Commercial pilots flying in the area Tuesday reported clouds of fine volcanic ash rising into the air above the collapsed ...

Ash from the catastrophic 1980 eruption of Mount St. Helens began to swirl around the volcano this week, creating a smoky haze that obscured its summit.

Learn more about the volcanic island of Nishinoshima and how its frequent eruptions are helping scientists understand how ...

The Alsek Glacier in southeastern Alaska once encircled a small rocky mound known as Prow Knob. But in recent decades, the retreat of the glacier has left Prow Knob as a freestanding island.

How is understanding the factors behind heavy rains in the Himalayas relevant to the UPSC exam? What significance do topics ...