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地震 ›› 1999, Vol. 19 ›› Issue (3): 239-244.

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全国环境剪应力场动态变化与强震活动研究

王绍晋, 龙晓帆   

  1. 中国昆明 650041 云南省地震局
  • 收稿日期:1998-07-23 修回日期:1998-11-05 出版日期:1999-07-31 发布日期:2022-07-14
  • 作者简介:王绍晋,男,1946年8月出生,高级工程师,主要从事构造应力场、地震活动性以及地震预报研究工作。
  • 基金资助:
    中国地震局“九五”科研攻关项目(95-04-04-02-03)

RESEARCH ON RECENT DYNAMIC VARIATION IN ENVIRONMENTAL SHEAR-STRESS FIELD AND STRONG SEISMICITY IN CHINA

Wang Shaojin, Long Xiaofan   

  1. Seismological Bureau of Yunnan Province, Kunming 650041, China
  • Received:1998-07-23 Revised:1998-11-05 Online:1999-07-31 Published:2022-07-14

摘要: 通过采用陈培善等深入研究地震震源谱特征得到的地震短周期体波震级mb和地震矩Mo与环境剪应力值的关系,测算地震剪切应力强度值fo的方法,以及由中小地震近震震级ML和面波震级MS估算fo的方法,对1993年至1998年1月发生在全国(包括台湾地区)mb≥3.8,MS ≤5.9 地震计算得到地震震源处的相对剪切应力强度fo值,并确定出环境剪应力场高值分布区,对高剪应力值分布区与主要活动断裂、强震活动的相关关系进行了分析研究,对全国未来1~3年强震危险区及其危险性进行了预测。

关键词: 地震预测, 环境剪应力场, 动态变化, 强震活动

Abstract: In this paper, using two methods to calculate seismic shear-stress strength f0 obtained by Chen and others from the relation between short period body wave magnitude mb, seismic moment M0 and environmental shear-stress value in a thorough study of the characteristics of source spectrum and surface wave magnitudeMS of moderate and small events, the authors calculated the relative shear-stress strength value f0 in seismic source from the earthquakes with mb ≥ 3.8 and MS ≤ 5.9 occurred from 1993 to January, 1998 in China, determined the high-value distribution area of environmental shear-stress field, studied the correlation between the high-shear-stress distribution area and major active faults and strong seismicity, and forecasted strongly seismic risk areas and their risk in the coming 1~3 years in China.

Key words: Earthquake forecast, Environmental shear-stress field, Dynamic variation, Strong seismicity