河南及邻区M_L≥4.7地震前b值c值d值综合异常识别

Synthetic Anomaly Recognition from Values of b,c,d before Earthquakes of M_L≥4.7 in Henan Province and Its Neighbor Region

从ML≥4.7地震前震中附近地区中小地震活动呈现增强过程及地震活动参数表现的异常现象出发,对河南及邻区1970年至今ML≥4.7地震前b值、c值、d值的综合异常进行了分析,认为其对提高地震分析预报的可信度,较好地避免单方法预报的虚报、漏报有一定的效果。

Based on the process of increasing activities of moderate and small earthquakes and the anomaly phenomenon of seismicity parameters near the epicenter area before ML≥4.7 earthquakes, synthetic anomaly of values of b,c,d in Henan province and its neighbor region before ML≥4.7 earthquakes from 1970 to the present is analyzed. It is thought that these values have some effect on improving reliability of earthquake analysis and prediction, avoiding false prediction and prediction missing brought by single method.