RUPTURE OF THE MS 8.0 WENCHUAN EARTHQUAKE

SEISMOLOGY AND GEOLOGY ›› 2008, Vol. 30 ›› Issue (2): 359-362.

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RUPTURE OF THE M_S 8.0 WENCHUAN EARTHQUAKE

HE Hong-lin¹, SUN Zhao-min², WANG Shi-yuan³, WANG Ji-qiang², DONG Shao-peng¹

1. Institute of Geology, China Earthquake Administration, Beijing 100029, China;
2. Earthquake Administration of Shandong Province, Jinan 250014, China;
3. Earthquake Administration of Sichuan Province, Chengdu 100717, China

Received:2008-06-10 Revised:2008-06-11 Online:2008-06-20 Published:2009-08-16

汶川M_S8.0地震地表破裂带

何宏林¹, 孙昭民², 王世元³, 王纪强², 董绍鹏¹

1. 中国地震局地质研究所, 北京, 100029;
2. 山东省地震局, 济南, 250014;
3. 四川省地震局, 成都, 100717

作者简介:何宏林,男,1964年生,1985年毕业于北京大学地质系,1988年在中国科学技术大学研究生院获得硕士学位,2000年在东京大学获得博士学位,研究员,主要研究方向为地震地质与构造地貌,电话:86(10)62009125,E-mail:honglinhe123@vip.sina.com.

Abstract

Abstract: On the 12th of May,2008,a devastating M_S 8.0 earthquake struck Wenchuan County,Sichuan Province.The earthquake rupture extends about 200km,and the maximum co-seismic strike-slip displacement and vertical displacement are(4.8±0.2)m and(5±0.2)m,respectively.Only one fault plane(N32°E/NW∠76°)has been found on the southern section of the rupture.The high dip of the fault plane and high angle stria on the fault plane show that the fault is dominated by reverse motion,with a small amount of right-lateral strike-slip component in this segment.

Key words: the M_S 8.0 Wenchuan Earthquake, surface rupture zone, co-seismic displacement, vertical fault

摘要： 2008年5月12日14时28分4秒,四川省汶川县发生M_S8.0大地震。发震断裂为龙门山断裂带中的映秀-北川断裂。该次地震的地表破裂可分成2条,分别出现在龙门山断裂带中的映秀-北川断裂、彭县-灌县断裂上,前者破裂长度约200km,后者破裂长度约80km。本次地震的最大垂直和右旋水平同震位移出现在都江堰市虹口乡附近的映秀-北川断裂上,分别为(5±0.2)m和(4.8±0.2)m。破裂带南段出露的地表断层产状为N32°E/NW∠76°,其上的侧伏角为S75°～80°W,反映了该次地震在南段以逆冲运动为主,兼有少量的右旋走滑分量。

关键词: 汶川M_S8.0地震, 地表破裂带, 同震位移, 逆冲断层

CLC Number:

P315.2

HE Hong-lin, SUN Zhao-min, WANG Shi-yuan, WANG Ji-qiang, DONG Shao-peng. RUPTURE OF THE M_S 8.0 WENCHUAN EARTHQUAKE[J]. SEISMOLOGY AND GEOLOGY, 2008, 30(2): 359-362.

何宏林, 孙昭民, 王世元, 王纪强, 董绍鹏. 汶川M_S8.0地震地表破裂带[J]. 地震地质, 2008, 30(2): 359-362.

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RUPTURE OF THE M_S 8.0 WENCHUAN EARTHQUAKE

汶川M_S8.0地震地表破裂带

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RUPTURE OF THE MS 8.0 WENCHUAN EARTHQUAKE

汶川MS8.0地震地表破裂带

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RUPTURE OF THE M_S 8.0 WENCHUAN EARTHQUAKE

汶川M_S8.0地震地表破裂带