Tsunamis

Announcing Updated and New Tsunami Products

Decorative map of California

October 7, 2022

New Tsunami Maps for California

We now have updated tsunami hazard area maps for all 20 of the state's coastal counties. The latest maps cover the counties of San Diego, Ventura, Santa Cruz, Marin, Sonoma, Napa, and Solano.

California Tsunami Preparedness Guide

March 11, 2021

California Tsunami Preparedness Guide

Appropriate for all ages, our updated multimedia guide is packed with videos, images, and maps. September is National Preparedness Month...this is a good time to determine if you live in, work in, or visit a Tsunami Hazard Area, and to prepare for a tsunami.

January 31, 2022

The Tonga Tsunami of January 15, 2022

Our summary of effects in California, and the state's response.

A city destroyed by the Tōhoku tsunami.

March 11, 2021

California Remembers the 2011 Tōhoku-oki Earthquake and Tsunami

Our three-part retrospective examines the 2011 event, and the lessons California learned that are helping us prepare for the next one.

Earthquake intensity map showing the level of shaking people felt in different parts of Japan.

March 11, 2021

The 2011 Tōhoku-oki Earthquake and Tsunami

A scientific perspective of the event, including details of what happened in Japan and subsequently in California.

Browse all of our Tsunami Products

Recommended content from some of our Partners

National Oceanic and Atmospheric Administration

Tsunami Alerts

The latest information from the U.S. Tsunami Warning Centers.

Redwood Coast Tsunami Work Group web site

Redwood Coast Tsunami Work Group

A valued partner of the California Tsunami Program, the Redwood Coast Tsunami Work Group offers a wealth of tsunami-related content.

TsuInfo Alert newsletter

TsuInfo Alert Newsletter

TsuInfo Alert is a bi-monthly newsletter that links scientists, emergency responders, and community planners to the latest tsunami research.

About the California Tsunami Program

The California Tsunami Program (CTP) is a collaboration between the the California Geological Survey (CGS) Tsunami Unit, the California Governor’s Office of Emergency Services (Cal OES), and entities at the local level (counties, cities, community workgroups). For tsunami hazard mapping, the CTP works closely with the Tsunami Research Center at the University of Southern California and others to produce statewide Tsunami Hazard Area Maps and preparedness information for California. The CGS is also the scientific representative for California on the National Tsunami Hazard Mitigation Program Coordinating Committee, a state and federal cooperative responsible for developing policies and standards for tsunami mitigation efforts in the United States and its territories.

How to Contact Us

California Geological Survey Tsunami Unit

California Geological Survey Tsunami Unit. The California Geological Survey is a division of the Department of Conservation.

Cal OES Tsunami Program

California Governor's Office of Emergency Services

Preparation • Response • Recovery • Mitigation

Web page by:
California Geological Survey - Seismic Hazards Program

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