一次显著的远场水位短临异常

Significant short-term anomaly of water level in far-field

摘要:

2012年2月2日辽宁营口发生了M4.3和M4.1地震。震前距震中468km的河北省黄骅井水位出现了显著的短临下降异常变化，异常过程演化与震级较小的营口地震序列发展具有完整的可对比性。本文从地质、构造、震源机制等方面，分析判断该异常与构造活动应有一定的相关性，是一次显著的远场水位短临异常。

Abstract:

The Yingkou M4. 3 and M4. 1 earthquakes in Liaoning Province occurred on February 2，2012． Before the earthquake，the water level of Huanghua well in Hebei Province with the epicenter distance of 468km had a significant short-term decreasing anomaly． The abnormal process and Yingkou earthquake sequence of smaller magnitude make a complete comparison． The paper analyzes the anomaly phenomenon in terms of tectonic structure，dynamics environment and focal mechanism． The result shows that there is a certain correlation between tectonic activity and the anomaly，which can be taken as a significant short-term anomaly in far-field．