Research on the completeness magnitude(Mc)of regional seismic networks is crucial for understanding their monitoring capabilities,assessing the reliability of earthquake catalogs,and studying seismic activity characteristics.This research helps to determine the minimum reliable magnitude range,and provide valuable references for earthquake monitoring and research efforts.In this study,we focus on the earthquake catalog characteristics and requirements for Jiangsu province and its neighboring areas,taking into account the construction and development of seismic stations within the regional seismic network.We employ the magnitude-num-ber method and multi-parameter approaches to investigate and analyze the temporal variations of the minimum completeness magnitude(Mc)of seismic activity recorded by this network.Using the Entire Magnitude Range(EMR)method,we further explore the spatial distribution characteristics of earthquakes.Our findings indicate that the overall trend of MC values in Jiangsu and its surround-ing areas can be divided into two distinct stages:from 1970 to 2008,MC values predominantly ranged from ML 1.0 to ML2.2,while from 2009 to 2022,MC values mainly fell between ML0.5 and ML 1.5.Inland areas of Jiangsu Province exhibited MC values ranging from ML l.0 to ML2.5 during the period of 1970-2008,and from ML0.5 to ML2.0 during 2009-2022.In contrast,the MC values in the coastal Yellow Sea area of Jiangsu primarily ranged from ML 2.0 to 3.0 throughout the entire period from 1970 to 2022.Overall,the seismic monitoring capabilities of the Jiangsu regional seismic network appear to be improving over time.
关键词
最小完整性震级MC值/区域地震目录/江苏省区域测震台网
Key words
Minimum completeness magnitude MC value/Regional earthquake catalog/Jiangsu provincial seismic network
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