Tsunami and tidal waves
1 / 11

Tsunami and Tidal Waves - PowerPoint PPT Presentation

  • Updated On :

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)

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
Download Presentation

PowerPoint Slideshow about 'Tsunami and Tidal Waves' - Lucy

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
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 where it starts in about a day and if local, it can reach in minutes

Questions where it starts in about a day and if local, it can reach in minutes

  • 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?