Old Faithful Geyser erupts on average every 90 minutes, though the range can be 50 to 127 minutes. Each eruption lasts at least a minute, sometimes over 5 minutes, and spews at least 3,700 gallons of ...
JACKSON, Wyo. (AP) — Until recently, Bob Smith had never witnessed two simultaneous earthquake swarms in his 53 years of monitoring seismic activity in and around the Yellowstone Caldera. Now, Smith, ...
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