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.
Example of the Keanakāko‘i Tephra sequence exposed on the southeast side of Kīlauea Volcano's summit caldera showing some of the identified units labeled with the revised nomenclature scheme. USGS photo by D. Swanson.
