福建内陆中强震前b值空间扫描分析

Spatial Scanning Analysis of b-value before Medium-strong Earthquakes in Fujian Province

选取b值空间扫描的起算震级,对福建内陆中强震前b值空间进行扫描分析,结果显示:绝大多数中强震前,在震中或附近会出现b值空间扫描异常,且多数中强震震前b值异常一直持续到发震,异常持续时间与异常范围1~2年内发生的中强震次数有关;一般情况下,异常范围内发生的中强震次数越多,震前异常持续时间越长。

The starting magnitude of b-value spatial scanning is selected to scan and analyze b-value space before medium-strong earthquakes in inland Fujian province.The results show that before most medium-strong earthquakes,there will be b-value spatial scanning anomaly at or near the epicenter,and the b-value anomaly lasts until the onset of most moderate and strong earthquakes,and the duration of the anomaly is related to the number of medium-strong earthquakes within the anomaly range of 1~2 years.In general,the more medium-strong earthquakes occur in the anomaly range,the longer the duration of the anomaly before the earthquake.