Once, the power of volcanoes was thought to be the work of the gods. Now scientists better understand the subterranean forces that cause these steaming mountains to spew fire and molten rock. Follow the pace and rhythm of geologic movement and time, and see how scientists track this motion to predict the next time a volcano will blow.
The video discusses the nature and causes of earthquakes and volcanoes. Other terminology used includes: molten rock, magma, lava, cinder cone, shield volcano, composite volcano and caldera.