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On Possible Electromagnetic Precursors to a Significant Earthquake (Mw = 7.0) Occurred in JiuZhaiGou (China) on 8 August 2017

Published: 20 April 2020 Publication History

Abstract

This paper reports an attempt to use low-frequency electromagnetic data (ED) from the Multi-component Seismic Monitoring System (AETA) in the study of earthquake precursors in China. The data from 5 AETA stations deployed within 200 km of the epicenter have been analyzed in the search for possible precursors to a strong earthquake that occurred JiuZhaiGou, (China) on 8 August 2017, with magnitude Mw = 7.0 and focal depth = 20 km. By calculating the correlation between the electromagnetic signals of every 2 AETA stations, an attempt is made to extract relatively weak electromagnetic anomaly information from a strong interference background. The analysis is based on a new method of calculating correlation, called local correlation tracking (LCT) method. Comparing with the classical correlation method, the proposed method can better extract the weak difference of this kind of electromagnetic signal. The electromagnetic data of AETA was analyzed by LCT method. It was found that the correlation coefficient showed an abnormality within one week before the earthquake, which indicated that the weak anomaly in the electromagnetic signal was found. It is concluded that this may be the electromagnetic precursor anomaly signal caused by the significant earthquake, so we hope that this will be helpful to the study of earthquake prediction.

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Cited By

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  • (2021)Statistical Analysis of the Relationship between AETA Electromagnetic Anomalies and Local EarthquakesEntropy10.3390/e2304041123:4(411)Online publication date: 30-Mar-2021
  • (2021)Periodic electromagnetic signals as potential precursor for seismic activity一种反应地震前兆活动的周期性电磁信号Journal of Central South University10.1007/s11771-021-4739-128:8(2463-2471)Online publication date: 19-Jul-2021

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    cover image ACM Other conferences
    ICISS '20: Proceedings of the 3rd International Conference on Information Science and Systems
    March 2020
    238 pages
    ISBN:9781450377256
    DOI:10.1145/3388176
    Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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    • University of Salford: University of Salford
    • Cardiff University: Cardiff University
    • Kingston University: Kingston University

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    Published: 20 April 2020

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    Author Tags

    1. AETA
    2. Electromagnetic data (ED)
    3. earthquake monitoring
    4. electromagnetic precursor
    5. local correlation tracking (LCT)

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    • the fundamental research project of Shenzhen science and technology application demonstration project

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    View all
    • (2021)Statistical Analysis of the Relationship between AETA Electromagnetic Anomalies and Local EarthquakesEntropy10.3390/e2304041123:4(411)Online publication date: 30-Mar-2021
    • (2021)Periodic electromagnetic signals as potential precursor for seismic activity一种反应地震前兆活动的周期性电磁信号Journal of Central South University10.1007/s11771-021-4739-128:8(2463-2471)Online publication date: 19-Jul-2021

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