“It is also possible that an eruption could occur with little or no additional warning,” the Alaska Volcano Observatory ...

But in the distant past, it was a tumultuous planet that spawned the largest volcano in the solar system. Olympus Mons might not look impressive in the top-down photos you've seen in the past ...

Mount Spurr near Anchorage has been showing signs of unrest for a year. Now scientists think it's creeping closer to an ...

Composite volcanoes are the most common type of volcano. They can have violent eruptions and can grow bigger as layers of thick lava and ash harden on top of each ... that flows down the side ...

The top stones have since fallen off or been removed ... Climbing Khufu is prohibited, so enjoy this rare and beautiful view.

Arenal Volcano ... though the quality of the view depends heavily on the weather. One hiker commented that they could see the smoke coming from the top on their clear day visit.

ANCHORAGE, Alaska (AP) — A volcano near Alaska’s largest city ... The powdered rock can cause a jet engine to shut down. The 1992 eruptions prompted the temporary closures of airports in ...