” in Indonesia.

    The company was responding to a report that said it faced a ten-fold blowout of the clean-up bill from the unstoppable mudflow that was caused by a gas drilling incident in East Java in 2006.

    “Santos rejects any suggestion that it has understated the severity of that incident,” the company said in a statement.

    The company’s shares fell 3.6 percent following news of the clean-up cost of the area near Java’s second-largest city of Surabaya.

    Fairfax newspapers quoted a leaked report by the UN Environment Program (UNEP) and Australia’s government aid body AusAid as saying the disaster has so far caused economic damage of 3.4 billion dollars and could be contained.

    The study reportedly said the only way to mitigate the disaster would be to transport the mud 14 kilometers (8.75 miles) to the ocean to create a wetland, which would send the cost skyrocketing to 4.6 billion dollars.

    The mudflow could cost Santos 830 million dollars (681,762 US), the report said, while the firm has declared provisions of just 88.5 million dollars to the Australian Stock Exchange to cover the clean-up cost.

    The company, which has an 18 percent stake in a gas operation at the site, refused to comment on the UNEP report but said it believed that its declared provisions would be adequate.

    “Given the conditions at site and current activities being conducted, Santos believes that the provision remains an appropriate estimate of its potential liability associated with the incident.

    “As Santos has indicated previously, the situation remains dynamic, complex and uncertain. Santos will continue to review the adequacy of the provision in light of developments and available information,” the company added.

    Santos has not admitted any liability for the disaster.

    Santos shares were off 0.71 dollars, or 3.6 percent, in late trade at 18.66 dollars following the report.

    A study by foreign scientists in Indonesia has found the mud volcano was caused by drilling by oil and gas firm Lapindo Brantas, which holds a 50 percent stake in the scheme.

    (c) AFP

  • Santos Responds to Sidoarjo Mudflow Incident Report

    Monday, September 15, 2008 – Santos notes the article published in this morning’s Australian Financial Review containing speculation regarding its exposure to Sidoarjo mudflow incident in East Java. Santos rejects any suggestion that it has understated the severity of that incident.

    The Government of Indonesia has taken a major role in responding to the mudflow. Following from the national task force appointed to address the incident in 2006, the President of Indonesia established the Sidoarjo Mud Mitigation Agency in April 2007 with a long-term mandate to manage the issues associated with the incident. It has been doing so actively. Whilst the Agency is responsible for the ongoing response to and management of the incident, the incident remains a matter of significant concern to Santos.

    Santos has a non-operating 18% interest in the Brantas Production Sharing Contract. Lapindo, as Operator, continues to participate in all operations at the site. However, Santos has been supporting the efforts of the Agency and Lapindo and continues to believe that a resolution may ultimately be reached between all relevant parties.

    Santos is not in a position to comment specifically on the UNEP report. However, given the conditions at site and current activities being conducted, Santos believes that the provision remains an appropriate estimate of its potential liability associated with the incident. As Santos has indicated previously, the situation remains dynamic, complex and uncertain. Santos will continue to review the adequacy of the provision in light of developments and available information.

    © Oil Voice

  • Santos Defends $US79M For Indonesian Clean-up

    SANTOS has rejected suggestions that the $US79 million it has set aside to pay for its share of the Indonesian mudflow disaster is inadequate.

    CAMERON ENGLAND, September 15, 2008 11:30pm

    Reports yesterday quoted a United Nations Environment Program report, which said Santos’ share of the clean-up costs for the disaster could run as high as $830 million.

    UNEP spokesman Nick Nuttal yesterday cautioned that the report was “very much in draft form”.

    “Thus any findings released publicly now simply cannot be endorsed by UNEP, neither can any of the assertions, suggestions, observations or recommendations reported in the Australian press,” he said via email from Nairobi.

    Santos was a non-operating 18 per cent partner in drilling for gas at Sidoarjo in Indonesia, which experts say probably triggered a well blow-out and the subsequent mudflow disaster.

    The drilling at the site was conducted by Lapindo Brantas – part of a conglomerate owned by one of Indonesia’s richest families, of which People’s Welfare Minister Aburizal Bakrie is a member.

    The mud has continued to flow since the incident in May, 2006, and was estimated recently to be averaging 100,000 cubic meters a day.

    The mud has so far displaced an estimated 40,000 people and threatens another 60,000.

    The Jakarta Post has reported that a government investigation has not yet decided whether the disaster had natural or human-induced causes.

    A decision in the South Jakarta District Court late last year, which is being appealed, cited natural causes as the most likely cause of the incident.

    In the August edition of Geology, researchers including Australian academic Mark Tingay rejected the hypothesis that an earthquake was responsible, saying an earthquake at the time was too small and too far away to be the cause.

    A report on website Tempo Interactive on Saturday quoted Priyo Budi Santoso, deputy-chief of Indonesia’s House of Representatives, as saying that the Lapindo Mudflow Monitoring Team has “not done its job optimally”, with 98 new sources of mudflow discovered.

    Lapindo Brantas spokesman, Imam Agustino, was quoted as saying the company had disbursed 4.4 trillion rupiah ($582 million) in managing the mudflow.

    The Government has also reportedly allocated 1.194 trillion rupiah ($158 million) to manage the problem in 2009.

    © Adelaide Now

  • Santos says has provisions for clean-up bill

    Santos Ltd has rejected suggestions that it is facing a ten-fold cost blow-out in its clean-up of the world’s largest mud volcano in East Java.

    The oil and gas giant dismissed media speculation that it has understated the severtity of the incident, saying “given the conditions at site and current activities being conducted…existing provisions remain an appropriate estimate of its potential liability associated with the incident.”

    Santos was responding to a study, leaked to Fairfax newspapers, which said the only way to mitigate the disaster, resulting from a drilling incident in May 2006, was to transport the mud 14 kilometres to the ocean to create a wetland, estimated to cost between $1.9 billion and $4.6 billion over 25 years.

    The local company’s share of the bill would come to between $355 and $829 million, the report said.

    Santos said “the situation remains dynamic, complex and uncertain, and the company will continue to review the adequacy of the provision in light of developments and available information.”

    Santos owns an 18 per cent non-operating stake in PT Lapindo Brantas, which reported drilling problems a day before the eruption.

    Santos has yet to admit liability and has been accused of downplaying the disaster, which has been said is likely to cost the company 10 times more than it has revealed to the stock market.

    Tim Lindsay, director of the Asian Law Centre at Melbourne University, said most of the public does not understand the magnitude of the problem.

    “If the projections are correct, it will be catastrophic for any company held responsible,” Professor Lindsay told Fairfax.