华北地区6.0级以上地震前非均匀度CV值异常变化特征

通过对非均匀度 CV值等时间、等地震个数时间扫描和空间的扫描 ,对 1970年以来华北地区8次 6 .0级以上地震前 CV值的异常变化进行了研究 ,认为在发震区域内强震前 CV值与地震有较好的对应关系 ,出现较为明显的上升过程后 ,在回落或回落过程中发震 ,表明地震活动的丛集性是强震发生的重要异常特征

Variation Feature of Inhomogeneity Anomaly Value CV before Earthquake with Magnitude M>6.0 in North China

Through the scanning for the inhomogeneity value C V by the equal time,the equal number of earthquake and the space,the trend variation of the anomaly value C V before the 8 earthquakes with magnitude M>6 0 in North China since 1970 was analyzed There is better corresponding relation between the C V value before the moderately strong earthquakes and the earthquake in the seismogenic zone After the C V value rose,the earthquake occurred in the falling process of the C V value It showed that the earthquake cluster is the basic anomaly feature before the moderately strong earthquake