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
14:01-15:00, Mon., 01 Jun. 0.0396 0.0346 0.0365
13:01-14:00, Mon., 01 Jun. 0.0391 0.0343 0.0364
12:01-13:00, Mon., 01 Jun. 0.0395 0.0339 0.0368
11:01-12:00, Mon., 01 Jun. 0.0391 0.0346 0.0366
10:01-11:00, Mon., 01 Jun. 0.0401 0.0338 0.0367
09:01-10:00, Mon., 01 Jun. 0.0404 0.0350 0.0366
08:01-09:00, Mon., 01 Jun. 0.0394 0.0338 0.0367
07:01-08:00, Mon., 01 Jun. 0.0406 0.0345 0.0370
06:01-07:00, Mon., 01 Jun. 0.0393 0.0347 0.0366
05:01-06:00, Mon., 01 Jun. 0.0407 0.0346 0.0368
04:01-05:00, Mon., 01 Jun. 0.0405 0.0349 0.0368
03:01-04:00, Mon., 01 Jun. 0.0392 0.0347 0.0365
02:01-03:00, Mon., 01 Jun. 0.0389 0.0335 0.0364
01:01-02:00, Mon., 01 Jun. 0.0397 0.0345 0.0365
00:01-01:00, Mon., 01 Jun. 0.0399 0.0351 0.0367
23:01-24:00, Sun., 31 May. 0.0389 0.0332 0.0362
22:01-23:00, Sun., 31 May. 0.0390 0.0333 0.0363
21:01-22:00, Sun., 31 May. 0.0391 0.0346 0.0366
20:01-21:00, Sun., 31 May. 0.0392 0.0347 0.0367
19:01-20:00, Sun., 31 May. 0.0394 0.0347 0.0365
18:01-19:00, Sun., 31 May. 0.0395 0.0340 0.0363
17:01-18:00, Sun., 31 May. 0.0398 0.0342 0.0365
16:01-17:00, Sun., 31 May. 0.0403 0.0329 0.0364
15:01-16:00, Sun., 31 May. 0.0398 0.0347 0.0365
14:01-15:00, Sun., 31 May. 0.0389 0.0340 0.0362
13:01-14:00, Sun., 31 May. 0.0379 0.0339 0.0362
12:01-13:00, Sun., 31 May. 0.0392 0.0348 0.0366
11:01-12:00, Sun., 31 May. 0.0397 0.0349 0.0368
10:01-11:00, Sun., 31 May. 0.0397 0.0355 0.0368
09:01-10:00, Sun., 31 May. 0.0412 0.0347 0.0374
08:01-09:00, Sun., 31 May. 0.0407 0.0351 0.0369
07:01-08:00, Sun., 31 May. 0.0409 0.0338 0.0369
06:01-07:00, Sun., 31 May. 0.0396 0.0346 0.0369
05:01-06:00, Sun., 31 May. 0.0396 0.0342 0.0364
04:01-05:00, Sun., 31 May. 0.0398 0.0337 0.0364
03:01-04:00, Sun., 31 May. 0.0393 0.0343 0.0363
02:01-03:00, Sun., 31 May. 0.0414 0.0334 0.0363
01:01-02:00, Sun., 31 May. 0.0388 0.0335 0.0365
00:01-01:00, Sun., 31 May. 0.0399 0.0341 0.0362
23:01-24:00, Sat., 30 May. 0.0386 0.0339 0.0363
22:01-23:00, Sat., 30 May. 0.0401 0.0345 0.0364
21:01-22:00, Sat., 30 May. 0.0385 0.0340 0.0361
20:01-21:00, Sat., 30 May. 0.0388 0.0339 0.0363
19:01-20:00, Sat., 30 May. 0.0388 0.0346 0.0362
18:01-19:00, Sat., 30 May. 0.0394 0.0344 0.0363
17:01-18:00, Sat., 30 May. 0.0413 0.0348 0.0366
16:01-17:00, Sat., 30 May. 0.0397 0.0341 0.0365
