Was the Indonesian tsunami caused by an earthquake?

Among the most deadly earthquakes in history was the magnitude 9.1 quake that struck off the west coast of the Indonesian island of Sumatra on Dec. 26, 2004, triggering a massive tsunami.

How was the Indonesian tsunami caused?

The tsunami swept onto the coastlines of southeastern Sumatra and western Java without warning from either earthquake ground shaking or any alert system. The source of the tsunami was along the southwest coast of Anak Krakatau, an active volcano on the rim of the caldera of the great 1883 Krakatau eruption (1).

Is tsunami is caused by an earthquake?

Although tsunamis occur most often in the Pacific Ocean, they can be generated by major earthquakes in other areas. The most frequent cause of tsunamis…is crustal movement along a fault: a large mass of rock drops or rises and displaces the column of water above it.

What was the biggest tsunami?

Can a 7.1 earthquake cause a tsunami?

No, all earthquakes do not cause tsunamis. There are four conditions necessary for an earthquake to cause a tsunami: (1) The earthquake must occur beneath the ocean or cause material to slide in the ocean. (2) The earthquake must be strong, at least magnitude 6.5.

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How strong does an earthquake have to be to cause a tsunami?

Usually, it takes an earthquake with a Richter magnitude exceeding 7.5 to produce a destructive tsunami. Most tsunamis are generated by shallow, great earthquakes at subductions zones. More than 80% of the world’s tsunamis occur in the Pacific along its Ring of Fire subduction zones.

How long after an earthquake does a tsunami come?

That warning, he says, can go out within three to five minutes of the undersea earthquake and gives an early indication of its potential to cause a tsunami which may do damage. “If the earthquake is big it could be moving quite a lot of sea floor — often along a subduction zone”, he explains.

What is the atomic bomb equivalent to a 8.0 earthquake?

Seismic energy by magnitude compared:

Magnitude Energy in joules (J) TNT equiv.
5.0 2.0 x 1012 500 tons of TNT
6.0 6.3 x 1013 15 kilotons of TNT
7.0 2.0 x 1015 500 kilotons of TNT
8.0 6.3 x 1016 15 million tons of TNT

When was the last tsunami in the world?

Tsunami of January 22, 2017 (Bougainville, P.N.G.)

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