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地震 ›› 2003, Vol. 23 ›› Issue (1): 48-52.

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体应变潮汐观测资料信息提取与映震效果

杨林章   

  1. 中国地震局分析预报中心, 北京 100036
  • 收稿日期:2002-05-27 修回日期:2002-08-07 出版日期:2003-01-31 发布日期:2021-12-21
  • 作者简介:杨林章( 1962-), 男, 山西定襄人, 副研究员, 主要从事地壳形变、固体潮、工程技术等研究。

Information extracted from the observed data of volume strain tides and its response to earthquakes

YANG Lin-zhang   

  1. Center for Analysis and Prediction, CSB, Beijing 100036, China
  • Received:2002-05-27 Revised:2002-08-07 Online:2003-01-31 Published:2021-12-21

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摘要： 根据体应变观测资料的特点, 研究了体应变观测资料的处理方法, 提出了在时间域分析的数学模型。在数学模型中, 将潮汐因子、气压系数、非潮汐应变速率和加速度一并考虑, 在资料处理结果中, 这些参数可同时取得。分别用时间域分析方法和频率域分析方法对观测数据进行了处理, 发现潮汐因子、气压系数、应变速率和加速度等参数在大同地震前均有大小不同、持续时间不等的异常, 这些参数可作为物理意义明确的地震中短期预测的指标。

关键词: 体应变, 固体潮, 信息提取, 中短期预测

Abstract: Based on the characteristics of the observed data of volume strain tides, a time-domain mathematical model is proposed to process the observed data of volum estrain tides. In the model, tidal factor, barometrical coefficient, no n-tidal strain rate and acceleration are simultaneously considered and computed in the process. The observed da ta a reprocessed separately in time domain and frequency domain. It is found that anomalies of different amplitudes and duration times in the above-mentioned parameters appeared before 1989 Datong M6.1 earthquake sequence. These parameters seem to have definite physical meanings when used as indicators for medium- and short-term earthquake prediction.

Key words: Volume strain, Solid earthquake tides, Information extraction, Medium and short-term prediction

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