Radiological Situation in Saga Prefecture
The background radiation in Saga Prefecture as of is within its usual limits and is 0.029-0.076 µSv/h (the lowest and highest values for the last 24 hours). Values are measured by various devices, from online monitoring stations to daily manual measurements by relevant government agencies at stationary observation posts.
The highest value of the power of the exposure dose (background radiation) for the last day was recorded at 16:00 at the observation post by address Sagakendairakyokumonitaringuposuto in Karatsu-shi and it is 0.076 µSv/h, which is below the control level.
Why Is Verification Necessary?
Map readings are indicative data from their respective providers. If a value appears unusual, check whether the change persists and consult the provider.
For emergency decisions, rely on official information from the relevant authorities.
Data Sources
Radiation dose rate: Safecast Radnote. Wind direction and speed: Open-Meteo.
Map backgrounds: OpenStreetMap, JMA Himawari, and NASA GIBS.
Fukushima restricted zone: the web geometry is a high-resolution vector derived from the official Fukushima Prefecture evacuation-zone concept map (31 March 2025) and georeferenced through the JGD2011 ArcGIS evacuation-zone raster; narrow map-rendering seams between adjacent sections were closed and detached non-zone artifacts removed while mapped release exclusions were preserved; the latest status is checked against the METI evacuation-zone concept map (1 April 2026).
The total number of monitoring posts in Saga Prefecture – 32 posts.
As of September 19, 2026, 16:20