U.S. Geological Survey

Two quakes in Anchorage, Alaska, followed the 3.3 magnitude quake in Lincoln County.

The U.S. Geological Survey has updated its threat assessments of the 161 active volcanoes in the United States, ranking 18 of them as a "very high threat" because of what's been happening inside them and their proximity to people.
Yellowstone National Park's volcano ranks as a "high th…

Nationwide, 330 million park visitors directly spent $18.2 billion within 60 miles of a national park.

The U.S. Geological Survey reported no injuries or property damage.

Earthquakes occur frequently in and around Yellowstone.