A video of bison running down a road in Yellowstone sparked viral internet rumors this week that the park's super volcano is about to explode. The rumors gained so much traction that Yellowstone officials felt the need to respond. Spokesman Al Nash says all is well, and that the animals were simply migrating.
An explosion at a coal mine northeast Wyoming was big enough to register on seismographs on the scale of a small earthquake.
Some people in Gillette reported feeling the ground shake from 16 miles away.
The U.S. Geological Survey recorded the blast at 11:11 a.m. Tuesday. The blast happened in the area of Cloud Peak Energy's Cordero Rojo Mine southeast of Gillette and registered as large as a magnitude 4.5 earthquake.