• Gravitational pull of the moon

  • Low pressure trough in the ocean

  • Deformation of sea floor and vertical displacement of water

  • Sudden change in the monsoon wind


Seismologists say only earthquakes measuring greater than 7.0 on the Richter scale can produce a major tsunami. The friction between two slow-moving plates of the Earths crust creates vast amounts of seismic energy which is released in the form of an earthquake.

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