Measurement results by the hour (Chofu) 17 Aug., 2026 - 23 Aug., 2026
Shown in µGy/h (microgray per hour)
Gray indicates an amount of energy (absorbed dose) when radiation hits a material object, and 1 gray (Gy) of radiation doses in the air can be converted to 1 sievert (Sv).
| Measurement time | Dose rate μGy/h (microgray per hour) |
||
|---|---|---|---|
| Maximum value | Minimum value | Average value | |
| 23:01-24:00, Sun., 23 Aug. | 0.0259 | 0.0222 | 0.0242 |
| 22:01-23:00, Sun., 23 Aug. | 0.0261 | 0.0221 | 0.0242 |
| 21:01-22:00, Sun., 23 Aug. | 0.0252 | 0.0221 | 0.0241 |
| 20:01-21:00, Sun., 23 Aug. | 0.0259 | 0.0221 | 0.0239 |
| 19:01-20:00, Sun., 23 Aug. | 0.0266 | 0.0214 | 0.0239 |
| 18:01-19:00, Sun., 23 Aug. | 0.0266 | 0.0224 | 0.0242 |
| 17:01-18:00, Sun., 23 Aug. | 0.0260 | 0.0213 | 0.0243 |
| 16:01-17:00, Sun., 23 Aug. | 0.0266 | 0.0230 | 0.0245 |
| 15:01-16:00, Sun., 23 Aug. | 0.0257 | 0.0225 | 0.0242 |
| 14:01-15:00, Sun., 23 Aug. | 0.0263 | 0.0220 | 0.0244 |
| 13:01-14:00, Sun., 23 Aug. | 0.0262 | 0.0225 | 0.0242 |
| 12:01-13:00, Sun., 23 Aug. | 0.0262 | 0.0226 | 0.0242 |
| 11:01-12:00, Sun., 23 Aug. | 0.0260 | 0.0221 | 0.0243 |
| 10:01-11:00, Sun., 23 Aug. | 0.0254 | 0.0220 | 0.0239 |
| 09:01-10:00, Sun., 23 Aug. | 0.0263 | 0.0224 | 0.0241 |
| 08:01-09:00, Sun., 23 Aug. | 0.0262 | 0.0221 | 0.0240 |
| 07:01-08:00, Sun., 23 Aug. | 0.0262 | 0.0215 | 0.0240 |
| 06:01-07:00, Sun., 23 Aug. | 0.0273 | 0.0221 | 0.0244 |
| 05:01-06:00, Sun., 23 Aug. | 0.0259 | 0.0216 | 0.0242 |
| 04:01-05:00, Sun., 23 Aug. | 0.0258 | 0.0224 | 0.0244 |
| 03:01-04:00, Sun., 23 Aug. | 0.0266 | 0.0224 | 0.0244 |
| 02:01-03:00, Sun., 23 Aug. | 0.0262 | 0.0224 | 0.0240 |
| 01:01-02:00, Sun., 23 Aug. | 0.0262 | 0.0223 | 0.0241 |
| 00:01-01:00, Sun., 23 Aug. | 0.0262 | 0.0225 | 0.0240 |
| 23:01-24:00, Sat., 22 Aug. | 0.0256 | 0.0217 | 0.0241 |
| 22:01-23:00, Sat., 22 Aug. | 0.0263 | 0.0222 | 0.0244 |
| 21:01-22:00, Sat., 22 Aug. | 0.0283 | 0.0234 | 0.0256 |
| 20:01-21:00, Sat., 22 Aug. | 0.0366 | 0.0262 | 0.0310 |
| 19:01-20:00, Sat., 22 Aug. | 0.0530 | 0.0367 | 0.0451 |
| 18:01-19:00, Sat., 22 Aug. | 0.0551 | 0.0371 | 0.0465 |
| 17:01-18:00, Sat., 22 Aug. | 0.0416 | 0.0301 | 0.0342 |
| 16:01-17:00, Sat., 22 Aug. | 0.0403 | 0.0331 | 0.0371 |
| 15:01-16:00, Sat., 22 Aug. | 0.0378 | 0.0233 | 0.0310 |
| 14:01-15:00, Sat., 22 Aug. | 0.0266 | 0.0230 | 0.0251 |
| 13:01-14:00, Sat., 22 Aug. | 0.0271 | 0.0221 | 0.0248 |
| 12:01-13:00, Sat., 22 Aug. | 0.0271 | 0.0221 | 0.0249 |
| 11:01-12:00, Sat., 22 Aug. | 0.0267 | 0.0226 | 0.0249 |
