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.
March 11, 2021
Appropriate for all ages, our updated multimedia guide is packed with videos, images, and maps.
A scientific perspective of the event, including details of what happened in Japan and subsequently in California.
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.
Explore the impacts from the earthquake and tsunami in Japan with an in-depth and unique perspective from California tsunami scientists.
Discover how the 2011 tsunami impacted California and set the course for improvements to tsunami resiliency.
at the NOAA tsunami 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.
TsuInfo Alert Newsletter
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
Tsunamis Home Page
Tsunami Maps and Data
Tsunami Technical Reports
What to do Before, During, and After a Tsunami
Tsunami Educational Materials and FAQ
Remembering the 2011 Tōhoku-oki Earthquake and Tsunami