U.S. Navy via Getty Images
4. Offshore Japan -- A 9.0-magnitude earthquake triggered a tsunami that struck off the coast of northern Japan on March 11, 2011. The widespread damage left more than 15,000 people dead and several thousand more missing. In this handout image provided by U.S. Navy, an aerial view of the tsunami and earthquake damage in Sendai, Japan is seen from an SH-60B helicopter on March 12, 2011.