Effect of the 2004 Indian Ocean earthquake on Thailand

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Thailand was one of the 14 countries affected by the 2004 Indian Ocean earthquake and tsunami on 26 December 2004. It left behind unprecedented damage and destruction in six provinces of Thailand, impacting 407 villages, completely destroying 47 of them, including prominent tourist resorts like Khao Lak. The disaster killed about 5,400 people in Thailand, including foreign tourists.^[1]

The first location where the tsunami was noticed was on the Similan Islands, a famous diving site located about 70 km from Phang Nga town in Pha Nga province or 13 km from central Khao Lak. The sea around these islands when the tsunami struck was reported to have strong currents and divers underwater felt strong turbulence. Some flooding also occurred inland, though no casualties were reported.

The popular tourist area of Phuket was badly hit, with a large number of people reported dead. The tsunami struck the west coast of Phuket island, flooding the island and causing damage to almost all the major beaches such as Patong, Karon, Kamala, and Kata beach. The resort area of Khao Lak some 80 km north of Phuket was hit far worse with 3,950 confirmed deaths. However, the death toll in Khao Lak may have exceeded 4,500. The severity of the situation in Khao Lak is probably explained by the fact, that unlike the high-rise hotels of Phuket, the village of Khao Lak only had low built bungalows instead of high-rise concrete hotels.

Khao Lak also has an extensive area of flatland only a few meters above the sea level, on which most bungalows were situated. Khao Lak experienced the highest run-up of any tsunami wave height of any location outside Sumatra. Due to the topography of the seabed, coastline and reefs offshore, the tsunami waves piled on top of themselves and in doing so, create the infamous 'disappearing sea effect' which enticed many tourists to their deaths. This effect is also known as the tsunami drawback. Bhumi Jensen, grandson of Thailand's King Bhumibol Adulyadej was among those killed in Khao Lak.

Just north of the Khao Lak area, the village of Ban Nam Khem was the worst affected in terms of devastation to the local population, with around a quarter of its population of 4,200 lost to the tsunami and 80 percent of homes destroyed.^[2]

Source: Bangkok Post. The "total deaths" and "total injured" categories include dead and injured persons whose nationality is not given or has not been established. The number of "foreign injured" has been reduced by evacuations of foreign nationals. Thai sources acknowledge that the great majority of those listed as "missing" are in fact dead, and that a large majority of these are foreigners.

An article in the Bangkok Post on 10 January suggested that some of the figures in this table may be seriously misleading. According to this article, the estimated number of deaths among Thai nationals has been reduced from about 2,500 to about 1,800, and the estimated number of deaths among foreigners has been reduced from 2,500 to 1,300. The number of deaths whose nationality has not been established has risen correspondingly, from less than 200 to about 2,100. This is due to increasing doubts about the reliability of the classification on the basis of visual identification of badly decomposed bodies into "Thai" and "foreign" categories. All bodies of unknown origin will now be DNA tested to determine their ethnic origin.