Tsunami General Info|
Cause of Tsunami
Most of oceanic tsunamis (up to 75% of all historical cases) are generated by shallow-focus earthquakes capable of transferring sufficient energy to the overlying water column. The rest is divided between the landslide (7%), volcanic (5%) and meteorological (2%) tsunamis. Up to 10% of all the reported historical run-ups still have unidentified sources.
Some recent studies (see, for instance, Gusiakov, 2003) show that actually the fraction of tsunamigenic event where slide-generation mechanism was involved can be much higher (up to 30% of all cases).