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Transcript of tsunamis
there is about 1 tsunami every 12 to 13 years
How they form
There are two ways that tsunamis may form
First two plates collide and one plate goes under the other sending vibrations that sends massive waves towards shore.
The waves gain speed while they head towards shore.
they can flood cities towns and even islands.
depending on the size of the land the tsunami can either be big or small.
it also can easily drown people and when it has seceded every thing is mostly still underwater.
why they're dangerous
First a Major earthquake happens. then the earthquake triggers massive waves barreling towards the shore
The waves gain speed while they head toward shore
giant tsunami heads toward shore
The tumaco,Ecuador tsunami
December 12, 1979
the Tohoko, japan tsunami
march 11, 2011
3 years to recover
dec. 26 2004
8 years to recover
How tsunamis re measured and recorded
Tsunamis are measured by the hieght of the tidal waves and also measured by their EtA. (Estimated time of arrival)
They also get measured by the magnitude of the earthquake that triggers the tsunami
How to Prepare for a tsunami
If you should ever see a tsunami run to high ground or inland
Here is a tsunami siren
you will need a tsunami first aid kit. it should include :
1 gallon of water per person per day
food that can not spoil or be damaged by water
non electric can opener
water and food for pets
This term is important because it is one of the key factors of a tsunami
ETA stands for estimated time of arrival
This term is important because it is another key factor that causes a tsunami
Tectonic Plates are plates of Earth's crust that float on the lithospere of the mantle
A Colossal wave is a huge wave
(Colossal means gigantic)
Tsunamis can travel at speeds of about 500 miles or 805 kilometers an hour, almost as fast as a jet plane
The states in the U.S. at greatest risk for tsunamis are Hawaii, Alaska, Washington, Oregon, and California
A tsunami is not just one big wave, but a series of waves called a “wave train.” The time period between waves is called the “wave period” and can be between a few minutes and two hours. The first wave is usually not the strongest, and later waves, such as the fifth or sixth, may be significantly larger.
DoSomething. N.p., n.d. Web. 12 Mar. 2014. <http://www.DoSomething.org>
National Geographic. N.p., n.d. Web. 22 Feb. 2014.<http://.nationalgeographic.com>.
Kusky, Timoth, PHD. Tsunamis Giant Waves From the Sea. N.p.: n.p., n.d. Print.
Spilsbury, Louise, and Richard Spilsbury. Tsunamis. N.p.: n.p., n.d. Print
250 people died
It took 33 years to repair
THAnKS FOR WATCHING
Subduction is when two tectonic plates collide and rub against each other until one plate slips under the other which causes huge waves to travel towards shore at hundreds of miles of hours