1983年10月18日17时53分,宝兴县境内发生一次4.2级地震,微观震中北纬30°05′,东经102°42′。据考察确定,这次4.2级地震宏观震中位于宝兴县城西北18公里,即宝兴县陇东公社先锋大队一带。震中烈度Ⅴ度强,Ⅴ度区长轴呈NE45°方向展布,长约为9公里,短轴长5公里,Ⅴ度区面积为45平方公里。这次地震有感范围较宽,北至小金 At 17:53 on October 18, 1983, a magnitude 4.2 earthquake occurred in Baoxing County. The micro-epicenter was latitude 30o 05 ’north and longitude 102o 42’east. According to the investigation confirmed that the macro epicenter of the 4.2 magnitude earthquake is located 18 kilometers northwest of Baoxing County, that is, Baoshan County Longdong commune Pioneer Brigade area. The epicentral intensity Ⅴ degree is strong, and the long axis of Ⅴ degree is distributed in the direction of NE45 °, about 9 km in length with a minor axis of 5 km and the area of ​​Ⅴ degree of 45 km 2. The earthquake felt a broader range, north to small gold