Dunno, really. Just found a webbie archive full of em,
this was a 6 mega-bit sooopah GIF in multi colours wiv graphs n bars n
alsorts, I just simplified it for prettiness. I believe it was ocean wave
movement.
(
..wil,
Mon 27 Jun 2005, 1:25,
archived)
also the west to east
movement at all latitudes seems a bit unusual
(
polio,
Mon 27 Jun 2005, 1:31,
archived)