GEOLOGY

Detailed explanation-1: -Although relatively infrequent, violent volcanic eruptions represent also impulsive disturbances, which can displace a great volume of water and generate extremely destructive tsunami waves in the immediate source area.

Detailed explanation-2: -Tsunamis are giant waves caused by earthquakes or volcanic eruptions under the sea. Out in the depths of the ocean, tsunami waves do not dramatically increase in height. But as the waves travel inland, they build up to higher and higher heights as the depth of the ocean decreases.

Detailed explanation-3: -However, tsunamis can also be caused by landslides, volcanic activity, certain types of weather, and-possibly-near-earth objects (e.g., asteroids, comets) colliding with or exploding above the ocean.

Detailed explanation-4: -The most common tsunami trigger is submarine earthquakes, but they can also be set off by a volcanic eruption under, or next to, the sea. Thus volcanoes, earthquakes and tsunamis are part of the same story.

Detailed explanation-5: -A volcanic tsunami, also called a volcanogenic tsunami, is a tsunami produced by volcanic phenomena. About 20–25% of all fatalities at volcanoes during the past 250 years have been caused by volcanic tsunamis. The most devastating volcanic tsunami in recorded history was that produced by the 1883 eruption of Krakatoa.