TsunamiReady is a National Weather Service designation for a local government, tribe, or facility that has completed the following preparedness steps: Hazard Mapping: Define local tsunami hazard zones ...

Any large movement of land that causes major displacement of ocean water—from earthquakes, landslides, or volcanic eruptions—can generate a tsunami. Tsunamis generated in Alaska have caused damage and ...

Coastal communities in Alaska face some of the most significant tsunami hazards in the United States. Tsunamis can strike within minutes of an earthquake or coastal landslide, making tsunami awareness ...

Communities are selected with consideration to their tsunami hazard exposure, location, infrastructure, availability of data, and willingness to incorporate the results into a hazard mitigation plan.

This event was felt throughout the Alaska Peninsula and southern Alaska.

Earthquakes in Southcentral Alaska are produced by a number of different tectonic features. (1) The strongest earthquakes in Southcentral Alaska are generated by the megathrust fault that marks the ...

A flying boat dropped Paddy Sherman’s mountaineering expedition at Lituya Bay on June 17, 1958. Over the next three weeks, the climbers made the second ascent of Mount Fairweather, a first ascent of ...

This event was felt throughout Kenai Peninsula and south-central Alaska. Earthquakes in Southcentral Alaska are produced by a number of different tectonic features. (1) The strongest earthquakes in ...

Seismicity in Southwest Alaska is very sparse. Known faults include the Iditarod-Nixon Fork and the western Denali Fault. Neither fault system has documented historical or Holocene earthquake activity ...

Early on August 10, 2025 the Earthquake Center received reports from people out boating of a mysterious local tsunami in the Endicott Arm area of Southeast Alaska, with waves of 10–15 ft near Harbor ...

On July 16, 2025, at 12:37 PM Alaska time, a magnitude 7.3 earthquake struck offshore of the Alaska Peninsula region (Figure 1), two years after a previous magnitude 7.2. This area has been active ...

The Yakutat microplate is the latest addition to the assemblage of accreted terranes that make up southern Alaska. The microplate was transported northward along margin-parallel transform faults, ...