Fukushima Prefecture Environmental Radiation Monitoring-Mesh Investigation (detail survey)
FY 2014 - FY 2016   Fukushima Prefecture

The Fukushima Prefecture Government has continuously been conducting the mesh survey with 2 km grids covering whole Fukushima Prefecture to understand the distribution of air dose rate in the whole...
The Fukushima Prefecture Government has continuously been conducting the mesh survey with 2 km grids covering whole Fukushima Prefecture to understand the distribution of air dose rate in the whole prefecture after the Fukushima Dai-ichi NPP accident. Throughout the past surveys, some measurement points showed the tendencies of higher air dose rates or less temporal decrease of air dose rates compared to neighboring areas. Therefore the Fukushima Prefecture Government conducted detail surveys with grids more precious than 2 km grids and released the results to the public. This data was created based on the results of Fukushima Prefecture Environmental Radiation Monitoring in Mesh Survey (detail survey) (from FY 2014 to FY 2016) released to the public in the Fukushima Prefecture Government website.

Readings of the Fukushima Prefecture Environmental Radiation Monitoring in Mesh Survey (detail survey) ( From October 2016 to November 2016 )
  1. This data was created based on the detail survey with a total 249 measurement points selected from the Ninth Fukushima Prefecture Environmental Radiation Monitoring in Mesh Survey where the following conditions were met:
    • The measurement points where air dose rates were higher than neighboring areas.
    • The measurement points where less temporal decrease of air dose rates were observed, compared to neighboring areas.
    • The measurement points where air dose rates increased compared to the previous survey.
    • The measurement points upon requests by the local governments.
    *Note: "Difficult-to-return zone", "Restricted residence area", and "Zone in preparation for the lifting of the evacuation order" were excluded.
  2. The 1 km grids with the selected measured points as their centers were subdivided into 100 m grids. The 100 m grids where roads and/or public facilities were located were selected and air dose rates were measured at the height of 1 m from the ground from October 3, 2016 to November 24, 2016.
Readings of the Fukushima Prefecture Environmental Radiation Monitoring in Mesh Survey (detail survey) ( From October 2015 to December 2015 )
  1. This data was created based on the detail survey with a total 243 measurement points selected from the Eighth Fukushima Prefecture Environmental Radiation Monitoring in Mesh Survey where the following conditions were met:
    • The measurement points where air dose rates were higher than neighboring areas.
    • The measurement points where less temporal decrease of air dose rates were observed, compared to neighboring areas.
    • The measurement points where air dose rates increased compared to the previous survey.
    • The measurement points upon requests by the local governments.
    *Note: "Difficult-to-return zone", "Restricted residence area", and "Zone in preparation for the lifting of the evacuation order" were excluded.
  2. The 1 km grids with the selected measured points as their centers were subdivided into 100 m grids. The 100 m grids where roads and/or public facilities were located were selected and air dose rates were measured at the height of 1 m from the ground from October 8, 2015 to December 8, 2015.
Readings of the Fukushima Prefecture Environmental Radiation Monitoring in Mesh Survey (detail survey) ( From October 2014 to November 2014 )
  1. This data was created based on the detail survey with a total 254 measurement points selected from the Seventh Fukushima Prefecture Environmental Radiation Monitoring in Mesh Survey where the following conditions were met:
    • The measurement points where air dose rates were higher than neighboring areas.
    • The measurement points where less temporal decrease of air dose rates were observed, compared to neighboring areas.
    • The measurement points where air dose rates increased compared to the previous survey.
    • The measurement points upon requests by the local governments.
    *Note: "Difficult-to-return zone", "Restricted residence area", and "Zone in preparation for the lifting of the evacuation order" were excluded.
  2. The 1 km grids with the selected measured points as their centers were subdivided into 100 m grids. The 100 m grids where roads and/or public facilities were located were selected and air dose rates were measured at the height of 1 m from the ground from October 2, 2014 to November 20, 2014.
Publicly available data collected from the website of the relevant organizations and converted into CSV, XML, and KML formats that were easy to use.

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CSV files that have common item names over different survey projects for comparison analyses.

Readings of the Fukushima Prefecture Environmental Radiation Monitoring in Mesh Survey (detail survey) ( From October 2016 to November 2016 )
Readings of the Fukushima Prefecture Environmental Radiation Monitoring in Mesh Survey (detail survey) ( From October 2015 to December 2015 )
Readings of the Fukushima Prefecture Environmental Radiation Monitoring in Mesh Survey (detail survey) ( From October 2014 to November 2014 )