Introduction to the Lushan, Sichuan M7.0 earthquake on 20 April 2013
Introduction to the Lushan, Sichuan M7.0 earthquake on 20 April 2013
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DOI：
10.6038/cjg20130434
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发表时间：
2013-04-01
影响因子：
1.4
通讯作者：
Du Fang
中科院分区：
文献类型：
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作者：
Liu Jie;Yi Gui-Xi;Du Fang
2013年4月20日四川庐山7.0级地震发生在龙门山断裂带南段。其震源机制为逆断层作用。主震后3天内共记录到余震3000余次，其中5级4次，最大余震为5级。4震级：2013年4月21日17时05分，庐山-琼莱交界。长轴距余震区约45公里，短轴距余震区约20公里。2008年5月12日庐山7.0级地震和汶川8.0级地震均发生在龙门山断裂带上，汶川地震发生在中北段。两个余震区之间有大约45公里长的间隔。庐山7.0级地震并不是2008年汶川8.0级地震的余震，尽管这两次地震之间存在着密切的联系。
The Lushan, Sichuan M7.0 earthquake on 20 April 2013 occurred on the southern segment of the Longmen Shan fault zone. Its focal mechanism is reverse faulting. Over 3000 aftershocks in 3 days after the mainshock have been recorded, of which 4 events are M5 and the maximal aftershock is the M5. 4 shock at 17 : 05 on 21 April, 2013 on the Lushan-Qionglai border. The long axis is about 45 km and the short axis about 20 km of the aftershock area. Both the Lushan M7.0 earthquake and Wenchuan M8.0 earthquake on 12 May, 2008 took place on the Longmen Shan fault zone, and the Wenchuan event occurred on the central-northern segments. There is about 45 km-long interval between the two aftershock areas. The Lushan M7.0 earthquake is not an aftershock of the 2008 Wenchuan M8.0 earthquake, though there is a close relationship between the two events.