In 2004, a magnitude 9.3 earthquake struck Sumatra 86 nautical miles west of the eastern Indian Ocean, triggering a tsunami in South Asia.

Ten countries around the Indian Ocean have been hit hard and are included in the list of hard-hit areas. At least 290,000 people were killed and missing in the tsunami.

Unofficial figures suggest that the death toll is likely to exceed 400,000, as many of the small islands in the Indian Ocean have no population counts.

At that time, many small islands in the eastern Indian Ocean were wiped out by the tsunami, and some even disappeared from the face of the earth.

Geological studies have pointed out that the Indian Ocean earthquake has cut 1,600 kilometers of cracks in the oceanic plate from Sumatra to the north.

This has led to extreme instability in the Indian Ocean. Scientists predict that there is still a chance of major earthquakes and large tsunamis in the southern Indian Ocean.

An islander on a small island in the eastern Indian Ocean at the time of the South Asian tsunami. During the tsunami rush, climb into a large iron pot.

Later, the islanders, who were swept into the sea by the tsunami, drifted with the waves in large iron pots, picking up coconuts at sea to quench their hunger and thirst.

A week later, the islander drifted from the Indian Ocean into the Strait of Malacca. Finally, he landed in Malaysia and was rescued.

At that time, the news media competed to cover and report on the rafting process, and this incident also became a real version of Robinson Crusoe.

The South Asian tsunami became a major event in history, and countries began to make amends after the fact. Coastal countries have set up warning systems along their coasts, placing buoy sensors and monitoring stations along the coast and in adjacent waters.

Unfortunately, countries are only setting up tsunami detection systems along their own coasts and adjacent waters. There is still no tsunami detection system in place in the Indian Ocean that can monitor the entire area.

Tsunamis reach speeds of up to 600 kilometers per hour in the deep sea, faster than airplanes. Speeds of more than 100 kilometers per hour are also reached in shallow seas.

At tsunami speeds, existing coastal surveillance systems do not provide sufficient evacuation time.

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