Near-field Simulation of Ground Motions of ۱۶ April ۲۰۱۳ Iran-Pakistan Border Earthquake Using Semi-Empirical Approach

The ۷.۸ M earthquake occurred in south east Iran on ۱۶ April ۲۰۱۳ at ۱۰:۴۴:۲۰ UTC. This earthquake was the most massive earthquake in last ۵۰ years, with tremors felt across Pakistan, Oman and UAE. According to BHRC (Iranian Building and Housing Research Center) report, this event was recorded by ۳۳ digital accelerographs in Iran Strong Ground Motion Network. The peak acceleration was recorded in Sabz Gazz seismic station. This study presents simulation of near-field ground motions of the ۲۰۱۳ Iran earthquake. For this purpose, five seismic stations are selected to simulate ground motions using semi-empirical approach. Hamzehloo and Mahood (۲۰۱۲) attenuation relationship for south east Iran is used to obtain acceleration waveformenvelope function. Acomparison is done on characteristics of observed and simulated ground motions. The simulated results are satisfactory at many of the seismic stations. It is concluded that higher frequencies (۲-۱۰ Hz) of simulated ground motions match with observed ground motions.

Keywords:

Simulated groundmotion , Envelope function , Attenuation relationship , Semi-empirical approach