日本海西部及中国东部地区深源地震在华北、东北有感的研究  

STUDY OF FEELING IN THE AREA OF THE NORTH AND NORTHEAST CHINA DUE TO DEEP EARTHQAKES OCCURRED AT THE WEST JAPAN SEA AND THE EAST CHINA

作　　者：高山泰[1] 于岫嵋[1] 杨清福[1] 郑雅琴[1] 

机构地区：[1]吉林省地震局,吉林长春130022

出　　处：《东北地震研究》2002年第1期13-23,共11页Seismological Research of Northeast China

摘　　要：本世纪以来 ,在日本海西部和中国东部地区深震带发生三次有感深源强震。震后调查发现深震在震中附近无感 ,而在远离震中区、偏离板块俯冲方向的东北南部和大华北地区强烈有感 ,且有感范围广、烈度低、衰减慢、振动中心不明确、没有破坏性等。研究表明有感范围严格受郯庐构造带和地幔上拱区控制 ,微观震中与有感范围的几何中心 (即宏观震中 )相距 4 30～ 1 0 2 0km ,两者连线偏离板块插入方向约 4 0°,认为这是由太平洋板块俯冲增强时 ,深震带上的张应力除以 2 5 5°走向向SWW方向平推外 ,同时又以大于 4 5°的仰角上撅造成的。从深震活动到东部地区上地幔隆起 ,再到郯庐带活动 ,都是由太平洋板块插入、俯冲、上撅、顶托同一动力学过程形成。There had been strong felt deep earthquakes happened in the west Japan Sea and the East China since 20 th century The survey suggested that three deep earthquakes with wide ranges low intensities slow attenuating,unclear vibration center and features of un destroy were strongly felt in the area of the Northeast and North China,but not felt in the epicenter Its felt ranges were strictly controlled by the Tancheng Lujiang fault belt and the mantle uplift The distance between micro epicenter and macro epicenter were 430～1020km The direction of the connecting line between micro epicenter and macro epicenter deviated about 40° from the downgoing direction of the Western Pacific ocen,which was caused by strong stress of pushing horizontally in 255° to SSW,arching with 45° angle of elevation.All of three deep earthquakes along with mantle uplift of the East China and activity of the Tancheng Lujiang fault belt were due to the downgoing of the Western Pacific ocean plate

关 键 词：日本海 中国东部地区 深源地震 有感范围 宏观震中 地幔上隆 动力源 华北地区 东北地区 

分 类 号：P315.3[天文地球—地震学]