Radiation doses in the air / Measurement results by the hour (Shinjuku)

We continuously measure radiation doses in the air (air absorbed doses per hour) at monitoring posts. Measurement results can be obtained by the minute, and we gather measurement data and then display them by the hour or by the day.

The maximum value indicates the largest value measured in each time slot (during the hour or during the day), the minimum value the smallest value measured in each time slot, and the average value is the average value for each time slot.

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
10:01-11:00, Sun., 06 Jul. 0.0386 0.0337 0.0359
09:01-10:00, Sun., 06 Jul. 0.0385 0.0331 0.0362
08:01-09:00, Sun., 06 Jul. 0.0398 0.0327 0.0360
07:01-08:00, Sun., 06 Jul. 0.0391 0.0339 0.0362
06:01-07:00, Sun., 06 Jul. 0.0401 0.0345 0.0364
05:01-06:00, Sun., 06 Jul. 0.0395 0.0348 0.0362
04:01-05:00, Sun., 06 Jul. 0.0381 0.0344 0.0360
03:01-04:00, Sun., 06 Jul. 0.0383 0.0335 0.0360
02:01-03:00, Sun., 06 Jul. 0.0384 0.0339 0.0359
01:01-02:00, Sun., 06 Jul. 0.0389 0.0338 0.0359
00:01-01:00, Sun., 06 Jul. 0.0385 0.0337 0.0360
23:01-24:00, Sat., 05 Jul. 0.0380 0.0329 0.0358
22:01-23:00, Sat., 05 Jul. 0.0393 0.0345 0.0365
21:01-22:00, Sat., 05 Jul. 0.0420 0.0356 0.0384
20:01-21:00, Sat., 05 Jul. 0.0393 0.0339 0.0362
19:01-20:00, Sat., 05 Jul. 0.0375 0.0331 0.0357
18:01-19:00, Sat., 05 Jul. 0.0394 0.0339 0.0358
17:01-18:00, Sat., 05 Jul. 0.0371 0.0333 0.0354
16:01-17:00, Sat., 05 Jul. 0.0386 0.0339 0.0360
15:01-16:00, Sat., 05 Jul. 0.0377 0.0339 0.0359
14:01-15:00, Sat., 05 Jul. 0.0389 0.0341 0.0361
13:01-14:00, Sat., 05 Jul. 0.0397 0.0341 0.0365
12:01-13:00, Sat., 05 Jul. 0.0399 0.0340 0.0363
11:01-12:00, Sat., 05 Jul. 0.0400 0.0341 0.0360
10:01-11:00, Sat., 05 Jul. 0.0383 0.0329 0.0357
09:01-10:00, Sat., 05 Jul. 0.0378 0.0330 0.0354
08:01-09:00, Sat., 05 Jul. 0.0401 0.0341 0.0360
07:01-08:00, Sat., 05 Jul. 0.0379 0.0337 0.0359
06:01-07:00, Sat., 05 Jul. 0.0393 0.0339 0.0359
05:01-06:00, Sat., 05 Jul. 0.0385 0.0336 0.0359
04:01-05:00, Sat., 05 Jul. 0.0395 0.0340 0.0358
03:01-04:00, Sat., 05 Jul. 0.0384 0.0335 0.0357
02:01-03:00, Sat., 05 Jul. 0.0372 0.0341 0.0358
01:01-02:00, Sat., 05 Jul. 0.0385 0.0339 0.0358
00:01-01:00, Sat., 05 Jul. 0.0389 0.0338 0.0357
23:01-24:00, Fri., 04 Jul. 0.0384 0.0341 0.0363
22:01-23:00, Fri., 04 Jul. 0.0444 0.0353 0.0395
21:01-22:00, Fri., 04 Jul. 0.0446 0.0371 0.0410
