Pak Irwan, Ingin tahu: jadi bagaimana caranya melihat pilihan yg lebih mungkin utk daerah yg masih low seismicity antara kemungkinan (1) minimnya potensi gempa versus (2) adanya gap seismic??
Thanks. Iman -----Original Message----- From: Irwan Meilano [mailto:[email protected]] Sent: Friday, July 02, 2010 7:43 PM To: [email protected] Cc: Forum Himpunan Ahli Geofisika Indonesia Subject: Re: [iagi-net-l] Re: [Forum-HAGI] [iagi-net-l] Jakarta Berpotensi Gempa Besar Nuhun pak Awang, Memang sedih juga hanya sedikit sekali sesar aktif yang bisa kita identifikasi : laju gesernya (secara geologis dan geodetis), perioda ulang gempa dan maksimum maknitudenya. Padahal bukti morphologis dan sejarah kegempaannya jelas. Sehingga memang hazard map (psha) yang dibuat masih jauh dari sempurna. Bekerjasama dengan beberapa instansi (LIPI dll) kami mulai mengamati sesar Baribis, walaupun belum mendapatkan hasil yang konklusif. Setuju sekali pak, bahwa low seismicity tidak berarti hilangnya potensi gempa, bahkan mungkin menjadi indikasi dari gap seismik. nuhun dan salam, irwan 2010/7/2 Awang Satyana <[email protected]>: > Pak Irwan, > > Di samping sesar-sesar di Jawa seperti yang sudah disebutkan di bawah, harus > ada juga yang meneliti Sesar Pamanukan-Cilacap yang segmen-segmennya a.l. > Sesar Kroya, Sesar Citanduy, Sesar Baribis. Sesar yang secara keseluruhan > dextral ini masih aktif dan beberapa titik episentrum gempa historis pernah > berada di atasnya. Kemudian, ujung sesar ini di wilayah Cilacap terbuka ke > wilayah selatan Cilacap yang kelihatannya sepi dari episentrum. Bila wilayah > sepi ini merupakan wilayah seismic gap zone, yang justru sedang membangun > gaya2 kompresinya untuk future EQ, dan Sesar Pamanukan-Cilacap benar aktif; > maka sesar ini akan seperti Sesar Opak yang menjadi accelerator pembawa > energi gempa dari episentrum Parangtritis ke wilayah rupture di Klaten pada > saat gempa Yogya terjadi 27 Mei 2006. > -- Irwan Meilano, Dr.sc Lecturer Geodesy Research Group Faculty of Earth Science and Technology Institut Teknologi Bandung (ITB) Ganesa 10, Bandung 40132,Indonesia [email protected] [email protected] -------------------------------------------------------------------------------- PP-IAGI 2008-2011: ketua umum: LAMBOK HUTASOIT, [email protected] sekjen: MOHAMMAD SYAIFUL, [email protected] * 2 sekretariat (Jkt & Bdg), 5 departemen, banyak biro... -------------------------------------------------------------------------------- Ayo siapkan diri....!!!!! 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