华东地区大震前的地震平静及发震模式研究  

Research on seismic quiescence and seismogenic patterns before large earthquakes in East China region

作　　者：李强[1] 徐桂明[1] 

机构地区：[1]江苏省地震局,江苏南京210014

出　　处：《地震》2003年第4期57-63,共7页Earthquake

摘　　要：Wyss等人的地震平静理论是一种较系统的、目前较为广泛认同的平静理论。根据该平静理论,以累计频度定量计算方法对华东地区(苏、鲁、沪、皖,黄海)1970年以来大震前的平静现象进行了研究,并对该地区MS≥5.5地震的发震模式进行了探讨。结果表明,多数震例在震前出现了平静异常,平静异常大多出现在震前半年至一年内,发震模式形式多样,说明了震源区及其邻近断层结构的不均匀和复杂程度的差异。Using the quantitative calculation method of accumulative frequency, the seismic quiescence and seismogenic patterns before large earthquakes in East China region since 1970 are researched. The results show that the most cases have quiescence anomaly, occurred half a year to one year before large earthquakes; and that there are different kinds of seismogenic patterns before large earthquakes, which indicates the differences of the inhomogeneity and complexity in focal region and its neighboring fault structure.

关 键 词：华东地区 地震平静理论 发震模式 定量计算 地震活跃 地震预报 

分 类 号：P315.7[天文地球—地震学]