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  • 标题:Missing Earthquake Data Reconstruction in the Space‐Time‐Magnitude Domain
  • 本地全文:下载
  • 作者:Angela Stallone ; Giuseppe Falcone
  • 期刊名称:Earth and Space Science
  • 电子版ISSN:2333-5084
  • 出版年度:2021
  • 卷号:8
  • 期号:8
  • 页码:n/a-n/a
  • DOI:10.1029/2020EA001481
  • 语种:English
  • 出版社:John Wiley & Sons, Ltd.
  • 摘要:Short term aftershock incompleteness (STAI) can strongly bias any analysis built on the assumption that seismic catalogs have a complete record of events. Despite several attempts to tackle this issue, we are far from trusting any data set in the immediate future of a large shock occurrence. Here, we introduce RESTORE (REal catalogs STOchastic REplenishment), a Python toolbox implementing a stochastic gap‐filling method, which automatically detects the STAI gaps and reconstructs the missing events in the space‐time‐magnitude domain. The algorithm is based on empirical earthquake properties and relies on a minimal number of assumptions about the data. Through a numerical test, we show that RESTORE returns an accurate estimation of the number of missed events and correctly reconstructs their magnitude, location, and occurrence time. We also conduct a real‐case test, by applying the algorithm to the MW 6.2 Amatrice aftershocks sequence. The STAI‐induced gaps are filled and missed earthquakes are restored in a way which is consistent with data. RESTORE, which is made freely available, is a powerful tool to tackle the STAI issue, and will hopefully help to implement more robust analyses for advancing operational earthquake forecasting and seismic hazard assessment.
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