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地震 ›› 2001, Vol. 21 ›› Issue (2): 87-93.

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南北地震带北段及其两侧断层现今活动性*

范燕, 车兆宏   

  1. 中国地震局综合观测中心,北京 100039
  • 收稿日期:2000-09-13 修回日期:2000-11-14 出版日期:2001-04-30 发布日期:2022-10-27
  • 作者简介:范燕,女,山东龙口人工程师主要从事地壳形变及地震预报研究。

The fault activity in recent time along northern section of North-South Seismic Belt and its both sides

FAN Yang, CHE Zhao-hong   

  1. Center for Comprehensive Surveying, CSB, Beijing 100039, China
  • Received:2000-09-13 Revised:2000-11-14 Online:2001-04-30 Published:2022-10-27

摘要: 分析了南北地震带北段及其两侧跨断层流动形变资料,研究了各断裂带的活动水平、动态过程及其与强震的关系。结果表明, 南北地震带北段及其两侧现今断层平均垂直活动速率为0.19mm/a,断层活动处于第四纪以来较低水平;区域断层活动增强是强震发生的重要标志之一;强震前断层异常活动存在由外围向震中迁移的特征;南西华山-六盘山断裂带为近年可能发生强烈地震的地区。

关键词: 断层位移速率, 地震活动性, 南北地震带

Abstract: In this paper we have analy zed the data of mobile geodetic defo rmation across faults along northern section of North-South seismic belt and its both sides, and studied the activity lev el, dy namic ev olution and relation to st rong earthquakes of every fault zone. The results show that the average of fault movement rate is 0.19mm/a alongno rthern section of North-South seismic belt and its bo th sides. The fault activity has been in the lower level since Quaternary period. Regional fault activity st reng thening is an important symbol for occurrence of strong earthquakes. There is afeature that fault anomalous activity migrates from the outlying zone to the epicenters before strong earthquakes. Southwest Huashan-Liupanshan fault zone is the potential region of strong earthquake occurrence in the nea rfuture.

Key words: Fault movement rate, Seismicity, North-South seismic belt

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