Astronomers capture a massive black hole waking up like a 'cosmic volcano' after lying dormant for 100 million years.

Stay informed about Yellowstone's recent seismic activity, including earthquakes and geothermal eruptions in Biscuit Basin.

Deep in the cosmos, about a billion light-years away, a monster with a gargantuan appetite has woken up. For roughly 100 ...

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

Since episode 40 ended, scientists at the U.S. Geological Survey recorded three more swarms between Tuesday and Wednesday.