Concerned with the lack of understandable information in the current situation, the Institute for Information Design Japan - IIDj, is collecting available measurements to provide a consistent and comprehensive Japan Radiation Map. Most of the data used are updated hourly, however some sources provide data in larger intervals or require manual transcription; in this case we can not guarantee regular updates. We do intentionally refrain from using any interpretative elements - such as thresholds or advisories. This needs to happen somewhere else with more competent people involved. Measurements are interchangeably provided in Grey/Sievert units at the source. Here all measurements are given in the nano Sievert/hour (nSv/h) measure - following the simplified equation where 1 Grey (Gy) = 1 Sievert (Sv).
IIDj, Institute for Information Design Japan | mail Disclaimer: IIDj has no past nor current business relations with any of the actors in the nuclear power industry.
This map shows most recent radiation measurements, collected from different sources. On roll-over specific information is provided for that particular location where radiation levels are visualized by the colored square area's size. Locations marked with the + sign reveal more locations on zoom-in. Click here for more details.