地震活动性层次结构分析及危险区预测方法

对地震活动性进行层次结构分析可划分出不同的地震区带,中国大陆的地震活动可分为9个地震区带,分析各个区带的地震活动性可作出某一活跃期强震发生主体地区的判别,对某一个地震区带的地震活动进行层次结构分析可作出地震危险区预测。用震源面投影图代替点投影的震中分布图可更合理地解释一个构造带上强震的发生过程,更清楚地勾画出未来强震的孕震范围。对强震破裂区闭锁段、背景空区、孕震空区的关系用实测震例进行了解释。

THE LEVEL STRUCTURAL ANALYSIS OF SEISMICITY AND PREDICTION METHOD OF EARTHQUAKE RISK REGION

Different seismic active region can be determined by level structural analysis of seismicity. There are nine seismic belts and areas in the continent of China. The main regions of strong earthquakes are determined by analysis of seismicity characters for each region. We can predict earthquake risk region by seismic level structural analysis for seismic belts and areas. The occurrence process of strong earthquakes in a fault zone could be explained more reasonable and the preparatory area of future strong earthquake could be plotted more clearly when using the surface projection of sources instead of the point projection of sources. The relations among locked segment of great earthquake rupture areas, background gap and preparatory gap are explained with earthquake examples.