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.
Aftershocks during the first week after the mainshock. Symbol size represents earthquake magnitude, and fill color represents depth. The crosses and letters indicated cross-sections not shown in this image.
Public Domain.
