Skip to main content
U.S. flag

An official website of the United States government

Driftwood Bay, Umnak Island, Alaska

Detailed Description

In the Fox Islands of Alaska, Driftwood Bay on Umnak Island faces the deep-sea trench formed by the Alaska-Aleutian subduction zone. Geological clues to a history of eight Aleutian tsunamis in the past 2,000 years lie beneath the coastal lowlands of Driftwood Bay. Read more at


Public Domain.

Photo taken by Rob Witter, U.S. Geological Survey