Study on dynamic change of gravity field in China continent

Zhu Yi-Qing; Liang Wei-Feng; Zhan, F. Benjamin; Liu Fang; Xu Yun-Ma; Guo Shu-Song; Liu Lian

doi:10.6038/j.issn.0001-5733.2012.03.010

Study on dynamic change of gravity field in China continent

Acta Geophysica Sinica, 2012, 55(3): 804-813.

DOI: 10.6038/j.issn.0001-5733.2012.03.010

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Summary

This paper reports preliminary results about gravity field changes in mainland China from 1998 to 2008 based on information derived from absolute and relative gravity observation data at stations of the Crustal Movement Observation Network of China (CMONOC). These results suggest that; (1) there existed significant inhomogeneity in the spatial-temporal distribution of gravity changes in China and partition phenomenon; (2) significant gravity changes appear to be concentrated in regions with active faults and associated with the preparation of large earthquakes; (3) the majority of large earthquakes (>= M(s)6. 8) in mainland China occurred in areas that exhibited significant differences of gravity changes of 90 X 10(-8)m . s(-2) or greater, and these earthquakes typically ruptured around the time when the trend of gravity change in the region showed signs of reversal.

Keywords

China Continent; Geodesy; Gravity; Tectonics; Seismology

Institution

China Earthquake Administration; Wuhan University

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