Webcams are also used in Yellowstone National Park ... was an earthquake swarm that occurred over an 11-day span in December 2008–January 2009 in the north part of Yellowstone Lake.

(AP) — A surprise eruption in Yellowstone National Park shot steam ... 1991 and after the magnitude 7.2 Hebgen Lake earthquake 40 miles (64 kilometers) away in 1959. Yellowstone is centered ...