Measurement results by the hour (Chofu) 22 Dec., 2025 - 28 Dec., 2025
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., 28 Dec. | 0.0317 | 0.0278 | 0.0298 |
| 22:01-23:00, Sun., 28 Dec. | 0.0314 | 0.0269 | 0.0294 |
| 21:01-22:00, Sun., 28 Dec. | 0.0314 | 0.0267 | 0.0288 |
| 20:01-21:00, Sun., 28 Dec. | 0.0301 | 0.0258 | 0.0283 |
| 19:01-20:00, Sun., 28 Dec. | 0.0307 | 0.0255 | 0.0278 |
| 18:01-19:00, Sun., 28 Dec. | 0.0291 | 0.0258 | 0.0277 |
| 17:01-18:00, Sun., 28 Dec. | 0.0301 | 0.0256 | 0.0274 |
| 16:01-17:00, Sun., 28 Dec. | 0.0295 | 0.0248 | 0.0275 |
| 15:01-16:00, Sun., 28 Dec. | 0.0297 | 0.0258 | 0.0280 |
| 14:01-15:00, Sun., 28 Dec. | 0.0300 | 0.0258 | 0.0281 |
| 13:01-14:00, Sun., 28 Dec. | 0.0308 | 0.0254 | 0.0279 |
| 12:01-13:00, Sun., 28 Dec. | 0.0299 | 0.0261 | 0.0282 |
| 11:01-12:00, Sun., 28 Dec. | 0.0313 | 0.0266 | 0.0291 |
| 10:01-11:00, Sun., 28 Dec. | 0.0320 | 0.0280 | 0.0303 |
| 09:01-10:00, Sun., 28 Dec. | 0.0343 | 0.0290 | 0.0313 |
| 08:01-09:00, Sun., 28 Dec. | 0.0351 | 0.0298 | 0.0321 |
| 07:01-08:00, Sun., 28 Dec. | 0.0345 | 0.0298 | 0.0319 |
| 06:01-07:00, Sun., 28 Dec. | 0.0333 | 0.0297 | 0.0316 |
| 05:01-06:00, Sun., 28 Dec. | 0.0336 | 0.0290 | 0.0315 |
| 04:01-05:00, Sun., 28 Dec. | 0.0333 | 0.0285 | 0.0314 |
| 03:01-04:00, Sun., 28 Dec. | 0.0335 | 0.0281 | 0.0310 |
| 02:01-03:00, Sun., 28 Dec. | 0.0325 | 0.0273 | 0.0300 |
| 01:01-02:00, Sun., 28 Dec. | 0.0321 | 0.0272 | 0.0301 |
| 00:01-01:00, Sun., 28 Dec. | 0.0330 | 0.0285 | 0.0303 |
| 23:01-24:00, Sat., 27 Dec. | 0.0326 | 0.0283 | 0.0303 |
| 22:01-23:00, Sat., 27 Dec. | 0.0316 | 0.0274 | 0.0295 |
| 21:01-22:00, Sat., 27 Dec. | 0.0322 | 0.0274 | 0.0292 |
| 20:01-21:00, Sat., 27 Dec. | 0.0316 | 0.0256 | 0.0285 |
| 19:01-20:00, Sat., 27 Dec. | 0.0308 | 0.0263 | 0.0284 |
| 18:01-19:00, Sat., 27 Dec. | 0.0297 | 0.0261 | 0.0281 |
| 17:01-18:00, Sat., 27 Dec. | 0.0304 | 0.0261 | 0.0281 |
| 16:01-17:00, Sat., 27 Dec. | 0.0308 | 0.0250 | 0.0283 |
| 15:01-16:00, Sat., 27 Dec. | 0.0299 | 0.0259 | 0.0282 |
| 14:01-15:00, Sat., 27 Dec. | 0.0299 | 0.0255 | 0.0278 |
| 13:01-14:00, Sat., 27 Dec. | 0.0310 | 0.0259 | 0.0279 |
| 12:01-13:00, Sat., 27 Dec. | 0.0294 | 0.0255 | 0.0280 |
| 11:01-12:00, Sat., 27 Dec. | 0.0305 | 0.0252 | 0.0280 |
| 10:01-11:00, Sat., 27 Dec. | 0.0307 | 0.0264 | 0.0282 |
| 09:01-10:00, Sat., 27 Dec. | 0.0311 | 0.0270 | 0.0285 |
| 08:01-09:00, Sat., 27 Dec. | 0.0301 | 0.0271 | 0.0287 |
| 07:01-08:00, Sat., 27 Dec. | 0.0311 | 0.0268 | 0.0286 |
