川滇地区A(b)值动态演化特征及其在强震预测中的应用

Dynamic Evolution Characteristics of A(b) Value in the Sichuan-Yunnan Region and Its Application in Strong Earthquake Forecast

以定量描述地震活动性的A(b)值作参数,利用1971～2000年川滇地区M≥2.5地震资料进行空间扫描.结果表明,川滇地区有72%的M≥6.0地震在震前1～2 a,在震中周围出现A(b)值异常.用R值对其进行评分,通过检验.

Taking the A（b） value for describing seismicity as parameter, we use the M≥2. 5 earthquakes from 1971 to 2000 in the Sichuan and Yunnan regions to do a spatial scan analysis. The results show that A（b） value anomaly would appear near the epicenter 1 to 2 years before the 72% of M≥6. 0 earthquakes in the Sichuan and Yunnan regions. Using R value to grade it passes the check.