20:01-21:00, Fri., 04 Jul. 0.0429 0.0367 0.0404
19:01-20:00, Fri., 04 Jul. 0.0405 0.0330 0.0364
18:01-19:00, Fri., 04 Jul. 0.0415 0.0330 0.0355
17:01-18:00, Fri., 04 Jul. 0.0387 0.0326 0.0356
16:01-17:00, Fri., 04 Jul. 0.0392 0.0330 0.0353
15:01-16:00, Fri., 04 Jul. 0.0378 0.0334 0.0353
14:01-15:00, Fri., 04 Jul. 0.0396 0.0337 0.0358
13:01-14:00, Fri., 04 Jul. 0.0377 0.0332 0.0355
12:01-13:00, Fri., 04 Jul. 0.0376 0.0337 0.0354
11:01-12:00, Fri., 04 Jul. 0.0372 0.0333 0.0352
10:01-11:00, Fri., 04 Jul. 0.0384 0.0333 0.0352
09:01-10:00, Fri., 04 Jul. 0.0369 0.0330 0.0354
08:01-09:00, Fri., 04 Jul. 0.0373 0.0331 0.0354
07:01-08:00, Fri., 04 Jul. 0.0374 0.0324 0.0354
06:01-07:00, Fri., 04 Jul. 0.0376 0.0333 0.0354
05:01-06:00, Fri., 04 Jul. 0.0369 0.0336 0.0351
04:01-05:00, Fri., 04 Jul. 0.0374 0.0331 0.0351
03:01-04:00, Fri., 04 Jul. 0.0370 0.0331 0.0354
02:01-03:00, Fri., 04 Jul. 0.0381 0.0332 0.0354
01:01-02:00, Fri., 04 Jul. 0.0373 0.0329 0.0354
00:01-01:00, Fri., 04 Jul. 0.0375 0.0334 0.0354
23:01-24:00, Thu., 03 Jul. 0.0374 0.0329 0.0352
22:01-23:00, Thu., 03 Jul. 0.0375 0.0321 0.0350
21:01-22:00, Thu., 03 Jul. 0.0373 0.0335 0.0354
20:01-21:00, Thu., 03 Jul. 0.0371 0.0324 0.0351
19:01-20:00, Thu., 03 Jul. 0.0375 0.0326 0.0354
18:01-19:00, Thu., 03 Jul. 0.0383 0.0336 0.0355
17:01-18:00, Thu., 03 Jul. 0.0374 0.0327 0.0354
16:01-17:00, Thu., 03 Jul. 0.0371 0.0331 0.0351
15:01-16:00, Thu., 03 Jul. 0.0369 0.0322 0.0350
14:01-15:00, Thu., 03 Jul. 0.0389 0.0328 0.0354
13:01-14:00, Thu., 03 Jul. 0.0371 0.0328 0.0352
12:01-13:00, Thu., 03 Jul. 0.0369 0.0330 0.0353
11:01-12:00, Thu., 03 Jul. 0.0374 0.0338 0.0355
10:01-11:00, Thu., 03 Jul. 0.0381 0.0334 0.0353
09:01-10:00, Thu., 03 Jul. 0.0402 0.0331 0.0358
08:01-09:00, Thu., 03 Jul. 0.0374 0.0335 0.0354
07:01-08:00, Thu., 03 Jul. 0.0386 0.0335 0.0357
06:01-07:00, Thu., 03 Jul. 0.0375 0.0337 0.0356
05:01-06:00, Thu., 03 Jul. 0.0378 0.0336 0.0355
04:01-05:00, Thu., 03 Jul. 0.0386 0.0339 0.0356
03:01-04:00, Thu., 03 Jul. 0.0369 0.0331 0.0354
02:01-03:00, Thu., 03 Jul. 0.0376 0.0336 0.0356
01:01-02:00, Thu., 03 Jul. 0.0384 0.0333 0.0357
00:01-01:00, Thu., 03 Jul. 0.0375 0.0336 0.0356
23:01-24:00, Wed., 02 Jul. 0.0380 0.0331 0.0356
22:01-23:00, Wed., 02 Jul. 0.0372 0.0329 0.0355
21:01-22:00, Wed., 02 Jul. 0.0375 0.0329 0.0352
20:01-21:00, Wed., 02 Jul. 0.0384 0.0335 0.0355
19:01-20:00, Wed., 02 Jul. 0.0385 0.0331 0.0357
