Gridded earthquake rates (a-grids)

A seismic hazard model for South America, based on a smoothed (gridded) seismicity model, a subduction model, a crustal fault model, and a ground motion model, has been produced by the U.S. Geological Survey. These models are combined to account for ground shaking from earthquakes on known faults as well as earthquakes on un-modeled faults. Seismicity rates are estimated by counting historical earthquakes in a grid with a cell dimension of 0.1 degrees in latitude and longitude. These gridded earthquake rates are smoothed using a 50 kilometer fixed length smoothing kernel. Separate rate models were developed for the craton and active tectonic regions for earthquake depths between 0 and 50 km. Gridded rates for earthquakes with depths greater than 50 km were done separately.

Data e Risorse

Campo Valore
accessLevel public
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datagov_dedupe_retained 20220721212438
identifier USGS:59822ea8e4b0e2f5d463bb0f
metadata_type geospatial
modified 20200818
old-spatial {"type": "Polygon", "coordinates": [[[-85.0, -70.0], [-85.0, 15.0], [ -20.0, 15.0], [ -20.0, -70.0], [-85.0, -70.0]]]}
publisher U.S. Geological Survey
publisher_hierarchy Department of the Interior > U.S. Geological Survey
resource-type Dataset
source_datajson_identifier true
source_hash de8df6e6437b5315d10eb7304f19f40d5bcd41e7
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spatial {"type": "Polygon", "coordinates": [[[-85.0, -70.0], [-85.0, 15.0], [ -20.0, 15.0], [ -20.0, -70.0], [-85.0, -70.0]]]}
theme {geospatial}
Gruppi
  • AmeriGEOSS
  • National Provider
  • North America
Tag
  • amerigeo
  • amerigeoss
  • argentina
  • bolivia
  • brazil
  • chile
  • ckan
  • colombia
  • earthquake
  • ecuador
  • french-guiana
  • geo
  • geoss
  • guyana
  • hazard
  • national
  • north-america
  • panama
  • paraguay
  • peru
  • risk
  • seismic
  • south-america
  • suriname
  • trinidad-and-tobago
  • united-states
  • uruguay
  • usgs-59822ea8e4b0e2f5d463bb0f
  • venezuela
isopen False
license_id notspecified
license_title License not specified
maintainer Ken Rukstales
maintainer_email rukstales@usgs.gov
metadata_created 2025-11-22T03:25:06.663025
metadata_modified 2025-11-22T03:25:06.663030
notes A seismic hazard model for South America, based on a smoothed (gridded) seismicity model, a subduction model, a crustal fault model, and a ground motion model, has been produced by the U.S. Geological Survey. These models are combined to account for ground shaking from earthquakes on known faults as well as earthquakes on un-modeled faults. Seismicity rates are estimated by counting historical earthquakes in a grid with a cell dimension of 0.1 degrees in latitude and longitude. These gridded earthquake rates are smoothed using a 50 kilometer fixed length smoothing kernel. Separate rate models were developed for the craton and active tectonic regions for earthquake depths between 0 and 50 km. Gridded rates for earthquakes with depths greater than 50 km were done separately.
num_resources 2
num_tags 29
title Gridded earthquake rates (a-grids)