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Current as of: 5/12/2026

Tsunami Hazard Mitigation

A tsunami is a series of waves that can be dangerous and destructive. They can be caused by underwater disturbances or earthquakes. When you hear a tsunami warning, move at once to higher ground and stay there until local authorities say it is safe to return home.
 
Go to high ground

What Can I Do Today?

Follow tsunami evacuation route signsIn case of earthquake, stay on high ground or inland

  • Be familiar with the tsunami warning signs. A rapid rise or fall in coastal waters and a large earthquake are both signs to an approaching tsunami.
  • Know the location of your local evacuation site. Most coastal communities have a designated area on high ground that the community will meet, e.g.: a school.
  • Know your community's warning siren or method of letting people know a tsunami is coming.
  • DO NOT go to the water to watch the tsunami come in!

For Schools & Educators

Following the 2004 Indian Ocean Tsunami, the ITIC compiled essential tsunami awareness materials to support government agencies, emergency managers, and educators. This DVD contains basic resources originally developed for the Pacific Tsunami Warning & Mitigation System (PTWS) in the 1990s-2000s, updated after 2004 to address tsunamis as a global hazard.

Materials like "Tsunami, the Great Waves," "Tsunami Warning!," and awareness posters are provided in customizable formats to meet local needs, cultures, and languages. The Tsunami Glossary 2008 is available upon request. You may freely use and modify these materials while retaining ITIC logos and credits, and adding your agency information. Please share your modified versions with us.

Files are available in PDF (low/high resolution), Word (.doc) for translation, and Adobe Illustrator (.ai) for design modifications. ITIC can assist with finalizing materials in the original layout design. Our goal is to provide all basic materials in English, French, and Spanish, with select resources in other languages contributed by Member States.

All materials are available by DVD upon request or downloadable from the ITIC website. Contact us at itic.tsunami@noaa.gov for additional requests or to contribute to our collection.

 

ITIC Tsunami Awareness and Education Materials

Good Tsunami Sites

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Tsunami Evacuation Maps

COMMUNITY TSUNAMI READY COMMUNITY DISTANT TSUNAMI POTENTIAL LOCAL TSUNAMI POTENTIAL TSUNAMI SIREN TSUNAMI EVACUATION PLAN POPULATION
Adak   High Yes Yes Yes 316
Akhiok   Medium Yes Yes Yes 80
Akutan   Medium Yes Yes Yes 713
Anchor Point   Medium Yes   Yes 1,845
Angoon   Low Yes     572
Atka   Medium Yes Yes Yes 92
Attu   Medium Yes     20
Chenega Bay Yes Medium Yes Yes Yes 86
Chignik Bay   Low Yes   Yes 103
Chignik Lagoon   Medium Yes   Yes 79
Chiniak   Medium Yes     50
Coffman Cove   Low Yes     199
Cold Bay Yes Medium Yes   Yes 103
Cordova Yes Medium Yes Yes Yes 2,571
Craig Yes Medium Yes Yes Yes 1,397
Diomede   Low Yes     146
Edna Bay   Medium Yes     49
Elfin Cove   Medium Yes   Yes 32
False Pass   Medium Yes   Yes 64
Gambell   Low No     649
Gustavus   Medium Yes   Yes 429
Haines   Low Yes   Yes 1,811
Hollis   Low Yes     139
Homer Yes Medium Yes Yes Yes 3,946
Hoonah   Low Yes   Yes 860
Hydaburg   Low Yes   Yes 382
Hyder   Low Yes     97
Ivanof Bay   Medium Yes     22
Juneau/Douglas   Low Yes   Yes 30,711
Kake   Low Yes Yes   710
Karluk   Medium Yes Yes Yes 27
Kasaan   Low Yes   Yes 39
Kenai   Low Yes Yes Yes 7,100
Ketchikan Yes Low Yes Yes Yes 7,922
King Cove Yes Medium Yes Yes   792
Klawock   Low Yes     854
Kodiak City Yes Medium Yes Yes Yes 13,913
Kupreanof   Low No     23
Larsen Bay   Medium Yes Yes Yes 115
Metlakatla   Medium Yes   Yes 1,375
Myers Chuck   Low Yes     21
Nanwalek   Medium Yes Yes Yes 177
Nelson Lagoon   Low No   Yes 83
Nikolski   Medium Yes Yes Yes 39
Nome   Low No Yes   3,598
Old Harbor   Medium Yes Yes Yes 237
Ouzinkie   Medium Yes Yes Yes 225
Pelican   Low Yes   Yes 163
Perryville   Medium Yes Yes Yes 107
Petersburg   Low Yes Yes   3,224
Point Baker   Medium Yes     35
Port Graham   Low Yes Yes Yes 171
Port Heiden   Low No     119
Port Lions   Medium Yes Yes Yes 256
Port Protection   Low Yes   Yes 63
Sand Point Yes Medium Yes Yes   952
Savoonga   Low No Yes   643
Saxman   Low Yes     431
Seldovia   Medium Yes Yes Yes 286
Seward Yes Medium Yes Yes Yes 2,830
Shemya   High Yes     27
Shishmaref   Low No     562
Sitka Yes Medium Yes Yes   8,835
Skagway Yes Low Yes Yes Yes 862
St. George   Medium Yes Yes Yes 152
St. Paul   Medium Yes Yes Yes 532
Tatitlek Yes Medium Yes   Yes 107
Tenakee Springs   Low Yes     104
Thorne Bay   Low Yes     557
Unalaska Yes Medium Yes     4,283
USCG Station Kodiak   Medium Yes      
Valdez Yes Low Yes Yes Yes 4,036
Whale Pass   Low Yes     58
Whittier Yes Low Yes   Yes 182
Woman's Bay   Medium Yes   Yes 666
Wrangell   Low Yes     2,308
Yakutat Yes Medium Yes   Yes 808

DISTANT SOURCE TSUNAMI HAZARD means the tsunami is generated so far away that the earthquake was not felt at all or only slightly. An estimate can be made of potential danger. Maximum runup heights would only be reached at the shoreline and the maximum distance inland only reached where the coast is low, flat, and unobstructed. "High" means possible runup to 50 foot elevation and reaching up to 1 mile inland. "Moderate" means possible runup to 35 foot elevation and inland up to 3/4 mile. "Low" means possible runup to 20 foot elevation and reaching up to 1/2 mile inland.

All listed communities may have a LOCAL TSUNAMI HAZARD which means a tsunami could be generated in nearby waters and reach your community before a formal warning could be transmitted. These waves may arrive in less than one hour and have historically been the highest, up to 100 foot or more. The estimated possible height in each community is difficult to determine. Coastal residents who feel a very strong earthquake (lasting over 30 seconds or if you have difficulty standing) should move to higher ground immediately.

Historic tsunami information and ongoing numeric studies indicate that tsunami flood threat along the western Alaska coast (Bering Sea) is very low, though there is a higher threat in some instances along the Pribilof Island coasts.  We have run a preliminary tsunami propagation model. Two hypothetical tsunami sources (earthquakes of Mw 9.0) were placed in the eastern and western parts of the Aleutian chain. The tsunami waves propagated through the Northern Pacific and into the Bering Sea. The continental shelf in the Bering Sea substantially dissipates tsunami energy and slows down the waves. As a result, tsunami waves arrive at Hawaii before they reach the Bering Sea coastline, which gives sufficient warning time to those communities. Higher amplitudes were calculated for St. George and St. Paul islands due to their proximity to the continental slope. The Bristol Bay area has only an estimated >1 meter wave height potential.