| 10:01-11:00, Sat., 22 Aug. | 0.0263 | 0.0232 | 0.0250 |
| 09:01-10:00, Sat., 22 Aug. | 0.0267 | 0.0232 | 0.0249 |
| 08:01-09:00, Sat., 22 Aug. | 0.0270 | 0.0231 | 0.0251 |
| 07:01-08:00, Sat., 22 Aug. | 0.0269 | 0.0227 | 0.0251 |
| 06:01-07:00, Sat., 22 Aug. | 0.0283 | 0.0231 | 0.0252 |
| 05:01-06:00, Sat., 22 Aug. | 0.0274 | 0.0235 | 0.0253 |
| 04:01-05:00, Sat., 22 Aug. | 0.0272 | 0.0230 | 0.0249 |
| 03:01-04:00, Sat., 22 Aug. | 0.0268 | 0.0231 | 0.0249 |
| 02:01-03:00, Sat., 22 Aug. | 0.0263 | 0.0223 | 0.0246 |
| 01:01-02:00, Sat., 22 Aug. | 0.0273 | 0.0225 | 0.0248 |
| 00:01-01:00, Sat., 22 Aug. | 0.0269 | 0.0225 | 0.0246 |
| 23:01-24:00, Fri., 21 Aug. | 0.0273 | 0.0229 | 0.0249 |
| 22:01-23:00, Fri., 21 Aug. | 0.0289 | 0.0242 | 0.0267 |
| 21:01-22:00, Fri., 21 Aug. | 0.0357 | 0.0271 | 0.0317 |
| 20:01-21:00, Fri., 21 Aug. | 0.0379 | 0.0306 | 0.0351 |
| 19:01-20:00, Fri., 21 Aug. | 0.0320 | 0.0225 | 0.0265 |
| 18:01-19:00, Fri., 21 Aug. | 0.0262 | 0.0224 | 0.0243 |
| 17:01-18:00, Fri., 21 Aug. | 0.0263 | 0.0224 | 0.0245 |
| 16:01-17:00, Fri., 21 Aug. | 0.0273 | 0.0228 | 0.0249 |
| 15:01-16:00, Fri., 21 Aug. | 0.0279 | 0.0238 | 0.0259 |
| 14:01-15:00, Fri., 21 Aug. | 0.0283 | 0.0238 | 0.0265 |
| 13:01-14:00, Fri., 21 Aug. | 0.0263 | 0.0230 | 0.0246 |
| 12:01-13:00, Fri., 21 Aug. | 0.0263 | 0.0220 | 0.0247 |
| 11:01-12:00, Fri., 21 Aug. | 0.0265 | 0.0231 | 0.0246 |
| 10:01-11:00, Fri., 21 Aug. | 0.0274 | 0.0225 | 0.0248 |
| 09:01-10:00, Fri., 21 Aug. | 0.0271 | 0.0231 | 0.0249 |
| 08:01-09:00, Fri., 21 Aug. | 0.0276 | 0.0236 | 0.0253 |
| 07:01-08:00, Fri., 21 Aug. | 0.0277 | 0.0231 | 0.0253 |
| 06:01-07:00, Fri., 21 Aug. | 0.0269 | 0.0235 | 0.0253 |
| 05:01-06:00, Fri., 21 Aug. | 0.0272 | 0.0237 | 0.0254 |
| 04:01-05:00, Fri., 21 Aug. | 0.0269 | 0.0230 | 0.0249 |
| 03:01-04:00, Fri., 21 Aug. | 0.0266 | 0.0221 | 0.0246 |
| 02:01-03:00, Fri., 21 Aug. | 0.0264 | 0.0224 | 0.0246 |
| 01:01-02:00, Fri., 21 Aug. | 0.0262 | 0.0222 | 0.0245 |
| 00:01-01:00, Fri., 21 Aug. | 0.0266 | 0.0217 | 0.0244 |
| 23:01-24:00, Thu., 20 Aug. | 0.0271 | 0.0224 | 0.0246 |
| 22:01-23:00, Thu., 20 Aug. | 0.0273 | 0.0229 | 0.0245 |
| 21:01-22:00, Thu., 20 Aug. | 0.0271 | 0.0229 | 0.0249 |
| 20:01-21:00, Thu., 20 Aug. | 0.0273 | 0.0226 | 0.0249 |
| 19:01-20:00, Thu., 20 Aug. | 0.0264 | 0.0227 | 0.0246 |
| 18:01-19:00, Thu., 20 Aug. | 0.0267 | 0.0225 | 0.0246 |
| 17:01-18:00, Thu., 20 Aug. | 0.0284 | 0.0227 | 0.0246 |
| 16:01-17:00, Thu., 20 Aug. | 0.0266 | 0.0222 | 0.0244 |
