Research on dynamics patterns and parameter characters of crustal deformation field before and after strong earthquake |
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| Authors: | Shuo-Yu Zhou Shun-Ying Shi Yun Wu Guo-Hua Yang Zheng-Yuan Li and Ruo-Bai Wang |
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| Institution: | (1) Institute of Seismology, State Seismological Bureau, 430071 Wuhan, China;(2) The First Crustal Deformation Monitoring Center, State Seismological Bureau, 300180 Tianjin, China |
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| Abstract: | Based on the dynamic monitoring data of crustal deformation, the parameter evolution for the dynamics pattern and fractal dimension of crustal deformation field and the integral activity level of many faults etc. before and after the Tangshan (1976) and Lijiang (1996) strong earthquakes and others are studied by using the method of pattern dynamics. It is exposed that two time space characters, the ordered dimension drop of the deformation field and the accelerated motion of multi fault before an earthquake, are probably caused by the deformation localization and fault softening after the seismogenic process enters the nonlinear stage. They could be an important seismic precursor if they occurred repeatedly before strong earthquakes. |
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| Keywords: | crustal deformation dynamic pattern process of dimension drop accelerative motion of fault seismic precursor |
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