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Estimating Field Source Parameters of Gravity Change in North China Based on the Euler Deconvolution Method
Liu Fang,Zhu Yiqing,Zhao Yunfeng
作者单位
Liu Fang The Second Monitoring and Application Center, China Earthquake Administration, Xi'an 710054, China 
Zhu Yiqing The Second Monitoring and Application Center, China Earthquake Administration, Xi'an 710054, China 
Zhao Yunfeng The Second Monitoring and Application Center, China Earthquake Administration, Xi'an 710054, China 
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
DOI:
分类号:
基金项目:Foundation item:funded by the Natural Science Foundation of China (61627824,41274083) and the Youth Foundation of Earthquake Prediction (2017010227).
Estimating Field Source Parameters of Gravity Change in North China Based on the Euler Deconvolution Method
Liu Fang,Zhu Yiqing,Zhao Yunfeng
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.
Key words:  Euler deconvolution  Potential field inversion  Gravity change  Structural index  North China