| 06:01-07:00, Sat., 27 Dec. | 0.0305 | 0.0260 | 0.0287 |
| 05:01-06:00, Sat., 27 Dec. | 0.0305 | 0.0260 | 0.0285 |
| 04:01-05:00, Sat., 27 Dec. | 0.0308 | 0.0264 | 0.0285 |
| 03:01-04:00, Sat., 27 Dec. | 0.0311 | 0.0267 | 0.0286 |
| 02:01-03:00, Sat., 27 Dec. | 0.0308 | 0.0263 | 0.0285 |
| 01:01-02:00, Sat., 27 Dec. | 0.0308 | 0.0258 | 0.0286 |
| 00:01-01:00, Sat., 27 Dec. | 0.0307 | 0.0256 | 0.0284 |
| 23:01-24:00, Fri., 26 Dec. | 0.0307 | 0.0265 | 0.0287 |
| 22:01-23:00, Fri., 26 Dec. | 0.0308 | 0.0260 | 0.0287 |
| 21:01-22:00, Fri., 26 Dec. | 0.0321 | 0.0263 | 0.0286 |
| 20:01-21:00, Fri., 26 Dec. | 0.0313 | 0.0270 | 0.0291 |
| 19:01-20:00, Fri., 26 Dec. | 0.0319 | 0.0269 | 0.0294 |
| 18:01-19:00, Fri., 26 Dec. | 0.0316 | 0.0274 | 0.0292 |
| 17:01-18:00, Fri., 26 Dec. | 0.0311 | 0.0274 | 0.0293 |
| 16:01-17:00, Fri., 26 Dec. | 0.0321 | 0.0279 | 0.0295 |
| 15:01-16:00, Fri., 26 Dec. | 0.0310 | 0.0273 | 0.0293 |
| 14:01-15:00, Fri., 26 Dec. | 0.0314 | 0.0272 | 0.0293 |
| 13:01-14:00, Fri., 26 Dec. | 0.0307 | 0.0259 | 0.0290 |
| 12:01-13:00, Fri., 26 Dec. | 0.0310 | 0.0259 | 0.0287 |
| 11:01-12:00, Fri., 26 Dec. | 0.0310 | 0.0268 | 0.0287 |
| 10:01-11:00, Fri., 26 Dec. | 0.0306 | 0.0258 | 0.0286 |
| 09:01-10:00, Fri., 26 Dec. | 0.0308 | 0.0259 | 0.0284 |
| 08:01-09:00, Fri., 26 Dec. | 0.0304 | 0.0255 | 0.0284 |
| 07:01-08:00, Fri., 26 Dec. | 0.0297 | 0.0257 | 0.0282 |
| 06:01-07:00, Fri., 26 Dec. | 0.0311 | 0.0270 | 0.0291 |
| 05:01-06:00, Fri., 26 Dec. | 0.0317 | 0.0270 | 0.0289 |
| 04:01-05:00, Fri., 26 Dec. | 0.0305 | 0.0264 | 0.0284 |
| 03:01-04:00, Fri., 26 Dec. | 0.0312 | 0.0257 | 0.0281 |
| 02:01-03:00, Fri., 26 Dec. | 0.0301 | 0.0251 | 0.0284 |
| 01:01-02:00, Fri., 26 Dec. | 0.0303 | 0.0265 | 0.0285 |
| 00:01-01:00, Fri., 26 Dec. | 0.0311 | 0.0264 | 0.0288 |
| 23:01-24:00, Thu., 25 Dec. | 0.0349 | 0.0278 | 0.0307 |
| 22:01-23:00, Thu., 25 Dec. | 0.0372 | 0.0310 | 0.0337 |
| 21:01-22:00, Thu., 25 Dec. | 0.0537 | 0.0355 | 0.0445 |
| 20:01-21:00, Thu., 25 Dec. | 0.0561 | 0.0486 | 0.0521 |
| 19:01-20:00, Thu., 25 Dec. | 0.0517 | 0.0363 | 0.0430 |
| 18:01-19:00, Thu., 25 Dec. | 0.0367 | 0.0303 | 0.0330 |
| 17:01-18:00, Thu., 25 Dec. | 0.0334 | 0.0265 | 0.0300 |
| 16:01-17:00, Thu., 25 Dec. | 0.0314 | 0.0281 | 0.0294 |
| 15:01-16:00, Thu., 25 Dec. | 0.0327 | 0.0273 | 0.0298 |
| 14:01-15:00, Thu., 25 Dec. | 0.0316 | 0.0280 | 0.0296 |
| 13:01-14:00, Thu., 25 Dec. | 0.0326 | 0.0287 | 0.0302 |
