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.
Hawaiian Volcano Observatory scientists map and measure ground cracks during the Kamoamoa eruption. USGS photo taken by N. Richter on March 6, 2011.
Public Domain.
