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
16:01-17:00, Wed., 26 Nov. 0.0381 0.0339 0.0354
15:01-16:00, Wed., 26 Nov. 0.0374 0.0336 0.0353
14:01-15:00, Wed., 26 Nov. 0.0375 0.0331 0.0354
13:01-14:00, Wed., 26 Nov. 0.0393 0.0331 0.0355
12:01-13:00, Wed., 26 Nov. 0.0379 0.0337 0.0358
11:01-12:00, Wed., 26 Nov. 0.0390 0.0340 0.0360
10:01-11:00, Wed., 26 Nov. 0.0393 0.0342 0.0364
09:01-10:00, Wed., 26 Nov. 0.0408 0.0341 0.0362
08:01-09:00, Wed., 26 Nov. 0.0402 0.0344 0.0364
07:01-08:00, Wed., 26 Nov. 0.0395 0.0337 0.0363
06:01-07:00, Wed., 26 Nov. 0.0404 0.0342 0.0368
05:01-06:00, Wed., 26 Nov. 0.0391 0.0345 0.0366
04:01-05:00, Wed., 26 Nov. 0.0407 0.0338 0.0366
03:01-04:00, Wed., 26 Nov. 0.0393 0.0346 0.0368
02:01-03:00, Wed., 26 Nov. 0.0402 0.0348 0.0368
01:01-02:00, Wed., 26 Nov. 0.0403 0.0342 0.0367
00:01-01:00, Wed., 26 Nov. 0.0398 0.0345 0.0364
23:01-24:00, Tue., 25 Nov. 0.0384 0.0347 0.0364
22:01-23:00, Tue., 25 Nov. 0.0402 0.0349 0.0367
21:01-22:00, Tue., 25 Nov. 0.0378 0.0350 0.0362
20:01-21:00, Tue., 25 Nov. 0.0383 0.0329 0.0358
19:01-20:00, Tue., 25 Nov. 0.0374 0.0333 0.0356
18:01-19:00, Tue., 25 Nov. 0.0381 0.0340 0.0360
17:01-18:00, Tue., 25 Nov. 0.0394 0.0341 0.0365
16:01-17:00, Tue., 25 Nov. 0.0428 0.0355 0.0383
15:01-16:00, Tue., 25 Nov. 0.0427 0.0357 0.0379
14:01-15:00, Tue., 25 Nov. 0.0414 0.0356 0.0377
13:01-14:00, Tue., 25 Nov. 0.0450 0.0365 0.0401
12:01-13:00, Tue., 25 Nov. 0.0438 0.0371 0.0405
11:01-12:00, Tue., 25 Nov. 0.0432 0.0345 0.0378
10:01-11:00, Tue., 25 Nov. 0.0400 0.0349 0.0369
09:01-10:00, Tue., 25 Nov. 0.0405 0.0344 0.0375
08:01-09:00, Tue., 25 Nov. 0.0410 0.0350 0.0368
07:01-08:00, Tue., 25 Nov. 0.0390 0.0346 0.0365
06:01-07:00, Tue., 25 Nov. 0.0377 0.0344 0.0361
05:01-06:00, Tue., 25 Nov. 0.0401 0.0336 0.0362
04:01-05:00, Tue., 25 Nov. 0.0386 0.0342 0.0363
03:01-04:00, Tue., 25 Nov. 0.0383 0.0343 0.0363
02:01-03:00, Tue., 25 Nov. 0.0394 0.0341 0.0362
01:01-02:00, Tue., 25 Nov. 0.0397 0.0339 0.0364
00:01-01:00, Tue., 25 Nov. 0.0386 0.0336 0.0361
23:01-24:00, Mon., 24 Nov. 0.0399 0.0332 0.0360
22:01-23:00, Mon., 24 Nov. 0.0383 0.0339 0.0358
21:01-22:00, Mon., 24 Nov. 0.0371 0.0326 0.0353
20:01-21:00, Mon., 24 Nov. 0.0373 0.0339 0.0356
19:01-20:00, Mon., 24 Nov. 0.0387 0.0332 0.0356
18:01-19:00, Mon., 24 Nov. 0.0376 0.0337 0.0355
17:01-18:00, Mon., 24 Nov. 0.0397 0.0341 0.0359
16:01-17:00, Mon., 24 Nov. 0.0374 0.0329 0.0354
