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.
Dr. Jacob Lowenstern, Scientist-in-Charge of the Yellowstone Volcano Observatory during 2002-2017. Photo by Patrick Allard
Public Domain.
