Tsunami and tidal waves
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Tsunami and Tidal Waves. By Matt Sapp & Lauren Gareau . Wading in Water. Tsunami, commonly known as Tidal Waves come from the Japanese word Tsu for (harbor) Nami for (Wave)

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Tsunami and Tidal Waves

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Tsunami and tidal waves

Tsunami and Tidal Waves

By Matt Sapp

&

Lauren Gareau


Wading in water

Wading in Water

  • Tsunami, commonly known as Tidal Waves come from the Japanese word Tsu for (harbor) Nami for (Wave)

  • All oceans can have tsunami’s but 80% of Tsunami’s originate in the Pacific Ocean due to large amounts of geological activity

  • From Japan to the West Coast of South America, tsunami’s strike with devastating consequences


All washed up

All Washed Up

  • A tsunami is a series of waves in a body of water that vertically displaces the water column

  • Oceanographers often refer to tsunami’s as seismic sea waves as a result of a rise or fall of the earths crust

  • The displacement can be caused by earthquakes, landslides, volcanic eruptions, and meteorites

  • All but meteorites occur under the sea

  • Tsunami’s are most likely to occur in April


Turning the tide

Turning the Tide

  • Tsunami’s can go undetected until it reaches shallow waters

  • Some vary from 30ft to 100ft

  • Tsunami’s move a the speeds approaching jet aircraft

  • Tsunami’s are able to be detected but the size and destructive force of them can not be predicted

  • The ability to detect them gives the population a chance to get cover


A wave is a wave

A Wave is a Wave?

  • The difference between a tsunami and wave is that waves you see at the beach are generated by wind

  • Waves depend on the strength of the wind and the wavelengths (distance between crest/trough) is from 5ft to 1000ft

  • Waves moves at about 5 to 60 mph


A wave is a wave cont

A Wave is A Wave Cont

  • Tsunami’s result from physical mechanisms

  • The magnitude of a tsunami is by the mechanism

  • The difference between wavelengths can range from 100-300 miles apart

  • Depending on depth tsunami’s can travel up to 500 mph


That s no tsunami

That’s No Tsunami

  • Common misconceptions come regarding tsunami’s appearance but it all depends on the topography of the ocean floor

  • The increase in height occurs as the tsunami gets closer to land

  • Most think tsunami’s are large steep waves this is not always the case

  • Most tsunami’s appear as an advancing tide

  • The result is the rapid flooding of the low-lying coastal areas


That s a big momma

That’s a big Momma

  • The largest tsunami occurred in Lituya Bay on the southern coast of Alaska

  • On July 9, 1958 a earthquake caused a glacier landslide at the head of the bay

  • It triggered a wave that was 1720ft/524m high

  • This is the equivalent of over 5 football fields

  • This is the case of a tsunami where no people were present but this possible

  • Up to 36,000 people have died in a tsunami and the following flooding that occurs (Krakatoa, Indonesia 1883)


Danger watch yourself

A tsunami can reach the shore of any country regardless of where it starts in about a day and if local, it can reach in minutes

A tsunami is more than just a single wave like an earthquakes aftershocks, tsunamis are a wave train and many people have lost their lives returning home thinking it was safe

Danger Watch Yourself


Crazy pics

Crazy Pics


Questions

Questions

  • 1. What is a Tsunami?

  • 2. What is the ranging height for Tsunamis?

  • 3. What is the difference between a Tsunami and a wave?

  • 4. Where and when did the largest Tsunami occur?

  • 5. How long does it take for a Tsunami to occur?


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