18:01-19:00, Wed., 02 Jul. 0.0373 0.0333 0.0355
17:01-18:00, Wed., 02 Jul. 0.0381 0.0331 0.0356
16:01-17:00, Wed., 02 Jul. 0.0385 0.0333 0.0356
15:01-16:00, Wed., 02 Jul. 0.0397 0.0329 0.0354
14:01-15:00, Wed., 02 Jul. 0.0378 0.0332 0.0354
13:01-14:00, Wed., 02 Jul. 0.0375 0.0330 0.0351
12:01-13:00, Wed., 02 Jul. 0.0372 0.0337 0.0353
11:01-12:00, Wed., 02 Jul. 0.0371 0.0333 0.0355
10:01-11:00, Wed., 02 Jul. 0.0382 0.0334 0.0357
09:01-10:00, Wed., 02 Jul. 0.0383 0.0337 0.0360
08:01-09:00, Wed., 02 Jul. 0.0380 0.0338 0.0360
07:01-08:00, Wed., 02 Jul. 0.0390 0.0335 0.0358
06:01-07:00, Wed., 02 Jul. 0.0389 0.0333 0.0360
05:01-06:00, Wed., 02 Jul. 0.0387 0.0336 0.0360
04:01-05:00, Wed., 02 Jul. 0.0394 0.0333 0.0358
03:01-04:00, Wed., 02 Jul. 0.0400 0.0341 0.0359
02:01-03:00, Wed., 02 Jul. 0.0392 0.0336 0.0359
01:01-02:00, Wed., 02 Jul. 0.0383 0.0332 0.0356
00:01-01:00, Wed., 02 Jul. 0.0388 0.0331 0.0358
23:01-24:00, Tue., 01 Jul. 0.0375 0.0335 0.0356
22:01-23:00, Tue., 01 Jul. 0.0388 0.0345 0.0359
21:01-22:00, Tue., 01 Jul. 0.0407 0.0338 0.0366
20:01-21:00, Tue., 01 Jul. 0.0459 0.0361 0.0403
19:01-20:00, Tue., 01 Jul. 0.0472 0.0335 0.0402
18:01-19:00, Tue., 01 Jul. 0.0383 0.0326 0.0356
17:01-18:00, Tue., 01 Jul. 0.0371 0.0337 0.0353
16:01-17:00, Tue., 01 Jul. 0.0386 0.0327 0.0354
15:01-16:00, Tue., 01 Jul. 0.0383 0.0331 0.0355
14:01-15:00, Tue., 01 Jul. 0.0376 0.0342 0.0355
13:01-14:00, Tue., 01 Jul. 0.0371 0.0333 0.0353
12:01-13:00, Tue., 01 Jul. 0.0374 0.0328 0.0355
11:01-12:00, Tue., 01 Jul. 0.0376 0.0325 0.0353
10:01-11:00, Tue., 01 Jul. 0.0383 0.0341 0.0357
09:01-10:00, Tue., 01 Jul. 0.0393 0.0320 0.0355
08:01-09:00, Tue., 01 Jul. 0.0372 0.0334 0.0354
07:01-08:00, Tue., 01 Jul. 0.0389 0.0341 0.0356
06:01-07:00, Tue., 01 Jul. 0.0375 0.0330 0.0356
05:01-06:00, Tue., 01 Jul. 0.0380 0.0330 0.0352
04:01-05:00, Tue., 01 Jul. 0.0382 0.0331 0.0353
03:01-04:00, Tue., 01 Jul. 0.0373 0.0330 0.0354
02:01-03:00, Tue., 01 Jul. 0.0372 0.0325 0.0355
01:01-02:00, Tue., 01 Jul. 0.0370 0.0332 0.0354
00:01-01:00, Tue., 01 Jul. 0.0390 0.0339 0.0356
23:01-24:00, Mon., 30 Jun. 0.0393 0.0327 0.0354
22:01-23:00, Mon., 30 Jun. 0.0371 0.0336 0.0355
21:01-22:00, Mon., 30 Jun. 0.0384 0.0334 0.0357
20:01-21:00, Mon., 30 Jun. 0.0385 0.0337 0.0356
19:01-20:00, Mon., 30 Jun. 0.0374 0.0326 0.0355
18:01-19:00, Mon., 30 Jun. 0.0385 0.0330 0.0355
17:01-18:00, Mon., 30 Jun. 0.0379 0.0333 0.0354
16:01-17:00, Mon., 30 Jun. 0.0379 0.0335 0.0353
