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地震 ›› 1998, Vol. 18 ›› Issue (2): 146-154.

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云南孟连中缅边境 MS 7.3地震前滇西实验场的重力变化

吴国华, 罗增雄, 赖群, 罗卫民   

  1. 中国昆明 650041 云南省地震局
  • 收稿日期:1997-05-14 修回日期:1997-10-23 出版日期:1998-04-30 发布日期:2022-05-10
  • 作者简介:吴国华,男,1958年4月出生,高级工程师, 主要从事流动重力观测及分析预报研究工作。

GRAVITY VARIATION IN THE WESTERN YUNNAN EARTHQUAKE PREDICTION TEST SITE ( WYEPTS) BEFORE THE MS 7.3 EARTHQUAKE OCCURRENCE ON THE BORDER BETWEEN CHINA AND MYANMAR TO THE WEST OF MENGLIAN, YUNNAN PROVINCE

Wu Guohua, Luo Zengxiong, Lai Qun, Luo Weimin   

  1. Seismological Bureau of Yunnan Province, Kunming 650041, China
  • Received:1997-05-14 Revised:1997-10-23 Online:1998-04-30 Published:2022-05-10

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摘要： 1995年7月12日,在云南省西南部的孟连县以西中缅边境发生了一次MS 7.3强烈地震。 震前,距震中280 km以远的滇西实验场重力网红河断裂以西出现了重力异常,平均变化幅值达 70×10-8ms-2,最大变化幅值达 114×10-8ms-2,云南省地震工程研究所测量队重力组根据上述重力异常变化,对此次地震作了较好的中短期预测预报。

关键词: 重力异常, 中期预报, 短期预报, 孟连地震, 滇西实验场

Abstract: On 12 July 1995, a strong earthquake with MS 7.3 occurred on the border between China and Myanmar, to the West of Meng lian, Yunnan Province, and the gravity anomaly was detected by the gravity network of WYEPTS that located to the West of the Red River fault 280 km away from the epicenter, with the average variation value of 70×10-8ms-2 and the maximum variation value of 114×10-8ms-2. The Gravity group of Survey team, Institute of Earthquake Engineering of Yunnan Province has given a good medium-short term prediction for this earthquake according to the anomalous variation in gravity.

Key words: Gravity anomaly, Medium-short term prediction, The Menglian earthquake, The Western Yunnan Earthquake Prediction Test Site