TSUNAMI HAZARD MITIGATION FOR ALASKA

Coastal Alaska communities live with the most serious tsunami risk in the United States. Historically, tsunamis generated by earthquakes in Alaska have caused damage and loss of life along the West Coast and across the Pacific. Here in Alaska, though, tsunamis generated by nearby earthquakes represent “near-field” hazards. This means people may have minutes rather than hours to reach safety.

The Earthquake Center works to make our coastal communities safer by providing state and local officials with the best possible information for addressing the tsunami hazards faced by their communities. We tackle community safety through the following projects:

Inundation Mapping Project

In partnership with the Alaska Division of Geological and Geophysical Surveys and the Alaska Division of Homeland Security and Emergency Management, we evaluate and map potential inundation using numerical modeling of tsunami wave dynamics. The maps incorporate the best tsunami science available at the time of publication.
Find a community report.

Click on the map to explore our Tsunami Hazard Map Tool. Zoom to your area of interest by selecting a community and map type. You can also toggle between map and satellite views at the top right. At present, the interactive map includes flow depths and inundation boundaries for 26 at-risk communities, and hazard extent for an additional 27 communities.
Frequently Asked Questions about the Tsunami Hazard Map Tool

Click to enter the Tsunami Hazard Map Tool

 

Maritime Response Guidance Documents

These documents provide response guidance in the event of tsunamis for small vessels such as recreational sailing and motor vessels, and commercial fishing vessels.
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Pedestrian Travel Time Maps

For communities that have well-defined tsunami scenarios, it is possible to estimate the amount of time required to evacuate to high ground by foot.
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Tsunami News

This evening’s M7.8 earthquake [7/21/20, 10:12 PM AKDT] occurred on the well-known subduction zone interface off the Alaska Peninsula. Strong shaking has been reported from Perryville and Sand Point to King Cove and Cold Bay. Weak shaking was felt more than 500 miles away in the MatSu and Anchorage areas. At this time we are not aware of significant damage caused by the shaking, and the National Tsunami Warning Center has called off its various warnings. However, this story will surely continue to unfold as we learn more.