An official website of the United States government. Here's how you knowHere's how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Latest Earthquake | Chat Share
Stratigraphic contact marking uplift of Montague Island, caused by slip on the Patton Bay fault system during the 1964 M9.2 Great ALaska Earthquake.