摘要
以山西省2001年以来,21个台站数字化地震观测资料为基础,根据地震发生的断裂力学模式和震源谱理论,计算出了山西4个地震集中区的构造环境剪应力值,并对应力场的变化情况进行了分析研究。结果表明,在断陷盆地内或边缘地区发生4级以上地震前,一些地震集中分布区显示存在一定的高环境应力,为我们震情的短期跟踪提供了新的参考依据。
Based on digital earthquake observation data of 21 stations since 2001 in Shanxi Province, shear stresses of tectonic environments of 4 earthquake centralized areas in Shanxi are calculated, according to fault mechanics model of earthquake generation and source spectrum theory. The variety of stress field is also analyzed. The results indicate that before occurring of earthquakes of ML〉4 in fault basin or edge area, there are some high environment stress in some earthquake centralized areas, which provide new reference for tracing short-term, seismic situation.
出处
《山西地震》
2008年第2期1-3,8,共4页
Earthquake Research in Shanxi
基金
山西省地震局科研项目(SBK-0703)
关键词
数字化地震资料
剪应力场
山西地区
Digital earthquake data
Shearing stress field
Shanxi area
