Fast inversion of rupture process of the 14 April 2010 Yushu,Qinghai,earthquake  

作　　者：Yong Zhang Lisheng Xu Yun-tai Chen 

机构地区：[1]Institute of Geophysics, China Earthquake Administration,Beijing 100081, China [2]School of Earth and Space Sciences, Peking University, Beijing 100871, China

出　　处：《Earthquake Science》2010年第3期201-204,共4页地震学报（英文版）

基　　金：supported by China Postdoctoral Science Foundation funded project (20080440435);the project (DQJB09B06) from Institute of Geophysics (IGP),China Earthquake Administration (CEA). Contribution No. is 10FE3002, IGP-CEA

摘　　要：Four results of the rupture process of 14 April 2010 Yushu, Qinghai, earthquake, obtained by inverting the broadband seismic data of Global Seismographic Network （GSN） based on the inversion method of earthquake rupture process, were compared and discussed. It is found that the Yushu earthquake has several basic characteristics as follows： 1 There exist two principal sub-events which correspond to two slip-concentrated patches being located near the hypocenter and to the southeast of the epicenter. The rupture of the slip-concentrated patch to the southeast of the epicenter broke though the ground surface; 2 The peak slip and peak slip-rate are about 2.1 m and 1.1 m/s, respectively, indicating that the Yushu earthquake is an event with large slip-rate on the fault plane; 3 Overall the Yushu earthquake is a unilateral rupture event with the rupture mainly propagating southeastward. The strong focusing of the seismic energy in the southeast of the epicenter due to the ＂seismic Doppler effect＂ reasonably accounts for the tremendous damage in the Yushu city.Four results of the rupture process of 14 April 2010 Yushu, Qinghai, earthquake, obtained by inverting the broadband seismic data of Global Seismographic Network （GSN） based on the inversion method of earthquake rupture process, were compared and discussed. It is found that the Yushu earthquake has several basic characteristics as follows： 1 There exist two principal sub-events which correspond to two slip-concentrated patches being located near the hypocenter and to the southeast of the epicenter. The rupture of the slip-concentrated patch to the southeast of the epicenter broke though the ground surface; 2 The peak slip and peak slip-rate are about 2.1 m and 1.1 m/s, respectively, indicating that the Yushu earthquake is an event with large slip-rate on the fault plane; 3 Overall the Yushu earthquake is a unilateral rupture event with the rupture mainly propagating southeastward. The strong focusing of the seismic energy in the southeast of the epicenter due to the ＂seismic Doppler effect＂ reasonably accounts for the tremendous damage in the Yushu city.

关 键 词：earthquake rupture process fast inversion 2010 Yushu  Qinghai  earthquake earthquake emergency response 

分 类 号：P315.32[天文地球—地震学]