2004 Indian Ocean earthquake and tsunami
The epicenter of the earthquake was off the west coast of Sumatra, Indonesia. At first, the earthquake was measured as a 9.0 on the Richter scale. It was the longest ever recorded ocean earthquake. It lasted between 500 (8.3 minutes) and 600 (10 minutes) seconds. It was so powerful that it caused the entire Earth to vibrate. It started other earthquakes as far away as Iceland.