欢迎访问《地震》,

地震 ›› 2000, Vol. 20 ›› Issue (2): 89-93.

• • 上一篇    下一篇

地震活动非均匀度CV值在南北地震带强震前的中长期趋势异常特征

曹志华   

  1. 中国地震局分析预报中心,北京 100036
  • 收稿日期:1999-04-06 修回日期:1999-08-02 出版日期:2000-04-30 发布日期:2022-09-26
  • 作者简介:曹志华(1969-),女,工程师, 1999年获硕士学位,主要从事地震预报研究。

Long-and medium-term anomalous variation of CV value before strong earthquakes along North-South Seismic Belt

CAO Zhi-hua   

  1. Cen ter for analysis and Prediction, CSB, Beijing 100036, China
  • Received:1999-04-06 Revised:1999-08-02 Online:2000-04-30 Published:2022-09-26

摘要: 通过对1970年以来南北地震带上6次强震前中长期地震活动非均匀度CV值与地震活动关系的分析,结果表明在4次强震前,非均匀度值出现中长期(数年)趋势下降过程,地震活动群集度CV变化幅度在0.5~1.3之间。显示了地震活动群集程度变化与地震孕育和发生过程的密切关系,表明地震活动非均匀度CV值能够反映强震前一定区域内的前兆信息。同时,地震活动非均匀度在不同强震前的复杂变化特征也显示了前兆过程的复杂性和多样性。

关键词: 非均匀度, 强震, 地震活动, 地震预报

Abstract: The paper analy zed the coefficient of va riation(CV) and earthquake intero ccurence time before the 6 strong earthquakes along North-south ea rthquake belt in China. The result shows that sev eral mo nths or one year before the main-shock, the coefficient of variation drops slowly, ranging from 0.5~1.3. Among six strong earthquakes, the variation of CV drops in long and medium term before four earthquakes. The result indicates the coefficient of CV reflect some complexity of seismic precurso rsbefore strong earthquakes.

Key words: Coefficient of variation, Strong earthquake, Seismicity, Earthquake prediction

中图分类号: