地震活动性总体状态参量R_t在新疆天山地区的初步应用

Application of Integrated Parameter Rt of Seismic Activity in Tianshan Mts,Xinjiang

通过计算分析新疆北天山地区、南天山东段地区、南天山西段的柯坪块区及喀什—乌恰交汇区中强震前地震活动性总体状态参量Rt的变化特征,给出了各区中强震发生时间和强度基于Rt值的判定指标。Rt≤0.89可作为北天山地区1年内发生5.1～6.0级地震的指标;Rt≤0.79可作为南天山东段1年内发生5.4～6.0级地震的指标;Rt≤0.85可作为柯坪块区1.5年内发生6级地震的指标;Rt≤0.88可作为喀什—乌恰交汇区1年内发生6～7级地震的指标。

Tianshan Seismic Belt in China was divided into four areas： North Tianshan, the east of South Tianshan, Keping Block and the Kashi-Wuqia junction region. Based on the calculation and analysis result of R,, the integrated parameter of seismic activity, before mid-strong earthquakes in the four areas, we gave the Rt-based criteflon for judging the time and strength of mid-strong earthquakes in the areas. Rt≤0. 89 can be as the judge in- dex of Ms5.1 - 6. 0 earthquake occurring within one year in North Tianshan; Rt≤0.79 can be as the one of Ms5.4 -6. 0 earthquake occurring within one year in the east of South Tianshan; Rt≤0. 85 can be as that of Ms6. 0 earthquake occurring within 1.5 years in Keping Block; Rt≤0. 88 can be as that of Ms6 -7 earthquake occurring within one year in the Kashi-Wuqia junction region.