基于地震目录估计完备震级方法的数值实验

doi:10.6038/cjg20160416

CORC > 北京大学 > 地球与空间科学学院

	基于地震目录估计完备震级方法的数值实验; Numerical tests on catalog-based methods to estimate magnitude of completeness
	黄亦磊 ; 周仕勇 ; 庄建仓
刊名	地球物理学报
	2016
关键词	完备震级M_c b值地震目录完备性 Magnitude threshold of completeness b value Completeness of catalogues EARTHQUAKE CATALOGS DETECTION CAPABILITY THRESHOLD EXAMPLES NETWORK FAULT
DOI	10.6038/cjg20160416
英文摘要	本文将5种估计完备震级(magnitude of completeness,简记为M_c)的方法运用在三个不同模型产生的理论地震目录上,进而对比它们的优缺点.我们发现分段斜率中值分析法MBASS(The Median-based analysis of the segment slope)适用于不完备部分台网探测地震能力随震级变化快及监测能力在时间上存在不均匀性(heterogeneity)的目录中,但是要求目录包含大量的地震事件,而b值稳定法MBS(The M_cby b-value stability approach)则适合用于台网探测地震能力随震级减小衰减慢地震目录,但是比较费时.最大曲率法MAXC(The Maximum Curvature technique)和拟合优度测试法GFT(The Goodness-of-Fit Test)在使用时都低估M_c,需要加调整量.完整性震级范围法EMR(M_cfrom Entire Magnitude Range)则一般给出比较稳定、适中的M_c估计值.这种方法适用在地震数目少,且对地震丢失容忍度比较高的情况.在实践中针对不同性质的地震目录,我们希望这项研究能帮助研究者选择最合适估计完备震级M_c的方法,并指出了一些估计完备震级中应当避免的问题.; This study compares five methods for estimating the completeness magnitude threshold of earthquake catalogs through applying them to synthetic catalogs generated from 3 different models. We have found that the Median-based analysis of the segment slope (MBASS)method is suitable for catalogs recorded by networks whose detection ability improves rapidly with magnitude and for those with temporal heterogeneity if the amount of earthquakes is large enough. The M-c by b-value stability approach (MBS) is optimal in dealing with catalogs recorded by networks whose detection ability improves slowly with magnitude, but it is time-consuming. The Maximum Curvature technique (MAXC) &. The Goodness-of-Fit Test (GFT) method underestimate M-c and need an Me criterion. The M-c, from Entire Magnitude Range (EMR) method gives a moderate and stable M-c estimation. It is recommended when the amount of events is not large and the tolerance of missing events is relatively high. This study helps us to choose the optimal M-c estimation method in practice to cope with different earthquake catalogs and points out some potential problems caused by these methods.; 中国地震研究专项,中国国家自然科学基金; SCI(E); EI; 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); huangyilei@pku.edu.cn; zsy@pku.edu.cn; 4; 1350-1358; 59
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/437488]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	黄亦磊,周仕勇,庄建仓. 基于地震目录估计完备震级方法的数值实验, Numerical tests on catalog-based methods to estimate magnitude of completeness[J]. 地球物理学报,2016.
APA	黄亦磊,周仕勇,&庄建仓.(2016).基于地震目录估计完备震级方法的数值实验.地球物理学报.
MLA	黄亦磊,et al."基于地震目录估计完备震级方法的数值实验".地球物理学报 (2016).