论江苏省几次中强地震地下流体震兆特征

20世纪70年代以来,江苏省内中强地震显示了较高的活动水平(Ms>5.0级地震约3-5年发生一次).本文通过对1979年始建地震地下水动态观测井网以来,江苏省发生的几次中强地震震例资料剖析,讨论了中强地震前地下流体动态异常场和震兆信息的特征.

CHARACTERISTICS OF UNDERGROUND FLUID VARIATIONS PRIOR TO SEVERAL MODERATE-STRONG EARTHQUAKES OCCURRED IN JIANGSU PROVINCE

The seismicity in Jiangsu Province has been fairly high since 1970's and in each time interval ranging from three to five years, a moderate-strong earthquake with magnitude greater than or equal to 5.0 would likely occur. Based on the analysis of anomalous variations in underground fluid observed before several moderate-strong earthquakes which occurred in Jiangsu Province since the establishment of the groundwater observation well-network for earthquake prediction which started in 1979, the characteristics of the anomalous field and precursory information of underground fluid prior to the moderate-strong earthquakes are detailedly discussed in this paper.