A swarm of more than 250 small earthquakes, centered on the northwest end of Yellowstone Lake, continues. The tremors have ranged from magnitude 3.8 down to barely detectable. Scientists are unsure what is causing them.
A swarm of more than 250 small earthquakes, centered on the northwest end of Yellowstone Lake, continues. The tremors have ranged from magnitude 3.8 down to barely detectable. Scientists are unsure what is causing them.