The rupture of the M 9.3 Sumatra earthquake in 2004 began on a NW-SE trending thrust fault off the coast of Sumatra and then propagated in North-South direction along the Nicobar and Andaman islands to a length of 1200 km. Since, a large amount of tsunami energy propagates normal to the trend of the fault direction, the tsunami wave propagated in south-west and westerly direction in the Indian Ocean reaching Indian coast, Srilanka, Maldives and reaching up to eastern African coast lines.