地震学报2017，Vol.39Issue(3)：315-329,15.DOI:10.11939/jass.2017.03.002
南北地震带地震台网监测能力评估的不同方法比较研究
Comparision among different methods for assessing monitoring capability of seismic station in North-South Seismic Belt
摘要
Abstract
In order to explore the differences and causes of the methods for assessing monitoring capability of different seismic networks,this paper chooses the "probability-based magnitude of completeness" (PMC) and "entiremagnitude-range" (EMR) methods which are the relatively frontier in the world,and the "magnitude-maximum distance" method applied routinely in China Seismic Networks to compare minimum magnitude of completeness (marked as Mp,MeEMR and Mr,respectively,obtained by the above three methods) in the North-South Seismic Belt region during the time span from 1 October 2008 to 17 September 2015.The consistency of data observation quality is also considered,which is not paid enough attention in previous studies,and the selected seismic events are recorded by at least three stations.The results show that the assessing results of the three methods are significant different,and the difference between any two methods can reach to ML2.0 for some specific positions in the North-South Seismic Belt.The Mp result is significantly lower than the results by the other two methods in the region to the north of 32°N,low Mr value by the magnitude-maximum distance method is only related to the higher density seismic station region.In general the statistical relationship is McEMR＜Mp＜Mr.Furthermore,the detection capability score results reveal that the station operational level and the completeness in earthquake record analyses are the main reasons that the Mp significantly differs from the results calculated by other methods,and data quality constraint criteria such as the amount constraint of recorded stations whether used or not,will cause significantly different results of the EMR method from other methods.Considering practical situation of the seismic network in operation and calculation principles of the three assessment methods,the PMC method is more reasonable and recommended for earthquake monitoring ability assessment work.关键词
最小完整性震级Mc/地震检测能力/基于概率的完整性震级(PMC)方法/完整性震级范围(EMR)方法Key words
minimum magnitude of completeness/seismic detection capability/probability-based magnitude of completeness (PMC)/entire-magnitude-range (EMR)分类
天文与地球科学引用本文复制引用
王亚文,蒋长胜..南北地震带地震台网监测能力评估的不同方法比较研究[J].地震学报,2017,39(3):315-329,15.基金项目
中国科学院国际合作局对外合作重点项目(131551KYSB20160002)资助. （131551KYSB20160002）
