Simulation of Source Functions in Taiwan Area

Abstract:

Since the Taiwan area is situated on the subduction zone, where the Philippine Sea Plate is subducting underneath the Eurasian Plate, much attention is focused on seismic risk mitigation. The purpose of this paper is to study the potential of earthquakes hazard in the Taiwan area, using the seismic acceleration data collected by the Central Weather Bureau from 1993 to 2012. The source time functions for 32 events have been calculated by using the attenuation equation and the Q-structures. These source time functions can be classified into 3 groups. Type A, B, and C indicates subduction, normal and strike slip faults respectively. The source time functions of type A are almost located in the off-shore of the eastern Taiwan. Most of the type C are located in the well known faults (ex. ChelungPu fault) area. Type B are located in the volcano area of northern Taiwan.