Gravity changes and surface deformations due to faults with different geometry |
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| Authors: | Zhi-Ming Bai Chun-Yong Wang and Chong-Yang Shen |
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| Institution: | (1) Institute of Geophysics, China Seismological Bureau, 100081 Beijing, China;(2) Institute of Earthquake, China Seismological Bureau, 430071 Wuhan, China |
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| Abstract: | Based on the formulae of the gravity changes and surface deformations raised by the dislocation of a point source,the gravity changes and deformations caused by the dislocations of fault with arbitrary geometry are computed by using numerical method. The results show that both of the dislocation and the geometry of the fault plane are the basic elements that determine the gravity and deformation effects. Gravity changes, vertical deformations and apparent vertical deformations induced by the dislocation are alike in their characteristic patterns. The similarities and differences of these patterns provide us a probability in acquiring the gravity and deformation anomalies due to faulting from the observed data. Thus the geometric and kinematic features of the earthquake-generating faults can be appropriately distinguished and evaluated. |
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| Keywords: | numerical method fault dislocations arbitrary geometry gravity changes and deformations |
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