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[1]JIA Lifeng,QIAO Ziyun,ZHANG Gouling,et al.Variation of the Geomagnetic Anomaly Characteristics before the Liaoning Dengta M5.1 Earthquake in 2013[J].Journal of Seismological Research,2017,40(03):437-443.

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Variation of the Geomagnetic Anomaly Characteristics before the Liaoning Dengta M5.1 Earthquake in 2013

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 40 Number of periods: 2017 03 Page number: 437-443 Column: 流动地磁专栏 Public date: 2017-07-23

Title:: Variation of the Geomagnetic Anomaly Characteristics before the Liaoning Dengta M5.1 Earthquake in 2013

Author(s):: JIA Lifeng; QIAO Ziyun; ZHANG Gouling; KOU Haichuan; LIANG Hongjie; (Hebei Earthquake Agency,Shijiazhuang 050021,Hebei,Chian)

Keywords:: Dengta M5.1 earthquake; geomagnetic anomaly; geomagnetic harmonic wave amplitude ratio; spatial correlation of geomagnetic F₂₁; regional geomagnetic low-point displacement method

CLC:: P318

DOI:: -

Abstract:: Using the geomagnetic data recorded between January 2008 and December 2015 that observed by four geomagnetic stations such as Tieling,Yingkou,Tonghua and Chaoyang,we study the Dengta M5.1 earthquake through the methods including geomagnetic harmonic wave amplitude ratio(HWAR)and spatial correlation of geomagnetic F₂₁(SC-F₂₁).And by scanning the large area of geomagnetic low-point displacement anomalies(LPD)based on geomagnetic Z component data provided by 16 stations around the epicenter,we analyze short-term earthquake geomagnetic anomalies that may occur before the earthquake.Then we summarizes the different magnetic medium to short-term anomaly characteristics that appeared before the earthquake.The study showed that the HWAR appeared some decline anomaly about 2～4 years before the Dengta earthquake and the earthquake occurred in the rising stage.Some obvious decline anomaly appeared before the earthquake in the SC-F₂₁ result,and a clear dividing line appeared in LPD method about 13 days before the earthquake occurred.

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Last Update: 2017-07-20