摘要
本文对华东地区的地震成组和迁移特征进行了详细分析。结果表明,1700年以来华东地区可划分为四个地震活跃幕,地震较完整的第二幕和第三幕内陆5级以上地震空间成组特征明显;郯庐带以西(包括郯庐带)和郯庐带以东地区4级以上地震时序上具有成组发生的特点;1900年以来郯庐带中南段5级以上地震具有自南向北定向迁移特征;1993年以来华东内陆郯庐带及周边200km范围内的ML4以上地震分三组活动且自西向东迁移。该研究结果有助于华东地区今后的地震趋势分析。
We analyzed in detail the characteristics of earthquake grouping and migration in eastern China. The results show that seismic activity in the region can be divided into four active episodes since 1700, the second and the third of which have obvious group charac- teristics for inland M〉5 earthquakes. M〉4 earthquakes in the west and east of the Tanlu fault belt usually occured temporally in groups, besides, those M〉5 earthquakes have ori- entational migration characteristics from south to north in middle and south segment of the belt since 1900, ML〉4 earthquakes can be divided into three groups and they migrate from west to east in the belt and 200 km around the belt since 1993. The study is helpful to seismic trend analysis in eastern China.
出处
《地震》
CSCD
北大核心
2015年第3期86-92,共7页
Earthquake
基金
中国地震局震情跟踪定向工作任务(2015010116)
地震科技星火计划(XH12027)资助
关键词
地震迁移
郯庐带
地震活跃幕
成组活动
华东地区
Seismic episode
Group activity
Earthquake migration, Tanlu fault belt
Eastern China
