Where Volcanoes Are Born Most volcanoes form at the boundaries of Earth's tectonic plates, which are huge slabs of crust and upper mantle that fit together like puzzle pieces. Think of these plates as ...

Mountain building, also known as orogenesis, is a geological process that involves the formation and uplift of large, elevated landforms, known as mountains. The term "orogenesis" comes from Greek ...

An odd-looking cloud formation over Mount Rainier drew curious eyes from social media users Wednesday as the volcano looked as if it was giving a warning before some sort of event, but experts quickly ...

Social media was abuzz after people in the greater Seattle metro area saw what appeared to be venting on Mount Rainier on Wednesday. A video of the most glaciated peak in the contiguous U.S. was ...

The discovery of Tamu Massif, a gigantic volcano located about 1,000 miles east of Japan, made big news in 2013 when researchers reported it was the largest single volcano documented on earth, roughly ...

The Olympus Mons volcano on Mars shares morphological similarities with active volcanic islands on Earth, suggesting that it formed when a vast ocean once occupied the planet's northern lowlands. A ...

From the top of Mammoth Mountain, the view is incredible, but we're focused on the Red Cones, about 2,000 feet below. These cinder cones are the two youngest volcanos in this chain. They last erupted ...

NEAR MT. RAINIER, Wash. — Once again, some persuasive pictures of Mount Rainier have led a few to wonder if the volcano was beginning to erupt earlier this month. Spoiler alert: no, Mount Rainier was ...

Countries with the Most Volcanoes: Volcanoes are powerful openings in the Earth’s crust where hot lava, ash, and gases escape from below the surface. Some countries have more volcanoes because they ...

Rain will probably never fall on Mars’ giant volcano, Olympus Mons (our condolences to the MMC). But a glittering swath of frost covers the Martian mountaintop on chilly mornings, according to new ...