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| 1. |
Write any two causesresponsible for thé occurrence of tsunami? |
| Answer» A tsunami is a large ocean wave usually caused by an underwater earthquake or a volcanic explosion. Tsunamis are not tidal waves. but with a tsunami, water flows straight.Tsunamis are caused by underwater landslides, volcanic eruption, earthquakes, or on very rare occasions large meteorite strikes that then generate sudden movements on the ocean floor. However, in most cases, tsunamis are caused by powerful underwater earthquakes.\tLandslides :The slides of large masses of dirt and rocks under water can cause a tsunami. Landslides can also contribute to sinking or slumps of heavy land masses into the ocean thereby causing a sudden movement of the ocean water. This phenomenon is merely because landslides displace the water masses and cause underground disturbances that, in turn, pushes the water outwards towards the shores.\tLarge Meteorite Strikes or Nuclear Explosions: Seismic waves (wave shocks), underwater disturbances and ocean water displacement that lead to tsunamis can be generated by nuclear explosions or large meteorite strikes. Nonetheless, tsunami events associated with large meteor strikes or nuclear explosions are very rare. | |