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Japan Earthquake, Tsunami and
Radiation Event
2011
Sada Sehar
2014-es-017
• Time of earthquake: 14:46 (JST)
• Duration: 6 minutes
• Moment magnitude: 9.0
• Focus: 24 km
• Epicentre: 130 km east of Sendai,
and 373 km northeast of Tokyo.
• Time of Tsunami: 15:35 (JST)
Cause of Earthquake: Sub duction of the Pacific plate under
the Okhotsk Plate
Other names of Japan Earthquake
• Great East Japan Earthquake
• 2011 Tōhoku earthquake
• 3.11 earthquake
• Great Sendai Earthquake
• It was the most powerful earthquake ever
recorded in Japan, and the fourth most
powerful earthquake in the world since
modern record-keeping began in 1900.
Foreshock:
• On March 9, two days prior to the main
earthquake, an M 7.3 earthquake.
Aftershocks:
Between March 11 and June 11, there were
• 5 aftershocks that were M 7.0 or higher,
• 82 aftershocks that were M 6.0 or higher,
• 506 aftershocks that were M 5.0 or higher
The Tohoku region experienced crustal movement of up to 5.3 m in the horizontal direction and
up to 1.2 m in the vertical direction (subsidence) within a short period
Effects of Earthquake and Tsunami
According to an announcement by the
National Police Agency (NPA) on
September11, 2011
• 15,782 people had died
• 4086 people were still missing
• More than 60% of the dead and
missing persons were aged 60
years or older
• Many fire-fighters and police
were also among the victims
Effects of Earthquake and Tsunami
• The number of the 2011 Great East Earthquake and
Tsunami related fires is 286. (FDMA)
• The tsunami caused damage to road facilities
particularly to National Route 45.
• Number of houses considered to have been totally
destroyed or half destroyed were 128,530 and 240,332
• Tsunami killed more than 110,000 nesting seabirds at
the Midway Atoll National Wildlife Refuge.
• Damage to River levees and coastal facilities
• Soil liquefaction
• Rubble fires
Effects of Earthquake and Tsunami
• The tsunami swept about five million tons of
debris offshore, 70% sank, leaving 1.5 million
tons floating in the Pacific Ocean.
• At least six million homes - 10% of Japan's
households - were without electricity, and a
million were without water.
• Damage to fishing industry
• Psychological trauma
Fukushima Nuclear
Disaster
Fukushima Nuclear Incident
• Following the earthquake, a 15-metre tsunami
disabled the power supply and cooling of three
Fukushima Daiichi reactors, causing a nuclear
accident.
• Tsunami waves submerged and damaged the
seawater pumps for both the main condenser
circuits and the auxiliary cooling circuits.
• All three cores largely melted in the first three
days.
• The accident was rated 7 on the INES scale, due to
high radioactive releases, eventually a total of
some 940 PBq.
Radiation release
• Volatile iodine-131
• Caesium-137
• Caesium-134
• A significant problem in tracking radioactive
release was that 23 out of the 24 radiation
monitoring stations on the plant site were
disabled by the tsunami.
• On 13 February 2014, TEPCO reported 37 kBq
of cesium-134 and 93 kBq of cesium-137 were
detected per litre of groundwater sampled from a
monitoring well.
Effects of Nuclear Incident
• There have been no deaths or cases of
radiation sickness from the nuclear
accident, but over 100,000 people
were evacuated from their homes to
ensure this.
• Over 1000 deaths from maintaining the
evacuation
• Chromosomal malformations in wild
mice caught in Fukushima Prefecture
• Not long after the accident cows
started to get mysterious white spots
on their skin due to eating
contaminated grasses
• Over 9 million cubic meters of nuclear waste
was scattered over at least 113,000 locations
across Fukushima prefecture
• Dump sites with sacks of contaminated soil
were usually located on arable land
• After six years of the disaster, scientists
found radioactive Caesium in sand and water as
far as 60 miles away.
• Fear of radiation
What was done?
