By Parker

Tsunamis come last because tsunamis do not start by ingredients like tornados. All it takes is a landslide to start it or it takes earthquakes.
This or this to this

This is a map of where tsunamis usually happen. The red is where the tsunamis are mega tsunamis. Orange is where tsunamis will have a lot damage and kill most of the people. And where its yellow is where it kills not very many people and does a little damage. Where tsunamis are the worst is in Chile and Japan and every where in Australia. Australia is like a death trap where tsunamis occur everywhere

Tsunamis happen when a landslide falls into the water witch causes a big wave and earthquakes can make the sea shake witch also causes tsunamis so it depends how many times earthquakes or landslides occur by the water

What are the most extreme conditions from a tsunami?
1 The first is little damage
2 the second is minor damage and kills a little bit of people
3 is where lots of people missing and a lot of damage
4 is a mega tsunami where you cant
See the ground

They measure it by how large the wave is and how thick it is and there is a scale that measures how big the waves are.
Large Small

EBSCO (site)
FEMA (site)
World Book (book) Tsunamis, by Steven Ward
Tsunamis (book) by Luke Thompson
Wikipedia (site)

 http://landslides.usgs.gov/
 http://earthquake.usgs.gov/
 http://www.tsunami-alarm-system.com/en/faq/faqs.html
 http://news.nationalgeographic.com/news/2011/03/pictures
/110311-tsunami-earthquake-japan-hawaii-science-worldwaves/
 http://news.discovery.com/earth/wide-angle-japantsunami-110311.html

"Tsunami." Earth Sciences for Students. Detroit: Macmillan
Reference USA, 2010.Gale Science In Context. Web. 8 Feb.
2012.