Measurement results by the hour (Shinjuku) 20 Apr., 2026 - 26 Apr., 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., 26 Apr. | 0.0374 | 0.0331 | 0.0353 |
| 22:01-23:00, Sun., 26 Apr. | 0.0380 | 0.0336 | 0.0357 |
| 21:01-22:00, Sun., 26 Apr. | 0.0373 | 0.0333 | 0.0357 |
| 20:01-21:00, Sun., 26 Apr. | 0.0382 | 0.0332 | 0.0355 |
| 19:01-20:00, Sun., 26 Apr. | 0.0395 | 0.0336 | 0.0357 |
| 18:01-19:00, Sun., 26 Apr. | 0.0397 | 0.0322 | 0.0355 |
| 17:01-18:00, Sun., 26 Apr. | 0.0373 | 0.0343 | 0.0357 |
| 16:01-17:00, Sun., 26 Apr. | 0.0373 | 0.0336 | 0.0356 |
| 15:01-16:00, Sun., 26 Apr. | 0.0389 | 0.0341 | 0.0356 |
| 14:01-15:00, Sun., 26 Apr. | 0.0374 | 0.0341 | 0.0357 |
| 13:01-14:00, Sun., 26 Apr. | 0.0380 | 0.0337 | 0.0356 |
| 12:01-13:00, Sun., 26 Apr. | 0.0384 | 0.0336 | 0.0357 |
| 11:01-12:00, Sun., 26 Apr. | 0.0408 | 0.0328 | 0.0354 |
| 10:01-11:00, Sun., 26 Apr. | 0.0384 | 0.0344 | 0.0359 |
| 09:01-10:00, Sun., 26 Apr. | 0.0402 | 0.0335 | 0.0359 |
| 08:01-09:00, Sun., 26 Apr. | 0.0378 | 0.0344 | 0.0361 |
| 07:01-08:00, Sun., 26 Apr. | 0.0389 | 0.0342 | 0.0361 |
| 06:01-07:00, Sun., 26 Apr. | 0.0390 | 0.0337 | 0.0361 |
| 05:01-06:00, Sun., 26 Apr. | 0.0383 | 0.0340 | 0.0360 |
| 04:01-05:00, Sun., 26 Apr. | 0.0375 | 0.0328 | 0.0356 |
| 03:01-04:00, Sun., 26 Apr. | 0.0367 | 0.0332 | 0.0353 |
| 02:01-03:00, Sun., 26 Apr. | 0.0377 | 0.0336 | 0.0355 |
| 01:01-02:00, Sun., 26 Apr. | 0.0385 | 0.0331 | 0.0355 |
| 00:01-01:00, Sun., 26 Apr. | 0.0385 | 0.0334 | 0.0358 |
| 23:01-24:00, Sat., 25 Apr. | 0.0378 | 0.0333 | 0.0357 |
| 22:01-23:00, Sat., 25 Apr. | 0.0368 | 0.0330 | 0.0355 |
| 21:01-22:00, Sat., 25 Apr. | 0.0373 | 0.0339 | 0.0353 |
| 20:01-21:00, Sat., 25 Apr. | 0.0388 | 0.0333 | 0.0354 |
| 19:01-20:00, Sat., 25 Apr. | 0.0394 | 0.0336 | 0.0356 |
| 18:01-19:00, Sat., 25 Apr. | 0.0374 | 0.0334 | 0.0354 |
| 17:01-18:00, Sat., 25 Apr. | 0.0378 | 0.0325 | 0.0357 |
| 16:01-17:00, Sat., 25 Apr. | 0.0395 | 0.0339 | 0.0359 |
| 15:01-16:00, Sat., 25 Apr. | 0.0393 | 0.0333 | 0.0358 |
| 14:01-15:00, Sat., 25 Apr. | 0.0380 | 0.0342 | 0.0359 |
| 13:01-14:00, Sat., 25 Apr. | 0.0383 | 0.0339 | 0.0357 |
| 12:01-13:00, Sat., 25 Apr. | 0.0404 | 0.0336 | 0.0357 |
| 11:01-12:00, Sat., 25 Apr. | 0.0381 | 0.0337 | 0.0355 |
| 10:01-11:00, Sat., 25 Apr. | 0.0372 | 0.0334 | 0.0355 |
| 09:01-10:00, Sat., 25 Apr. | 0.0390 | 0.0331 | 0.0358 |
| 08:01-09:00, Sat., 25 Apr. | 0.0374 | 0.0332 | 0.0356 |
| 07:01-08:00, Sat., 25 Apr. | 0.0381 | 0.0332 | 0.0356 |