• According to Japan's foreign ministry, 116 countries
and 28 international organizations offered assistance.
Japan specifically requested assistance from teams
from Australia, New Zealand, South Korea, and
the United States.
• Immediately after the event, The Government of Japan
(GOJ) held National Committee for Emergency
Management, headed by Prime Minister.
• JRC performed properly for accommodation of
refugees and evacuees in schools, public buildings, and
shelters.
What was done?
• Government of Japan declared “the state of
nuclear emergency” and 140,000 residents within
20 km of the Fukushima plant, evacuated
• JMA expanded its seismic/tsunami monitoring
network by installing broadband seismometers
• The Japanese government also implemented
emergency waste disposal measures.
• The MOE issued the Master Plan on disaster
waste
• Kazama M and Noda T. Damage statistics (Summary of the 2011 off the
Pacific Coast of Tohoku Earthquake damage). Soils and foundations,
Elsevier. 2012
• Koseki et al. Cause and countermeasure way of rubble fires occurred after
2011 Great earthquake of Japan. SciVerse ScienceDirect. 2012
• Zaré M, Afrouz SG. Crisis Management of Tohoku; Japan Earthquake and
Tsunami, 11 March 2011. Iranian Journal of Public Health. 2012;41(6):12-
20.
• Koshimura S, Shuto N. Response to the 2011 Great East Japan Earthquake
and Tsunami disaster. The Royal Society. 2015
• http://www.newsweek.com/fukushima-nuclear-disaster-earthquake-
japan-679503
• https://wiseinternational.org/campaign/fukushima-disaster
• Sayuri Umeda. Legal Responses to the Great East Japan Earthquake of
2011. Library of Congress. 2012

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Japan Earthquake, Tsunami and Radiation Event 2011

  • 1. Japan Earthquake, Tsunami and Radiation Event 2011 Sada Sehar 2014-es-017
  • 2. • Time of earthquake: 14:46 (JST) • Duration: 6 minutes • Moment magnitude: 9.0 • Focus: 24 km • Epicentre: 130 km east of Sendai, and 373 km northeast of Tokyo. • Time of Tsunami: 15:35 (JST)
  • 3. Cause of Earthquake: Sub duction of the Pacific plate under the Okhotsk Plate
  • 4. Other names of Japan Earthquake • Great East Japan Earthquake • 2011 Tōhoku earthquake • 3.11 earthquake • Great Sendai Earthquake • It was the most powerful earthquake ever recorded in Japan, and the fourth most powerful earthquake in the world since modern record-keeping began in 1900.
  • 5. Foreshock: • On March 9, two days prior to the main earthquake, an M 7.3 earthquake. Aftershocks: Between March 11 and June 11, there were • 5 aftershocks that were M 7.0 or higher, • 82 aftershocks that were M 6.0 or higher, • 506 aftershocks that were M 5.0 or higher
  • 6. The Tohoku region experienced crustal movement of up to 5.3 m in the horizontal direction and up to 1.2 m in the vertical direction (subsidence) within a short period
  • 7. Effects of Earthquake and Tsunami According to an announcement by the National Police Agency (NPA) on September11, 2011 • 15,782 people had died • 4086 people were still missing • More than 60% of the dead and missing persons were aged 60 years or older • Many fire-fighters and police were also among the victims
  • 8. Effects of Earthquake and Tsunami • The number of the 2011 Great East Earthquake and Tsunami related fires is 286. (FDMA) • The tsunami caused damage to road facilities particularly to National Route 45. • Number of houses considered to have been totally destroyed or half destroyed were 128,530 and 240,332 • Tsunami killed more than 110,000 nesting seabirds at the Midway Atoll National Wildlife Refuge. • Damage to River levees and coastal facilities • Soil liquefaction • Rubble fires
  • 9. Effects of Earthquake and Tsunami • The tsunami swept about five million tons of debris offshore, 70% sank, leaving 1.5 million tons floating in the Pacific Ocean. • At least six million homes - 10% of Japan's households - were without electricity, and a million were without water. • Damage to fishing industry • Psychological trauma
  • 11. Fukushima Nuclear Incident • Following the earthquake, a 15-metre tsunami disabled the power supply and cooling of three Fukushima Daiichi reactors, causing a nuclear accident. • Tsunami waves submerged and damaged the seawater pumps for both the main condenser circuits and the auxiliary cooling circuits. • All three cores largely melted in the first three days. • The accident was rated 7 on the INES scale, due to high radioactive releases, eventually a total of some 940 PBq.
