High Radiation Readings 30 km Northwest of Fukushima Daiichi

MEXT publishes radiation readings for all prefectures, except Miyagi and Fukushima, by hour as well as readings from monitoring posts 20 km or more away from the Fukushima Daiichi nuclear power station.

The highest readings among the prefectures for which readings were reported on March 18 were in Ibaraki Prefecture, just south of Fukushima Prefecture

  • 0-1 0.203 μSv/hr
  • 6-7 0.198 μSv/hr
  • 11-12 0.192 μSv/hr
  • 14-15 0.189 μSv/hr
  • 16-17 0.187 μSv/hr

These readings are about four times the average reading in Tokyo of 0.050 μSv/hr for the period between Mar 17 9 am and Mar 18 9 am.

The highest readings reported for the region more than 20 km away from Fukushima Daiichi were recorded 30 km northwest of Fukushima Daiichi Mar 18.

  • 13:32 150 μSv/hr
  • 12:33 140 μSv/hr
  • 11:33 140 μSv/hr

This is almost 3000 times the average reading in Tokyo.  This means that a person would get in 20 hrs the equivalent of a year’s dose from ambient background radiation.

March 16 readings of 330 μSv/hr were recorded 20 km northwest of Fukushima Daiichi.

Geoff Zeiss

Geoff Zeiss

Geoff Zeiss has more than 20 years experience in the geospatial software industry and 15 years experience developing enterprise geospatial solutions for the utilities, communications, and public works industries. His particular interests include the convergence of BIM, CAD, geospatial, and 3D. In recognition of his efforts to evangelize geospatial in vertical industries such as utilities and construction, Geoff received the Geospatial Ambassador Award at Geospatial World Forum 2014. Currently Geoff is Principal at Between the Poles, a thought leadership consulting firm. From 2001 to 2012 Geoff was Director of Utility Industry Program at Autodesk Inc, where he was responsible for thought leadership for the utility industry program. From 1999 to 2001 he was Director of Enterprise Software Development at Autodesk. He received one of ten annual global technology awards in 2004 from Oracle Corporation for technical innovation and leadership in the use of Oracle. Prior to Autodesk Geoff was Director of Product Development at VISION* Solutions. VISION* Solutions is credited with pioneering relational spatial data management, CAD/GIS integration, and long transactions (data versioning) in the utility, communications, and public works industries. Geoff is a frequent speaker at geospatial and utility events around the world including Geospatial World Forum, Where 2.0, MundoGeo Connect (Brazil), Middle East Spatial Geospatial Forum, India Geospatial Forum, Location Intelligence, Asia Geospatial Forum, and GITA events in US, Japan and Australia. Geoff received Speaker Excellence Awards at GITA 2007-2009.

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