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Tropical rainforest, coconut palm beaches, primitive culture and moon-like landscapes, and some of the world's most active and exciting volcanoes. Join us on our expedition to Vanuatu.
Latest VAAC alerts The Volcanic Ash Advisory Centers provide near-real time global monitoring of volcanic ash plumes for aviation. Read the latest (or browse past) advisories.
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.