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"Washburn brings a new kind of terror. " - Marc CameronFIRST THE GROUND SHAKES . . . At Yellowstone National Park, earthquake tremors are common. But today, park scientist Tucker Mayfield detects something different: a disturbing new increase in activity - and intensity . . .THEN THE LAVA RISES . . . Lurking beneath the park's natural wonders, earth's largest supervolcano begins to awaken after 640,000 years. If - or when - it blows, two-thirds of the North American continent will be destroyed . . .NOW THE WHOLE WORLD TREMBLES . . . IN FEAR Racing against time, Tucker Mayfield mobilizes a team to evacuate all visitors from the park - including his family at the Old Faithful Inn. But when the earthquakes intensify, and the death toll rises, a shockwave of panic spreads across the nation.