辽宁省及邻近地区主要地震构造及其危险性判定  

Judgement for the Main Seismic Structures and Their Seismic Risk Classifications in Liaoning Province and Its Adjacent Area

作　　者：万波[1] 靳超宇[1] 索锐[1] 

机构地区：[1]辽宁省地震局,辽宁沈阳110034

出　　处：《防灾减灾学报》2017年第1期1-11,共11页Journal of Disaster Prevention And Reduction

基　　金：辽宁省本级项目"辽宁沿海地区断裂构造勘查及地震区划"项目(2010);"辽宁省地震构造环境与强震风险评估"项目(2013)

摘　　要：辽宁省及邻近地区的地震活动主要集中在海城地震区、下辽河—辽东湾、鸭绿江口和辽东半岛西侧的金州断裂沿线,地震活动与地质构造之间具有高度的相关性,明显受到了NE—NNE向和NW向两组构造的制约,构造交会部位亦即地震活动条带的结点是破坏性地震的多发区。研究表明,金州断裂盖州北—鞍山段、海城河断裂、鸭绿江断裂西支东港以南段等6条地震构造(段)是区内危险性最高的地震构造,按照4级划分原则,可将其确定为高危险等级;金州断裂金州—普兰店段、郯庐断裂带渤中北—辽东湾段、依兰—伊通断裂铁岭—开原北段等10条地震构造(段)确定为较高危险等级;郯庐断裂带下辽河段、医巫闾山西侧断裂等4条地震构造(段)危险等级一般,其它地震构造(段)的危险性较低。Seismic activities in the area of Liaoning province and its adjacent area mainly concentrate upon the regions such as Haicheng, Lower Liaohe -- Liaodong gulf, the yalu river mouth and the western part of Liaodong Peninsula along the Jinzhou fault zone, etc. It has a high degree of correlation seismic activity and with seismic activity and geologic structures, earthquakes are tied by NE -- NNE and NW trend structures, destructive earthquakes occurred frequently at the intersection parts of the two trend structures. The result shows that in this area, 6 structures （or segments） such as the north of Gaizhou -- Anshan segment of Jinzhou fault zone etc. which are the highest dangerous degree structures （ or segments ）, 10 seismic structural segments such as Jinzhou--Pulandian segment of Jinzhou fault zone etc. which are confirmed to be higher degree, such as Xialiaohe segment of Tanlu fault zone etc. which are confirmed to be common degree, and others are lower degree.

关 键 词：辽宁省及邻近地区 地震活动 地震构造 断裂 盆地 活动性 地震危险性 

分 类 号：P315.2[天文地球—地震学]