1982年7月3日16时13分30秒在北纬26°28’,东经99°50’发生了 M_s=5.4级地震。震源深度 h=8公里,据宏观考察,其震中在剑川县的甸南公社,震中区烈度为7度强,7度区的长轴为7公里,短轴3公里,其方向为北北西向。地震造成了该区河边的重力滑坡、地裂缝,例如江尾村南的石灰岩中形成的裂缝最长的有5米,宽7—8厘米。在剑湖边有喷砂现象。 At 16:13:30 on July 3, 1982, an M_s = 5.4 earthquake occurred at latitude 26 ° 28 ’north and longitude 99 ° 50’ east. According to the macro survey, the epicenter was in Diannan commune in Jianchuan County. The epicenter intensity was 7 degrees strong. The long axis of 7 degree area was 7 kilometers and the short axis was 3 kilometers. Its direction was north and northwest to. The earthquake caused gravity landslides and ground fissures along the riverside in the area. For example, the longest cracks in limestone in the south of Jiangwei Village are 5 meters and 7-8 centimeters wide. In the sword lake blasting phenomenon.