四川地区及周缘地震目录完整性分析  

Completeness Analysis of Earthquake Catalog in Sichuan Area and Surrounding Areas

作　　者：罗文静 

机构地区：[1]成都理工大学数理学院,四川 成都

出　　处：《理论数学》2023年第10期2775-2779,共5页Pure Mathematics

摘　　要：四川地区是中国地震活动频繁的地区之一,地震目录的建立对于了解地震活动、评估地震危险性以及制定地震防灾措施具有重要意义。然而,由于地震数据的来源多样性和数据质量的差异性,四川地区的地震目录存在一定的不完整性。因此,本研究旨在通过对四川地区及其周缘历年来的地震数据进行整理和分析,建立一份统一的地震目录,并对统一的地震目录进行除丛,完整性分析采用Stepp (1972)提出的方法来确定不同震级范围内数据完整的时间间隔。分析结果表明:在震级范围为2.5 ≤ MW < 3,3 ≤ MW < 3.5和MW ≥ 4的情况下,数据分别对于过去13年(2010~2023),37年(1986~2023)和55年(1968~2023)是完整的。这些研究对于了解四川地区及其周缘的地震分布以及该地区的地震危险性评估提供了重要的依据。Sichuan is one of the areas with frequent seismic activity in China. The establishment of earthquake catalog is of great significance for understanding seismic activity, assessing seismic risk and formulating earthquake disaster prevention measures. However, due to the diversity of seismic data sources and differences in data quality, the earthquake catalog in Sichuan is somewhat in-complete. Therefore, this study aims to establish a unified earthquake catalog by sorting and ana-lyzing seismic data in the Sichuan area and its surrounding areas over the years, and to de-clump the unified earthquake catalog. The integrity analysis is based on the method proposed by Stepp (1972) to determine the complete time intervals for data in different magnitude ranges. The analysis results show that the data are complete for the past 13 years (2010~2023), 37 years (1986~2023) and 55 years (1968~2023) respectively in the magnitude range of, and. These studies provide important basis for understanding the distribution of earthquakes in and around Sichuan and the assessment of seismic risks in the region.

关 键 词：地震目录 震级标度 除丛 完整性分析 

分 类 号：P31[天文地球—固体地球物理学]