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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.
Colima volcano photos This beautiful stratovolcano in western Mexico is one of the most active volcanoes on the American continents. It is known for its often spectacular explosions and sometimes glowing avalanches.
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.
Worst earthquakes of the 20th century More than 1.5 million people lost their lives because of earthquakes in the 20th century. Check the list of damaging and deadly quakes from 1900-1999!