This story appears in the April 2011 issue of National Geographic magazine. When? This is the question that has brought two of the world's leading volcano scientists to the center of Africa ...

Four types of volcanoes—shield, composite, cinder cone, and plug dome—can be found in Lassen Volcanic National Park, where they literally bubble and steam.

Hawaii’s Kīlauea volcano, located in Hawaii Volcanoes National Park, began erupting. Lava fountains emitted from the volcano, ...