Private tours on Etna volcano Discover Europe's largest active volcano on private, guided 1-day tours. Tours can be customized for different interests and fitness levels.
Ibu volcano photos Ibu in Halmahera is one of the most active, but rarely visited volcanoes in Indonesia. A spectacular lava dome is growing inside the volcano's breached crater, with frequent explosions.
Introduction to Plate Tectonics The Earth's upper, rigid layer is broken into several plates which are in constant motion to one another. Most earthquakes and volcanoes occur as result of these plate boundaries.
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