Mount St. Helens Lets Off Some Steam, Volcano Emits Impressive Plume That's Visible 50 Miles Away - CBS News: "Like a giant smokestack, percolating Mount St. Helens let loose a billowing steam plume easily seen Tuesday in downtown Portland, Ore., about 50 miles away.
Cold weather combined with the volcano's ongoing release of water vapor to make the display particularly impressive, scientists said. Mount St. Helens has been undergoing a low-key eruption since September 2004. "
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