15:01-16:00, Sat., 30 May. 0.0394 0.0341 0.0362
14:01-15:00, Sat., 30 May. 0.0392 0.0336 0.0363
13:01-14:00, Sat., 30 May. 0.0390 0.0337 0.0362
12:01-13:00, Sat., 30 May. 0.0395 0.0333 0.0363
11:01-12:00, Sat., 30 May. 0.0382 0.0340 0.0362
10:01-11:00, Sat., 30 May. 0.0400 0.0339 0.0362
09:01-10:00, Sat., 30 May. 0.0382 0.0336 0.0364
08:01-09:00, Sat., 30 May. 0.0413 0.0343 0.0364
07:01-08:00, Sat., 30 May. 0.0398 0.0339 0.0363
06:01-07:00, Sat., 30 May. 0.0387 0.0345 0.0364
05:01-06:00, Sat., 30 May. 0.0395 0.0343 0.0365
04:01-05:00, Sat., 30 May. 0.0401 0.0346 0.0365
03:01-04:00, Sat., 30 May. 0.0390 0.0335 0.0365
02:01-03:00, Sat., 30 May. 0.0396 0.0338 0.0366
01:01-02:00, Sat., 30 May. 0.0396 0.0350 0.0366
00:01-01:00, Sat., 30 May. 0.0417 0.0342 0.0364
23:01-24:00, Fri., 29 May. 0.0401 0.0345 0.0366
22:01-23:00, Fri., 29 May. 0.0399 0.0342 0.0363
21:01-22:00, Fri., 29 May. 0.0395 0.0344 0.0365
20:01-21:00, Fri., 29 May. 0.0401 0.0337 0.0365
19:01-20:00, Fri., 29 May. 0.0391 0.0346 0.0360
18:01-19:00, Fri., 29 May. 0.0381 0.0343 0.0363
17:01-18:00, Fri., 29 May. 0.0387 0.0341 0.0363
16:01-17:00, Fri., 29 May. 0.0396 0.0341 0.0363
15:01-16:00, Fri., 29 May. 0.0388 0.0346 0.0364
14:01-15:00, Fri., 29 May. 0.0397 0.0347 0.0367
13:01-14:00, Fri., 29 May. 0.0400 0.0343 0.0365
12:01-13:00, Fri., 29 May. 0.0413 0.0342 0.0365
11:01-12:00, Fri., 29 May. 0.0400 0.0344 0.0363
10:01-11:00, Fri., 29 May. 0.0395 0.0347 0.0367
09:01-10:00, Fri., 29 May. 0.0393 0.0347 0.0364
08:01-09:00, Fri., 29 May. 0.0401 0.0346 0.0366
07:01-08:00, Fri., 29 May. 0.0406 0.0344 0.0368
06:01-07:00, Fri., 29 May. 0.0405 0.0348 0.0367
05:01-06:00, Fri., 29 May. 0.0386 0.0344 0.0362
04:01-05:00, Fri., 29 May. 0.0390 0.0333 0.0363
03:01-04:00, Fri., 29 May. 0.0397 0.0332 0.0361
02:01-03:00, Fri., 29 May. 0.0399 0.0340 0.0361
01:01-02:00, Fri., 29 May. 0.0382 0.0335 0.0360
00:01-01:00, Fri., 29 May. 0.0386 0.0335 0.0361
23:01-24:00, Thu., 28 May. 0.0389 0.0338 0.0360
22:01-23:00, Thu., 28 May. 0.0393 0.0342 0.0361
21:01-22:00, Thu., 28 May. 0.0385 0.0334 0.0360
20:01-21:00, Thu., 28 May. 0.0390 0.0343 0.0360
19:01-20:00, Thu., 28 May. 0.0384 0.0330 0.0357
18:01-19:00, Thu., 28 May. 0.0377 0.0343 0.0359
17:01-18:00, Thu., 28 May. 0.0397 0.0344 0.0363
16:01-17:00, Thu., 28 May. 0.0379 0.0334 0.0361
