Trippy, I've opened the link; your post is worded in such a way that I'm not sure if you're suggesting there is something we disagree on or not. I'm not aware of any disagreement. I am aware of the Magma Chamber- however, the topic on the O.P.'s premise is one of the Worst Case Scenerio (W.C.S.): a massive explosive eruption. While the content of the Magma Chamber beneath Yellowstones caldera is more than sufficient for an eruption (Even if the other conditions are not right for an eruption at this time), it is insufficient for the W.C.S. listed by the O.P. For the W.C.S., we must examine the Plume itself and its probability of influencing the massive eruption needed to fulfill Discovery Channel and other sources fearmongering of such an event. The journal you linked to, starting page 112, we can examine the history of the Yellowstone area and plume and positioning of the N.Amer. Plate in prehistoric times, moving forward to the present.. Moving along, crustal velocities, crustal composition and seismic velocities and interpretation. Follow that with density, strength and reclaiming of material by the crust (cooling) and we have a significant time interval for magma to cool and be reclaimed by the crust. Again- let me know if there's something we disagree on. I posted the Wikipedia image as a demonstration of how easily one can see the program, think the end of the world is coming, then go see an easily accessible image that appears to support that conclusion. It's why I also posted the University of Utah journal pdf early in the thread and two more journals in that post.