Jawaban dari RDP tentang kemungkinan tsunami di Sulawesi: Tulisan saya kemaren mungkin kurang tepat karena ada artikel yg baru saja saya dapatkan bahwa tsunami di Makasar strait ternyata justru paling banyak terjadi menurut artikel yg abstracnya aku lampirkan dibawah. Tsunami ini akan lebih disebabkan oleh pergerakan patahan Palu-Koro (seperti yg saya tulis sebelumnya), namun juga akan dipicu oleh deepwater landslides (longsoran bawah laut) yg mekanismenya sdikit berbeda dengan tsunami di Aceh.
Menurut artike tsb pantai timur Kalimantan relatif lebih "aman" dengan 2 m tsunami dan mungkin akan sedikit diredam oleh lebarnya shelf (paparan), sedangkan pantai barat Sulawesi mungkin bisa 3 m tinggi gelombang tsunami. Bagi yg tertarik artikel bisa didonlod di http://www.geophysik.uni-muenchen.de/~wiwit/tsunami_mapaga.pdf (thanks to Wiwit P) RDP ========================================= The Makassar Strait Tsunamigenic Region, Indonesia G. S. PRASETYA,W. P. DE LANGE and T. R. HEALY Coastal Marine Group, Department of Earth Science, University of Waikato, Private Bag 3105, Hamilton, New Zealand (Accepted: 31 January 2001) Abstract. The Makassar Strait region has had the highest frequency of historical tsunami events for Indonesia. The strait has a seismic activity due to the convergence of four tectonic plates that produces a complex mixture of structures. The main tsunamigenic features in the Makassar Strait are the Palu-Koro and Pasternoster transform fault zones, which form the boundaries of the Makassar trough. Analysis of the seismicity, tectonics and historic tsunami events indicates that the two fault zones have different tsunami generating characteristics. The Palu-Koro fault zone involves shallow thrust earthquakes that generate tsunami that have magnitudes that are consistent with the earthquake magnitudes. The Pasternoster fault zone involves shallower strike-slip earthquakes that produce tsunami magnitudes larger than would normally be expected for the earthquake magnitude. The most likely cause for the increased tsunami energy is considered to be submarine landslides associated with the earthquakes. Earthquakes from both fault zones appear to cause subsidence of the west coast of Sulawesi Island. The available data were used to construct a tsunami hazard map which identifies the highest risk along the west coast of Sulawesi Island. The opposite side of the Makassar Strait has a lower risk because it is further from the historic tsunami source regions along the Sulawesi coast, and because the continental shelf dissipates tsunami wave energy. The greatest tsunami risk for the Makassar Strait is attributed to locally generated tsunami due to the very short travel times. Key words: historical tsunami, hazard mapping, tectonics, source mechanisms, mitigation. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com [Non-text portions of this message have been removed] ------------------------ Yahoo! Groups Sponsor --------------------~--> Give underprivileged students the materials they need to learn. Bring education to life by funding a specific classroom project. http://us.click.yahoo.com/4F6XtA/_WnJAA/E2hLAA/BRUplB/TM --------------------------------------------------------------------~-> *************************************************************************** Berdikusi dg Santun & Elegan, dg Semangat Persahabatan. Menuju Indonesia yg Lebih Baik, in Commonality & Shared Destiny. www.ppi-india.uni.cc *************************************************************************** __________________________________________________________________________ Mohon Perhatian: 1. Harap tdk. memposting/reply yg menyinggung SARA (kecuali sbg otokritik) 2. Pesan yg akan direply harap dihapus, kecuali yg akan dikomentari. 3. Lihat arsip sebelumnya, www.ppi-india.da.ru; 4. Forum IT PPI-India: http://www.ppiindia.shyper.com/itforum/ 5. Satu email perhari: [EMAIL PROTECTED] 6. No-email/web only: [EMAIL PROTECTED] 7. kembali menerima email: [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/ppiindia/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
