How do earthquakes cause tsunamis?

Answer 1

Tsunamis are most often caused when an earthquake causes the seafloor to rise or fall. Earthquakes happen when two tectonics plates collide into each other at a plate boundary. The denser plate is subducted under the other plate, which leads to a rise or fall of the seafloor. This movement of the seafloor will cause a rapid vertical displacement of water, and waves of a tsunami would form. As the wave approaches the coastline, it would get higher as the seafloor gets shallower, causing a tsunami to become visible and then grow even higher as the water gets more shallow. The shock waves produced by the earthquake would radiate out and cause other waves to form too.

Tsunamis can be generated when the sea floor abruptly deforms and vertically displaces the overlying water. Tectonic plate earthquakes are associated with the earth's crustal deformation; when these earthquakes occur beneath the sea, the water above the deformed area is displaced from its equilibrium position. Waves are formed as the displaced water mass, which acts under the influence of gravity, attempts to regain its equilibrium. When large areas of the sea floor elevate or subside, a tsunami can be created.

Answer2: Tsunami is a Japanese word that means harbor wave. The tsunami infkuence reaches from the surface tight to the ocean floor, even though the watee may be miles deep. The tsunami runs deep because it is generally caused by violent geologic activity om the seafloor. For this reason scientist sometimes tefer to tsunamis as seismic waves. The seafloor may rise, lifting the column of water above it and creating a gentle swell, which may cover 10,000 square miles. Or the ocean floor may sink, briefly creating a hollow on the ocean surface. Gravity causes the affected water to oscillate up and down, a motion that spawns a series of concentric waves, like those formed when a stone hits a pond. This phenomenon shatters the popular myth that tsunamis are just single rogue waves. Instead they usually fan out in what is called a tsunami wave train. Tsunamis may also be triggered by volcanic eruptions or undersea landslides.

Answer 2

Earthquakes that occur in or very near the ocean or other large body of water can cause a sudden vertical change in the position of the sea floor or the bottom of a large lake and that can cause a wave to form deep under water. The wave moves away from the center of the quake and changes in sea floor height and if it moves over shallow water near shore, the wave rises as it moves above the shallow coastal waters and becomes visible as a tsunami. It can become up to 100 feet high or more as it gets to shore.

Note: A tsunami is different than a tidal wave. See the answer to the question below about what causes a tsunami for more information and detail of how earthquakes cause tsunami.

Answer 3

Earthquakes are a result of tectonic plates shifting. this shift releases an incredible amount of energy. When this shift happens under the sea the energy, which travels in waves, creates a large wave of water to form which moves at a high velocity

Answer 4

The shake in the water vibrate and collapes together to become a tsunamis

This is true

Go in the middle of the ocean when a tsunamis comes and it is safe

Look it up at

www.YouTube/videos/tsunamis/.com

Answer 5

Earthquakes that occur under the ocean floor can displace large amounts of water, creating a series of powerful waves known as a tsunami. The sudden movement of the seafloor during an earthquake generates a vertical displacement of the water above it, which then radiates outward as a series of waves with long wavelengths. These waves can travel long distances across the ocean and cause devastating flooding and destruction when they reach coastal areas.

Answer 6

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