| 06:01-07:00, Sat., 25 Apr. | 0.0372 | 0.0335 | 0.0355 |
| 05:01-06:00, Sat., 25 Apr. | 0.0394 | 0.0333 | 0.0356 |
| 04:01-05:00, Sat., 25 Apr. | 0.0392 | 0.0337 | 0.0356 |
| 03:01-04:00, Sat., 25 Apr. | 0.0385 | 0.0332 | 0.0357 |
| 02:01-03:00, Sat., 25 Apr. | 0.0373 | 0.0334 | 0.0356 |
| 01:01-02:00, Sat., 25 Apr. | 0.0375 | 0.0339 | 0.0355 |
| 00:01-01:00, Sat., 25 Apr. | 0.0380 | 0.0339 | 0.0357 |
| 23:01-24:00, Fri., 24 Apr. | 0.0382 | 0.0332 | 0.0354 |
| 22:01-23:00, Fri., 24 Apr. | 0.0390 | 0.0323 | 0.0356 |
| 21:01-22:00, Fri., 24 Apr. | 0.0377 | 0.0331 | 0.0354 |
| 20:01-21:00, Fri., 24 Apr. | 0.0393 | 0.0340 | 0.0357 |
| 19:01-20:00, Fri., 24 Apr. | 0.0378 | 0.0339 | 0.0356 |
| 18:01-19:00, Fri., 24 Apr. | 0.0374 | 0.0336 | 0.0356 |
| 17:01-18:00, Fri., 24 Apr. | 0.0389 | 0.0336 | 0.0356 |
| 16:01-17:00, Fri., 24 Apr. | 0.0381 | 0.0330 | 0.0354 |
| 15:01-16:00, Fri., 24 Apr. | 0.0373 | 0.0339 | 0.0357 |
| 14:01-15:00, Fri., 24 Apr. | 0.0378 | 0.0336 | 0.0358 |
| 13:01-14:00, Fri., 24 Apr. | 0.0386 | 0.0345 | 0.0360 |
| 12:01-13:00, Fri., 24 Apr. | 0.0387 | 0.0334 | 0.0359 |
| 11:01-12:00, Fri., 24 Apr. | 0.0381 | 0.0343 | 0.0358 |
| 10:01-11:00, Fri., 24 Apr. | 0.0380 | 0.0339 | 0.0356 |
| 09:01-10:00, Fri., 24 Apr. | 0.0372 | 0.0337 | 0.0354 |
| 08:01-09:00, Fri., 24 Apr. | 0.0375 | 0.0339 | 0.0357 |
| 07:01-08:00, Fri., 24 Apr. | 0.0394 | 0.0334 | 0.0360 |
| 06:01-07:00, Fri., 24 Apr. | 0.0398 | 0.0339 | 0.0363 |
| 05:01-06:00, Fri., 24 Apr. | 0.0382 | 0.0341 | 0.0361 |
| 04:01-05:00, Fri., 24 Apr. | 0.0398 | 0.0342 | 0.0363 |
| 03:01-04:00, Fri., 24 Apr. | 0.0411 | 0.0340 | 0.0363 |
| 02:01-03:00, Fri., 24 Apr. | 0.0424 | 0.0355 | 0.0384 |
| 01:01-02:00, Fri., 24 Apr. | 0.0461 | 0.0366 | 0.0420 |
| 00:01-01:00, Fri., 24 Apr. | 0.0473 | 0.0387 | 0.0429 |
| 23:01-24:00, Thu., 23 Apr. | 0.0497 | 0.0417 | 0.0458 |
| 22:01-23:00, Thu., 23 Apr. | 0.0499 | 0.0425 | 0.0466 |
| 21:01-22:00, Thu., 23 Apr. | 0.0511 | 0.0409 | 0.0461 |
| 20:01-21:00, Thu., 23 Apr. | 0.0485 | 0.0412 | 0.0444 |
| 19:01-20:00, Thu., 23 Apr. | 0.0487 | 0.0406 | 0.0450 |
| 18:01-19:00, Thu., 23 Apr. | 0.0487 | 0.0429 | 0.0457 |
| 17:01-18:00, Thu., 23 Apr. | 0.0476 | 0.0388 | 0.0442 |
| 16:01-17:00, Thu., 23 Apr. | 0.0467 | 0.0394 | 0.0431 |
| 15:01-16:00, Thu., 23 Apr. | 0.0468 | 0.0399 | 0.0428 |
| 14:01-15:00, Thu., 23 Apr. | 0.0472 | 0.0399 | 0.0435 |
| 13:01-14:00, Thu., 23 Apr. | 0.0470 | 0.0406 | 0.0436 |
