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 technicians upgraded the Hualālai repeater station to lithium batteries, despite the chilly temperatures on Hualālai. USGS image by M. Warren.
Public Domain.
