基于应变率场的全球地震活动特征模拟探索

Abstract

Abstract: Relationship between strain rate field observed by GPS and global distribution of strong earthquakes is analyzed in this work. How to recognize the characteristics of global seismic activities with space observation technology? A preliminary model of cellular automata that could simulate the global seismic activities both in time and space has been established based on the results of global strain rate field provided by GSRM Program. The grid of the model is evenly divided, which is consistent with that of GSRM. Status of each cell is its strain state, and its adjustment is according to the evolution rules. Maximum shear strain criterion is adopted in the evolution of the cellular automata. The threshold for cells in surface expansion is 80% of that for those in compression. The preliminary model could in general simulate the main characteristics of the distribution of the global seismic activities. It could exhibit in general the global distribution of weak and active tectonic activities. Although the preliminary cellular automata model needs to be improved in many aspects, the result suggests the possibility of modeling the general features of the rather complicated global seismic activities based on the strain rates obtained by GPS and other observations.

Key words: Simulation of global seismic activity, Global strain rate, Cellular Automata

CLC Number:

P315.7

WANG Wu-xing, SHI Yao-lin. A Preliminary Simulation of Global Seismic Activities based on Global Strain Rate[J]. EARTHQUAKE, 2013, 33(4): 123-134.

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A Preliminary Simulation of Global Seismic Activities based on Global Strain Rate

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