Excellent information for anyone wishing to visit and enjoy active volcanoes safely. Subsequent state-scale compilations, such as those by Johns and others, (1982), Stickney and Bartholemew (1987), and Hecker (1993) provided some supporting database and were the first true fault compilations. The Nevada Bureau of Mines and Geology released two tools to aid residents and state and local officials in locating faults and estimating potential losses from earthquakes.Organizations of all sizes have embraced digital transformation. If you expect that your search will result in a large number of results (more than 40), you can reduce the amount of time to obtain those results by limiting the number of results on each page at the bottom of the search form.There are three basic types of search fields: those with (1) pull-down menus, (2) text, and (3) numeric. )This database contains information on faults and associated folds in the United States that demonstrate geological evidence of coseismic surface deformation in large earthquakes during the past 1.6 million years (Myr). This fault map of Nevada shows the seismic potential of the state. These map compilations, however, did not provide much supporting data. In 1992, the USGS agreed to help compile maps and fault descriptions for countries in the Western Hemisphere (North, Central, and South America, as well as Australia and New Zealand). In addition, we provide narrative comments that clarify, justify, or expound upon these parameters.
The Quaternary fault and fold data for the United States has relied heavily on the past contributions, and on new efforts by State geological surveys and the U.S. Geological Survey.The most recent effort began in 1990 in support of the International Lithosphere Program (ILP), which formed Working Group II-2. Please use the following format according to the USGS Publishing Standards (The reference information about a fault in New Mexico viewed online on Jan 9, 2019 would look like:This website contains information on faults and associated folds in the United States that are believed to be sources of M>6 earthquakes during the Quaternary (the past 1,600,000 years). This numeric identifier allows us to clearly cite multiple-same year publications for authors.This table includes the definitions of classes used in the compilation of Quaternary faults, liquefaction features, and deformation (Crone and Wheeler, 2000).Although seismicity maps and earthquake catalogs show the past 100 to 150 years of felt and instrumental earthquakes, many faults in the United States have return times of thousands to tens of thousands of years for surface faulting events. For example, if you want to see the youngest and most active prehistoric faults, one would search for faults that have moved in the past 15,000 years at rates>5 mm/yr.Complete as few or many of the fields as you wish. The database is intended to be the USGS’s archive for historic and ancient earthquake sources used in current and future probabilistic seismic-hazard analyses.Our website presents—for the first time—a single source that summarizes important information on paleoseismic (ancient earthquake) parameters. These data are compiled from thousands of journal articles, maps, theses, and other documents, as referenced herein. Maps of these geologic structures are linked to a database containing detailed descriptions and references. For more...This map gives an overview of geologically young faults and is intended to help in evaluation of the potential activity of faulting nationally. Probabilistic seismic hazard assessment for the state of California; 1996; OFR; 96-706; Petersen, M. D.; Bryant, W. A.; Cramer, C. H.; Cao, Tiaquing; Reichle, M. S.; Frankel, A. D.; Lienkaemper, J. J.; McCrory, P. A.; Schwartz, D. P. Maps of major active faults, Western Hemisphere, International Lithosphere Program (ILP), Project II-2; guidelines for U.S. database and map, June 1993; 1993; OFR; 93-338; Haller, K. M.; Machette, M. N.; Dart, R. L. This broad research initiative resulted in new maps and studies of Quaternary faults. Because there are many contributors to the database, the citation will depend on which data you are using. Static maps were made by Susan Rhea (USGS), Richard Dart, and Damon Sather*. Nevada is one of the most seismically active states in the country, ranking third after California and Alaska. The search capabilities described below will allow the user to sort the data on a variety of fields (geographic, structural, time of movement, slip rate, etc.). Adam DuBrowa/FEMA. Quaternary Fault and Fold Database for the Nation; 2004; FS; 2004-3033; Geological Survey (U.S.)
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