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A relative of tsunami victim from Australia, left, who did not want to give her name is overcome by emotions while being comforted by a friend during a ceremony marking the ten year anniversary of the Boxing Day Tsunami disaster at the Mai Khao Tsunami Memorial Wall on Phuket island, southern Thailand. Image Credit: EPA

Khao Lak, Thailand: Tearful memorials were held across tsunami-hit nations on Friday for the 220,000 people who died ten years ago when giant waves decimated coastal areas along the Indian Ocean in one of the world’s worst natural disasters on record.

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 5,300 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.

As dusk loomed, hundreds gathered for a candlelit memorial on Khao Lak, much of which was washed away by the towering waves.

Among them was 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, explaining she called for help only to realise the people nearby were in fact corpses.

“I managed to hold onto a tree branch,” she said, adding that as the waves retreated she was six metres off the ground.

Nearby, 40-year-old Thai Somjai Somboon, said she still grieves for the loss of 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 told AFP, also with tears in her eyes, adding “I will always miss my sons.”

The official ceremony, to be led by the Thai premier, was due to be held at police patrol boat 813, which was swept around two kilometres inland and has since stood as a memorial to the calamity.

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

Disaster-stricken nations initially struggled to mobilise a relief effort, leaving bloated bodies to pile up under the tropical sun or in makeshift morgues.

The world poured money and expertise into the relief and reconstruction, with more than $13.5 billion collected in the months after the disaster.

Almost $7 billion in aid went into rebuilding more than 140,000 houses across Indonesia’s Aceh province, where most of the nation’s 170,000 victims were claimed.

The main city, Banda Aceh, held the nation’s official remembrance earlier Friday at a 20-acre park.

It was near the epicentre of the massive undersea quake and bore the brunt of waves towering up to 35-metres high.

“Thousands of corpses were sprawled in this field,” Indonesian Vice-President Jusuf Kalla told the crowd — many among them weeping.

“Tears that fell at that time ... there were feelings of confusion, shock, sorrow, fear and suffering. We prayed.

“And then we rose and received help in an extraordinary way. Help came from Indonesia and everyone else, our spirits were revived,” he said, hailing the outpouring of aid from local and foreign donors.

The disaster also ended a decades-long separatist conflict in Aceh, with a peace deal between rebels and Jakarta struck less than a year later.

Mosques also held prayers across the province while people visited mass graves — the resting place of many of Indonesia’s tsunami dead.

But a Red Cross display of hundreds of salvaged ID documents and bank cards, also served as grim reminder that many victims simply vanished.

In Sri Lanka, where 31,000 people perished, survivors and relatives of the around 1,000 who died when waves derailed a passenger train, boarded the restored Ocean Queen Express and headed to Peraliya — the exact spot where it was ripped from the tracks, around 90 kilometres south of Colombo.

The head train guard told AFP a lack of knowledge of tsunamis led to needless deaths.

“We had about 15 minutes to move the passengers to safety. I could have done it. We had the time, but not the knowledge,” 58-year-old Wanigaratne Karunatilleke said.

A pan-ocean tsunami warning system was established in 2011, made up of a network of sea gauges, buoys and seismic monitors, while individual countries have invested heavily in disaster preparedness.

But experts have cautioned against the perils of “disaster amnesia” creeping into communities vulnerable to natural disasters.