中国地震档案史上,有这样一段记录:1970年1月5日凌晨1时0分37秒,云南通海发生了7.7级大地震,到当年12月31日,该地区共发生4级到4.9级余震71次,5级到5.9级余震12次。受灾波及面积达8800平方公里,造成通海、峨山、建水、玉溪等县15621人死亡,26783人受伤。震中通海受灾极为惨重,全县死亡4426人,占当时总人口的2.64%,倒塌房屋136936间,占震前全县民房总数的73.5%,处于震中区 In the history of China’s earthquake archives, there was such a record: At 1:03:37 on January 5, 1970, a magnitude 7.7 earthquake occurred in Tonghai, Yunnan Province. By December 31 of that year, there were altogether 4 to 4.9 aftershocks 71 times, 5 to 5.9 aftershocks 12 times. Affected affected area of ​​8800 square kilometers, resulting in Tonghai, Eshan, Jianshui, Yuxi counties and 15,621 were killed and 26,783 were injured. Epicenter of the sea disaster is extremely heavy, the county died 4426 people, accounting for 2.64% of the total population, collapsed houses 136,936, accounting for 73.5% of the total number of houses before the earthquake in the county, in the epicenter