采用A(b)值空间扫描方法对1980年以来河西走廊及其临近地区ML 2.3到ML 4.9地震资料进行了研究,统计分析了Ms 4.6以上地震前A(b)值异常情况,结果显示大多数Ms 4.6以上地震发生前的1-3年内,震中周围出现A(b)≥5.0的高值异常区域.R值检验结果为0.458.%Spatial scanning method for A(6) value is used to study the earthquake data of AfL 2. 3 to ML 4. 9 magnitude in Hexi Corridor and its adjacent areas since 1980. The anomalous A(6) value occurred before the earthquakes with magnitude Ms 4. 6 or larger is statistical analyzed. The results show that 1- 3 years before the occurrence of most Ms 4. 6 earthquakes, the high value anomalies of A(6)≥ 5. 0 appear around the epicenter. The R value of the test results is 0. 458.
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