Yellowstone National Park's geological history is one of the most intensely studied in North America. A new geologic unit ...

For centuries, glaciers have sat like frosty crowns atop slumbering volcanoes, keeping Earth’s fury tucked safely beneath ...

Roughly 252 million years ago, Earth experienced its deadliest known extinction. Known as the Permian–Triassic Mass ...

The tremors were too weak for humans to feel. But the frequency of them is the most since researches started monitoring the mountain.

The so-called earthquake swarm at Mount Rainier dwindled Friday but has surpassed the last large event at the volcano in 2009 ...

An Alaskan volcano that has been inactive for more than 100 years is showing signs of rumbling, according to scientists.

A volcanic eruption sank Aenaria nearly 2,000 years ago. Now, underwater tours and ongoing excavations are bringing Ischia's ...