What causes a tsunami? A tsunami is a large ocean wave that is caused by sudden motion on the ocean floor. This sudden motion could be an earthquake , a powerful volcanic eruption , or an underwater landslide. The impact of a large meteorite could also cause a tsunami.
What is a Tsunami?
What is a Tsunami and What Causes a Tsunami? | Earth Eclipse
On December 26, morning walkers and fishermen residing along the eastern coast of India observed a strange phenomenon of the sea receding few hundred metres inside exposing parts of the coastal shelf. What they were observing was a precursor to the incoming gigantic tsunami waves generated due to a M 9. This earthquake occurred along a thrust fault in the subduction zone where the Indian tectonic plate is going below the overriding Burmese plate. As a result, the ocean floor broke and there was a vertical displacement of about 15 to 20 meters along the fault causing large scale displacement of water and thus, generating tsunami waves. This kind of large vertical displacement happened because the magnitude of the earthquake was greater than 9 and it occurred at a shallow depth of less than 30km below the ocean.
What caused the massive 2004 Indian Ocean tsunami
It was an undersea megathrust earthquake that registered a magnitude of 9. The earthquake was caused by a rupture along the fault between the Burma Plate and the Indian Plate. Communities along the surrounding coasts of the Indian Ocean were seriously affected, and the tsunamis killed an estimated , people in 14 countries.
Indian Ocean tsunami of , tsunami that hit the coasts of several countries of South and Southeast Asia in December The tsunami and its aftermath were responsible for immense destruction and loss on the rim of the Indian Ocean. On December 26, , at am local time, an undersea earthquake with a magnitude of 9. Over the next seven hours, a tsunami —a series of immense ocean waves—triggered by the quake reached out across the Indian Ocean , devastating coastal areas as far away as East Africa.