Q14.What are Tsunamis? How and where are they formed? What are their consequences? Explain with examples.

Tsunamis are colossal ocean waves primarily caused by the sudden displacement of a large volume of water, most commonly due to powerful underwater earthquakes.

Formation and Characteristics

These destructive waves are typically generated by submarine earthquakes in subduction zones, but also by volcanic eruptions, landslides, or meteor impacts. In the deep ocean, they possess long wavelengths and low amplitudes, travelling at high speeds. Upon reaching shallow coastal waters, their amplitude dramatically increases, forming towering, destructive waves.

Geographical Distribution

The majority of tsunamis originate in the seismically active Pacific Ring of Fire, a region characterized by intense plate tectonic activity.

Consequences and Examples

Tsunamis inflict immense loss of life, widespread destruction of infrastructure, and severe environmental damage like salinization and habitat destruction. They also cause long-term economic disruption. Notable examples include the devastating 2004 Indian Ocean Tsunami and the 2011 Japan Tsunami.