A tsunami is a series of sea waves set off by a sudden movement of the sea floor — usually an earthquake under the sea, sometimes an eruption — which can cross whole oceans and flood the coasts.
উদাহরণ
Example 20.11 (From Sumatra to Sri Lanka)
Colombo, the largest city of Sri Lanka, is about from the epicentre of the 2004 earthquake. At , a tsunami covers this distance in hours, that is about 2 hours and 17 minutes. Nobody in Sri Lanka felt the earthquake: the wave came without any warning but the sea itself.