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地震 ›› 2002, Vol. 22 ›› Issue (1): 91-96.

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新疆天山地区定点形变群体异常特征与地震活动

杨又陵, 曲延军   

  1. 新疆维吾尔自治区地震局,新疆乌鲁木齐 830011
  • 收稿日期:2001-02-07 修回日期:2001-08-23 出版日期:2002-01-31 发布日期:2021-12-21
  • 作者简介:杨又陵(1951-),女,江西上饶人,高级工程师,主要从事地震前兆及地震预报研究。

Grouping characteristics of fixed point deformation anomaly and seismicity in the Tianshan area of Xinjiang Region

YANG You-ling, QU Yan-jun   

  1. Seismological Bureau of Xinjiang Uygur Autonomous Region, Urumqi 830011, China
  • Received:2001-02-07 Revised:2001-08-23 Online:2002-01-31 Published:2021-12-21

摘要: 利用定义的形变异常密度和趋势分析法研究了1990~ 2000年新疆天山地区定点形变异常的时空分布、群体异常特征及与中强地震活动的关系。结果表明,各分区形变资料显示的高密度异常在时间上与b 值异常有一定的相关性,与该地区的中强地震活动有较好的对应关系;一组中强地震前2~ 4年能观测到形变趋势项的转折、加速等变化。

关键词: 定点形变, 异常密度, 地震活动, 天山地区

Abstract: The relation between the time-space distribution and grouping characteristics of the fixed point deformation anomaly as well as the activity of moderately strong earth-quakes in Tianshan region in 1990~ 2000 was studied by using deformation anomaly densi-ty defined in the paper and trend analysis method. It is thought that the highdensity anomaly observed inevery sub-area has a certain relation with value b in time and a good correspondence to the activity of moderately strong earthquakes in the area; the turning and accelerating deformation variations of long-term trend can be observed in 2-4 years be-fore a group of moderately strong earthquakes.

Key words: Fixed point deformation, Anomaly density, Seismicity, Tianshan region

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