Tsunami Hazard Mitigation at Palabuhanratu, Indonesia

Yuichiro Tanioka, Hamzah Latief, Haris Sunendar, Aditya Riadi Gusman, Shunichi Koshimura

Journal of Disaster Research 7 (1), 19-25

Abstract

Several large earthquakes have recently occurred along the Sumatra-Java subduction zone, the 2004 great Sumatra-Andaman earthquake, the 2005 great Nias earthquake, the 2006 West Java tsunami earth- quake, the 2007 great Bengkulu earthquake, and the 2010 Mentawai tsunami earthquakes. Serious tsunami disasters were caused by the great underthrust earthquakes which ruptured the plate interface near the trench such as the 2004 Sumatra-Andaman, 2006 West Java, 2010 Mentawai earthquakes. At Palabuhanratu, maximum tsunami height distribution and inundation areas were computed from expected fault models located near the Java trench. The results shows that the most populated areas of Palabuhanratu would be severely damaged by the expected tsunami caused by the fault model of Mw 8.5. After discussing tsunami disaster mitigation measures with the local government, the result of tsunami inundation area in this study were used to decide tsunami evacuation areas and evacuation routes. The local government also installed tsunami evacuation sign boards near the coast.

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