地球物理学进展 ›› 2019, Vol. 34 ›› Issue (5): 1714-1720.doi: 10.6038/pg2019CC0281

• 固体地球物理及空间物理学(大气、行星、地球动力学、重磁电及地震学、地热学) • 上一篇    下一篇

南北地震带潮汐触发地震的统计学证据

陈全1,2,安张辉1,2,*(),范莹莹1,2   

  1. 1. 中国地震局兰州地震研究所,兰州 730000
    2. 甘肃省地震局,兰州 730000
  • 收稿日期:2018-11-26 修回日期:2019-05-13 出版日期:2019-10-28 发布日期:2019-10-28
  • 通讯作者: 安张辉 E-mail:anzhanghui5@hotmail.com
  • 作者简介:陈全,男,1994年生,在读硕士,主要从事地震电磁学方面的研究.(E-mail: 1195241621@qq.com)
  • 基金资助:
    中国地震局地震科技星火计划(XH16037);甘肃省科技计划资助(17JR5RA338)

Statistical evidence of tidal triggered earthquakes in north and south seismic belt

CHEN Quan1,2,AN Zhang-hui1,2,*(),FAN Ying-ying1,2   

  1. 1. Lanzhou Institute of Seismology, CEA, Gansu, Lanzhou 730000, China
    2. Earthquake Administration of Gansu Province, Gansu, Lanzhou 730000, China
  • Received:2018-11-26 Revised:2019-05-13 Online:2019-10-28 Published:2019-10-28
  • Contact: Zhang-hui AN E-mail:anzhanghui5@hotmail.com

摘要:

自19世纪90年代以来,潮汐是否会触发地震这个问题一直备受关注.本研究选用1970年1月1日至2017年5月31日期间南北地震带(20°N—40°N,97°E—105°E)ML≥2.0地震目录资料,通过测量南北地震带地区地震事件与潮汐的相关性来研究潮汐是否能触发地震.选用完备性检测、G-C法、 R/S 分析方法对原始地震目录进行预处理,分别构成未去除余震和去除余震每日地震数量时间序列,利用经验模态分解和快速傅里叶方法,对比分析了潮汐与每日地震数量构成的时间序列频谱特征.结果表明,在本文研究区域,两种每日地震数量时间序列均与潮汐的月潮周期、半月潮周期存在相关性,并且去除余震后的每日地震时间序列的优势频率更加集中,表现的相关性更好.此外,Schuster’s测试结果也进一步证明,研究区域地震活动性与固体潮汐存在显著统计相关性.

关键词: 经验模态分解, 潮汐, 地震

Abstract:

The question of whether tides trigger earthquakes has been a concern since the 1890s. In this study, 20 °N—40 °N, 97 °E—105 °E) ML≥2.0 earthquake catalogue data of the north-south seismic belt from January 1,1970 to May 31,2017 are selected to study whether the tide can trigger an earthquake by measuring the correlation between the seismic events and the tide in the north-south seismic belt. The complete seismicity detection, GC method, and R/S analysis method were used to preprocess the original earthquake catalog, which constitute the time series of daily earthquakes without the removal of aftershocks and the removal of aftershocks, respectively. Using empirical mode decomposition and fast Fourier methods, the spectral characteristics of time series composed of tide and daily earthquake are compared and analyzed. The results show that in the study area of this paper, the two kinds of daily earthquake time series are correlated with fortnightly tide and lunar tide of the tide, and the dominant frequency of the daily earthquake time series after removing aftershocks is more concentrated. Its performance is more relevant. In addition, the results of Schuster’s test further prove that there is a significant statistical correlation between the regional seismicity and the solid tide.

Key words: Empirical mode decomposition, Tidal, Earthquake

中图分类号: