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基于MGR模型的我国大陆地区各地震带1970年以来震级-频度关系和震级上限
任雪梅1, 高孟潭2, 张纳莉3
1.宁夏回族自治区地震局,银川市北京东路244号750001;2.中国地震局地球物理研究所,北京100081;3.河北省地震局流动测量队,河北保定071000
摘要:
本文利用两种常用的NGR和MGR模型,对我国大陆地区1970年以来各地震带的震级一频度关系和震级上限进行了修定。结果表明,MGR模型能很好地描述非线性的震级.频度关系,因此该模型更适合于我国大陆地区各地震带M13.0以上地震的震级-频度关系,用MGR方法拟合确定震级上限时,样本量越高拟合的结果越准确。
关键词:  地震带 震级-频度关系 震级上限 非线性
DOI:
分类号:
基金项目:宁夏回族自治区攻关项目“宁夏及邻区中强以上地震震后趋势判定及强余震的预测研究”(102164170)资助
Magnitude-frequency relation and magnitude limit of seismic zones based on the MGR model in Chinese mainland since 1970
Ren Xuemei1, Gao Mengtan2, Zhang Nali3
1.Earthquake Administration of Ningxia Hui Autonomous Region, Yinchuan 750001, China;2.Institute of Geophysics, China Earthquake Administration, Beijing 100081, China;3.Mobile Survey Team of Earthquake Administration of Hebei Province, Baoding 071000, China
Abstract:
In this paper, modification on magnitude frequency relation and magnitude limit determination based on NGR and MGR (commonly used models) are studied in various seismic zones in Chinese mainland since 1970. The results indicate that the MGR model can be used to describe the nonlinear frequency relations so that the magnitude frequency relations of MGR model is more suitable to magnitude frequency relation of ML 〉3.0 earthquakes of various seismic zones in Chinese mainland. The result of the fitting high sample size of the magnitude limit determination based MGR model is accurate.[著者文摘]
Key words:  Seismic zone Magnitude-frequency relations Magnitude limit Nonlinearity