PROBABILISTIC SEISMIC HAZARD MAPPING FOR SUMATRA ISLAND

摘要: Probabilistic seismic hazard analysis (PSHA) for Sumatra Island considering 3-dimensional source zones is presented in this paper. In analysis, characterization of both subduction sources the west and shallow crustal faults Fault Zones (SFZ) investigated. The presents probability level 10% 2% exceedance 50 years. PSHA was conducted at a grid spacing 0.5 degree, resulted each point with corresponding uniform spectra level. Seismic maps produced from consist two level, three spectral values, that PBA, short period (T=0.2 sec), long (T=1.0 respectively. map years study shows some noticeable differences compared to current Indonesian map, particularly area along SFZ. De-aggregation suggest controlling earthquakes target input motion site-response analyses various site-class. methodology probabilistic mapping ground has been developed could be extended further other islands Indonesia.