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
Learn about some of our barrier island research, deep sea "stepping stones," our 5000th sample at the Stellwagen Bank National Marine Sanctuary, and more in this July-August 2021 issue of Sound Waves.