Great Tsunami: 26 December 2004, Sumatra Region



The Sumatra-Andaman earthquake and tsunami of 26 December 2004, one of the deadliest natural events in human history, caused more than 223,000 fatalities around the margins of the Indian Ocean.The rupture initiated beneath northwestern Sumatra and propagated 1300 kilometers to the Andaman Islands.

Access to extensive portions of the rupture zone north of Sumatra is restricted by the Indian or Chinese governments. In addition, because of political considerations, India does not provide open access to data from its extensive network of mainland broadband seismometers. These factors provide a context for Memoir 64 of the Geological Society of India, which documents primary observations of the earthquake and tsunami effects in Indian territories.