At the risk of this blog becoming all volcanoes, all the time, I bring you... more volcanoes! Two of my favorite geobloggers wrote mustn't-miss posts on some of our Cascades volcanoes. They showcase ...

New research offers clues as to why Mount St. Helens is one of the most explosive volcanoes in the Cascade range and why it stands apart from the chain of other Cascade volcanoes. Scientists from the ...

Mount Rainier - one of many volcanoes found in the Cascade Range - is reflecting in the Reflection Lakes in Mount Rainier National Park in Washington State, USA. A seismic survey challenges the ...

Unlike old soldiers, old volcanoes seemingly don't even fade away, much less die, with researchers discovering magma chambers under cones previously classed as dormant after thousands of years of ...

New Cornell University led-research challenges the long-standing belief that active volcanoes have large magma bodies that are expelled during eruptions and then dissipate over time as the volcanoes ...

Mount Shasta, a steep-sided Cascade Range stratovolcano in Northern California, looms above Little Glass Mountain, a thick obsidian flow erupted from the Medicine Lake shield volcano about 1,000 years ...

EUGENE, Ore. - Mount St. Helens caught science a little by surprise. A volcano hadn't erupted in the contiguous United States (U.S. excluding Alaska and Hawaii) since California's Lassen Peak in early ...

Thirty-one years ago, John Ewert was a college graduate fascinated with Mount St. Helens. Today, he's the new scientist in charge of the U.S. Geological Survey's Cascades Volcano Observatory in ...

For decades, scientists believed that magma chambers beneath volcanoes were transient, forming before an eruption and then ...