Live science: first results of ocean drilling 362 expedition

When earthquakes happen in the ocean, they can displace huge volumes of water and cause tsunamis. This was the case in 2004 when a magnitude >9 earthquake struck North Sumatra and the Andaman-Nicobar Islands leading to a huge tsunami with coastal waves reaching 15 meters or more. Although earthquakes are expected in subduction zones, the 2004 earthquake ruptured to much shallower depths and closer to trench than most other subduction earthquakes and ended beneath the…