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.
The map above shows seismicity (orange circles) and seismic monitoring stations (triangles). Seismic stations that have been recently upgraded are emphasized in red.
Public Domain.