| 12:01-13:00, Thu., 25 Dec. | 0.0321 | 0.0274 | 0.0302 |
| 11:01-12:00, Thu., 25 Dec. | 0.0323 | 0.0275 | 0.0303 |
| 10:01-11:00, Thu., 25 Dec. | 0.0315 | 0.0282 | 0.0299 |
| 09:01-10:00, Thu., 25 Dec. | 0.0320 | 0.0287 | 0.0302 |
| 08:01-09:00, Thu., 25 Dec. | 0.0323 | 0.0282 | 0.0303 |
| 07:01-08:00, Thu., 25 Dec. | 0.0329 | 0.0286 | 0.0303 |
| 06:01-07:00, Thu., 25 Dec. | 0.0334 | 0.0287 | 0.0306 |
| 05:01-06:00, Thu., 25 Dec. | 0.0326 | 0.0288 | 0.0306 |
| 04:01-05:00, Thu., 25 Dec. | 0.0331 | 0.0288 | 0.0308 |
| 03:01-04:00, Thu., 25 Dec. | 0.0328 | 0.0285 | 0.0312 |
| 02:01-03:00, Thu., 25 Dec. | 0.0332 | 0.0292 | 0.0315 |
| 01:01-02:00, Thu., 25 Dec. | 0.0341 | 0.0285 | 0.0313 |
| 00:01-01:00, Thu., 25 Dec. | 0.0316 | 0.0273 | 0.0293 |
| 23:01-24:00, Wed., 24 Dec. | 0.0306 | 0.0270 | 0.0286 |
| 22:01-23:00, Wed., 24 Dec. | 0.0304 | 0.0261 | 0.0285 |
| 21:01-22:00, Wed., 24 Dec. | 0.0304 | 0.0264 | 0.0287 |
| 20:01-21:00, Wed., 24 Dec. | 0.0330 | 0.0265 | 0.0294 |
| 19:01-20:00, Wed., 24 Dec. | 0.0329 | 0.0286 | 0.0309 |
| 18:01-19:00, Wed., 24 Dec. | 0.0334 | 0.0279 | 0.0308 |
| 17:01-18:00, Wed., 24 Dec. | 0.0332 | 0.0284 | 0.0311 |
| 16:01-17:00, Wed., 24 Dec. | 0.0380 | 0.0302 | 0.0333 |
| 15:01-16:00, Wed., 24 Dec. | 0.0456 | 0.0374 | 0.0415 |
| 14:01-15:00, Wed., 24 Dec. | 0.0526 | 0.0440 | 0.0483 |
| 13:01-14:00, Wed., 24 Dec. | 0.0584 | 0.0504 | 0.0549 |
| 12:01-13:00, Wed., 24 Dec. | 0.0601 | 0.0539 | 0.0562 |
| 11:01-12:00, Wed., 24 Dec. | 0.0576 | 0.0523 | 0.0550 |
| 10:01-11:00, Wed., 24 Dec. | 0.0559 | 0.0428 | 0.0480 |
| 09:01-10:00, Wed., 24 Dec. | 0.0452 | 0.0405 | 0.0427 |
| 08:01-09:00, Wed., 24 Dec. | 0.0471 | 0.0412 | 0.0439 |
| 07:01-08:00, Wed., 24 Dec. | 0.0490 | 0.0429 | 0.0459 |
| 06:01-07:00, Wed., 24 Dec. | 0.0481 | 0.0366 | 0.0419 |
| 05:01-06:00, Wed., 24 Dec. | 0.0395 | 0.0301 | 0.0345 |
| 04:01-05:00, Wed., 24 Dec. | 0.0325 | 0.0270 | 0.0298 |
| 03:01-04:00, Wed., 24 Dec. | 0.0318 | 0.0273 | 0.0289 |
| 02:01-03:00, Wed., 24 Dec. | 0.0320 | 0.0265 | 0.0300 |
| 01:01-02:00, Wed., 24 Dec. | 0.0355 | 0.0293 | 0.0319 |
| 00:01-01:00, Wed., 24 Dec. | 0.0304 | 0.0269 | 0.0286 |
| 23:01-24:00, Tue., 23 Dec. | 0.0303 | 0.0263 | 0.0284 |
| 22:01-23:00, Tue., 23 Dec. | 0.0297 | 0.0260 | 0.0280 |
| 21:01-22:00, Tue., 23 Dec. | 0.0306 | 0.0260 | 0.0281 |
| 20:01-21:00, Tue., 23 Dec. | 0.0299 | 0.0256 | 0.0280 |
| 19:01-20:00, Tue., 23 Dec. | 0.0301 | 0.0262 | 0.0278 |
| 18:01-19:00, Tue., 23 Dec. | 0.0303 | 0.0252 | 0.0277 |
