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地震 ›› 2019, Vol. 39 ›› Issue (3): 158-165.

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盖州震群谱振幅相关系数的研究

杨士超, 张博, 曹凤娟, 王亮, 邵媛媛   

  1. 辽宁省地震局, 辽宁 沈阳 110034
  • 收稿日期:2018-08-21 出版日期:2019-07-31 发布日期:2019-08-09
  • 作者简介:杨士超(1989-), 男, 辽宁沈阳人, 助理工程师, 主要从事地震活动性和数字地震学等研究。
  • 基金资助:
    地震预测研究所所长专项(2018IEF010203); 辽宁省地震局青年科研基金(LZ201803)

Study on Correlation Coefficient of Spectral Amplitude of Gaizhou Earthquake Swarms

YANG Shi-chao, ZHANG Bo, CAO Feng-juan, WANG Liang, SHAO Yuan-yuan   

  1. Earthquake Administration of Liaoning Province, Shenyang 110034, China
  • Received:2018-08-21 Online:2019-07-31 Published:2019-08-09

摘要: 利用辽宁省数字地震台网记录的波形数据, 计算了2012年盖州青石岭震群和2014年盖州西海域震群的谱振幅相关系数, 结果显示, 盖州青石岭震群谱振幅相关系数为0.72~0.90, 2016年之后稳定在0.75, 相关系数略低, 震源机制解一致性较低; 盖州西海域震群谱振幅相关系数为0.85~0.99, 2015年之后随着震群活动的减弱谱振幅相关系数稳定在0.85, 相关系数较高, 震源机制解一致性较高。 结合盖州地区视应力水平分析认为, 盖州地区谱振幅相关系数的变化与该地区应力水平的变化存在着一定的相关性。

关键词: 盖州震群, 谱振幅相关系数, 震源机制一致性, 应力水平

Abstract: The spectral amplitude correlation coefficient of the 2012 Qingshiling earthquake swarm and the 2014 Xihaiyu earthquake swarm in Gaizhou City were calculated by using digital seismic waveform data recorded in Liaoning Digital Seismic Network. The results show that the correlation coefficient of spectral amplitude of Qingshiling earthquake swarm is 0.72~0.90 and finally stabilizes at 0.75. The low value of the correlation coefficient of spectral amplitude indicates low consistency of focal mechanisms. The correlation coefficient of spectral amplitude of Xihaiyu earthquake swarm is 0.85~0.99 and finally stabilizes at 0.85. The high value of the correlation coefficient of spectral amplitude indicates high consistency of focal mechanisms. According to the analysis of the apparent stress in Gaizhou City, it is deemed that the variation of correlation coefficient of spectral amplitude of Gaizhou City is related to the change of stress level in this region.

Key words: Gaizhou earthquake swarms, Correlation coefficient of spectral amplitude, Consistency of focal mechanism, Stress level

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