The original, authoritative dataset has been modified by OES for the Know Your Hazards tool where: Evacuate = 'Yes, Tsunami Hazard Area'

About the Maps

California Tsunami Hazard Area Maps and Data are compiled with the best currently available scientific information and represent areas that could be exposed to tsunami hazards during a tsunami event. They are based on the State of California 2009 Tsunami Inundation Maps for Emergency Planning and enhanced high-resolution, 975-year return period probabilistic tsunami inundation model results. The boundaries of tsunami hazard areas are defined by the California Geological Survey. These limits have been extended to reflect potential local tsunami sources not considered in probabilistic analysis and are also modified to reflect the practical need to define limits that coincide with geographic features or city streets. Local stakeholders, including emergency managers, first responders, and subject matter experts, are consulted on the placement of the final hazard area in places that would help the public and government safely evacuate during a tsunami event. The following document explains the methodology for determining inundation and evacuation areas.

Tsunami Hazard Area Map Methodology (PDF)

Disclaimer

California Official Tsunami Hazard Area Maps and Data are intended for local jurisdictional, coastal evacuation planning uses only. They are not legal documents and do not meet disclosure requirements for real estate transactions nor for any other regulatory purpose. The California Governor's Office of Emergency Services (Cal OES), the University of Southern California (USC), AECOM Technical Services, and the California Geological Survey (CGS) make no representation or warranties regarding the accuracy of the maps nor the data from which the maps were derived. The State of California shall not be liable under any circumstances for any direct, indirect, special, incidental, or consequential damages with respect to any claim by any user or any third party on account of or arising from the use of these maps.