| 17:01-18:00, Tue., 23 Dec. | 0.0306 | 0.0256 | 0.0278 |
| 16:01-17:00, Tue., 23 Dec. | 0.0300 | 0.0259 | 0.0278 |
| 15:01-16:00, Tue., 23 Dec. | 0.0293 | 0.0253 | 0.0278 |
| 14:01-15:00, Tue., 23 Dec. | 0.0307 | 0.0266 | 0.0281 |
| 13:01-14:00, Tue., 23 Dec. | 0.0307 | 0.0258 | 0.0281 |
| 12:01-13:00, Tue., 23 Dec. | 0.0302 | 0.0263 | 0.0280 |
| 11:01-12:00, Tue., 23 Dec. | 0.0293 | 0.0256 | 0.0279 |
| 10:01-11:00, Tue., 23 Dec. | 0.0307 | 0.0261 | 0.0283 |
| 09:01-10:00, Tue., 23 Dec. | 0.0311 | 0.0264 | 0.0285 |
| 08:01-09:00, Tue., 23 Dec. | 0.0308 | 0.0264 | 0.0287 |
| 07:01-08:00, Tue., 23 Dec. | 0.0322 | 0.0266 | 0.0289 |
| 06:01-07:00, Tue., 23 Dec. | 0.0307 | 0.0266 | 0.0286 |
| 05:01-06:00, Tue., 23 Dec. | 0.0312 | 0.0268 | 0.0284 |
| 04:01-05:00, Tue., 23 Dec. | 0.0308 | 0.0262 | 0.0283 |
| 03:01-04:00, Tue., 23 Dec. | 0.0304 | 0.0263 | 0.0283 |
| 02:01-03:00, Tue., 23 Dec. | 0.0301 | 0.0250 | 0.0279 |
| 01:01-02:00, Tue., 23 Dec. | 0.0308 | 0.0262 | 0.0280 |
| 00:01-01:00, Tue., 23 Dec. | 0.0303 | 0.0251 | 0.0277 |
| 23:01-24:00, Mon., 22 Dec. | 0.0304 | 0.0255 | 0.0275 |
| 22:01-23:00, Mon., 22 Dec. | 0.0297 | 0.0248 | 0.0276 |
| 21:01-22:00, Mon., 22 Dec. | 0.0295 | 0.0252 | 0.0276 |
| 20:01-21:00, Mon., 22 Dec. | 0.0298 | 0.0261 | 0.0278 |
| 19:01-20:00, Mon., 22 Dec. | 0.0298 | 0.0255 | 0.0279 |
| 18:01-19:00, Mon., 22 Dec. | 0.0297 | 0.0257 | 0.0276 |
| 17:01-18:00, Mon., 22 Dec. | 0.0298 | 0.0249 | 0.0279 |
| 16:01-17:00, Mon., 22 Dec. | 0.0298 | 0.0257 | 0.0278 |
| 15:01-16:00, Mon., 22 Dec. | 0.0297 | 0.0252 | 0.0280 |
| 14:01-15:00, Mon., 22 Dec. | 0.0308 | 0.0264 | 0.0283 |
| 13:01-14:00, Mon., 22 Dec. | 0.0304 | 0.0260 | 0.0283 |
| 12:01-13:00, Mon., 22 Dec. | 0.0314 | 0.0269 | 0.0286 |
| 11:01-12:00, Mon., 22 Dec. | 0.0303 | 0.0263 | 0.0285 |
| 10:01-11:00, Mon., 22 Dec. | 0.0306 | 0.0265 | 0.0287 |
| 09:01-10:00, Mon., 22 Dec. | 0.0304 | 0.0265 | 0.0291 |
| 08:01-09:00, Mon., 22 Dec. | 0.0319 | 0.0274 | 0.0298 |
| 07:01-08:00, Mon., 22 Dec. | 0.0337 | 0.0294 | 0.0313 |
| 06:01-07:00, Mon., 22 Dec. | 0.0355 | 0.0315 | 0.0337 |
| 05:01-06:00, Mon., 22 Dec. | 0.0368 | 0.0325 | 0.0348 |
| 04:01-05:00, Mon., 22 Dec. | 0.0423 | 0.0350 | 0.0393 |
| 03:01-04:00, Mon., 22 Dec. | 0.0385 | 0.0295 | 0.0321 |
| 02:01-03:00, Mon., 22 Dec. | 0.0321 | 0.0277 | 0.0295 |
| 01:01-02:00, Mon., 22 Dec. | 0.0316 | 0.0266 | 0.0291 |
| 00:01-01:00, Mon., 22 Dec. | 0.0323 | 0.0279 | 0.0298 |