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 massive rafts floating ...

Mount Lassen, in the southern Cascades, erupted on May 22, 1915, 65 years almost to the day before Mount St. Helens. Also known as Lassen Peak, the mountain is the southernmost active volcano in the ...

Bulletin: ...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 9 AM EDT SUNDAY... * WHAT...Temperatures between 34 and 38 degrees will result in some areas of frost ...

Volcanoes are often framed as nature’s most violent spectacles, yet some of the largest on Earth ooze lava quietly for years without a single dramatic blast. Scientists have now pulled together a ...

Some volcanoes can produce eruptions so powerful they release oceans of dust and toxic gases into the air, blocking out sunlight and changing a planet’s climate for decades. By studying the topography ...