2004
Indian Ocean tsunami
Banda Aceh, Indonesia, and thirteen other countries
≈227,000 dead across 14 countries
What happened
A magnitude 9.1 rupture off northern Sumatra on 26 December 2004 sent waves across an ocean with no warning system in it. Aceh was struck within half an hour; Sri Lanka and India had roughly two hours, Somalia seven. The waves arrived everywhere as a surprise.
What worked
Where knowledge was local, it worked. On Simeulue, the oral tradition of smong — the ground shakes, run to the hills — carried a population of about 78,000 through the wave with a handful of deaths. The Moken sea nomads of the Andaman Sea read the receding water the same way. International giving was, in the end, unprecedented.
What failed
The Pacific Tsunami Warning Center saw the earthquake within minutes and had no mandate, no contact list and no channel to warn the Indian Ocean rim. Countries with two hours of lead time used none of it. The relief that followed was assessed as generous, duplicative, supply-driven and largely deaf to the people it served.
What the inquiry concluded
The Tsunami Evaluation Coalition — a joint evaluation by more than forty agencies, published through ALNAP in 2006 — concluded that the international response was well funded but poorly coordinated and that it too often bypassed and weakened local capacity. Its central recommendation was to strengthen national and local systems rather than the international ones. The Indian Ocean Tsunami Warning and Mitigation System was stood up under UNESCO-IOC in 2006.
Sources (3)
- Tsunami Evaluation Coalition, “Synthesis Report: Expanded Summary — Joint evaluation of the international response to the Indian Ocean tsunami” (ALNAP, 2006)
- UNESCO Intergovernmental Oceanographic Commission, Indian Ocean Tsunami Warning and Mitigation System (IOTWMS) programme documents
- US Geological Survey, M 9.1 Sumatra–Andaman Islands earthquake summary