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Christopher McCrea

on 2 May 2014

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Transcript of tsunamis

In 2004, the Indian Ocean tsunami was caused by an earthquake that is thought to have had the energy of 23,000 atomic bombs. Within hours of the earthquake in 2004, killer waves radiating from the epicenter slammed into the coastline of 11 countries, damaging countries from east Africa to Thailand. By the end of the day, the tsunami had already killed 150,000 people. The final death toll was 283,000.
there is about 1 tsunami every 12 to 13 years
Watery Terror
How they form
There are two ways that tsunamis may form
Step 1:
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.

Step 2:
Step 1:
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
Step 2:
The waves gain speed while they head toward shore
giant tsunami heads toward shore
famous Tsunamis
The tumaco,Ecuador tsunami
December 12, 1979
the Tohoko, japan tsunami
march 11, 2011
15,884 dead
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
sleeping bags
fire extingusher
water and food for pets
Key terms

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
Tectonic Plates are plates of Earth's crust that float on the lithospere of the mantle
Colossal waves
A Colossal wave is a huge wave

(Colossal means gigantic)
Interesting facts
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
800 injured
It took 33 years to repair
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
Full transcript