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.
Close-up of alert level bars for landslides (left) and liquefaction for the Loma Prieta earthquake.
Public Domain.
Close-up of alert level bars for landslides (left) and liquefaction for the Loma Prieta earthquake.
