Ambient Dose Rate Map – Environmental Radioactivity and Radiation in Japan

Condition Selection

You can create a graph of ambient dose rates using measurement data from monitoring posts or survey meters registered in the Environmental Radiation Database. You can easily create a graph by setting conditions according to the screen display.

The number of relevant data records is counted from the point when all required items are selected.

FAQ on how to read the Ambient Dose Rate Map is here

Select measurement deviceRequired

Monitoring Post (April 2012 onwards) Monitoring Post (March 2012 and earlier) Survey Meter (March 2009 and earlier)

Survey PeriodRequired

Specify the period you wish to search.

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*Please specify a survey period within 2 years.

Survey RegionRequired

Select one location from all 47 prefectures.

Measurement LocationRequired

Selecting a prefecture displays available measurement locations.

Selecting multiple locations generates multiple graphs.

No measurement location selection is required.

Relevant Data {{ countResult.count }} Items

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Display the ambient dose rate map

To edit the graph title, axis minimum/maximum values, etc., check the “Edit Graph” checkbox and press the “Apply Changes” button. This will redraw the graph with the edited settings.

FAQ on how to read the ambient dose rate map is here

Edit graph

Title

*Enter your desired title within 30 characters. Titles exceeding 30 characters will be invalid.

Display Y-axis logarithmically

Minimum

Maximum

Scale Interval

*Enter a multiple of the scale interval for the maximum value. If not a multiple, the maximum value may not display correctly.

Filter Conditions

The search results above were found using the following search criteria.

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Important Notes for Use

When citing data, clearly state in the printed material or other medium that the information is sourced from this database.
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