M9 Tohoku Earthquake Hydro- and Seismic Response in the Caucasus and North Turkey

IF 2 4区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS Acta Geophysica Pub Date : 2016-12-02 DOI:10.1515/acgeo-2016-0022
T. Chelidze, I. Shengelia, N. Zhukova, T. Matcharashvili, G. Melikadze, Genady Kobzev
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引用次数: 4

Abstract

Presently, there are a lot of observations on the significant impact of strong remote earthquakes on underground water and local seismicity. Teleseismic wave trains of strong earthquakes give rise to several hydraulic effects in boreholes, namely permanent water level changes and water level oscillations, which closely mimic the seismograms (hydro-seismograms). Clear identical anomalies in the deep borehole water levels have been observed on a large part of the territory of Georgia during passing of the S and Love–Rayleigh teleseismic waves (including also multiple surface Rayleigh waves) of the 2011 Tohoku M9 earthquake. The analysis carried out in order to find dynamically triggered events (non-volcanic tremors) of the Tohoku earthquake by the accepted methodology has not revealed a clear tremor signature in the test area: the Caucasus and North Turkey. The possible mechanisms of some seismic signals of unknown origin observed during passage of teleseismic waves of Tohoku earthquake are discussed.
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东北9级地震-高加索和土耳其北部的水文和地震反应
目前,有大量的观测资料表明,强地震对地下水和局地地震活动有显著的影响。强震的远震波列在钻孔中产生几种水力效应,即永久的水位变化和水位振荡,这些效应与地震图(水文地震图)非常相似。在2011年东北9级地震的S和Love-Rayleigh远地震波(也包括多个表面Rayleigh波)传递期间,在格鲁吉亚的大部分地区观察到深钻孔水位明显相同的异常。为了寻找东北地震的动态触发事件(非火山震动),采用公认的方法进行了分析,但在高加索和北土耳其的测试区域没有显示出明确的震动特征。讨论了东北地震远震波传播过程中观测到的一些来源不明的地震信号的可能机制。
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来源期刊
Acta Geophysica
Acta Geophysica 地学-地球化学与地球物理
CiteScore
3.90
自引率
13.00%
发文量
251
审稿时长
5.3 months
期刊介绍: Acta Geophysica is open to all kinds of manuscripts including research and review articles, short communications, comments to published papers, letters to the Editor as well as book reviews. Some of the issues are fully devoted to particular topics; we do encourage proposals for such topical issues. We accept submissions from scientists world-wide, offering high scientific and editorial standard and comprehensive treatment of the discussed topics.
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