| 12:01-13:00, Thu., 23 Apr. | 0.0469 | 0.0393 | 0.0433 |
| 11:01-12:00, Thu., 23 Apr. | 0.0444 | 0.0360 | 0.0408 |
| 10:01-11:00, Thu., 23 Apr. | 0.0391 | 0.0346 | 0.0364 |
| 09:01-10:00, Thu., 23 Apr. | 0.0407 | 0.0349 | 0.0367 |
| 08:01-09:00, Thu., 23 Apr. | 0.0393 | 0.0349 | 0.0368 |
| 07:01-08:00, Thu., 23 Apr. | 0.0399 | 0.0352 | 0.0366 |
| 06:01-07:00, Thu., 23 Apr. | 0.0397 | 0.0343 | 0.0367 |
| 05:01-06:00, Thu., 23 Apr. | 0.0381 | 0.0342 | 0.0363 |
| 04:01-05:00, Thu., 23 Apr. | 0.0400 | 0.0343 | 0.0364 |
| 03:01-04:00, Thu., 23 Apr. | 0.0386 | 0.0346 | 0.0362 |
| 02:01-03:00, Thu., 23 Apr. | 0.0394 | 0.0344 | 0.0363 |
| 01:01-02:00, Thu., 23 Apr. | 0.0389 | 0.0348 | 0.0363 |
| 00:01-01:00, Thu., 23 Apr. | 0.0398 | 0.0330 | 0.0362 |
| 23:01-24:00, Wed., 22 Apr. | 0.0393 | 0.0337 | 0.0360 |
| 22:01-23:00, Wed., 22 Apr. | 0.0384 | 0.0341 | 0.0360 |
| 21:01-22:00, Wed., 22 Apr. | 0.0391 | 0.0331 | 0.0361 |
| 20:01-21:00, Wed., 22 Apr. | 0.0399 | 0.0339 | 0.0359 |
| 19:01-20:00, Wed., 22 Apr. | 0.0380 | 0.0337 | 0.0359 |
| 18:01-19:00, Wed., 22 Apr. | 0.0378 | 0.0343 | 0.0362 |
| 17:01-18:00, Wed., 22 Apr. | 0.0389 | 0.0338 | 0.0359 |
| 16:01-17:00, Wed., 22 Apr. | 0.0388 | 0.0339 | 0.0359 |
| 15:01-16:00, Wed., 22 Apr. | 0.0389 | 0.0339 | 0.0361 |
| 14:01-15:00, Wed., 22 Apr. | 0.0388 | 0.0340 | 0.0358 |
| 13:01-14:00, Wed., 22 Apr. | 0.0379 | 0.0337 | 0.0358 |
| 12:01-13:00, Wed., 22 Apr. | 0.0389 | 0.0341 | 0.0362 |
| 11:01-12:00, Wed., 22 Apr. | 0.0387 | 0.0333 | 0.0359 |
| 10:01-11:00, Wed., 22 Apr. | 0.0374 | 0.0336 | 0.0360 |
| 09:01-10:00, Wed., 22 Apr. | 0.0384 | 0.0334 | 0.0360 |
| 08:01-09:00, Wed., 22 Apr. | 0.0386 | 0.0341 | 0.0361 |
| 07:01-08:00, Wed., 22 Apr. | 0.0397 | 0.0335 | 0.0362 |
| 06:01-07:00, Wed., 22 Apr. | 0.0391 | 0.0342 | 0.0361 |
| 05:01-06:00, Wed., 22 Apr. | 0.0380 | 0.0343 | 0.0360 |
| 04:01-05:00, Wed., 22 Apr. | 0.0386 | 0.0340 | 0.0358 |
| 03:01-04:00, Wed., 22 Apr. | 0.0384 | 0.0343 | 0.0359 |
| 02:01-03:00, Wed., 22 Apr. | 0.0394 | 0.0344 | 0.0361 |
| 01:01-02:00, Wed., 22 Apr. | 0.0394 | 0.0339 | 0.0361 |
| 00:01-01:00, Wed., 22 Apr. | 0.0375 | 0.0336 | 0.0358 |
| 23:01-24:00, Tue., 21 Apr. | 0.0390 | 0.0336 | 0.0358 |
| 22:01-23:00, Tue., 21 Apr. | 0.0389 | 0.0338 | 0.0360 |
| 21:01-22:00, Tue., 21 Apr. | 0.0385 | 0.0342 | 0.0360 |
| 20:01-21:00, Tue., 21 Apr. | 0.0388 | 0.0339 | 0.0359 |
| 19:01-20:00, Tue., 21 Apr. | 0.0385 | 0.0339 | 0.0360 |
| 18:01-19:00, Tue., 21 Apr. | 0.0393 | 0.0343 | 0.0362 |
