You know that very special rock you couldn’t resist picking up and taking home? The one with the uncanny shape, the surprising colors, the strange veins? On Saturday, you can take that rock to a ...

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 ...

Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF. Visit NAP.edu/10766 to get more information about this ...

Add Yahoo as a preferred source to see more of our stories on Google. Oct. 3—September saw an increase in earthquake activity at Mount Adams, according to the U.S. Geological Survey (USGS) Cascades ...

Scientists have begun a long overdue study of Glacier Peak in Snohomish County – the second most explosive volcano in the Cascades after Mount St. Helens – in what they hope will lead to badly needed ...

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 ...

The coordinated military attack on Iran has ignited intense debate across the world, including among community members in Portland. Happy Valley dog rescued from retention pond with help of thermal ...

Add Yahoo as a preferred source to see more of our stories on Google. An aerial view of the Crater Lake Caldera in Oregon. Obviously, visible lava spewing from a volcano’s caldera, like Hawai’i’s ...

Whenever Mt. Hood erupts, Portland will be glad to have David George. As a U.S. Geological Survey mathematician, George models landslides and lahars at the Cascades Volcano Observatory in Vancouver, ...

SEATTLE — Mount St. Helens stood silent for over a century in Washington’s Cascade Range, but that all changed 45 years ago when the sleeping giant woke up and erupted into Pacific Northwest history.

A "swarm" of earthquakes began at Mount Rainier in Washington in the early morning hours on Tuesday with hundreds of quakes detected so far, making it the largest such event at the volcano since 2009.