| 基于MGR模型修正我国大陆中强以上地震的震级-频度关系和确定震级极限值div |
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| 引用本文： | 任雪梅,高孟潭,俞言祥.基于MGR模型修正我国大陆中强以上地震的震级-频度关系和确定震级极限值div[J].地震学报,2012,34(3):331-338. |
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| 作者姓名： | 任雪梅 高孟潭 俞言祥 |
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| 作者单位： | 1） 中国北京100081中国地震局地球物理研究所2） 中国银川750001宁夏回族自治区地震局 |
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| 基金项目： | 宁夏回族自治区科技攻关计划项目 |
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| 摘 要： | 从理论上推导了修正的古登堡-里克特模型的震级上限的确定方法， 应用常用的两种模型对我国分区域进行了震级-频度关系的修正和震级极限值的确定. 结果表明, 我国大陆存在非线性的震级-频度关系， 传统的NGR模型不能反映非线性的震级-频度关系， 而MGR模型能反映适合非线性和线性的震级-频度关系， 因此MGR模型适合我国各研究区中强以上地震的震级-频度关系. 当震级 频度关系为非线性时， 用MGR模型确定的震级极限值较准确．
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| 关 键 词： | 震级-频度关系 震级上限 震级极限值 非线性b值& |
Modification of magnitude-frequency relation and magnitude limit determination based on MGR model for moderate-strong earthquakes in Chinese mainland |
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| Ren Xuemei
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Gao Mengtan
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Yu Yanxiang.Modification of magnitude-frequency relation and magnitude limit determination based on MGR model for moderate-strong earthquakes in Chinese mainland[J].Acta Seismologica Sinica,2012,34(3):331-338. |
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| Authors: | Ren Xuemei Gao Mengtan Yu Yanxiang |
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| Institution: | 1) Institute of Geophysics, China Earthquake Administration, Beijing 100081, China2) Earthquake Administration of Ningxia Hui Autonomous Region, Yinchuan 750001, China |
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| Abstract: | In this paper the method of determining upper magnitude limit following modified Gutenberg-Richter model is derived.Based on two commonly used models the modified magnitude-frequency relations and upper magnitude limits for various regions of Chinese mainland are determined.The result shows that there are nonlinear magnitude-frequency relations for earthquakes in Chinese mainland and the traditional normal G-R model can not reflect nonlinear feature of actual magnitude-frequency relations.While MGR model is suitable for expressing both linear and nonlinear magnitude-frequency relations,and is more suitable for dealing with moderate-strong earthquakes in various regions of Chinese mainland.When the magnitude-frequency relation is nonlinear,the upper magnitude limit determined by using MGR model is more reasonable. |
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| Keywords: | magnitude-frequency relation upper limit magnitude magnitude limit nonlinear b-value |
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