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:

Know Your Tsunami Hazard in Your Community

These community-specific brochures distill information from the scientific inundation, pedestrian travel time, and maritime response guidance reports into a handy, quick reference. The brochures include maps with community-designated safety information, as well as links for local and statewide tsunami preparedness information. The brochures are rack-card size for easy display, and a great safety resource for both locals and visitors.

This project is ongoing. More communities will be available in the future.

Know Your Tsunami Hazard in Valdez (brochure-format PDF) (page-by-page PDF)

Know Your Tsunami Hazard in Unalaska (brochure-format PDF) (page-by-page PDF)

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 27 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

These documents provide response guidance in the event of tsunamis for small vessels such as recreational sailing and motor vessels, and commercial fishing vessels.
Find a community report.

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.
Find a community report.

 

Tsunami News

From Mars research to earthquakes in Alaska, postdoctoral researcher Ezgi Karasözen has covered a lot of ground. She received her bachelor’s and master’s degrees in Turkey, then earned a second master’s degree and PhD at the Colorado School of Mines.

At the Earthquake Center, Karasözen’s first project focused on data from four small seismic arrays across Alaska (Figure 1). The arrays were established to detect nuclear test explosions, but the data hadn’t been utilized much for earthquake monitoring. “There was a huge interest in the 1960s when this technology was first developed, but then people lost interest,” Karasözen said. The stations in these arrays are very closely spaced—about 3 miles (5 km) apart—much tighter than other arrays in the state. The grid of former Transportable Array stations, for example, is spaced about 43 miles (70 km) apart.