Utah Quaternary Faults

The Utah Geological Survey Quaternary Fault and Fold Database and Map of Utah is a compilation of existing information on faults and fault-related folds considered to be potential earthquake sources (i.e., “active” faults and folds). The faults and folds contained in the database are those considered to have been sources of large earthquakes (about magnitude 6.5 or greater) during the Quaternary Period (past 2.6 million years); these geologic structures are the most likely sources of large earthquakes in the future. The database is intended to be a comprehensive source of the most current information available for characterizing active faults and folds in Utah for seismic-hazard analysis. This version of the database incorporates fault data from geologic maps and other documents formally published through 2020, along with several additional faults. More information on faults and earthquake hazards in Utah is available at http://geology.utah.gov/hazards/earthquakes-faults/utah-faults.The database was compiled and attributed using ESRI ArcGIS geographic information system software. In general, the database attribute conventions follow those of the Quaternary Fault and Fold Database of the United States maintained by the U.S. Geological Survey (USGS).犹他州地质调查局第四纪断层与褶皱数据库及犹他州地图，是针对被视为潜在地震震源（即“活动”断层与褶皱）的现有断层及断层相关褶皱信息的汇编。本数据库收录的断层与褶皱，均为在第四纪（距今260万年以来）时期曾引发大型地震（震级约6.5及以上）的地质构造；此类构造亦是未来犹他州发生大型地震的最主要潜在震源。该数据库旨在为犹他州活动断层与褶皱的地震危险性分析提供全面且最新的特征化信息来源。本次发布的数据库版本整合了截至2020年正式发布的地质图及其他文献中的断层数据，同时新增了若干断层。如需了解更多犹他州断层与地震灾害相关信息，可访问http://geology.utah.gov/hazards/earthquakes-faults/utah-faults。本数据库通过ESRI ArcGIS地理信息系统软件完成编译与属性赋值。总体而言，该数据库的属性规范遵循由美国地质调查局（U.S. Geological Survey, USGS）维护的美国第四纪断层与褶皱数据库的相关标准。