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.
Photogeologic map of Mount St. Helens dome. Photograph annotated with identified features within the volcano's crater. November 29, 2004.
Public Domain.
