Preliminary result for rupture process of Apr. 20, 2013, Lushan Earthquake, Sichuan, China
Preliminary result for rupture process of Apr. 20, 2013, Lushan Earthquake, Sichuan, China
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2013年4月20日四川芦山地震破裂过程初步结果
DOI：
10.6038/cjg20130436
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发表时间：
2013-04-01
影响因子：
1.4
通讯作者：
Yao Zhen-Xing
中科院分区：
文献类型：
--
作者：
Wang Wei-Min;Hao Jin-Lai;Yao Zhen-Xing
利用远场体波记录，采用有限断层模型方法对2013年4月20日芦山地震的破裂过程进行了快速估计。然后根据该地震的破裂断层模型计算出预测的震线图。结果表明，此次地震为一次M(w)6.7级逆冲地震，发生在龙门山断裂带南段，最大滑动量为159 cm。根据预测的地震地图，震源区烈度应达到中国地震烈度等级的VIII-IX级。芦山地震的逆冲机制与汶川地震相似。本次地震破裂发生在龙门山断裂带南段，该处因汶川地震导致库仑应力增大。这一事件可能是由汶川地震引发的。从宏观上看，本次地震可以认为是汶川地震的一次延迟性强余震。
The rupture process of the 20, Apr. 2013, Lushan earthquake was fast estimated by finite fault model method using far field body waveform records. The predicted shakemap is subsequently calculated based on rupture fault model of this earthquake. Results show that the earthquake is an M(w)6.7 thrusting event which occurred on the south part of Longmen Shan fault zone with 159 cm largest slip. By the predicted shakemap, the intensity of epicenter region should reached VIII-IX on Chinese seismic intensity scale. The thrusting mechanism of Lushan earthquake is similar to that of Wenchuan earthquake. The earthquake rupture of this event occurred on the southern section of Longmen Shan fault where shows increase of Coulomb stress caused by the Wenchuan earthquake. This event may be triggered by the Wenchuan earthquake. On the view of macroscopic, this earthquake can be considered as an delayed strong aftershock of Wenchuan earthquake.