Tsunamis

Announcing Updated and New Tsunami Products

Decorative map of California

July 2021

New Tsunami Maps for California

It's July and we've updated six more tsunami hazard area maps. We now have updated maps for 13 of the state's 20 coastal counties. The latest maps cover the counties of Orange, Santa Barbara, San Luis Obispo, San Francisco, Santa Clara, and Contra Costa.

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.

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.

A city destroyed by the Tōhoku tsunami.

March 11, 2021

California Remembers the 2011 Japan Earthquake and Tsunami, Part 1

This first installment in our three-part retrospective examines the 2011 event, and the lessons California learned that are helping us prepare for the next one.

An intact house floating in the ocean. Washed out to sea by the Tōhoku tsunami.

March 11, 2021

California Remembers, Part 2: Impacts in Japan

Explore the impacts from the earthquake and tsunami in Japan with an in-depth and unique perspective from California tsunami scientists.

A California beach community.

March 11, 2021

California Remembers, Part 3: Impacts in California

Discover how the 2011 tsunami impacted California and set the course for improvements to tsunami resiliency.

Browse all of our Tsunami Products

Recommended content from some of our Partners

Get Tsunami Alerts

National Oceanic and Atmospheric Administration tsunami web site

at the NOAA tsunami web site

Partner Highlight

Redwood Coast Tsunami Work Group web site

A partner of the California Tsunami Program, the Redwood Coast Tsunami Work Group remembers the 2011 Tōhoku-oki Tsunami on their web page. Explore their videos, testimonies, and other fantastic resources devoted to this remembrance.

Get the latest TsuInfo Alert Newsletter

TsuInfo Alert Newsletter

How to Contact Us

California Geological Survey Tsunami Program

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

About the California Tsunami Program

The California Geological Survey (CGS) provides geologic and seismic expertise to the public, other state government offices, such as the California Governor’s Office of Emergency Services (Cal OES), and local government agencies (cities and counties). For tsunami hazards, CGS works closely with Cal OES and the Tsunami Research Center at the University of Southern California to produce statewide Tsunami Hazard Area Maps and preparedness information for California. 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.

Preparation • Response • Recovery • Mitigation

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