We'll get the latest on the eruption of Alaska's Mount Redoubt volcano.

Some volcanoes experience a large number of pre-eruption earthquakes.

This lesson introduces and explores the Pacific Ring of Fire. It is 2 of 3 in the series titled "Geology: Pacific Ring of Fire."

A video clip briefly describing how volcanoes work. [1:42]

In this video, Paul Andersen explains how natural disasters (like earthquakes, tsunamis, volcanoes and flooding) have affected and will continue to affect humans on the planet. Many of the natural hazards (like volcanoes and storms) can...