http://ralphmuehleisen.com/animations.html
http://virga.sfsu.edu/gif/sathts_pac_snd_00.gif
• http://www.stormsurfing.com/cgi/display.
cgi?a=npac_wave
http://www.lajollasurf.org/gblpac.html
The effect of distance on gravitational attraction.
http://en.wikipedia.org/wiki/Bay_of_Fu