Tsunamis

Front

What are the two Japanese words that form the word 'tsunami'?

Back

Tsu (harbor) and nami (wave)

Front

Why is it difficult to detect a tsunami while on a boat in the open ocean?

Back

Gravity flattens out the enormous waves caused by undersea earthquakes.

Front

Are tsunamis related to the ocean's tides?

Back

No, tsunamis are not related to tides; they are caused by undersea earthquakes.

Front

How far can a tsunami travel?

Back

Over 1000 miles.

Front

What is the first event in the sequence of a tsunami occurring?

Back

Pressure begins building in a subductive zone.

Front

What causes a tsunami?

Back

Undersea earthquakes, volcanic eruptions, or landslides.

Front

What is the difference between a tsunami and a regular ocean wave?

Back

Tsunamis have long wavelengths and can travel across entire ocean basins, while regular waves are shorter and dissipate quickly.

Front

What is the average speed of a tsunami in the open ocean?

Back

About 500 to 800 kilometers per hour (310 to 500 miles per hour).

Front

What happens to a tsunami as it approaches the shore?

Back

It slows down and increases in height, potentially causing significant damage.

Front

What is a subductive zone?

Back

An area where one tectonic plate is being forced under another, often leading to earthquakes.