15:01-16:00, Mon., 24 Nov. 0.0376 0.0337 0.0356
14:01-15:00, Mon., 24 Nov. 0.0375 0.0338 0.0356
13:01-14:00, Mon., 24 Nov. 0.0393 0.0334 0.0360
12:01-13:00, Mon., 24 Nov. 0.0384 0.0341 0.0360
11:01-12:00, Mon., 24 Nov. 0.0397 0.0337 0.0362
10:01-11:00, Mon., 24 Nov. 0.0406 0.0345 0.0368
09:01-10:00, Mon., 24 Nov. 0.0399 0.0346 0.0370
08:01-09:00, Mon., 24 Nov. 0.0405 0.0342 0.0369
07:01-08:00, Mon., 24 Nov. 0.0401 0.0351 0.0369
06:01-07:00, Mon., 24 Nov. 0.0398 0.0345 0.0368
05:01-06:00, Mon., 24 Nov. 0.0398 0.0339 0.0364
04:01-05:00, Mon., 24 Nov. 0.0391 0.0344 0.0366
03:01-04:00, Mon., 24 Nov. 0.0401 0.0344 0.0369
02:01-03:00, Mon., 24 Nov. 0.0384 0.0344 0.0364
01:01-02:00, Mon., 24 Nov. 0.0400 0.0336 0.0360
00:01-01:00, Mon., 24 Nov. 0.0389 0.0337 0.0362
23:01-24:00, Sun., 23 Nov. 0.0394 0.0344 0.0359
22:01-23:00, Sun., 23 Nov. 0.0391 0.0339 0.0359
21:01-22:00, Sun., 23 Nov. 0.0396 0.0335 0.0359
20:01-21:00, Sun., 23 Nov. 0.0390 0.0333 0.0359
19:01-20:00, Sun., 23 Nov. 0.0394 0.0334 0.0358
18:01-19:00, Sun., 23 Nov. 0.0380 0.0330 0.0359
17:01-18:00, Sun., 23 Nov. 0.0383 0.0338 0.0358
16:01-17:00, Sun., 23 Nov. 0.0380 0.0329 0.0356
15:01-16:00, Sun., 23 Nov. 0.0391 0.0339 0.0357
14:01-15:00, Sun., 23 Nov. 0.0387 0.0336 0.0358
13:01-14:00, Sun., 23 Nov. 0.0381 0.0334 0.0360
12:01-13:00, Sun., 23 Nov. 0.0376 0.0338 0.0361
11:01-12:00, Sun., 23 Nov. 0.0392 0.0341 0.0362
10:01-11:00, Sun., 23 Nov. 0.0404 0.0344 0.0365
09:01-10:00, Sun., 23 Nov. 0.0389 0.0341 0.0365
08:01-09:00, Sun., 23 Nov. 0.0401 0.0348 0.0364
07:01-08:00, Sun., 23 Nov. 0.0409 0.0357 0.0377
06:01-07:00, Sun., 23 Nov. 0.0404 0.0343 0.0371
05:01-06:00, Sun., 23 Nov. 0.0396 0.0350 0.0367
04:01-05:00, Sun., 23 Nov. 0.0396 0.0344 0.0363
03:01-04:00, Sun., 23 Nov. 0.0386 0.0331 0.0360
02:01-03:00, Sun., 23 Nov. 0.0381 0.0334 0.0359
01:01-02:00, Sun., 23 Nov. 0.0389 0.0338 0.0357
00:01-01:00, Sun., 23 Nov. 0.0390 0.0337 0.0359
23:01-24:00, Sat., 22 Nov. 0.0384 0.0333 0.0356
22:01-23:00, Sat., 22 Nov. 0.0390 0.0328 0.0353
21:01-22:00, Sat., 22 Nov. 0.0387 0.0331 0.0350
20:01-21:00, Sat., 22 Nov. 0.0374 0.0334 0.0354
19:01-20:00, Sat., 22 Nov. 0.0367 0.0324 0.0351
18:01-19:00, Sat., 22 Nov. 0.0378 0.0332 0.0355
17:01-18:00, Sat., 22 Nov. 0.0376 0.0335 0.0356
16:01-17:00, Sat., 22 Nov. 0.0416 0.0329 0.0356
15:01-16:00, Sat., 22 Nov. 0.0372 0.0330 0.0355
14:01-15:00, Sat., 22 Nov. 0.0395 0.0339 0.0357