15:01-16:00, Mon., 30 Jun. 0.0379 0.0331 0.0354
14:01-15:00, Mon., 30 Jun. 0.0369 0.0329 0.0354
13:01-14:00, Mon., 30 Jun. 0.0385 0.0327 0.0355
12:01-13:00, Mon., 30 Jun. 0.0373 0.0332 0.0355
11:01-12:00, Mon., 30 Jun. 0.0378 0.0335 0.0355
10:01-11:00, Mon., 30 Jun. 0.0373 0.0337 0.0356
09:01-10:00, Mon., 30 Jun. 0.0377 0.0330 0.0358
08:01-09:00, Mon., 30 Jun. 0.0389 0.0339 0.0358
07:01-08:00, Mon., 30 Jun. 0.0379 0.0330 0.0357
06:01-07:00, Mon., 30 Jun. 0.0375 0.0337 0.0358
05:01-06:00, Mon., 30 Jun. 0.0382 0.0341 0.0358
04:01-05:00, Mon., 30 Jun. 0.0375 0.0331 0.0358
03:01-04:00, Mon., 30 Jun. 0.0382 0.0327 0.0356
02:01-03:00, Mon., 30 Jun. 0.0395 0.0334 0.0355
01:01-02:00, Mon., 30 Jun. 0.0371 0.0330 0.0352
00:01-01:00, Mon., 30 Jun. 0.0373 0.0335 0.0353
23:01-24:00, Sun., 29 Jun. 0.0372 0.0337 0.0355
22:01-23:00, Sun., 29 Jun. 0.0375 0.0335 0.0354
21:01-22:00, Sun., 29 Jun. 0.0376 0.0331 0.0356
20:01-21:00, Sun., 29 Jun. 0.0374 0.0330 0.0352
19:01-20:00, Sun., 29 Jun. 0.0375 0.0325 0.0354
18:01-19:00, Sun., 29 Jun. 0.0377 0.0340 0.0358
17:01-18:00, Sun., 29 Jun. 0.0376 0.0332 0.0354
16:01-17:00, Sun., 29 Jun. 0.0376 0.0333 0.0356
15:01-16:00, Sun., 29 Jun. 0.0377 0.0328 0.0353
14:01-15:00, Sun., 29 Jun. 0.0371 0.0323 0.0353
13:01-14:00, Sun., 29 Jun. 0.0383 0.0335 0.0356
12:01-13:00, Sun., 29 Jun. 0.0375 0.0332 0.0355
11:01-12:00, Sun., 29 Jun. 0.0377 0.0341 0.0355
10:01-11:00, Sun., 29 Jun. 0.0375 0.0332 0.0354
09:01-10:00, Sun., 29 Jun. 0.0385 0.0339 0.0358
08:01-09:00, Sun., 29 Jun. 0.0374 0.0332 0.0355
07:01-08:00, Sun., 29 Jun. 0.0370 0.0338 0.0356
06:01-07:00, Sun., 29 Jun. 0.0376 0.0335 0.0355
05:01-06:00, Sun., 29 Jun. 0.0381 0.0332 0.0355
04:01-05:00, Sun., 29 Jun. 0.0382 0.0334 0.0354
03:01-04:00, Sun., 29 Jun. 0.0367 0.0322 0.0351
02:01-03:00, Sun., 29 Jun. 0.0380 0.0331 0.0356
01:01-02:00, Sun., 29 Jun. 0.0373 0.0333 0.0354
00:01-01:00, Sun., 29 Jun. 0.0374 0.0337 0.0355
23:01-24:00, Sat., 28 Jun. 0.0373 0.0332 0.0350
22:01-23:00, Sat., 28 Jun. 0.0367 0.0331 0.0353
21:01-22:00, Sat., 28 Jun. 0.0368 0.0334 0.0353
20:01-21:00, Sat., 28 Jun. 0.0371 0.0331 0.0354
19:01-20:00, Sat., 28 Jun. 0.0375 0.0326 0.0354
18:01-19:00, Sat., 28 Jun. 0.0370 0.0329 0.0351
17:01-18:00, Sat., 28 Jun. 0.0369 0.0328 0.0355
16:01-17:00, Sat., 28 Jun. 0.0373 0.0330 0.0354
15:01-16:00, Sat., 28 Jun. 0.0372 0.0332 0.0352
14:01-15:00, Sat., 28 Jun. 0.0381 0.0337 0.0355
