New USGS Southeast Asia Seismic Hazard Maps

Abstract eng:
The U.S. Geological Survey (USGS) Southeast Asia Seismic Hazard Project originated in response to the 26 December 2004 Sumatra earthquake (M9.2) and the resulting tsunami that caused significant casualties and economic losses in Indonesia, Thailand, Malaysia, India, Sri Lanka, and the Maldives. Hazard models and maps were produced, with input from several international science organizations, by the USGS in Golden, Colo., for the region encompassing Thailand, Malaysia, Singapore and eastern Indonesia using the methodologies established for producing the United States national seismic hazard maps. A new subduction zone model was developed that considers historic seismicity, paleoseismic investigations, geodetic data, and ground motion studies. Seismicity catalogs and hazard models were updated to 2007. Fault maps were compiled and fault parameters were discussed at workshops held in Thailand, Malaysia, and Indonesia. In addition, geology and shear-wave velocity maps and a seismic risk analysis were produced for a region surrounding Padang, Indonesia.

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