The Washington Geological Survey’s tsunami hazards database
contains a variety of feature classes representing tsunami inundation extents
and important information for evacuation and planning purposes. The database
includes inundation extents for a variety of earthquake scenarios, including a
Cascadia subduction zone magnitude 9.0 scenario, known as the 2,500 year event
or L1 scenario. Other scenarios include modeled inundation extents for local
crustal earthquakes on the Tacoma and Seattle faults. The database also provides
coastal evacuation routes and reference points such as hospitals, fire
stations, clinics, police stations, assembly areas, and tsunami sirens.
This data provides the service areas for Washington State Department of Children, Youth, and Families (DCYF) offices as defined by DCYF staff and managers.
Important: Some records in this dataset carry copyright requirements. If you use a record that has the Copyright field populated, then you are required to include the provided copyright text on any maps, charts, reports, or any other information products that you create or derive from this data.
The Washington Geological Survey’s seismogenic features
database contains seven point, line, and polygon feature classes pertaining to
seismogenic features in Washington State: (1) active faults (faults with
demonstrable Quaternary-age activity); (2) active folds (folds with
demonstrable Quaternary-age activity); (3) paleo-seismic trench locations
(excavations made for use in studying and documenting potentially active
faults); (4) PNSN earthquakes (earthquake catalog data obtained from the
Pacific Northwest Seismic Network, featuring earthquakes greater than magnitude
1.0 and greater than 25 km in depth); (5)
relocated earthquakes (a subset of the PNSN earthquakes of accurately relocated
earthquake hypocenters); (6) relocation processing areas (areas used to group
clusters of earthquakes during hypocenter relocation processes); and (7) historical
earthquake damage with a related table of photos showing damaged structures.
The Washington Geological Survey’s hazardous minerals
database contains information about naturally occurring hazardous minerals in
Washington. The database includes feature classes showing locations where mercury,
arsenic, and asbestos have been reported. Potential asbestos hazard is represented
with polygons showing the extent of geologic units likely to contain asbestos
minerals. The database also contains a feature class showing the locations of
A polygon feature class provides a statewide classification
of radon hazard based on 1:100,000-scale geologic mapping. Approximately 57,000
uniquely identifiable rock and soil areas were classified into high, variable,
or low risk of producing radon gas. A classification of high indicates rock
types that may contain uranium; medium (variable) indicates the underlying
geology may contain uranium-bearing rocks, such as granitic clasts dropped by
glaciers; and low indicates the geology or soil is unlikely to contain uranium.
Important: DSHS reserves the right to alter, suspend, re-host, or retire this service at any time and without notice. This is a map service that you can use in custom web applications and software products. Your use of this map service in these types of tools forms a dependency on the service definition (available fields, layers, etc.). If you form any dependency on this service, be aware of this significant risk to your purposes. You might consider mitigating your risk by extracting the source data and using it to host your own service in an environment under your control. Typically, DSHS Enterprise GIS staff will provide notification of changes via the Comments RSS capability in ArcGIS Online. You should subscribe to this RSS feed to monitor change notifications: https://www.arc