Process of Tsunami

(mimin) Most tsunamis occur when there are underwater seismic events such as an underwater earthquake or volcanic eruption.
A tsunami can be generated when convergent or destructive plate boundaries abruptly move and vertically displace the overlying water.
There is usually a movement underwater, like an earthquake, where the earth's plates push together, or a landslide, which causes a wave to be generated.

(alvi) When tectonic plates slide on each other, that's when an earthquake may happen.
Because they can slide under the ocean, the impact can make the water form a giant wave.
This wave is massive - nothing like what a surfer seeks.
The wave can be meters high, and as it rushes closer to the coast it gains enough momentum to wreak massive damage on land.
The momentum slows upon reaching land, but it is still a major force.

Tsunamis can be caused from different kinds of events, including, but not limited to: (mimin)

• Sea bed earthquake, displacing water (the most likely cause).(alvi)
• Distance landslides into the ocean or sea.(mimin)
• Tropical storms or hurricanes.(alvi)
• Volcanic disruption.(mimin)
• Meteor striking the ocean or sea.(alvi)  
   

Source:  Tugas Alvi dan Mimin