摘要
本文通过对山东地区及其海域的历史地震(Ms≥5)和近代小震活动的分析,认为该区的历史地震活动,自1688年以来存在三个M≥5级地震活动空段(菏泽—临沂,聊城—惠民,渤海—威海);而1960年以来,该区ML≥4.5级地震具有8年的活跃时间段的特点。并得出山东地区及其海域ML≥4.5级地震活动还将持续3年,从近期小震活动研究结果表明,渤海海域及其邻区存在空区和小震活动条带。并得出该区存在低b值,应变释放加速等异常特点。
On the basis of the analysis of historical and recent seismic activity in Shandong and its sea areas we conclude the following results. Study area exists three active segments (M≥5) since 1968 (Heze-Linyi, Liaocheng-Huimin,Bohai-Weihai) .The area have active period of eight years since 1960 from which the seismic activity will last three years in Shandong and its sea area. According to the analysis of small earthquakes activity in recent years the areas exist seismic gaps and small earthquake belt from which low b values and strain release acceleration are obtained.
出处
《地震研究》
CSCD
北大核心
1996年第2期140-145,共6页
Journal of Seismological Research
关键词
地震预报
地震活动性
地震空区
山东
earthquake prediction
seismic activity
historical earthquake
seismic gap
Shandong