13:01-14:00, Sat., 22 Nov. 0.0372 0.0335 0.0354
12:01-13:00, Sat., 22 Nov. 0.0390 0.0335 0.0356
11:01-12:00, Sat., 22 Nov. 0.0386 0.0329 0.0357
10:01-11:00, Sat., 22 Nov. 0.0376 0.0320 0.0358
09:01-10:00, Sat., 22 Nov. 0.0393 0.0342 0.0359
08:01-09:00, Sat., 22 Nov. 0.0379 0.0339 0.0359
07:01-08:00, Sat., 22 Nov. 0.0372 0.0336 0.0356
06:01-07:00, Sat., 22 Nov. 0.0374 0.0337 0.0358
05:01-06:00, Sat., 22 Nov. 0.0385 0.0341 0.0360
04:01-05:00, Sat., 22 Nov. 0.0375 0.0331 0.0357
03:01-04:00, Sat., 22 Nov. 0.0376 0.0337 0.0355
02:01-03:00, Sat., 22 Nov. 0.0391 0.0334 0.0360
01:01-02:00, Sat., 22 Nov. 0.0387 0.0345 0.0362
00:01-01:00, Sat., 22 Nov. 0.0412 0.0336 0.0364
23:01-24:00, Fri., 21 Nov. 0.0391 0.0338 0.0362
22:01-23:00, Fri., 21 Nov. 0.0385 0.0344 0.0363
21:01-22:00, Fri., 21 Nov. 0.0381 0.0343 0.0362
20:01-21:00, Fri., 21 Nov. 0.0392 0.0342 0.0361
19:01-20:00, Fri., 21 Nov. 0.0394 0.0339 0.0358
18:01-19:00, Fri., 21 Nov. 0.0374 0.0337 0.0357
17:01-18:00, Fri., 21 Nov. 0.0372 0.0337 0.0357
16:01-17:00, Fri., 21 Nov. 0.0382 0.0330 0.0360
15:01-16:00, Fri., 21 Nov. 0.0394 0.0345 0.0363
14:01-15:00, Fri., 21 Nov. 0.0396 0.0343 0.0362
13:01-14:00, Fri., 21 Nov. 0.0391 0.0341 0.0359
12:01-13:00, Fri., 21 Nov. 0.0388 0.0339 0.0360
11:01-12:00, Fri., 21 Nov. 0.0392 0.0347 0.0361
10:01-11:00, Fri., 21 Nov. 0.0384 0.0338 0.0360
09:01-10:00, Fri., 21 Nov. 0.0404 0.0349 0.0367
08:01-09:00, Fri., 21 Nov. 0.0415 0.0347 0.0372
07:01-08:00, Fri., 21 Nov. 0.0405 0.0342 0.0366
06:01-07:00, Fri., 21 Nov. 0.0409 0.0350 0.0367
05:01-06:00, Fri., 21 Nov. 0.0400 0.0342 0.0369
04:01-05:00, Fri., 21 Nov. 0.0399 0.0345 0.0364
03:01-04:00, Fri., 21 Nov. 0.0401 0.0336 0.0364
02:01-03:00, Fri., 21 Nov. 0.0391 0.0344 0.0361
01:01-02:00, Fri., 21 Nov. 0.0386 0.0343 0.0363
00:01-01:00, Fri., 21 Nov. 0.0397 0.0346 0.0360
23:01-24:00, Thu., 20 Nov. 0.0385 0.0334 0.0360
22:01-23:00, Thu., 20 Nov. 0.0388 0.0342 0.0360
21:01-22:00, Thu., 20 Nov. 0.0395 0.0342 0.0358
20:01-21:00, Thu., 20 Nov. 0.0368 0.0334 0.0353
19:01-20:00, Thu., 20 Nov. 0.0385 0.0337 0.0356
18:01-19:00, Thu., 20 Nov. 0.0375 0.0335 0.0353
17:01-18:00, Thu., 20 Nov. 0.0372 0.0337 0.0356
16:01-17:00, Thu., 20 Nov. 0.0372 0.0336 0.0354
15:01-16:00, Thu., 20 Nov. 0.0371 0.0333 0.0354
14:01-15:00, Thu., 20 Nov. 0.0374 0.0330 0.0356
13:01-14:00, Thu., 20 Nov. 0.0372 0.0328 0.0353
