Studying tree rings helped scientists pinpoint when Mount Rainier last sent a lahar down its steep slopes, which could help ...

A big, messy surprise greeted Yellowstone National Park early Saturday morning, just as winter officially began. At around 9:23 a.m., a powerful mud eruption took place at the Black Diamond Pool in ...

Scientists on the AKMA3 ocean expedition discovered an exceptional underwater feature consisting of a mud volcano in the middle of a large crater 80 miles south of Norway's Bear Island. The volcano ...