本文所讨论的长江中下游地震区指北纬30°—34°,东经115°—123°之间的区域。有关这一地区的地震活动性,沈建文、王炜已作了研究,指出这一区域从苏北附近的黄海海域到湖北麻城一带存在一个走向近北东东的地震活动区,与该地区历史上 M≥4(3/4)级地震北东东向分布相一致,并指出这一地区地震活动期及应力场与华北地震区基本一致。 The middle and lower reaches of the Yangtze River seismic area discussed in this paper refers to the area between latitude 30 ° -34 ° and longitude 115 ° -123 °. Regarding the seismicity in this area, Shen Jianwen and Wang Wei have done some research, pointing out that there is a seismic activity zone in the area from the Yellow Sea near North Jiangsu to Macheng in Hubei to the east and north east, It is consistent with the northeast-east distribution of M≥4 (3/4) magnitude earthquakes and points out that the seismic activity and stress field in this region are basically the same as those in North China.