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Weather and Climate

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Definition: A tsunami is a great wave of seawater due to a sudden and large displacment in the water.

What Causes Tsunamis?Tsunamis can be caused by many things. In the past it was large meteorites plunging into the ocean. Now tsunamis are generally cause by underwater volcanos or lanslides.


Tsunami Hot SpotsOne of the most common places for a tsunami is called the ring of fire located in the Pacific. Tectonic plates shifting make earthquakes and volcanos often which can set off a tsunami. Another place where tsunamis strike is the Pacific coast of Japan.


Worst Recorded Tsunamis-December 26th, 2004in Sumatra, Indonesia. Was set off by 9.1 magnitude earth quake and caused 10 billion dollars worth of damage.- March 11th, 2011 in North Pacific Coast, Japan. The tsunami traveled 800 km's an hour and killed over 18,000 people.

How To Prepare!1. If you just experienced an earthquake stay away from the beach. Earthquakes trigger tsunamis!2. If you see stuff that is normally underwater exposed, RUN! 3. Tsunamis can travel up rivers and streams so avoid them like you would the coast.

Why Are Tsunamis Dangerous?Tsunamis are dangerous because they come very suddenly so there is little time to prepare. The reason they come so suddenly is because they travel mainly underwater. The waves to not reach full height until they are very close to shore.

How Are Tsunami's Measured?Tsunamis do not have a specific form of measurment. You can measure the wvelength of waves though and that is one way to identify a tsunami. Tsunamis have very large wavelengths but short amplitudes. That is why they are not always noticed right away. If a tsunami was caused by an earthquake you could look at the magnitude of the earthquake as a different way of measuring.


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