| 15:01-16:00, Thu., 20 Aug. | 0.0283 | 0.0228 | 0.0247 |
| 14:01-15:00, Thu., 20 Aug. | 0.0263 | 0.0230 | 0.0247 |
| 13:01-14:00, Thu., 20 Aug. | 0.0262 | 0.0226 | 0.0245 |
| 12:01-13:00, Thu., 20 Aug. | 0.0269 | 0.0228 | 0.0246 |
| 11:01-12:00, Thu., 20 Aug. | 0.0266 | 0.0227 | 0.0245 |
| 10:01-11:00, Thu., 20 Aug. | 0.0266 | 0.0229 | 0.0248 |
| 09:01-10:00, Thu., 20 Aug. | 0.0273 | 0.0229 | 0.0251 |
| 08:01-09:00, Thu., 20 Aug. | 0.0271 | 0.0233 | 0.0252 |
| 07:01-08:00, Thu., 20 Aug. | 0.0266 | 0.0228 | 0.0247 |
| 06:01-07:00, Thu., 20 Aug. | 0.0265 | 0.0230 | 0.0247 |
| 05:01-06:00, Thu., 20 Aug. | 0.0270 | 0.0228 | 0.0245 |
| 04:01-05:00, Thu., 20 Aug. | 0.0262 | 0.0224 | 0.0244 |
| 03:01-04:00, Thu., 20 Aug. | 0.0259 | 0.0224 | 0.0243 |
| 02:01-03:00, Thu., 20 Aug. | 0.0266 | 0.0221 | 0.0244 |
| 01:01-02:00, Thu., 20 Aug. | 0.0262 | 0.0225 | 0.0245 |
| 00:01-01:00, Thu., 20 Aug. | 0.0262 | 0.0226 | 0.0245 |
| 23:01-24:00, Wed., 19 Aug. | 0.0262 | 0.0217 | 0.0242 |
| 22:01-23:00, Wed., 19 Aug. | 0.0265 | 0.0224 | 0.0243 |
| 21:01-22:00, Wed., 19 Aug. | 0.0262 | 0.0220 | 0.0241 |
| 20:01-21:00, Wed., 19 Aug. | 0.0263 | 0.0221 | 0.0242 |
| 19:01-20:00, Wed., 19 Aug. | 0.0264 | 0.0225 | 0.0242 |
| 18:01-19:00, Wed., 19 Aug. | 0.0266 | 0.0226 | 0.0245 |
| 17:01-18:00, Wed., 19 Aug. | 0.0267 | 0.0225 | 0.0244 |
| 16:01-17:00, Wed., 19 Aug. | 0.0263 | 0.0227 | 0.0243 |
| 15:01-16:00, Wed., 19 Aug. | 0.0268 | 0.0225 | 0.0245 |
| 14:01-15:00, Wed., 19 Aug. | 0.0273 | 0.0228 | 0.0246 |
| 13:01-14:00, Wed., 19 Aug. | 0.0260 | 0.0226 | 0.0244 |
| 12:01-13:00, Wed., 19 Aug. | 0.0264 | 0.0224 | 0.0244 |
| 11:01-12:00, Wed., 19 Aug. | 0.0271 | 0.0225 | 0.0246 |
| 10:01-11:00, Wed., 19 Aug. | 0.0272 | 0.0231 | 0.0251 |
| 09:01-10:00, Wed., 19 Aug. | 0.0273 | 0.0233 | 0.0250 |
| 08:01-09:00, Wed., 19 Aug. | 0.0269 | 0.0231 | 0.0252 |
| 07:01-08:00, Wed., 19 Aug. | 0.0271 | 0.0228 | 0.0252 |
| 06:01-07:00, Wed., 19 Aug. | 0.0273 | 0.0243 | 0.0258 |
| 05:01-06:00, Wed., 19 Aug. | 0.0273 | 0.0235 | 0.0254 |
| 04:01-05:00, Wed., 19 Aug. | 0.0265 | 0.0224 | 0.0244 |
| 03:01-04:00, Wed., 19 Aug. | 0.0261 | 0.0225 | 0.0244 |
| 02:01-03:00, Wed., 19 Aug. | 0.0265 | 0.0229 | 0.0245 |
| 01:01-02:00, Wed., 19 Aug. | 0.0267 | 0.0223 | 0.0244 |
| 00:01-01:00, Wed., 19 Aug. | 0.0262 | 0.0225 | 0.0244 |
| 23:01-24:00, Tue., 18 Aug. | 0.0263 | 0.0221 | 0.0242 |
| 22:01-23:00, Tue., 18 Aug. | 0.0262 | 0.0217 | 0.0241 |
| 21:01-22:00, Tue., 18 Aug. | 0.0265 | 0.0226 | 0.0241 |
| 20:01-21:00, Tue., 18 Aug. | 0.0259 | 0.0224 | 0.0241 |