| 17:01-18:00, Tue., 21 Apr. | 0.0408 | 0.0337 | 0.0361 |
| 16:01-17:00, Tue., 21 Apr. | 0.0389 | 0.0341 | 0.0360 |
| 15:01-16:00, Tue., 21 Apr. | 0.0382 | 0.0339 | 0.0360 |
| 14:01-15:00, Tue., 21 Apr. | 0.0393 | 0.0342 | 0.0365 |
| 13:01-14:00, Tue., 21 Apr. | 0.0376 | 0.0347 | 0.0361 |
| 12:01-13:00, Tue., 21 Apr. | 0.0391 | 0.0340 | 0.0362 |
| 11:01-12:00, Tue., 21 Apr. | 0.0393 | 0.0349 | 0.0366 |
| 10:01-11:00, Tue., 21 Apr. | 0.0400 | 0.0341 | 0.0359 |
| 09:01-10:00, Tue., 21 Apr. | 0.0395 | 0.0338 | 0.0361 |
| 08:01-09:00, Tue., 21 Apr. | 0.0390 | 0.0331 | 0.0357 |
| 07:01-08:00, Tue., 21 Apr. | 0.0397 | 0.0331 | 0.0356 |
| 06:01-07:00, Tue., 21 Apr. | 0.0391 | 0.0322 | 0.0359 |
| 05:01-06:00, Tue., 21 Apr. | 0.0387 | 0.0335 | 0.0357 |
| 04:01-05:00, Tue., 21 Apr. | 0.0385 | 0.0336 | 0.0360 |
| 03:01-04:00, Tue., 21 Apr. | 0.0397 | 0.0332 | 0.0359 |
| 02:01-03:00, Tue., 21 Apr. | 0.0376 | 0.0341 | 0.0360 |
| 01:01-02:00, Tue., 21 Apr. | 0.0384 | 0.0345 | 0.0361 |
| 00:01-01:00, Tue., 21 Apr. | 0.0395 | 0.0331 | 0.0359 |
| 23:01-24:00, Mon., 20 Apr. | 0.0396 | 0.0338 | 0.0362 |
| 22:01-23:00, Mon., 20 Apr. | 0.0385 | 0.0342 | 0.0359 |
| 21:01-22:00, Mon., 20 Apr. | 0.0388 | 0.0331 | 0.0357 |
| 20:01-21:00, Mon., 20 Apr. | 0.0382 | 0.0340 | 0.0359 |
| 19:01-20:00, Mon., 20 Apr. | 0.0387 | 0.0337 | 0.0360 |
| 18:01-19:00, Mon., 20 Apr. | 0.0379 | 0.0338 | 0.0359 |
| 17:01-18:00, Mon., 20 Apr. | 0.0374 | 0.0330 | 0.0357 |
| 16:01-17:00, Mon., 20 Apr. | 0.0394 | 0.0337 | 0.0357 |
| 15:01-16:00, Mon., 20 Apr. | 0.0377 | 0.0333 | 0.0358 |
| 14:01-15:00, Mon., 20 Apr. | 0.0379 | 0.0335 | 0.0358 |
| 13:01-14:00, Mon., 20 Apr. | 0.0382 | 0.0336 | 0.0357 |
| 12:01-13:00, Mon., 20 Apr. | 0.0383 | 0.0343 | 0.0359 |
| 11:01-12:00, Mon., 20 Apr. | 0.0385 | 0.0330 | 0.0358 |
| 10:01-11:00, Mon., 20 Apr. | 0.0391 | 0.0342 | 0.0360 |
| 09:01-10:00, Mon., 20 Apr. | 0.0388 | 0.0341 | 0.0360 |
| 08:01-09:00, Mon., 20 Apr. | 0.0382 | 0.0331 | 0.0361 |
| 07:01-08:00, Mon., 20 Apr. | 0.0383 | 0.0345 | 0.0362 |
| 06:01-07:00, Mon., 20 Apr. | 0.0396 | 0.0321 | 0.0362 |
| 05:01-06:00, Mon., 20 Apr. | 0.0413 | 0.0332 | 0.0362 |
| 04:01-05:00, Mon., 20 Apr. | 0.0379 | 0.0340 | 0.0358 |
| 03:01-04:00, Mon., 20 Apr. | 0.0377 | 0.0342 | 0.0361 |
| 02:01-03:00, Mon., 20 Apr. | 0.0392 | 0.0343 | 0.0360 |
| 01:01-02:00, Mon., 20 Apr. | 0.0382 | 0.0340 | 0.0359 |
| 00:01-01:00, Mon., 20 Apr. | 0.0381 | 0.0341 | 0.0362 |