how does a tsunami occur?

Answer 1

there are several factors that go into tsunamis.. either an underwater mudslide that disrupts the ocean floor..an underwater earthquake..or a seavolcano eruption.. anythings that drastically changes the ocean floor in a very small amount of time. the change in the floor causes the water on top of it to change,,, normally the floor drops so all that water drops..this causes HUGE ripples... BIG WAVES... taht travel in all directions in a big circle.... and go out from that point.. that wave energy travels through the water... and keeps going..but when it gets closer to land.... the shallowness of the water doesnt let that energy ripple around or disperse..it pushes it all in one place and that pushes the water up..making a tidal wave... but all the water that comes on land in tsunamis...is just sea water that has been pushed outward by a change in the sea floor

Answer 2

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.

Submarine landslides (which are sometimes triggered by large earthquakes) as well as collapses of volcanic edifices may also disturb the overlying water column as sediment and rocks slide downslope and are redistributed across the sea floor. Similarly, a violent submarine volcanic eruption can uplift the water column and form a tsunami.

Tsunami are surface gravity waves that are formed as the displaced water mass moves under the influence of gravity and radiate across the ocean like ripples on a pond.

In the 1950s it was discovered that larger tsunami than previously believed possible could be caused by landslides, explosive volcanic action, and impact events. These phenomena rapidly displace large volumes of water, as energy from falling debris or expansion is transferred to the water into which the debris falls. Tsunami caused by these mechanisms, unlike the ocean-wide tsunami caused by some earthquakes, generally dissipate quickly and rarely affect coastlines distant from the source due to the small area of sea affected. These events can give rise to much larger local shock waves (solitons), such as the landslide at the head of Lituya Bay which produced a water wave estimated at 50 – 150 m and reached 524 m up local mountains. However, an extremely large landslide could generate a “megatsunami” that might have ocean-wide impacts.

Answer 3

When the underground volcano errupted and a shock wave is release via water energy and that is called tsunami.

Answer 4

the faults under the ocean slam together and cause a ripple
and they could get to be big ripples some times the harder the
slam the bigger the wave.

Answer 5

when an submarine volano erupts and cause huge waves, it can damage all coastal communities.