Analysis on Potential Earthquake Risk of Capital Zone Based on Multiple Seismicity Parameters

With the Seismic catalog from regional seismic network in the last 32 years, we calculated the b value.Based on the spatial distribution of b value and previous studies of fault segmentation, we calculated the multiple seismicity parameter values.Associating with historical and current seismicity background of Capital zone, we analyzed the current seismicity characteristics, and obtained the fault segments that relatively are in high stress and locking phase.The results show that:each segment's value of the Zhangjiakou-Bohai fault land part is lower than the segments of Shanxi fault zone, which suggest the stress level of Zhangjiakou-Bohai fault land part is higher than the Shanxi fault zone.After analyzing the combination features of the, n, and four parameters, we believed that the future occurrence risk of moderate-strong earthquake in Yan-huai basin should be pay more attention to.