Just FYI, In the latest National Geographic (August '09) there's an article (pp 56-69) on the Yellowstone hotspot, and its life over the last 18 million years. The article has some amazing schematics, and also has a map showing the eastward progression of the hot plume over its lifetime. The article doesn't presume to answer the question everyone wants to know--when next to run away in terror--but it is pretty informative on a lot of other questions--worth a look.Please Register or Log in to view the hidden image!
This is an interesting topic and there may well be some big event in our life times at Yellowstone. Can you find a link to the schematics or scan them and post an image?