2010年玉树地震的构造环境、历史地震活动及其复发周期估计  

Study of Tectonics,Seismicity and Recurrence Interval of Yushu 2010 Earthquake,Qinghai Province

作　　者：任俊杰[1,2] 谢富仁[2] 刘冬英[2] 张爱武[3] 

机构地区：[1]中国地震局地质研究所,北京100029 [2]中国地震局地壳应力研究所,北京100085 [3]中国地震台网中心,北京100045

出　　处：《震灾防御技术》2010年第2期228-233,共6页Technology for Earthquake Disaster Prevention

基　　金：中国地震局地壳应力研究所中央级公益性科研院所基本科研业务专项(ZDJ2009-16)资助

摘　　要：2010年4月14日青海省玉树发生了7.1级地震,造成了严重的人员伤亡和重大的经济损失。发生该地震的甘孜-玉树断裂是川滇菱形块体的边界断裂,晚第四纪左旋走滑运动强烈。震中所处的甘孜-玉树断裂中段,震前历史地震活动与东南段相比较弱。本文利用玉树地震的基本参数资料和地震破裂反演结果,综合历史地震法和地震矩率法估算出了玉树地震的复发周期约为200年。The April 14,2010 Yushu earthquake（MS7.1） in Qinghai province,led to severe casualties and a huge economic loss.This earthquake occurred along the middle segment of Ganzi-Yushu fault zone,which is the important boundary fault of Sichuan-Yunnan block and have a strong dextral movement during late Quaternary.The middle segment has a lower historical seismicity than the southeastern segment.In this paper,we apply two methods of historical earthquakes and seismic moment rate,with the basis of parameters from Yushu earthquake and its inversion of earthquake rupture process,estimate the recurrence interval of large earthquakes by about 200 years on the middle segment of Ganzi-Yushu fault zone.

关 键 词：玉树地震 构造环境 复发周期 甘孜-玉树断裂带 

分 类 号：P315.2[天文地球—地震学]