摘要
根据加卸载响应比理论,对福建省5个水位观测资料进行加卸载响应比计算,发现在多次福建4级地震前出现多井同步异常,在形态上表现为高值突跳,时间上表现为短期或短临异常,空间上与地震所处的构造部位有关。说明地震前近源区含水层系统确实处于临近失稳状态,水位固体潮加卸载响应比可能捕捉到4级以上地震前应力失稳的过程。
According to the theory of loading/unloading response ratio, the earth tidal loading/unloading response ratio of underground water level data from five water-wells was calculated in Fujian Province. It showed that the abnormal phenomenon of several water- wells appeared before ML4.0 earthquakes in Fujian Province, which reflected the shape above the average value, short-impeding anomalies and seismic tectonic position related. It concluded that near source rock aquifer system is in a near instable state before the earthquake, and the earth tidal loading/unloading response ratio may get the stress instability process before ML4.0 earthquake.
出处
《内陆地震》
2013年第3期212-221,共10页
Inland Earthquake
关键词
福建
地震前兆
水位
固体潮
加卸载响应比
同步异常
Fujian
Earthquake precursor
Groundwater level
Earth tide
Loading/unloading response ratio
Synchronism anomaly
