Figure 6.
Mean velocity: total (a); in the Peripheral area (b); in the Intermediate area (c); in the Central area (d).
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.