摘要
2011年,夏县地震台南山底短水准观测出现反向上升变化,辅助测项水位也出现同步上升变化,显示局部构造应力场由张性变为压性。为进一步研究构造应力场的变化,计算山西南部2007年以来ML≥3.0地震的震源机制解。结果显示,夏县区域内局部应力解表现为挤压环境。结合GPS数据资料,显示2011年夏县局部小区域内挤压活动明显,与南山底水准观测结果一致。
The reversed rising trend in Nanshandi short leveling observation data and in water level synchronously in 2011 show that the local tectonic stress field is changed from tension to compression.Focal mechanism solutions for ML≥3.0 earthquakes in southern Shanxi since 2007 are calculated to study the change of stress field.The stress solutions in local area of Xiaxian are showed as compression.According to GPS data,the extrusion activities in local area of Xiaxian in 2011 are obvious,which is consistent with the results of the Nanshandi level observation.
出处
《山西地震》
2018年第1期16-20,共5页
Earthquake Research in Shanxi
基金
山西省地震局科研项目(SBK-1415)
关键词
短水准测量
震源机制解
地下水位
构造应力场
Short leveling
Focal mechanism solution
Groundwater level
Tectonic stress field