15:01-16:00, Thu., 28 May. 0.0386 0.0339 0.0359
14:01-15:00, Thu., 28 May. 0.0386 0.0338 0.0358
13:01-14:00, Thu., 28 May. 0.0385 0.0340 0.0359
12:01-13:00, Thu., 28 May. 0.0377 0.0335 0.0356
11:01-12:00, Thu., 28 May. 0.0404 0.0344 0.0359
10:01-11:00, Thu., 28 May. 0.0382 0.0336 0.0359
09:01-10:00, Thu., 28 May. 0.0395 0.0335 0.0359
08:01-09:00, Thu., 28 May. 0.0391 0.0340 0.0357
07:01-08:00, Thu., 28 May. 0.0379 0.0332 0.0357
06:01-07:00, Thu., 28 May. 0.0395 0.0330 0.0358
05:01-06:00, Thu., 28 May. 0.0389 0.0331 0.0357
04:01-05:00, Thu., 28 May. 0.0385 0.0337 0.0356
03:01-04:00, Thu., 28 May. 0.0391 0.0340 0.0356
02:01-03:00, Thu., 28 May. 0.0391 0.0339 0.0357
01:01-02:00, Thu., 28 May. 0.0394 0.0340 0.0359
00:01-01:00, Thu., 28 May. 0.0382 0.0342 0.0358
23:01-24:00, Wed., 27 May. 0.0373 0.0337 0.0355
22:01-23:00, Wed., 27 May. 0.0373 0.0345 0.0359
21:01-22:00, Wed., 27 May. 0.0385 0.0336 0.0357
20:01-21:00, Wed., 27 May. 0.0375 0.0338 0.0357
19:01-20:00, Wed., 27 May. 0.0374 0.0342 0.0357
18:01-19:00, Wed., 27 May. 0.0393 0.0342 0.0360
17:01-18:00, Wed., 27 May. 0.0401 0.0337 0.0358
16:01-17:00, Wed., 27 May. 0.0391 0.0332 0.0358
15:01-16:00, Wed., 27 May. 0.0393 0.0338 0.0358
14:01-15:00, Wed., 27 May. 0.0384 0.0332 0.0356
13:01-14:00, Wed., 27 May. 0.0387 0.0332 0.0358
12:01-13:00, Wed., 27 May. 0.0396 0.0333 0.0360
11:01-12:00, Wed., 27 May. 0.0379 0.0330 0.0357
10:01-11:00, Wed., 27 May. 0.0383 0.0337 0.0357
09:01-10:00, Wed., 27 May. 0.0394 0.0333 0.0356
08:01-09:00, Wed., 27 May. 0.0379 0.0336 0.0357
07:01-08:00, Wed., 27 May. 0.0389 0.0334 0.0357
06:01-07:00, Wed., 27 May. 0.0384 0.0337 0.0355
05:01-06:00, Wed., 27 May. 0.0394 0.0341 0.0360
04:01-05:00, Wed., 27 May. 0.0378 0.0337 0.0360
03:01-04:00, Wed., 27 May. 0.0386 0.0342 0.0359
02:01-03:00, Wed., 27 May. 0.0388 0.0339 0.0358
01:01-02:00, Wed., 27 May. 0.0383 0.0333 0.0355
00:01-01:00, Wed., 27 May. 0.0375 0.0335 0.0356
23:01-24:00, Tue., 26 May. 0.0386 0.0330 0.0356
22:01-23:00, Tue., 26 May. 0.0390 0.0338 0.0359
21:01-22:00, Tue., 26 May. 0.0374 0.0330 0.0355
20:01-21:00, Tue., 26 May. 0.0399 0.0331 0.0357
19:01-20:00, Tue., 26 May. 0.0385 0.0324 0.0354
18:01-19:00, Tue., 26 May. 0.0390 0.0336 0.0358
17:01-18:00, Tue., 26 May. 0.0384 0.0331 0.0357
16:01-17:00, Tue., 26 May. 0.0385 0.0335 0.0357
15:01-16:00, Tue., 26 May. 0.0378 0.0333 0.0358
