Name: quaternary_fault_lines

Display Field: fault_name

Type: Feature Layer

Geometry Type: esriGeometryPolyline

Description: On the USGS website, maps of these geologic structures are linked to a database containing detailed descriptions and references. 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 files were updated on November 3rd, 2010 with the most recent version of the Quaternary Faults features.Starting in the early 1970s, mainly in response to national concerns about the siting of nuclear reactors, scientists needed to locate active and Quaternary faults and document their characteristics. The descriptions contain information on geographic, geologic, and paleoseismic parameters that are deemed critical to making geologic-based assessments of seismic hazards. In addition, we provide narrative comments that clarify, justify, or expound upon these parameters. Many of the comments in the database provide justification for the paleoseismic parameters that were chosen to characterize the faults and folds.Terms of UseAccess Constraint: None (Public Domain Information) Use Constraint: None (Public Use)

Service Item Id: 9e491f403db349e6b417af77a56919bc

Copyright Text: U.S Geological Survey The project coordinator is Michael Machette (USGS). The database structure was created by Kathy Haller (USGS) and an early version of the web interface and search engines were created by Larry Mayer (formerly of the University of Miami at Oxford, Ohio). The GIS data was engineered and maintained by Richard Dart (USGS). The fault and fold traces were digitized mainly by Richard Dart, with help from Dean Hancock*. Static maps were made by Susan Rhea (USGS), Richard Dart, and Damon Sather*. The graphic web browser and ArcIMS module (still under development) were created by Susan Rhea, Damon Sather*, Karen Morgan*, and John Cox*. Much of the reference database and entry of data into the text database was done with the able assistance of Philly Morrow, Meredith Frey, and Kelli Clark (*, all former student interns or contractors to the USGS). Compilers and cooperators are listed on the web page (http://earthquake.usgs.gov/qfaults/contrib.html). Compilers are those who described faults or folds for the database. Cooperators are those who assisted with the development of digital fault data (traces), the database structure, or the geographical information system (GIS) interfaces.

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Supported Query Formats: JSON, geoJSON, PBF

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Type ID Field: null

Fields:

• st_length(shape) ( type: esriFieldTypeDouble, alias: st_length(shape) )
• objectid_1 ( type: esriFieldTypeOID, alias: objectid_1 )
• objectid ( type: esriFieldTypeInteger, alias: objectid )
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Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

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