基于Levenberg-Marquardt方法的内蒙古及邻区地震烈度影响场改进技术

Abstract

Abstract: Attenuation relation of seismic intensity is fitted by using 152 complete isoseismic lines from 65 earthquakes greater than M_S4.0 from 1940 to 2015 in Inner Mongolia and neighbouring areas. Meanwhile, based on the difference of land form and geological structure characteristic,the areas are divided into eastern regions, western regions and the central regions. And then, intensity attenuation relationships are established separately by using Levenberg-Marquardt method and elliptic attenuation model. Comparisons are made between the respected earthquake influence field model of North China and computed results. The result shows that the relation obtained well represents the features of earthquake damage distribution in the areas, and has positively meaning to guiding the loss assessment immediately after a desastrous earthquake.

Key words: Seismic intensity, Earthquake influence field, Attenuation relationship, Levenberg-Marquardt method, Inner Mongolia

CLC Number:

P315.7

YANG Yan-ming,JIANG Li-xin,WANG Zhen-xiang. An Improved Technology for Estimating Seismic Influence Field based on Levenberg-Marquardt Method[J]. EARTHQUAKE, 2017, 37(3): 117-126.

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An Improved Technology for Estimating Seismic Influence Field based on Levenberg-Marquardt Method

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