南北地震带中南段断层现今活动

地震 ›› 2001, Vol. 21 ›› Issue (3): 31-38.

南北地震带中南段断层现今活动

车兆宏, 张艳梅

中国地震局综合观测中心,北京 100039

收稿日期:2000-10-16 修回日期:2000-12-20 出版日期:2001-07-31 发布日期:2022-06-02
作者简介:车兆宏(1940-),男,陕西西安人,研究员,主要从事地形变及地震预报研究。

The recent fault activity along the middle and southern segments of South-North Seismic Belt

CHE Zhao-hong, ZHANG Yan-mei

Center for Comprehensive Surveying, CSB, Beijing 100039, China

Received:2000-10-16 Revised:2000-12-20 Online:2001-07-31 Published:2022-06-02

摘要/Abstract

摘要： 分析了南北地震带中南段流动形变资料,研究了断层现今活动的空间分布及特征。结果表明,红河断裂带、楚雄-通海断裂带及鲜水河断裂带活动水平最高,龙门山断裂带活动最弱;断层活动水平近年总体未见加剧或减缓。研究认为: 强震前区域断层活动加剧;断层突然错动引起的位移在地质资料显示的断层位移中占主要成分;近期南北地震带南段仍将保持近20年强震频发的态势,中段近年有发生6级地震的可能; 楚雄-通海断裂带中段及鲜水河断裂带两端,为值得注意的强震危险区。

关键词: 断层位移速率, 地震活动性, 南北地震带

Abstract: In this paper the authors have analyzed the data of mobile geodetic deformation along the middle and southern segments of South-North Seismic Belt and studied the spatial distribution and characteristics of fault activity in recent time. The results show that the fault activity rate a long Honghe-Chuxiong-Tonghai fault and Xianshuihe fault is the hig hest and Longmenshan fault is the slow est. Fault activity levels in the recent years have not intensified or become weaker in general. Through studies the authors put forw ard several viewpoints as follows: Regional fault activity strengthens before strong earthquakes. Sudden fault displacement possesses an important part of fault movement, which exhibited in the geologic data. Along southern segment of South-North Seismic Belt in the near future there will keep the same state of high frequency of strong earthquake occurrence as in the past 20 years. Along the middle segment of South-North Seismic Belt there is a possibility that the earthquake with M_S=6 may occur in recent years. The middle of Chuxiong-Tonghai fault and the two ends of Xianshuihe fault are risk locations of strong earthquakes, which deserve the notice.

Key words: Fault displacement rate, Seismicity, South-North Seismic Belt

中图分类号:

车兆宏, 张艳梅. 南北地震带中南段断层现今活动[J]. 地震, 2001, 21(3): 31-38.

CHE Zhao-hong, ZHANG Yan-mei. The recent fault activity along the middle and southern segments of South-North Seismic Belt[J]. EARTHQUAKE, 2001, 21(3): 31-38.

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