| 19:01-20:00, Tue., 18 Aug. | 0.0263 | 0.0217 | 0.0243 |
| 18:01-19:00, Tue., 18 Aug. | 0.0259 | 0.0223 | 0.0241 |
| 17:01-18:00, Tue., 18 Aug. | 0.0270 | 0.0221 | 0.0242 |
| 16:01-17:00, Tue., 18 Aug. | 0.0264 | 0.0221 | 0.0242 |
| 15:01-16:00, Tue., 18 Aug. | 0.0266 | 0.0224 | 0.0243 |
| 14:01-15:00, Tue., 18 Aug. | 0.0260 | 0.0221 | 0.0243 |
| 13:01-14:00, Tue., 18 Aug. | 0.0263 | 0.0220 | 0.0242 |
| 12:01-13:00, Tue., 18 Aug. | 0.0267 | 0.0221 | 0.0242 |
| 11:01-12:00, Tue., 18 Aug. | 0.0268 | 0.0226 | 0.0243 |
| 10:01-11:00, Tue., 18 Aug. | 0.0263 | 0.0229 | 0.0246 |
| 09:01-10:00, Tue., 18 Aug. | 0.0265 | 0.0222 | 0.0247 |
| 08:01-09:00, Tue., 18 Aug. | 0.0270 | 0.0237 | 0.0251 |
| 07:01-08:00, Tue., 18 Aug. | 0.0286 | 0.0242 | 0.0261 |
| 06:01-07:00, Tue., 18 Aug. | 0.0282 | 0.0242 | 0.0264 |
| 05:01-06:00, Tue., 18 Aug. | 0.0287 | 0.0242 | 0.0264 |
| 04:01-05:00, Tue., 18 Aug. | 0.0268 | 0.0233 | 0.0253 |
| 03:01-04:00, Tue., 18 Aug. | 0.0262 | 0.0223 | 0.0246 |
| 02:01-03:00, Tue., 18 Aug. | 0.0259 | 0.0228 | 0.0243 |
| 01:01-02:00, Tue., 18 Aug. | 0.0257 | 0.0221 | 0.0241 |
| 00:01-01:00, Tue., 18 Aug. | 0.0263 | 0.0225 | 0.0242 |
| 23:01-24:00, Mon., 17 Aug. | 0.0259 | 0.0227 | 0.0242 |
| 22:01-23:00, Mon., 17 Aug. | 0.0260 | 0.0225 | 0.0241 |
| 21:01-22:00, Mon., 17 Aug. | 0.0256 | 0.0220 | 0.0238 |
| 20:01-21:00, Mon., 17 Aug. | 0.0258 | 0.0221 | 0.0242 |
| 19:01-20:00, Mon., 17 Aug. | 0.0260 | 0.0222 | 0.0241 |
| 18:01-19:00, Mon., 17 Aug. | 0.0260 | 0.0218 | 0.0241 |
| 17:01-18:00, Mon., 17 Aug. | 0.0262 | 0.0223 | 0.0243 |
| 16:01-17:00, Mon., 17 Aug. | 0.0259 | 0.0215 | 0.0240 |
| 15:01-16:00, Mon., 17 Aug. | 0.0264 | 0.0224 | 0.0243 |
| 14:01-15:00, Mon., 17 Aug. | 0.0259 | 0.0217 | 0.0241 |
| 13:01-14:00, Mon., 17 Aug. | 0.0270 | 0.0226 | 0.0240 |
| 12:01-13:00, Mon., 17 Aug. | 0.0260 | 0.0220 | 0.0242 |
| 11:01-12:00, Mon., 17 Aug. | 0.0263 | 0.0217 | 0.0242 |
| 10:01-11:00, Mon., 17 Aug. | 0.0261 | 0.0224 | 0.0241 |
| 09:01-10:00, Mon., 17 Aug. | 0.0266 | 0.0217 | 0.0240 |
| 08:01-09:00, Mon., 17 Aug. | 0.0260 | 0.0220 | 0.0240 |
| 07:01-08:00, Mon., 17 Aug. | 0.0266 | 0.0217 | 0.0239 |
| 06:01-07:00, Mon., 17 Aug. | 0.0263 | 0.0218 | 0.0240 |
| 05:01-06:00, Mon., 17 Aug. | 0.0256 | 0.0223 | 0.0240 |
| 04:01-05:00, Mon., 17 Aug. | 0.0267 | 0.0226 | 0.0241 |
| 03:01-04:00, Mon., 17 Aug. | 0.0259 | 0.0221 | 0.0238 |
| 02:01-03:00, Mon., 17 Aug. | 0.0260 | 0.0221 | 0.0239 |
| 01:01-02:00, Mon., 17 Aug. | 0.0255 | 0.0222 | 0.0241 |
| 00:01-01:00, Mon., 17 Aug. | 0.0263 | 0.0225 | 0.0241 |