Japan 2011

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This web page is being drafted by Austin Tate and his colleagues at the University of Edinburgh in support of Japan and its people. It is personal effort and not sponsored by any organisation. Currently the data being shown is tentative and needs to be checked with experts to ensure it is valid. Please do not rely on data here... use the authoritative original sources.

Some Maps Representing Radiation and Other Data on Japan

Other Useful Links


Fukushima Dai-ichi Nuclear Power Plant

General information about the incident which began in March 2011 is at http://en.wikipedia.org/wiki/Fukushima_I_nuclear_accidents

The Japanese Government regular postings of radiation data can be found at:

There is also data for Tokyo at:

Radiological Monitoring for area of Fukushima Dai-ichi Nuclear Power Plant in Ibaraki Prefecture is provided in regularly updated tables via:

  • http://www.mext.go.jp/english/radioactivity_level/
  • Charts in PDF form are available via "Reading of environmental radioactivity level by prefecture, Time series data (Graph)" and "Reading of environmental radioactivity level".
  • Readings from individual monitoring posts on land and off-shore in the area are also available via "Readings at Monitoring Post out of 20 Km Zone of Fukushima Dai-ichi NPP" and "Readings of Sea Area Monitoring at Post Out of Fukushima Dai-ichi NPP".

[img_assist|nid=999|title=Radiation in Daily Life|desc=|link=node|align=center|width=640|height=451]

Chart from http://www.mext.go.jp/english/radioactivity_level/ (27-Mar-2011)

Sample Chart for Interpretation (for parts of 26-Mar-2011 and 27-Mar-2011):

Interpretation Notes

  1. Row 8 indicates Ibaraki Prefecture where Fuchushima Plant is based.
  2. Charts are one page per day with one hour time slices per column.
  3. Radiation dose is provided in microsieverts (μSv) per hour (μSv)
  4. Page 3 provides a simple guide diagram for typical radiation dose rates per year.
  5. Compare per hour and year doses by *24*365 (e.g. approx. 1.14 μSv per hour = 10,000 μSv per year).

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