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地震 ›› 2006, Vol. 26 ›› Issue (1): 40-46.

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GPS水平位移时间序列地震短期信息特征分析

张晶, 顾国华   

  1. 中国地震局地震预测研究所, 北京 100036
  • 收稿日期:2005-06-10 修回日期:2005-08-03 发布日期:2021-11-01
  • 作者简介:张晶(1963-), 女, 北京市人, 副研究员, 主要从事形变及地震中长期预报等研究。
  • 基金资助:
    “十五”国家科技攻关项目(2004BA601B01-02-01); 南北地震带震情跟踪项目资助

Analyzing the characteristics of short-term anomalous information of GPS time-series data before earthquake

ZNANG Jing, GU Guo-hua   

  1. Institute of Earthquake Science, CEA, Beijing 100036, China
  • Received:2005-06-10 Revised:2005-08-03 Published:2021-11-01

摘要: 对GPS基准站连续观测水平位移时间序列数据的时-频特征进行了分析, 为了突出局部变化的信息, 在中国大陆东部选取一组参考点进行相似变换。 利用小波分析和傅里叶分析方法对资料进行处理, 分析结果表明, 2001年11月14日昆仑山口西8.1级大地震前中国大陆西部部分测点水平位移序列出现短期变化信号。

关键词: GPS时间序列, 异常信息, 昆仑山口西8.1级地震, 水平位移

Abstract: Analyzing the characteristics of the time-series data of horizontal displacement from the continuous GPS network in time and frequency domain, the similarity transformation is conducted in order to give prominence to the local deformation by selecting a few stations in the Eastern China. The data is calculated by using the wavelet transformation and Fourier transformation. The result shows that there are anomalous information of the GPS data of some stations in the west of China before the MS8.1 Kunlun earthquake on November 14th, 2001.

Key words: GPS time-series, Anomalous information, Kunlun earthquake, Horizontal displacement

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