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.