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.
Particle tracks representing other examples that may be Kelvin waves. Each point corresponds to the particle position in one frame and is separated from the next one by 29 ms. The red triangle represents the end of the track, to clarify the direction of motion.
