[S07-P] Poster

[S07-P-09] Strong Ground-Motion Simulation of 2016 Meinong Earthquake Using Empirical Green's Function Method

^○Ying-Chi Chen, Huey-Chu Huang (National Chung Cheng University, Chiayi, Taiwan)

The Meinong Earthquake (ML 6.6) occurring at 03:57 local time (UTC+8) on February 6, 2016 has struck the southern part of Taiwan. It is very important to understand the characteristics of strong ground motions for the earthquake. Therefore, we simulate the ground motions of the Meinong mainshock using the empirical Green's function method. We first choose one small event to be the empirical Green's function (EGF) and select some CWBSN (Central Weather Bureau Seismic Network) stations surrounding the source area. Next, we calculate the averaged spectral ratios of the Meinong mainshock relative to the EGF records and then get the seismic moment ratio between these two events and their corner frequencies by the source spectral ratio fitting method. We further estimate two important parameters, the ratios of fault dimensions (N) and stress drops (C) between the Meinong mainshock and the EGF event, which are needed for the empirical Green's function method. Finally, we simulate the waveforms of the mainshock at all stations used and then get the best fit source model by comparing the synthetic waveforms with the observed data. According to the simulated results, the size of the strong motion generation area is about 55 square kilometers. The rupture started at the right-bottom of the strong motion generation area and extended radially to the left-upper direction.