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April is Tsunami Awareness Month in Hawaiʻi. Click here for 2025 Hawaiʻi Tsunami Awareness Month Events
*NEW* April 29, 2025 - University of Hawaiʻi: News Release; News Story
*NEW* April 29, 2025 - KITV News: Preparing for a tsunami: UH shares new 2025 tsunami preparedness video
Since the 1990s, Hawaiʻi has used April as Tsunami Awareness Month. Federal, State, and Local government agencies, the Pacific Tsunami Museum, and other non-profit organizations team together to sponsor awareness and outreach events aimed at sustaining awareness of Hawaiʻi's tsunami hazards. The April 1, 1946 (April Fool's day) tsunami from the Aleutian islands surprised the State, which was without a tsunami warning system, killing 158 persons. As a result, the US started the US Seismic Sea Wave Warning System in 1949, which today is known as the Pacific Tsunami Warning Center (PTWC).
For PTWC Tsunami Warning messages, click here.
For State and County Emergency Information, click here.
For more Tsunamis, follow ITIC on Facebook.
Tsunami Facts is a statewide brochure, customized by County, and in multiple languages. The ʻFactsʻ are the most common outreach questions. Languages cover the non-English speaking population, who speak a language other than English at home in Hawaiʻi (U.S. Census Bureau, Hawaiʻi DBEDT, 2016).
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Signs of Tsunami (Walker 2018) |
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Tsunamis in Hawai‘i |
Tsunamis in Hawaiʻi |
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| Tsunami Deaths and Damage 1812-2022 |
Tsunami Essentials |
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Links
Federal / National
- Hawaiʻi Tsunami Warnings - Summary information
- Hawaiʻi Tsunami Warnings - PTWC Messages
- US TWC (PTWC, NTWC) Message Definitions
- US NTHMP Tsunami Information Guide
- Pacific Tsunami Warning Center (PTWC)
- International Tsunami Information Center (ITIC)
- American Red Cross, Hawaiʻi State Chapter
- USGS Hawaiian Volcano Observatory
- Civil Air Patrol, Hawaiʻi Wing , US Air Force Auxillary
State
- Hawai‘i Emergency Management Agency (HI-EMA)
County
- Kaua‘i Emergency Management Agency Management Agency (including Ni‘ihau, KEMA)
- City & County of Honolulu, Dept of Emergency Management (DEM)
- Maui County Emergency Management Agency (including Moloka‘i, Lana‘i, Kaho‘olawe)
- Hawaiʻi County Civil Defense Agency (HCCDA)
Historical Information
- Pacific Tsunami Museum (PTM)
- Hawaiʻi Historical Tsunami Photos
- Global Historical Tsunami Database (NOAA NCEI, World Data Service)