13:01-14:00, Sat., 28 Jun. 0.0376 0.0333 0.0353
12:01-13:00, Sat., 28 Jun. 0.0381 0.0319 0.0350
11:01-12:00, Sat., 28 Jun. 0.0397 0.0324 0.0356
10:01-11:00, Sat., 28 Jun. 0.0374 0.0329 0.0353
09:01-10:00, Sat., 28 Jun. 0.0371 0.0336 0.0355
08:01-09:00, Sat., 28 Jun. 0.0371 0.0334 0.0354
07:01-08:00, Sat., 28 Jun. 0.0373 0.0335 0.0355
06:01-07:00, Sat., 28 Jun. 0.0381 0.0336 0.0356
05:01-06:00, Sat., 28 Jun. 0.0371 0.0322 0.0354
04:01-05:00, Sat., 28 Jun. 0.0370 0.0329 0.0353
03:01-04:00, Sat., 28 Jun. 0.0379 0.0333 0.0353
02:01-03:00, Sat., 28 Jun. 0.0370 0.0330 0.0351
01:01-02:00, Sat., 28 Jun. 0.0384 0.0329 0.0350
00:01-01:00, Sat., 28 Jun. 0.0371 0.0324 0.0347
23:01-24:00, Fri., 27 Jun. 0.0382 0.0333 0.0352
22:01-23:00, Fri., 27 Jun. 0.0370 0.0326 0.0350
21:01-22:00, Fri., 27 Jun. 0.0385 0.0339 0.0359
20:01-21:00, Fri., 27 Jun. 0.0433 0.0348 0.0389
19:01-20:00, Fri., 27 Jun. 0.0504 0.0396 0.0456
18:01-19:00, Fri., 27 Jun. 0.0457 0.0330 0.0369
17:01-18:00, Fri., 27 Jun. 0.0371 0.0330 0.0353
16:01-17:00, Fri., 27 Jun. 0.0368 0.0333 0.0353
15:01-16:00, Fri., 27 Jun. 0.0373 0.0332 0.0350
14:01-15:00, Fri., 27 Jun. 0.0367 0.0332 0.0350
13:01-14:00, Fri., 27 Jun. 0.0372 0.0328 0.0351
12:01-13:00, Fri., 27 Jun. 0.0372 0.0332 0.0351
11:01-12:00, Fri., 27 Jun. 0.0378 0.0325 0.0351
10:01-11:00, Fri., 27 Jun. 0.0381 0.0330 0.0353
09:01-10:00, Fri., 27 Jun. 0.0384 0.0331 0.0351
08:01-09:00, Fri., 27 Jun. 0.0388 0.0325 0.0356
07:01-08:00, Fri., 27 Jun. 0.0378 0.0342 0.0358
06:01-07:00, Fri., 27 Jun. 0.0385 0.0329 0.0356
05:01-06:00, Fri., 27 Jun. 0.0379 0.0334 0.0354
04:01-05:00, Fri., 27 Jun. 0.0391 0.0329 0.0351
03:01-04:00, Fri., 27 Jun. 0.0399 0.0325 0.0350
02:01-03:00, Fri., 27 Jun. 0.0364 0.0323 0.0349
01:01-02:00, Fri., 27 Jun. 0.0369 0.0334 0.0352
00:01-01:00, Fri., 27 Jun. 0.0372 0.0330 0.0356
23:01-24:00, Thu., 26 Jun. 0.0423 0.0345 0.0375
22:01-23:00, Thu., 26 Jun. 0.0423 0.0346 0.0386
21:01-22:00, Thu., 26 Jun. 0.0424 0.0360 0.0390
20:01-21:00, Thu., 26 Jun. 0.0440 0.0362 0.0398
19:01-20:00, Thu., 26 Jun. 0.0449 0.0366 0.0399
18:01-19:00, Thu., 26 Jun. 0.0417 0.0331 0.0370
17:01-18:00, Thu., 26 Jun. 0.0369 0.0312 0.0347
16:01-17:00, Thu., 26 Jun. 0.0361 0.0321 0.0345
15:01-16:00, Thu., 26 Jun. 0.0366 0.0324 0.0345
14:01-15:00, Thu., 26 Jun. 0.0368 0.0322 0.0347
13:01-14:00, Thu., 26 Jun. 0.0368 0.0325 0.0346
12:01-13:00, Thu., 26 Jun. 0.0368 0.0322 0.0346
11:01-12:00, Thu., 26 Jun. 0.0369 0.0316 0.0345