Tohoku Japan Earthquake
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Transcript of Tohoku Japan Earthquake
Tohoku Japan Earthquake
By: Millie, Casey, McKinzie, Abbey
In the 65 years after the end of World War II, this is the toughest and the most difficult crisis for
Japan.”-Japanese Prime Minister Naoto
Kan
http://www.bbc.co.uk/news/world-asia-pacific-
12709598
http://en.wikipedia.org/wiki/2011_T%C5%8Dhoku_earthquake_and_tsunami
Major Causes of Damage
In the end:Deaths: 15,878Injured: 6,126Homeless: at least 450,000Missing: 2,713
http://en.wikipedia.org/wiki/2011_Tōhoku_earthquake_and_tsunami
Reverse faults are the primary cause of the largest tsunamis. Reverse faults are where two plates
collide and one plate is lifted over the other plate. While these plates are generally in constant
motion it is at the junction of their boundaries where the plates are locked together and the
stress between them begins to build.
http://www.srh.noaa.gov/jetstream/tsunami/generation.htm
As the two plates remain locked together stress continues to build at
their intersection. As a result, the sea floor is pulled down (2) with a
corresponding rise on the continental side of the fault.
http://www.srh.noaa.gov/jetstream/tsunami/generation.htm
At some point, the stress between the two plates becomes too much and the
earth between the two plates move releasing the pressure. This is felt as an
earthquake.
It is this sinking water, moving ahead of the bulge of lifted water, that is responsible for the often observed 'pulling away' of water
from the normal shoreline as the tsunami approaches.
http://www.srh.noaa.gov/jetstream/tsunami/generation.htm
The tsunami radiate out from source of the
earthquake.
As the tsunami moves into more shallow water the speed of the
tsunami diminishes and height of the waves grow
http://www.srh.noaa.gov/jetstream/tsunami/generation.htm
Japan is one of the most well-prepared countries in the world to deal with the
threat of a tsunami.Warning systems are in place, and
concrete sea walls wrap around much of the coastline.
-Japan was just not ready for an event of this size
- They hadn't had something this large for
over a 100 years - Seawalls were not high
enough and gave false hope.
ImprovementA major thing that Japan needed to
improve was having their citizens more
educated. People got their hopes up that the seawalls would protect
them. http://www.gatech.edu/newsroom/release.html?nid=114571
Nuclear Power Plant that was effected by the earthquake and tsunami The Plant has 6 boiling water reactors
Fukushima Daiichi
Fukushima Daiichi
Units 1, 2, and 3 were in operation at the time of the earthquake and were automatically shut down
The tsunami waves hit and submerged and damaged the heat exchangers for dumping reactor waste heat and decay heat to the sea.
Fukushima Daiichi
The three units lost the ability to maintain proper reactor cooling and water circulation functions
As a result of no power there was no venting system and Units 1 and 3 had a hydrogen explosion where the hydrogen mixed with air and ignited.
Radioactive Contamination
Iodine-131
caesium-137
Evacuations were ordered for a 20 km radius
How could it have been prevented?TEPCO didn’t want to draw attention by adding preventative measures
Engineering techniques
The tuned mass dampener is an object (the gold ball) built into a building’s interior to absorb seismic shock.
http://www.businessinsider.com/earthquake-resistant-buildings-2011-3?op=1
Tuned Mass Damper
http://civilandstructuralanalysis.blogspot.com/
Springs-with-damper base isolator absorbs the seismic energy of the earthquake and reduce structural damage
http://www.businessinsider.com/earthquake-resistant-buildings-2011-3?op=1
Friction pendulum system is a design where energy is absorbed by the legs and dissipated through cylinders and sliders.
http://www.businessinsider.com/earthquake-resistant-buildings-2011-3?op=1
The E-Defense table is a shifting base intended to simulate an earthquake.
http://www.businessinsider.com/earthquake-resistant-buildings-2011-3?op=1
Japan’s EconomyClosed down or damaged ports and airport
Disrupted Global Supply Chain
Increase in food prices
Suspended car production
Employment rates
Government debt increase
http://useconomy.about.com/od/criticalssues/a/Japan-Earthquake.htm
http://www.alsosprachanalyst.com/economy/the-impact-of-japans-earthquake-on-the-economy-my-first-thoughts.html
Global EconomyStocks in market declined
Radiation impact
Flow of goods are disrupted around the world
Construction companies benefitExposure to radiation
http://www.institutionalinvestor.com/article.aspx?articleID=2787087
http://www.alsosprachanalyst.com/economy/the-impact-of-japans-earthquake-on-the-economy-my-first-thoughts.html
OverallThere was a large impact on japans
economy and a very little impact on the rest of the world.