What conditions need to be present for a tsunami to occur?

Answer 1

The major ones result from sub-sea earthquakes in subduction zones.

Others can be triggered by major undersea mud-slides or volcanic eruptions.

The 19C eruption of Krakatoa (or Krakatau) raised a gigantic wave that raced right round the world, obviously diminishing rapidly with distance but creating terrible havoc in the region. The cause was a gigantic final blast that may have been from the magma chamber collapsing and sea-water suddenly quenching a huge volume of very hot rock and lava. However, I'm not sure if this can be called a tsunami.

Answer 2

A tsunami is typically caused by an underwater earthquake, volcanic eruption, or landslide that displaces a large volume of water. The energy from these events creates powerful waves that can travel long distances across the ocean before reaching the shore and causing widespread destruction. High magnitude events are more likely to generate tsunamis.

Answer 3

One criterion is that it involves the movement of the entire column of water from surface to ocean floor, and not just surface movement.

Answer 4

When an earthquake occurs in the ocean floor make it more likely for a tsunami to occur. Tsunami's move faster in deeper water.

Answer 5

A tsunami has nothing to do with the weather. They are caused by underwater earthquakes, underwater landslides and other underwater earth movements.

Answer 6

Tsunamis are not a weather-related phenomenon. They are usually triggered by underwater earthquakes or landslides, so they can occur in any weather.

Answer 7

volcanic disturbance