一九八一年六月二十三日六时十四分在北部湾(北纬20.5°东经108.5°)海域里发生4.2级地震。地震发生时,我县沿海几个公社有感。发震前的一个月,曾出现井水异常现象。 一、大番坡公社井水异常情况 1、大番坡公社院内井水(北纬21°50′53.5″,东经108°38′43.5″)一九六四年建井、同年使用、井深7米(经常水位6米),该井水源充足,可供公社、农机站、兽医站及部分居民150多人饮用,水位无多大变化,水清凉有点甜味。地震前一个月,即一九八一年五月二十七日,井水突然变浑变色、发臭(臭污水、臭鸡蛋及鱼腥味),水位下 The quake struck a 4.2 magnitude earthquake at Beibu Wan (latitude 20.5 ° E 108.5 °) on June 23, 1981 at 6:14. At the time of the earthquake, there were several communes in our county along the coast. A month before the earthquake, there was an abnormal well water phenomenon. First, Dapanpo commune well water anomalies 1, Dapan slope commune well water (latitude 21o50’53.5 “, longitude 108o38’43.5”) built in 1964, the same year, well depth of 7 meters (Often water level of 6 meters), well enough water for communes, farm stations, veterinary stations and some residents of more than 150 people drink, no major changes in water level, the water cool a bit sweet. One month prior to the earthquake, May 27, 1981, well water suddenly became muddy and discolored, stinking (stinky water, stinking eggs and fishy smell), and water level