Why, when and where do tsunamis occur?

Answer 1

A tsunami is a series of waves created when a body of water, such as an ocean, is rapidly displaced on a massive scale. Earthquakes, mass movements above or below water, volcanic eruptions and other underwater explosions, landslides, large meteorite impacts and testing with nuclear weapons at sea all have the potential to generate a tsunami.
Tsunami are common throughout Japanese history; approximately 195 events in Japan have been recorded.
Tsunami can be generated when the sea floor abruptly deforms and vertically displaces the overlying water. Such large vertical movements of the Earth’s crust can occur at plate boundaries. Subduction earthquakes are particularly effective in generating tsunami.

In the 1950s it was discovered that larger tsunami than previously believed possible could be caused by landslides, explosive volcanic action, and impact events.
Tsunami occur most frequently in the Pacific Ocean, but are a global phenomenon; they are possible wherever large bodies of water are found, including inland lakes, where they can be caused by landslides.
Japan is the nation with the most recorded tsunami in the world. The earliest recorded disaster being that of the 684 A.D. Hakuho Earthquake. The number of tsunami in Japan totals 195 over a 1,313 year period, averaging one event every 6.7 years, the highest rate of occurrence in the world.
On December 26, 2004, an undersea earthquake measuring 9.3 on the Earthquake Magnitude scale occurred 160 km (100 mi) off the western coast of Sumatra, Indonesia. It was the second largest earthquake in recorded history and generated massive tsunamis, which caused widespread devastation when they hit land, leaving an estimated 230,000 people dead in countries around the Indian Ocean

Answer 2

How Do Tsunamis Occur

Answer 3

when an earthquake or an underwater land slide occur (the ocean floor has many more mountains then there are on land) this displaces the water and an energy wave spreads out in a circular pattered not much different then a ripple on the surface of a pond, except it's under water. as the energy reaches the shore there is less water to feed the energy so as a result the wave gets bigger and bigger until it slams into land and disperse. certain features in the soil nearing the cost will effect the way the wave forms. This is apperant when you look at japan's 33ft wave today but the same quake cause only a 3-6ft wave in Hawaii.

Answer 4

check the documentarie on discovery channel calle was tsunami man made and the mega tsunami
the normal tsunami is an under sea movement of the earths crust and sends a wave for thousands of miles several metres high
but there is talk that it could be produced by messing with wave lenths
check HAAARP
the Mega stunami is a land fall of a mountain that sets a wave into motion that can cross the ocean
there is one aimed at the east coast of America ,but it could be thousand or hundreds of years before it happens
one happened in New foundland that crossed a bay and reached over 50 meters in hight

Answer 5

Tsunamis occur on the coasts of continents. They occur because there has been an earthquake in the ocean floor somewhere near these coasts.

Answer 6

A tsunamis is a giant wave caused by an earthquake below the sea floor

Answer 7

Matthew ... Check out my link, below. It tells a lot about tsunamis including details regarding many such occurrences.

Answer 8

anywhere near water. Landslides, earthquakes and meteorites can cause tsunamis

Answer 9

when the plates force an upward thrust under the ocean's surface.

because the plates force an upward thrust under the ocean's surface.

where the plates force an upward thrust under the ocean's surface. and ripple out from there (with larger waves than a ripple)