More than a century has passed since the last eruptions of Mount Lassen and Mount Shasta, yet both remain active and ...

Smoke billows from the mouth of Mt. Shasta like a thunderous cough. Within moments, clear skies turn gray, and the sun vanishes behind thick, shifting layers of volcanic gas and ash. Visitors snap ...

Government scientists are classifying 18 U.S. volcanoes as a "very high threat" because of what's been happening inside them and how close they are to people. The U.S. Geological Survey is updating ...

California’s active volcanoes include Mount Shasta, Lassen Peak, Medicine Lake Volcano, Long Valley Caldera, Coso Volcanic Field, and Salton Buttes. Snow forecast for parts of N.J. increase to 2 to 7 ...

Sometimes the origins of certain natural formations remain a mystery, with their causes and timing remaining unknown for several decades or even centuries before science uncovers the truth. Even then, ...

MOUNT SHASTA, Calif. — Global warming is shrinking glaciers all over the world, but the seven tongues of ice creeping down Mount Shasta's flanks are a rare exception: They are the only known glaciers ...

Our western volcanoes : an overview -- Plates in motion : the ring of fire, hot spots, and supereruptions -- Magma and mountains : how volcanoes erupt and the landforms they build -- Glaciers on ...