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Supervolcano may be brewing beneath Mount St Helens

If the structure beneath the three volcanoes is indeed a vast bubble of partially molten rock, it would be comparable in size to the biggest magma chambers ever discovered, such as the one below Yellowstone National Park. <p><a href="http://feedads.g.doubleclick.net/~at/llgPtXYnZVaK0OH6ka2smvcK8dk/0/da"><img src="http://feedads.g.doubleclick.net/~at/llgPtXYnZVaK0OH6ka2smvcK8dk/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~at/llgPtXYnZVaK0OH6ka2smvcK8dk/1/da"><img src="http://feedads.g.doubleclick.net/~at/llgPtXYnZVaK0OH6ka2smvcK8dk/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds2.feedburner.com/~r/digg/popular/~4/g_gj9gpwHn8" height="1" width="1"/>