A tsunami is a long, high sea wave caused by an earthquake or other disturbance.

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What is a tsunami?

​Watch a video to learn more about tsunamis.

​Link: https://www.youtube.com/watch?v=MfsugkikLJI

It was a 9.1 magnitude earthquake that hit the coast of Sumatra and occured at the depth of 30 km. This fault zone that caused the tsunami was roughly 1300 km long.

Sumatra, Indonesia- 26th December 2004

The answer is...

ALL OF THEM!

Tsunamis are caused by violent seafloor movement associated with earthquakes, landslides, lava entering the sea, seamount collapse, or meteorite impact.