South Asia is commemorating the tenth anniversary of the tsunami which claimed the lives of nearly quarter of a million people.
One third of the victims of the St Stephen's Day disaster were children, while four Irish people also died in the deluge.
The tidal wave was caused by an earthquake under the sea bed which measured nine on the richter scale.
Around 226,000 people were killed across 13 nations, making it one of the worst disasters in human history.
Ireland is being represented at a number of commemoration events.
Ambassador to Thailand, Brendan Rogers, attended a memorial event organised by the Thai Government in Khao Lak, (north of Phuket Island).
Ambassador to Indonesia, Kyle O'Sullivan, also attended a ceremony in Banda Aceh.
Minister for Foreign Affairs and Trade, Charlie Flanagan said: "Today our thoughts are, in particular, with the families of the four Irish victims: Lucy Coyle, Éilís Finnegan, Conor Keightley, and Michael Murphy."
Our thoughts are with families of victims & survivors of the devastating Asian tsunami which struck a decade ago. pic.twitter.com/e7BJssVlsV
— Charlie Flanagan (@CharlieFlanagan) December 26, 2014Irish people and the Government responded swiftly and generously. Ireland alone contributed in excess of €100m.
€20m was donated by official Government funding and more than €80 million was raised by the Irish public.
In India, hundreds of survivors of the tsunami marched through the southern Indian town of Vailankanni to mark the tenth anniversary of a disaster that has left an indelible mark in their lives.
India, one of the worst-hit countries, lost an estimated 16,279 people and another 730,000 were believed to have been displaced in the disaster.
In Indonesia, a ceremony was led by Indonesian Vice President Yusuf Kalla.
The official memorial service was held in Banda Aceh, the capital of the worst hit area in Aceh province, where at least 168,000 people were killed.
