Yellowstone Joins Earthquake Storm

By Douglas V. Gibbs

After a couple of very noticeable rumblers in Southern California, and hundreds of aftershocks have rattled the southland, the swarm of earthquakes now includes a 4.8 magnitude quake causing some shaking at the Yellowstone National Park.  The earthquake was strong enough to be felt by border towns in Montana.  Though used to smaller quakes, since Thursday the national park has experienced over 25 tremblers.

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Northern Yellowstone National Park shook by 4.8 earthquake, part of swarm since Thursday - Fox News