This earthquake occurred along a thrust fault in the subduction zone where the Indian tectonic plate is going below the overriding Burmese plate. Tsunami waves are also known to have been generated by earthquakes of greater than magnitudes but with lesser intensities.
The Indian Ocean earthquake and tsunami occurred at UTC on 26 December, . The Indian Ocean earthquake is thought to have triggered activity in both Leuser Mountain and Mount Talang, volcanoes in Aceh province.
The December 26, Indian Ocean tsunami was caused by an earthquake that is thought to have had the energy of 23, Hiroshima-type atomic bombs.
So the quake caused violent shaking and extensive damage to even.
The day of Dec. 26, , started with an earthquake, off the coast of Sumatra, and only got worse as the resulting tsunami hit coastal nations.