An official website of the United States government. Here's how you knowHere's how you know
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.
Latest Earthquake | Chat Share
We partner with dozens of Federal, State, and local governments, Tribes, and non-governmental organizations to provide reliable, unbiased data and data interpretation to the citizens of California and neighboring States.