How fast do tsunami waves travel across the open ocean?
about 20 km/h
about 100 km/h
up to 300 km/h
up to 800 km/h
Where the ocean is over 6,000 meters (3.7 miles) deep, unnoticed tsunami waves can travel at the speed of a commercial jet plane, over 800 km per hour (500 miles per hour). Tsunamis travel much slower in shallower coastal waters where their wave heights begin to increase dramatically.
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Answers by country
about 20 km/h
about 100 km/h
up to 300 km/h
up to 800 km/h
answers
Italy
13
the Netherlands
12
Australia
28
Greece
19
Republic of Ireland
12
Germany
35
Canada
11
Poland
1515
the United States
66
the United Kingdom
70
India
34