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1982年10月8日21点34分53秒,在云南省西部洱源县的牛街地区发生了一次中强地震。据云南省地震台网测定,震级(M_S)为5.2,震中位置为北纬26°16′,东经99°55′,震源深度为10公里。经现场调查,在牛街公社的落书村和太平村一带形成了两个烈度为Ⅵ度的极震区。等烈度线长轴方向分别为北东25°和北东5°。本文就这次地震的烈度分布特点作初步分析。
At 8:34:53 on October 8, 1982, a moderate-to-severe earthquake broke out in Niujie, Eryuan County, western Yunnan. According to the Yunnan Seismological Network, the magnitude (M_S) was 5.2, the epicenter was located at 26 ° 16 ’north latitude, 99 ° 55’e long and the focal depth was 10 km. After an on-site investigation, two extremely severe earthquakes of intensity Ⅵ were formed in the book village and Taiping village of Niujie commune. The major axis of the isotherm lines are respectively north east 25 ° and north east 5 °. This paper gives a preliminary analysis of the characteristics of the earthquake intensity distribution.