On Tuesday, hundreds of earthquakes were detected, with depths ranging from 1.2 to 3.7 miles below the summit.

Catastrophic volcano could soon erupt on the Pacific NorthwestMore than 400 earthquakes rattled Washington's Mount Rainier ...

In 40 years Ryanair has transformed itself from a small loss-making regional airline into the biggest airline group in Europe ...

The U.S. Geological Survey said it and other agencies were monitoring the situation and would issue additional alerts "as needed." ...

Giant, large-scale eruptions can have more serious impacts. One such event contributed to the demise of the dinosaurs 66 ...