Tsunami can be caused due to

Answer
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Hint: A tsunami is a sequence of extraordinarily long waves created by a huge and sudden shift in the ocean floor, which is usually caused by an earthquake beneath or near the ocean floor. This force generates waves that travel in all directions away from their source, spanning entire ocean basins in the process.

Complete answer:
Earthquakes on convergent tectonic plate borders create the majority of tsunamis. Since 1900, earthquakes have caused almost 80% of potential tsunamis, according to the Global Historical Tsunami Database. Landslides, volcanic activity, certain types of weather, and—possibly—near-earth objects (e.g., asteroids, comets) colliding with or exploding above the water can all generate tsunamis.

The speed of a tsunami is determined by the depth of the water. A tsunami in the deep ocean can travel at speeds of over 500 mph, and its wavelength, or distance between crests, can reach hundreds of miles. A tsunami will usually go unnoticed by mariners as it passes beneath them; in deep water, the top of the wave rarely rises above three feet above the ocean swell.

When a tsunami reaches land, it becomes dangerous. When a tsunami hits shallow water along the coast, it slows to 20 to 30 miles per hour. The wavelength gets shorter, the height gets higher, and the currents get stronger.

Note: Scientists have no way of knowing when or where the next tsunami will hit. Tsunami warning centres, on the other hand, are aware of which earthquakes are likely to result in tsunamis and may send out alerts when one is imminent.