Data Release for the 1999 Alaska Seismic Hazard Model

Gridded ground motion data and mapped gridded ground motion values are available for the 1999 Alaska Seismic Hazard Model. Probabilistic seismic hazard data and maps of Alaska and the Aleutians for peak ground acceleration (PGA) and 0.2, 0.3, and 1.0 second spectral acceleration at probability levels of 2 percent in 50 years (annual probability of 0.000404) and 10 percent in 50 years (annual probably of 0.0021), assuming firm rock soil conditions at 760 m/s, are available. Development of the 1999 Alaska Seismic Hazard Model is documented in the USGS Open-File Report 99-36 (https://doi.org/10.3133/ofr9936).
This dataset is considered a legacy dataset. The original dataset was uploaded to the USGS website at the time of publication of the seismic hazard model (1999) but was later moved over the the USGS ScienceBase Catalog (2019). The original dataset was assumed to be complete and accurate, but may contain inconsistencies when compared to more recent, actively maintained datasets.

Data and Resources

Field Value
accessLevel public
bureauCode {010:12}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
datagov_dedupe_retained 20220722114234
identifier USGS:5db05ee3e4b0b0c58b56c193
metadata_type geospatial
modified 20200818
old-spatial {"type": "Polygon", "coordinates": [[[-180.0, 48.0], [-180.0, 71.999999999999], [ -125.0, 71.999999999999], [ -125.0, 48.0], [-180.0, 48.0]]]}
publisher U.S. Geological Survey
publisher_hierarchy Department of the Interior > U.S. Geological Survey
resource-type Dataset
source_datajson_identifier true
source_hash 0b85bee4b82bead823f188e1bb1fd479df3887e7
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-180.0, 48.0], [-180.0, 71.999999999999], [ -125.0, 71.999999999999], [ -125.0, 48.0], [-180.0, 48.0]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • alaska
  • amerigeo
  • amerigeoss
  • ckan
  • earthquake-hazards-program
  • ehp
  • geo
  • geologic-hazards-science-center
  • geoss
  • ghsc
  • ground-motion
  • hazard-curve
  • hazard-map
  • national
  • national-seismic-hazard-model
  • national-seismic-hazard-model-project
  • nehrp-site-classes
  • north-america
  • nshm
  • nshmp
  • spectral-period
  • u-s-seismic-hazard-maps
  • united-states
  • usgs
  • usgs-5db05ee3e4b0b0c58b56c193
isopen False
license_id notspecified
license_title License not specified
maintainer Shumway, Allison M.
maintainer_email ashumway@usgs.gov
metadata_created 2025-11-22T08:59:23.538540
metadata_modified 2025-11-22T08:59:23.538544
notes Gridded ground motion data and mapped gridded ground motion values are available for the 1999 Alaska Seismic Hazard Model. Probabilistic seismic hazard data and maps of Alaska and the Aleutians for peak ground acceleration (PGA) and 0.2, 0.3, and 1.0 second spectral acceleration at probability levels of 2 percent in 50 years (annual probability of 0.000404) and 10 percent in 50 years (annual probably of 0.0021), assuming firm rock soil conditions at 760 m/s, are available. Development of the 1999 Alaska Seismic Hazard Model is documented in the USGS Open-File Report 99-36 (https://doi.org/10.3133/ofr9936). This dataset is considered a legacy dataset. The original dataset was uploaded to the USGS website at the time of publication of the seismic hazard model (1999) but was later moved over the the USGS ScienceBase Catalog (2019). The original dataset was assumed to be complete and accurate, but may contain inconsistencies when compared to more recent, actively maintained datasets.
num_resources 2
num_tags 25
title Data Release for the 1999 Alaska Seismic Hazard Model