摘要
通过对应变连续观测台站资料的处理以及对区域小震震源机制解的分析,研究了首都圈区域应变场的变化特征,发现文安5.1级地震前局部地区主应变方向与该区小震震源机制P轴方位出现偏转,变化基本同步。综合分析认为,文安地震前局部应变场的异常变化时间上从2006年4月开始,空间范围为200km。
The characteristics of regional strain field in the Capital Circle are studied by analyzing the strain data of continuous observation and the focal mechanism of small earthquakes. It shows that the direction of regional principal strain and azimuth of the principal compression stress axis turned synchronously before Wenan Ms5.1 earthquake since Apr. 2006 and the special scale of change was about 200 km.
出处
《大地测量与地球动力学》
CSCD
北大核心
2008年第1期28-31,71,共5页
Journal of Geodesy and Geodynamics
基金
地震科学联合基金(106013)
国家科技支撑计划子专题(2006BAC01B02-02-05)
关键词
应变参数
小震活动
震源机制
文安地震
P轴方位
strain parameter
activity of small earthquake
focal mechanism
Wenan earthquake
azimuth of P axis
