Earthquake December 26, 2004, with its epicenter in the Indian Ocean near the Indonesian island of Sumatra and the ensuing giant tsunami caused the death of more than 155 thousand people. And not only in Indonesia but also in the whole of South-East Asia and even in Africa.
The tsunami in Southeast Asia almost all experts consider one of the worst natural disasters in recorded history. Caused him underwater earthquake measuring 9 on the Richter scale — the most powerful in the last 45 years: his energy was equivalent to 9.5 thousand explosions of atomic bombs dropped on Hiroshima. It was enough that the axis of the world has moved to 3 cm, and the Earth's rotation sped up by 3 microseconds.
Geological reasons for what happened due to the fact that the island of Sumatra in the north-eastern Indonesia is on the boundary of tectonic plates — huge portions of the earth's crust, in constant motion. Plate, on which the Indian Ocean, is moving to the north-east, gradually advancing on Sumatra.
Because it is heavier than the Sumatran, we can say that the Indian Ocean "sinking" under Sumatra. Crack length in the tectonic plate is about 1 thousand km, one of the plates fell almost 10 m tsunami in 2006 proved: the tragedy of this kind does not know borders. According to the World Health Organization, up to 5 million people in the countries in the Indian Ocean, the livelihood.
The waves of the Indian Ocean have been throughout the Pacific, and even touched on the Kurils. True, the power of the wave generated by an earthquake near about. Sumatra, put out numerous straits. Until about. Paramushir, which is the North-Kurilsk, has gotten to a harmless wave height of only 29 cm
Protect themselves, and even more to prevent such disasters impossible. However, it is humanly possible — to predict tsunamis. Russian experts from the Novosibirsk State University say: if there is an underwater earthquake of 8 points, and is sure to be a tsunami. Question — where it comes.
To accurately calculate where you can expect the damage, the researchers modeled the situation on a computer. More or less adequate results can be obtained if the model will be several billion computational cells. Today, the difference in the net accounts is 3-6 km, and it is necessary, it happens — 50 m So in predicting tsunamis, like it or not — it's up to supercomputers and new, faster algorithms.