中国西部走滑型活动断裂的地震破裂参数与震级的经验关系

doi:10.3969/j.issn.0253-4967.2011.03.008

摘要/Abstract

摘要：

为建立中国西部走滑型活动断裂的滑动速率、破裂参数与震级之间的经验关系,系统搜集和整理了中国西部地区30个大地震的震级以及发震断裂(段)的活动参数和破裂参数资料,包括断裂(段)长度、滑动速率、最大位错等及其不确定性。为考虑各种参数的不确定性,采用蒙特卡罗(Monte Carlo)方法,对各种参数进行最小二乘法回归分析,给出了这些参数之间的统计关系。与已有同类经验关系式的对比分析表明,文中给出的关系式,特别是考虑滑动速率的关系式,能够较好地反映各种参数之间的关系,更适用于活动断裂地震危险性分析。

关键词: 活动断裂, 滑动速率, 经验关系, 蒙特卡罗, 中国西部

Abstract:

In this paper,the relevant faulting and rupture-scale parameters of 30 large earthquakes were systematically collected and compiled,including fault length,slip rate,magnitude and their uncertainties.Considering the uncertainties of these parameters,10000 Monte Carlo realizations were generated consistent with the ranges of data,and for each a standard least-squares technique was used to find the coefficients of regressions.A comparative analysis with previous empirical relationships of the same type suggests that the empirical relationships developed in this research,especially the inclusion of fault slip rate in such regressions,are suitable very well for estimates of the seismic hazard on mapped active strike-slip faults in western China.

Key words: active fault, slip rate, empirical relation, Monte Carlo, western China

中图分类号:

P315.9

冉洪流. 中国西部走滑型活动断裂的地震破裂参数与震级的经验关系[J]. 地震地质, 2011, 33(3): 577-585.

RAN Hong-liu. EMPIRICAL RELATIONS BETWEEN EARTHQUAKE MAGNITUDE AND PARAMETERS OF STRIKE-SLIP SEISMOGENIC ACTIVE FAULTS ASSOCIATED WITH HISTORICAL EARTHQUAKES IN WESTERN CHINA[J]. SEISMOLOGY AND GEOLOGY, 2011, 33(3): 577-585.

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