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1983年9月21日18点58分,彭县丽春公社境内发生了一次3.7级有感地震。微观震中:东经103°52′;北纬30°57′。宏观震中在丽春桂花隆丰公社间,估计烈度V度。该地震属前震——主震——余震型。距震中9公里的中和无线电厂地震测报站DD——1型微震仪单台测定的地震序列共29次,前震10次,M≥2级4次,其中3次有感。距震中42公里的岷江齿轮厂地震台单台同时测得地震18次,M≥2级共6次。
At 18:58 on September 21, 1983, there was a magnitude 3.7 earthquake in the territory of Pengchun Li Commune. Micro-epicenter: east longitude 103 ° 52 ’north latitude 30 ° 57’. The macro epicenter was between Lonchuang and Longfeng communes, estimating the intensity of V degrees. The earthquake is a pre-earthquake - main shock - aftershock type. The earthquake sequence of DD - 1 microseismometer, which is 9 km away from the epicenter of the epithermal radio station, has a total of 29 seismic sequences, 10 for the front earthquake and 4 for M≥2, of which three are felt. From the epicenter of the 42 km Minjiang gear factory seismic station single station measured 18 earthquakes at the same time, M ≥ 2 a total of 6 times.