Once more on the 'Cheonan' disaster

On March 26, 2010 at 2122 hours the South Korean ship Cheonan split and sank in the West Sea near Baekryong Island killing 46 crew members. Subsequent investigations by an international team of civilian and military experts from Republic of Korea, the UK, the US, Australia, Sweden and Canada led to the conclusion that a torpedo fired by a North Korean submarine had caused the explosion that sank the ship.

The investigation team in its report said that the above conclusion was based on (1) precise measurement and analysis of the damaged part of the hull, a thorough investigation of the inside and outside of the ship which pointed to a strong shockwave and bubble effect causing the split and sinking of the ship, statements by survivors of the incident and medical examination of the deceased.

As further evidence it cited the seismic and infrasound wave analysis conducted by the Korea Institute of Geoscience and Mineral Resources (KIGAM), numerous simulations of an underwater explosion, analysis of tidal currents in the area where the ship sank and produced collected torpedo parts from the scene of the incident.