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.
Stress values (in megapascals) are plotted on a color map scale where deep red indicates areas of highest stress and dark blue indicates no stress. Red arrows indicate the areas of peak stress.