14:01-15:00, Tue., 26 May. 0.0382 0.0340 0.0357
13:01-14:00, Tue., 26 May. 0.0380 0.0338 0.0355
12:01-13:00, Tue., 26 May. 0.0395 0.0334 0.0357
11:01-12:00, Tue., 26 May. 0.0378 0.0337 0.0356
10:01-11:00, Tue., 26 May. 0.0372 0.0326 0.0355
09:01-10:00, Tue., 26 May. 0.0389 0.0335 0.0358
08:01-09:00, Tue., 26 May. 0.0382 0.0331 0.0355
07:01-08:00, Tue., 26 May. 0.0377 0.0339 0.0354
06:01-07:00, Tue., 26 May. 0.0385 0.0332 0.0357
05:01-06:00, Tue., 26 May. 0.0374 0.0334 0.0355
04:01-05:00, Tue., 26 May. 0.0412 0.0335 0.0357
03:01-04:00, Tue., 26 May. 0.0386 0.0338 0.0358
02:01-03:00, Tue., 26 May. 0.0371 0.0333 0.0355
01:01-02:00, Tue., 26 May. 0.0393 0.0334 0.0357
00:01-01:00, Tue., 26 May. 0.0382 0.0340 0.0358
23:01-24:00, Mon., 25 May. 0.0381 0.0338 0.0357
22:01-23:00, Mon., 25 May. 0.0382 0.0335 0.0356
21:01-22:00, Mon., 25 May. 0.0379 0.0333 0.0355
20:01-21:00, Mon., 25 May. 0.0385 0.0340 0.0355
19:01-20:00, Mon., 25 May. 0.0386 0.0333 0.0355
18:01-19:00, Mon., 25 May. 0.0403 0.0336 0.0357
17:01-18:00, Mon., 25 May. 0.0379 0.0336 0.0357
16:01-17:00, Mon., 25 May. 0.0387 0.0342 0.0356
15:01-16:00, Mon., 25 May. 0.0387 0.0340 0.0358
14:01-15:00, Mon., 25 May. 0.0394 0.0319 0.0352
13:01-14:00, Mon., 25 May. 0.0391 0.0332 0.0356
12:01-13:00, Mon., 25 May. 0.0372 0.0325 0.0352
11:01-12:00, Mon., 25 May. 0.0375 0.0317 0.0354
10:01-11:00, Mon., 25 May. 0.0372 0.0337 0.0357
09:01-10:00, Mon., 25 May. 0.0397 0.0338 0.0359
08:01-09:00, Mon., 25 May. 0.0379 0.0336 0.0358
07:01-08:00, Mon., 25 May. 0.0396 0.0340 0.0361
06:01-07:00, Mon., 25 May. 0.0377 0.0333 0.0362
05:01-06:00, Mon., 25 May. 0.0391 0.0334 0.0357
04:01-05:00, Mon., 25 May. 0.0373 0.0334 0.0355
03:01-04:00, Mon., 25 May. 0.0381 0.0337 0.0356
02:01-03:00, Mon., 25 May. 0.0371 0.0332 0.0354
01:01-02:00, Mon., 25 May. 0.0395 0.0334 0.0355
00:01-01:00, Mon., 25 May. 0.0379 0.0322 0.0354
23:01-24:00, Sun., 24 May. 0.0371 0.0342 0.0357
22:01-23:00, Sun., 24 May. 0.0395 0.0334 0.0355
21:01-22:00, Sun., 24 May. 0.0372 0.0332 0.0356
20:01-21:00, Sun., 24 May. 0.0384 0.0335 0.0356
19:01-20:00, Sun., 24 May. 0.0377 0.0342 0.0357
18:01-19:00, Sun., 24 May. 0.0376 0.0341 0.0356
17:01-18:00, Sun., 24 May. 0.0374 0.0331 0.0354
16:01-17:00, Sun., 24 May. 0.0398 0.0338 0.0357
15:01-16:00, Sun., 24 May. 0.0376 0.0338 0.0357
