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Variation of gravity before the Alxa Zuoqi M5.8 earthquake

ISSN号：1671-5942
期刊名称：《大地测量与地球动力学》
时间：0
分类：P[天文地球]
作者机构：[1]Geophysical Exploration Center, China Earthquake Administration, Zhengzhou 450002, China, [2]Key Laboratory of Earthquake Geodesy, Institute of Seismology, China Earthquake Administration, Wuhan 430071, China, [3]Wuhan Base of Institute of Crustal Dynamics, China Earthquake Administration, Wuhan 430071, China
相关基金：Acknowledgements We sincerely thank two anonymous reviewers for their valuable comments on the original manuscript, which improved the manuscript a lot. This work was supported by the China Earthquake Administration Earthquake Tracking Task Orientation （2016020202, 2016010216, and 2016010220）, by the ＂Three Combination＂ project of the China Earthquake Administration （163201）, by the National Natural Science Foundation of China （41204058, 41474064, and 41374088）, by the special earthquake research, China Earthquake Administration （201508009-08）, and by the Director, Foundation of Institute of Seismology, China Earthquake Administration （IS201326123）.

作者： Jianlin Feng[1], Jin Wei[2,3], Yujuan Tan[1], Jianzeng Qin[1], Bangtou Huang[1], Ruyi Xie[1]

关键词： Repeated, gravimetry, Gravity, variations, Alxa, Zuoqi, M5.8, earthquake, High, gravity, gradient, belt, Repeated gravimetry , Gravity variations, Alxa Zuoqi M5.8 earthquake, High gravity gradient belt

中文摘要：

In this study, a classic survey adjustment computation method was used for data obtained in the Inner Mongolia and Ningxia gravimetric networks between September 2013 and April 2015 so as to investigate the variation of gravity before the Alxa Zuoqi M5.8 earthquake. The relationship between gravity variation and the Alxa Zuoqi M5.8 earthquake was analyzed. The results showed that:(1) the severe variation in gravity field at the test sites before the Alxa Zuoqi M5.8 earthquake, as well as the subsequent accelerated rising, might be an earthquake precursor;(2) the Alxa Zuoqi M5.8 earthquake occurred at the turning point where the high-gravity gradient zone changed from the NE direction to NW.

英文摘要：

In this study, a classic survey adjustment computation method was used for data obtained in the Inner Mongolia and Ningxia gravimetric networks between September 2013 and April 2015 so as to investigate the variation of gravity before the Alxa Zuoqi M5.8 earthquake. The relationship between gravity variation and the Alxa Zuoqi M5.8 earthquake was analyzed. The results showed that：（1） the severe variation in gravity field at the test sites before the Alxa Zuoqi M5.8 earthquake, as well as the subsequent accelerated rising, might be an earthquake precursor; （2） the Alxa Zuoqi M5.8 earthquake occurred at the turning point where the high-gravity gradient zone changed from the NE direction to NW.

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