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.
Blue flames of burning sulfur: Ijen volcano in East Java has one of the most impressive sulfur deposits on earth. They are so hot that the sulfur often ignites - a mysterious display at night caught on camera.
Copyrights:VolcanoDiscovery and other sources as noted. Use of material: Text and images on this webpage are copyrighted. Further reproduction and use without authorization is not consented. If you need licensing rights for photographs, for example for publications and commercial use, please contact us.