KHAO LAK, (AFP) - Tearful mourners lit candles on Friday to remember the 220,000 people who died a decade ago when tsunami waves devastated coastal areas along the Indian Ocean, in one of the worst natural disasters in human history.

On December 26, 2004 a 9.3-magnitude earthquake off Indonesia's western tip generated a series of massive waves that pummelled the coastline of 14 countries as far apart as Indonesia, Thailand, Sri Lanka and Somalia.

Among the victims were thousands of foreign tourists enjoying Christmas on the region's sun-kissed beaches, carrying the tragedy of an unprecedented natural disaster into homes around the globe.

In southern Thailand, where half of the 5,400 dead were holidaymakers, people recounted stories of horror and miraculous survival as the churning waters, laden with the debris of eviscerated bungalows, cars and boats, swept in without warning, obliterating resorts and villages.

A minute's silence in the resort of Khao Lak, much of which was washed away by the towering waves, was broken by a lone trumpeter, as mourners each lit a single white candle, some sobbing as they illuminated the darkness.

Among them was a Swiss national, Katia Paulo, who lost her boyfriend on a nearby beach.

"I had my back to the ocean. My boyfriend called me... the only thing I remember is his face. I knew I had to run away, then the wave caught me," the 45-year-old told AFP.

"I was pushed under water many times and thought it was the end," she said.

She called for help, only to realise the people nearby were already dead.

"I managed to hold onto a tree branch," she said. As the waves retreated, she was six metres (200 feet) off the ground.

Nearby, 40-year-old Somjai Somboon was grieving for her two sons, who were ripped from their house when the waves cut into their fishing village of Ban Nam Khem.

"I remember them every day," she said, with tears in her eyes.

"I will always miss my sons."

Among the international commemorations, in Sweden, which lost 543 citizens to the waves, the royal family and relatives of the victims will attend a memorial service in Uppsala Cathedral on Friday afternoon.