Subsidence and Permanent Flooding Maps

Tsunami researchers examine historical earthquakes and study geologic records from prehistoric tsunamis to develop maximum credible earthquake and tsunami scenarios. The permanent flooding maps focus on near-shore dry land that may subside during the earthquake and be prone to flooding. This information is visualized in maps showing potential permanent flood zones to help communities make informed decisions.

The permanent flooding maps are part of the community inundation reports funded by the National Weather Service and National Oceanic and Atmospheric Administration through the National Tsunami Hazard Mitigation Program.

Published Reports

Chenega Bay and Northern Sawmill Bay
Chignik and Chignik Lagoon
Cordova and Tatitlek
King Cove and Cold Bay
Nikolski
Seward
Unalaska and Akutan
Valdez
Whittier
Yakutat