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1.1966年至1987年华北M_s≥5.5级地震取自中国地震目录和中国地震台网观测报告以及1981—1987年辽宁省地震局公布的国内5.0级以上地震简录;辽西M_L≥2.0级地震取自辽宁省地震局1970—1987年地震目录和中国东部地震目录。 2.华北和辽西的划分及华北M_s≥5.5级地震分布 文中所说的华北范围大致为北纬31°至43°,东经105°至123°(不包括海洋地区);辽西为北纬40°至42°30′,东经118°至120°并用斜线表示,详见图1。
1. The M_s≥5.5 earthquakes in North China from 1966 to 1987 are taken from the Chinese Earthquake Catalog and the Chinese Seismic Network Observation Report, and the catalog of earthquakes above M5.0 released by the Seismological Bureau of Liaoning Province from 1981 to 1987. The M_L≥2.0 earthquake in the west of Liaoning Province was taken from Seismological Bureau of Liaoning Province Seismological Bureau from 1970 to 1987 and the Catalog of East China Earthquake. 2. Distribution of North China and Liaoxi and Distribution of M_s≥5.5 Earthquake in North China The scope of North China is roughly 31 ° to 43 ° North Latitude and 105 ° to 123 ° East Longitude (excluding marine areas); the western Liaoning is latitude 40 ° to 42 ° 30 ’east longitude 118 ° to 120 ° and is shown by diagonal lines, as shown in Figure 1.