Some residents in the Upper Midwest were surpr...  ...n by an earthquake last night. The United States Geological Survey reported that the earthquake, which had an estima...  ...urces for information on earthquakes is the U. S. Geological Survey...

The U.S. Geological Survey has an extensive database of lava-related events...  ...time. They represent photographs of a variety of geological phenomena and eruptive events, chosen for their c...