Determination of Temporal-Spatial Distribution of the Regional Minimum Magnitudes of Completeness: Application to the Longmenshan Fault Zone

• 责任者：Long Feng （School of Earth and Space Sciences ; USTC ; Hefei 230026 ; China） ; Wen Xueze
• 刊名：Earthquake
• 出版年：2009
• 卷期：29(3)
• 关键词：震级—频度比值 ; magnitude-frequency ratios ; 龙门山断裂带 ; Longmenshan Fault Zone
• 页码：p.27-36
• 图表：8 illus., 22 refs.
• 分类号：0500
• issnNo：ISSN1000-3274
• isbnNo：CN11-1893/P

In this paper, the goodness-of-fit test (GFT) method for estimating the minimum magnitude of completeness (MC) is introduced first and then applied to determine the temporal-spatial distribution of MC of the Longmenshan fault zone, Sichuan Province, and its surrounding area. Finally, advantage and problems of the method in application are summarized and discussed. The study suggests that based on the assumption that the G-R relationship has the power-low distribution, the GFT method is used to estimate a minimum magnitude of completeness MC through fitting a G-R relationship for a set of observed data by adjusting various minimum magnitudes gradually from small to big ones and eventually taking that minimum magnitude when the fitted G-R relationship can match best the set of observed data to be the result.