I find this program to be so helpful in seeing the ‘patterns’ of earthquake activity.
It is 3D, and you can spin the Earth, zoom in/out, and there a bunch of controls that will keep you busy for hours.
EARTHQUAKE 3D. Go to the link, download it (about 2 seconds), then run it.
It is awesome and yet a very small program.
Best of all, IT’S FREE.
http://www.wolton.net/quake.html
Wonderful link - thanks.