File: hawaii_e7328.jpg | Hits
More on VolcanoDiscovery:
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.
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.