河南及邻区中等地震前地震释放应变能速率B值时空演化

Characteristics of the temporal and spatial evolution of B-values of releasing stress-strain energy speed before moderate earthquakes in Henan Province and its neighboring areas

对河南及邻区中等地震前地震释放应变能速率B值进行时空扫描,通过对1970年至今所有ML≥4 7级地震前B值的时空演化的对比分析得出以下结论:中等地震前B值出现高值异常,且在发震前一年内结束高值,且绝大多数地震发生在B值高异常区内。

We scanned B-values of releasing stress-strain energy speed before moderate earthquakes in Henan Province in temporal and spatial evolution. Based on the comparison and analysis of B-values before all ML≥47 earthquakes in the temporal and spatial evolution since 1970, we get the conclusion that high B-value anomaly appeared before moderate earthquakes, it ended in one and half year before the earthquakes, and the most of earthquakes occurred in the anomaly area of high B-value.