  • 12. Radiation release • Volatile iodine-131 • Caesium-137 • Caesium-134 • A significant problem in tracking radioactive release was that 23 out of the 24 radiation monitoring stations on the plant site were disabled by the tsunami. • On 13 February 2014, TEPCO reported 37 kBq of cesium-134 and 93 kBq of cesium-137 were detected per litre of groundwater sampled from a monitoring well.
  • 13. Effects of Nuclear Incident • There have been no deaths or cases of radiation sickness from the nuclear accident, but over 100,000 people were evacuated from their homes to ensure this. • Over 1000 deaths from maintaining the evacuation • Chromosomal malformations in wild mice caught in Fukushima Prefecture • Not long after the accident cows started to get mysterious white spots on their skin due to eating contaminated grasses
  • 14. • Over 9 million cubic meters of nuclear waste was scattered over at least 113,000 locations across Fukushima prefecture • Dump sites with sacks of contaminated soil were usually located on arable land • After six years of the disaster, scientists found radioactive Caesium in sand and water as far as 60 miles away. • Fear of radiation
  • 15. What was done? • According to Japan's foreign ministry, 116 countries and 28 international organizations offered assistance. Japan specifically requested assistance from teams from Australia, New Zealand, South Korea, and the United States. • Immediately after the event, The Government of Japan (GOJ) held National Committee for Emergency Management, headed by Prime Minister. • JRC performed properly for accommodation of refugees and evacuees in schools, public buildings, and shelters.
  • 16. What was done? • Government of Japan declared “the state of nuclear emergency” and 140,000 residents within 20 km of the Fukushima plant, evacuated • JMA expanded its seismic/tsunami monitoring network by installing broadband seismometers • The Japanese government also implemented emergency waste disposal measures. • The MOE issued the Master Plan on disaster waste
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  • 19. • Kazama M and Noda T. Damage statistics (Summary of the 2011 off the Pacific Coast of Tohoku Earthquake damage). Soils and foundations, Elsevier. 2012 • Koseki et al. Cause and countermeasure way of rubble fires occurred after 2011 Great earthquake of Japan. SciVerse ScienceDirect. 2012 • Zaré M, Afrouz SG. Crisis Management of Tohoku; Japan Earthquake and Tsunami, 11 March 2011. Iranian Journal of Public Health. 2012;41(6):12- 20. • Koshimura S, Shuto N. Response to the 2011 Great East Japan Earthquake and Tsunami disaster. The Royal Society. 2015 • http://www.newsweek.com/fukushima-nuclear-disaster-earthquake- japan-679503 • https://wiseinternational.org/campaign/fukushima-disaster • Sayuri Umeda. Legal Responses to the Great East Japan Earthquake of 2011. Library of Congress. 2012

Editor's Notes

  1. 1: as a result of the earthquake (including the tsunami and aftershocks)
  2. Soil liquefaction describes a phenomenon whereby a saturated or partially saturated soil substantially loses strength and stiffness in response to an applied stress, usually earthquake shaking or other sudden change in stress condition, causing it to behave like a liquid. waste or rough fragments of stone, brick, concrete, etc., especially as the debris from the demolition of buildings
  3. The International Nuclear Event Scale was introduced in 1990 by the International Atomic Energy Agency. 0-3 = incidents. 4-7 = accidents. 0-7 PBq= Peta = 10^15
  4. TEPCO= Tokyo Electric power company
  5. JRC= Japan Red Crescent society. Kan Naoto (Prime minister at that time)