龙门山中央断裂分段地震震级及强震复发周期的预测  

Estimation of earthquake magnitude and recurrence in terval of lager earthquake in the Yingxiu-Beichuan fault

作　　者：闫亮[1] 李勇[1] 周荣军[2] 刘宇平[3] 张毅[1] 陈浩[1] 乔宝成[1] 马博琳[1] 

机构地区：[1]油气藏地质及开发工程国家重点实验室(成都理工大学),成都610059 [2]四川省地震局工程地震研究院,成都610041 [3]中国地质调查局成都地质矿产研究所,成都610082

出　　处：《成都理工大学学报（自然科学版）》2011年第1期29-37,共9页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家自然科学基金资助项目(49803013;40372084;40841010;40972083);中国地质调查局计划项目(1212010918010)

摘　　要：汶川Ms8.0级地震发生后,对于龙门山发震构造带长期地震危险性评估的研究越来越受到了关注,以定量的、概率性的评估强活动断裂段的地震危险性也成为了近年来国际上研究长期地震预测的方向之一。作者以前人对龙门山中央断裂(映秀-北川断裂)活动构造的研究成果和汶川地震后地表特征的实测数据为依据,在对其进行活动分段的基础上,通过震级-标量参数经验关系式和强震重复间隔计算方法对中央断裂未来地震的可能震级及强震复发周期进行了定量计算,预估了中央断裂的分段地震震级、级联破裂地震震级以及龙门山构造带的强震复发周期。After the Ms8.0 great earthquake occurred in the Longmen Mountains on May 12th,2008,more and more geologists years focus attemtion on the seismic risk evaluation in the Longmen Mountains.In recent,to use quantitative and probability mathematical methods to assess the seismic risk in the active faults has been become a main research direction in the world.Based on studying the previous research achievements in active tectonic of the Yingxiu-Beichuan fault in the Longmen Mountains,measuring the offset dates of the surface ruptures of the Wenchuan earthquake,and making activity segmentations to the Yingxiu-Beichuan fault,this paper uses the calculation methods for earthquake magnitude to assess the magnitudes of the coming earthquakes in the Yingxiu-Beichuan fault and estimate the recurrence intervals of the strong earthquakes in Longmen Mountains.The results show that the estimations of the magnitudes are 7.15±0.35 in the Xuankou-Xiaoyudong segmentation,7.36±0.33 in the Xiaoyudong-Leigu segmentation,7.30±0.39 in the Leigu-Shikan segmentation,7.62±0.41 in the Yingxiu-Beichuan fault belt for the coming earthquakes,and the estimation of recurrence interval of the strong earthquakes is 1310~3932 a in Longmen Mountains.

关 键 词：汶川地震 映秀-北川断裂 活动分段特征 地震震级 强震复发周期 

分 类 号：P315.2[天文地球—地震学]