Yellowstone recorded more than 1,000 earthquakes in the first half of the year, according to the U.S. Geological Survey, with seismic activity doubling in the past month.
But the area remains otherwise quiet.
Too quiet.
Yellowstone recorded more than 1,000 earthquakes in the first half of the year, according to the U.S. Geological Survey, with seismic activity doubling in the past month.
But the area remains otherwise quiet.
Too quiet.