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 of Antarctica shows that the seismic stations (green triangles) are mostly on the periphery of the continent. Only two stations are in the interior.
Public Domain.
