李丽^1,,
AdhikariLok Bijaya²,
李纲³,
高福旺³
1. 北京国家地球观象台, 中国地震局地球物理研究所, 北京 100081
2. 国家地震中心, 尼泊尔矿产与地质局, 加德满都
3. 地震预报部, 中国地震台网中心, 北京 100045

基金项目: 国家自然科学基金（40974022）和十一五国家科技专项"汶川地震断裂带科学钻探项目"资助


详细信息

作者简介: 李丽, 女, 1969年生, 研究员, 主要从事地震观测技术研究. E-mail: lilygrace@cea-igp.ac.cn

中图分类号: P315

收稿日期:2018-03-06
修回日期:2018-04-20
上线日期:2018-05-05

Characteristics of temporal-spatial distribution of the aftershocks of the 2008 M_S8.0 Wenchuan Earthquake

LI Li^1,,
Adhikari Lok Bijaya²,
LI Gang³,
GAO FuWang³
1. Beijing National Earth Observatory, Institute of Geophysics, China Earthquake Administration, Beijing 100081, China
2. National Earthquake Center, Department of Mines and Geology, Kathmandu, Nepal
3. Earthquake Prediction Division, China Earthquake Networks Center, Beijing 100045, China


MSC: P315

--> Received Date: 06 March 2018
Revised Date: 20 April 2018
Available Online: 05 May 2018


摘要
摘要:2008年5月12日汶川M_S8.0地震主震发生后至2012年5月12日，我国地震台网在龙门山断裂区域内（102°E—105°E，30°N—34°N）共记录93837个地震事件，其中80995次事件含有深度信息.本文以台网地震目录为主要研究对象，分析了汶川地震余震序列的时空分布与演化特征.与构造活动密切相关的余震频次-震级关系变化显示，与主震断裂活动直接相关的余震活动在主震后4个月内基本结束.余震释放能量的空间分布及演化分析显示，在主震后6~24 h即有可能捕获未来余震区的大致展布乃至余震发展趋势.
关键词: 余震/
能量释放/
汶川8.0级地震/
时空扫描

Abstract:The seismograph network in China recorded 93837 seismic events in the area of (102°E—105°E, 30°N—34°N) after the 12 May 2008 Wenchuan M_S8.0 earthquake within 4 years after the main shock, of which 80995 events were located with focal depth. Based on the network catalogue, the temporal and spatial distribution of the aftershocks was analyzed. The frequency-magnitude relationship of the aftershocks shows that the activity of aftershocks turned to be weak in 4 months after the main shock. The spatial distribution of the energy released by aftershocks shows that even within 6~24 hours after the main shock, the tendency of development of aftershocks in a long time could be captured.
Key words:Aftershock/
Energy released by earthquake/
M_S8.0 Wenchuan earthquake/
Temporal and spatial scanning



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