收稿日期: 2014-04-14
修回日期: 2014-05-04
网络出版日期: 2015-03-15
基金资助
国家重点基础研究发展计划(2014CB845906)和国家自然科学基金(41274103)资助
Quantitative analysis of Lushan earthquake background activity with earthquake multi-parameters
Received date: 2014-04-14
Revised date: 2014-05-04
Online published: 2015-03-15
王静静 , 张怀 , 庞亚瑾 , 石耀霖 . 从多地震活动参数角度定量分析芦山地震的背景活动性[J]. 中国科学院大学学报, 2015 , 32(2) : 235 -242 . DOI: 10.7523/j.issn.2095-6134.2015.02.013
The Ms7.0 Lushan earthquake occurred in the southern part of Longmenshan fault on 20 April 2013. We calculate several kinds of seismic activity parameters to analyze the background activity of Lushan earthquake and relate them with Wenchuan earthquake. The results show that 1) there were only three great earthquakes above M6.0 occurring in the southern part of Longmenshan fault, which indicates existence of earthquake gap in historic earthquake background; 2) based on the values of a, the background earthquake activity was high during the 30 years before Lushan earthquake; and 3) the spatial difference in b-value before and after Wenchuan earthquake shows decrease of b-value and increase of stress only in part of southern Longmenshan fault zone while Lushan earthquake occurred in the region where b-value decreased apparently.
Key words： Lushan earthquake; earthquake activity; a-value; b-value
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