by Photo courtesy of the California Geological Survey

The California Geological Survey has recently updated its Tsunami Hazard Area Maps for seven counties, including San Diego, to help users indicate how far inland water could expand in a worst-case scenario. 

California coastal counties of Marin, Napa, San Diego, Santa Cruz, Solano, Sonoma, and Ventura received updates that detail specific evacuation routes to higher ground. According to a news release, the California Tsunami Hazard Maps and Data are based on the state’s 2009 Tsunami Inundation Maps for Emergency Planning and enhanced high-resolution,975-year return period probabilistic tsunami inundation model results. 

According to the Geological Survey, California has been struck by more than 150 tsunamis since 1800. The most recent tsunami is from a 2011 earthquake in Japan, which caused about $100 million in damage to California ports. Santa Cruz and Ventura counties sustained about $10 million in damage to their harbors from a January volcanic eruption in Tonga. 

Visit the California Department of Conservation to view the map and for more information. 


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