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Estimating Field Source Parameters of Gravity Change in North China Based on the Euler Deconvolution Method
作者姓名:Liu Fang  Zhu Yiqing  Zhao Yunfeng
作者单位:The Second Monitoring and Application Center, China Earthquake Administration, Xi''an 710054, China,The Second Monitoring and Application Center, China Earthquake Administration, Xi''an 710054, China,The Second Monitoring and Application Center, China Earthquake Administration, Xi''an 710054, China
基金项目:Foundation item:funded by the Natural Science Foundation of China (61627824,41274083) and the Youth Foundation of Earthquake Prediction (2017010227).
摘    要:Based on the absolute and relative gravity observations in North China from 2009 to 2014, spatial dynamic variations of the regional gravity field are obtained. We employed the Euler deconvolution method and the theoretical model to get the best estimates of parameters. Gravity field change caused by the depth and distribution in North China is calculated by back analysis. The results show the structural index that equals 1 is suitable for inversion of the gravity variation data. The inversion results indicate that the depths of anomaly field sources are spread over the Hetao fault. The research method of this paper can be used in the quantitative study on the field source and may shed new light on the interpretations of gravity change, and also provide quantitative basis for earthquake prediction index criterions based on the gravity change.

关 键 词:Euler  deconvolution  Potential  field  inversion  Gravity  change  Structural  index  North  China
收稿时间:2015/12/29 0:00:00
修稿时间:2016/3/21 0:00:00

Estimating Field Source Parameters of Gravity Change in North China Based on the Euler Deconvolution Method
Liu Fang,Zhu Yiqing,Zhao Yunfeng.Estimating Field Source Parameters of Gravity Change in North China Based on the Euler Deconvolution Method[J].Earthquake Research in China,2017,31(2):247-256.
Authors:Liu Fang  Zhu Yiqing and Zhao Yunfeng
Institution:The Second Monitoring and Application Center, China Earthquake Administration, Xi''an 710054, China,The Second Monitoring and Application Center, China Earthquake Administration, Xi''an 710054, China and The Second Monitoring and Application Center, China Earthquake Administration, Xi''an 710054, China
Abstract:Based on the absolute and relative gravity observations in North China from 2009 to 2014, spatial dynamic variations of the regional gravity field are obtained. We employed the Euler deconvolution method and the theoretical model to get the best estimates of parameters. Gravity field change caused by the depth and distribution in North China is calculated by back analysis. The results show the structural index that equals 1 is suitable for inversion of the gravity variation data. The inversion results indicate that the depths of anomaly field sources are spread over the Hetao fault. The research method of this paper can be used in the quantitative study on the field source and may shed new light on the interpretations of gravity change, and also provide quantitative basis for earthquake prediction index criterions based on the gravity change.
Keywords:Euler deconvolution  Potential field inversion  Gravity change  Structural index  North China
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