FLAGSTAFF — Just 30 minutes from downtown Flagstaff, Sunset Crater Volcano National Monument offers a striking look at northern Arizona’s explosive past. The cinder cone, now standing over 8,000 feet ...

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 ...

The tiny Mojave Desert outpost of Amboy has seen a lot of change over the past 50 years or so. First, Route 66 was bypassed by Interstate 40, directing travelers away from the businesses that had ...

Black cinder, at top, is highly porous small hard bits expelled by fountaining lava without much exposure to oxygen before cooling. Hawaii’s commercial supply of the material is nearing depletion ...

Volcanoes are a powerful force of nature. There are about 1500 active volcanoes on our planet right now. A volcano is an opening in the Earth's crust that allows lava and other volcanic matter to ...

From the ever-active Kilauea in Hawaii to the infamous Mount St. Helens in Washington, the United States has some of Earth's most notable (and notorious) volcanoes. And despite their obvious dangers, ...

The state of Arizona and its picturesque landscapes have been shaped by a geological history of volcano eruptions across the region. Some of the oldest volcanic rocks in the state are 1.8 billion ...

Note: This is the fourth in a series of six Guest Opinions commemorating the Craters of the Moon National Monument Centennial. While southern Idaho’s vast Snake River Plain is lauded and renowned ...