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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.
Etna volcano photos Etna - Europe's largest and most active volcano is a universe in itself. Browse through our collection spanning almost 20 years of eruptions and more.
Top 20 quakes in 2016 Several magnitude 7 quakes occurred in 2016 (but none above M8): Papua New Guinea, NZ, Ecuador, Solomon Islands, Sumatra, Chile, Alaska and others - nearly all major earthquakes were located near active subduction zones. See the top 20 list of largest quakes in 2016 with this map.