Originally filmed with IMAX format cameras, "Ring of Fire" takes you heart-stoppingly close to the great circle of volcanoes and seismic activity that rings the Pacific Ocean. It is the story of these immense volcanic forces and the half-billion people that coexist with them every day around the fiery boundary of the Pacific Rim. You'll feel the heat as cameras take you to the birth of a new volcano in Chile, and relive history with rare and spectacular images of the infamous 1980 eruption of Mount St. Helens. You will march with the inhabitants of Sakurajima, Japan, as they participate in their annual evacuation drill, and witness one of the frequent ash eruptions of this very active volcano. A whirlwind computer animation sequence gives you a ride through the center of the earth to see the process of the geological forces that cause a volcanic eruption or earthquake. The devastating results of these forces are witnessed through the scenes of the 1989 earthquake that rocked the city of San Francisco.