14:01-15:00, Sun., 24 May. 0.0378 0.0325 0.0357
13:01-14:00, Sun., 24 May. 0.0391 0.0336 0.0356
12:01-13:00, Sun., 24 May. 0.0381 0.0334 0.0356
11:01-12:00, Sun., 24 May. 0.0375 0.0326 0.0357
10:01-11:00, Sun., 24 May. 0.0374 0.0332 0.0358
09:01-10:00, Sun., 24 May. 0.0377 0.0326 0.0355
08:01-09:00, Sun., 24 May. 0.0380 0.0318 0.0353
07:01-08:00, Sun., 24 May. 0.0370 0.0340 0.0355
06:01-07:00, Sun., 24 May. 0.0370 0.0337 0.0353
05:01-06:00, Sun., 24 May. 0.0370 0.0338 0.0354
04:01-05:00, Sun., 24 May. 0.0382 0.0338 0.0354
03:01-04:00, Sun., 24 May. 0.0370 0.0328 0.0353
02:01-03:00, Sun., 24 May. 0.0382 0.0334 0.0356
01:01-02:00, Sun., 24 May. 0.0393 0.0341 0.0357
00:01-01:00, Sun., 24 May. 0.0386 0.0332 0.0359
23:01-24:00, Sat., 23 May. 0.0372 0.0332 0.0353
22:01-23:00, Sat., 23 May. 0.0375 0.0330 0.0354
21:01-22:00, Sat., 23 May. 0.0388 0.0334 0.0354
20:01-21:00, Sat., 23 May. 0.0375 0.0334 0.0354
19:01-20:00, Sat., 23 May. 0.0373 0.0333 0.0352
18:01-19:00, Sat., 23 May. 0.0373 0.0330 0.0353
17:01-18:00, Sat., 23 May. 0.0384 0.0333 0.0356
16:01-17:00, Sat., 23 May. 0.0370 0.0334 0.0350
15:01-16:00, Sat., 23 May. 0.0378 0.0332 0.0353
14:01-15:00, Sat., 23 May. 0.0379 0.0333 0.0352
13:01-14:00, Sat., 23 May. 0.0372 0.0337 0.0354
12:01-13:00, Sat., 23 May. 0.0388 0.0325 0.0356
11:01-12:00, Sat., 23 May. 0.0398 0.0333 0.0355
10:01-11:00, Sat., 23 May. 0.0377 0.0322 0.0354
09:01-10:00, Sat., 23 May. 0.0375 0.0329 0.0348
08:01-09:00, Sat., 23 May. 0.0373 0.0335 0.0354
07:01-08:00, Sat., 23 May. 0.0370 0.0334 0.0353
06:01-07:00, Sat., 23 May. 0.0371 0.0328 0.0353
05:01-06:00, Sat., 23 May. 0.0368 0.0338 0.0352
04:01-05:00, Sat., 23 May. 0.0382 0.0335 0.0355
03:01-04:00, Sat., 23 May. 0.0385 0.0332 0.0352
02:01-03:00, Sat., 23 May. 0.0373 0.0328 0.0354
01:01-02:00, Sat., 23 May. 0.0372 0.0333 0.0352
00:01-01:00, Sat., 23 May. 0.0377 0.0331 0.0353
23:01-24:00, Fri., 22 May. 0.0379 0.0332 0.0353
22:01-23:00, Fri., 22 May. 0.0374 0.0336 0.0353
21:01-22:00, Fri., 22 May. 0.0370 0.0335 0.0353
20:01-21:00, Fri., 22 May. 0.0382 0.0334 0.0354
19:01-20:00, Fri., 22 May. 0.0378 0.0331 0.0352
18:01-19:00, Fri., 22 May. 0.0389 0.0325 0.0357
17:01-18:00, Fri., 22 May. 0.0407 0.0345 0.0368
16:01-17:00, Fri., 22 May. 0.0407 0.0349 0.0373
15:01-16:00, Fri., 22 May. 0.0411 0.0353 0.0371