I have a few questions about calderas, specifically, the Yellowstone and Long Valley Calderas. I read in http://environment.newscientist.com...-only-lukewarm.html?feedId=online-news_rss20" that the Yellowstone Caldera could be dying, but may have enough juice left for one "catastrophic" eruption. What would the nature of that eruption be? Also, what are the odds of either the Long Valley or Yellowstone Calderas causing a catastrophic eruption in our lifetimes (say, the next 100 years)? I've heard that the Yellowstone one is on a 600,000 year cycle and its last eruption was 650,000 years ago. So does that mean we can expect another catastrophe from it soon? Is there any way for us to forecast when these supereruptions will come?