摘要
本文从较大时空范围研究了1989年大同—阳高6.1级地震的地震活动性背景,认为大同—阳高地震不是一次孤立的地震事件,是大同盆地历史6级以上地震活动的继续和必然。在时间进程中它们受华北地震区和山西地震带强震活动周期的制约,空间上与北三省交汇区中强地震成丛活动密切相关。大同—阳高6.1级、5.8级地震以及此期间的侯马4.9级、忻州5.1级地震是山西地震带中强地震即将活跃的一个迹象,也是华北区域应力场增强的结果。
Based on the longer time and larger region,the authors studied the seismicity background of Datong-Yanggao earthquake with M=6.1 in 1989. The conclusion is that the earthquake was not a isolated one, it is the continuation and inevitable outcome of the seismicity with M>6 in Datong basin. The seismicity is restricted by the active period of strong earthquakes in North China seismic region and Shanxi seismic zone from the point of temporal sequence. And the seismicity is related to the clustred activity of moderate and strong earthquakes in the regions, including three northern provinces from the point of spatial distribution. Datong-Yanggao earthquakes with M =6.1 and 5.8 as well as Houma earthquake with M= 4.9 and Xinzhou earthquake with M=5.1 during the former period are all the results of the increase of regional stress field in North China and they are also a kind of precursors that the moderate and strong events will be activated in Shanxi seismic zone.
出处
《地震》
CSCD
北大核心
1994年第5期71-77,共7页
Earthquake
关键词
大同-阳高
地震活动性
震级
Datong-Yanggao
seismic-activity
background
