摘要
2008年5月12日14时28分4秒,四川省汶川县发生MS8.0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。
On the 12th of May,2008, a devastating MS 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.
出处
《地震地质》
EI
CSCD
北大核心
2008年第2期359-362,共4页
Seismology and Geology
关键词
汶川MS8.0地震
地表破裂带
同震位移
逆冲断层
the MS8.0 Wenchuan Earthquake, surface rupture zone,co-seismic displacement, vertical fault