12:01-13:00, Thu., 20 Nov. 0.0383 0.0337 0.0355
11:01-12:00, Thu., 20 Nov. 0.0391 0.0340 0.0359
10:01-11:00, Thu., 20 Nov. 0.0390 0.0343 0.0361
09:01-10:00, Thu., 20 Nov. 0.0404 0.0336 0.0363
08:01-09:00, Thu., 20 Nov. 0.0372 0.0336 0.0362
07:01-08:00, Thu., 20 Nov. 0.0380 0.0339 0.0361
06:01-07:00, Thu., 20 Nov. 0.0400 0.0343 0.0361
05:01-06:00, Thu., 20 Nov. 0.0396 0.0335 0.0360
04:01-05:00, Thu., 20 Nov. 0.0401 0.0345 0.0363
03:01-04:00, Thu., 20 Nov. 0.0383 0.0332 0.0356
02:01-03:00, Thu., 20 Nov. 0.0379 0.0336 0.0355
01:01-02:00, Thu., 20 Nov. 0.0371 0.0330 0.0354
00:01-01:00, Thu., 20 Nov. 0.0373 0.0330 0.0352
23:01-24:00, Wed., 19 Nov. 0.0370 0.0318 0.0353
22:01-23:00, Wed., 19 Nov. 0.0374 0.0334 0.0355
21:01-22:00, Wed., 19 Nov. 0.0390 0.0333 0.0360
20:01-21:00, Wed., 19 Nov. 0.0388 0.0329 0.0354
19:01-20:00, Wed., 19 Nov. 0.0373 0.0329 0.0350
18:01-19:00, Wed., 19 Nov. 0.0382 0.0333 0.0354
17:01-18:00, Wed., 19 Nov. 0.0375 0.0323 0.0351
16:01-17:00, Wed., 19 Nov. 0.0369 0.0334 0.0352
15:01-16:00, Wed., 19 Nov. 0.0370 0.0333 0.0352
14:01-15:00, Wed., 19 Nov. 0.0372 0.0331 0.0353
13:01-14:00, Wed., 19 Nov. 0.0368 0.0333 0.0352
12:01-13:00, Wed., 19 Nov. 0.0375 0.0333 0.0353
11:01-12:00, Wed., 19 Nov. 0.0387 0.0332 0.0353
10:01-11:00, Wed., 19 Nov. 0.0375 0.0332 0.0352
09:01-10:00, Wed., 19 Nov. 0.0389 0.0329 0.0355
08:01-09:00, Wed., 19 Nov. 0.0368 0.0334 0.0353
07:01-08:00, Wed., 19 Nov. 0.0370 0.0337 0.0353
06:01-07:00, Wed., 19 Nov. 0.0370 0.0335 0.0354
05:01-06:00, Wed., 19 Nov. 0.0370 0.0318 0.0352
04:01-05:00, Wed., 19 Nov. 0.0378 0.0343 0.0357
03:01-04:00, Wed., 19 Nov. 0.0375 0.0337 0.0356
02:01-03:00, Wed., 19 Nov. 0.0387 0.0340 0.0358
01:01-02:00, Wed., 19 Nov. 0.0379 0.0337 0.0354
00:01-01:00, Wed., 19 Nov. 0.0379 0.0339 0.0358
23:01-24:00, Tue., 18 Nov. 0.0383 0.0331 0.0355
22:01-23:00, Tue., 18 Nov. 0.0375 0.0327 0.0355
21:01-22:00, Tue., 18 Nov. 0.0384 0.0344 0.0361
20:01-21:00, Tue., 18 Nov. 0.0384 0.0344 0.0365
19:01-20:00, Tue., 18 Nov. 0.0411 0.0355 0.0375
18:01-19:00, Tue., 18 Nov. 0.0436 0.0356 0.0379
17:01-18:00, Tue., 18 Nov. 0.0403 0.0346 0.0371
16:01-17:00, Tue., 18 Nov. 0.0425 0.0350 0.0374
15:01-16:00, Tue., 18 Nov. 0.0400 0.0355 0.0375
14:01-15:00, Tue., 18 Nov. 0.0406 0.0346 0.0373
13:01-14:00, Tue., 18 Nov. 0.0395 0.0344 0.0366
12:01-13:00, Tue., 18 Nov. 0.0400 0.0342 0.0363
11:01-12:00, Tue., 18 Nov. 0.0391 0.0343 0.0364
10:01-11:00, Tue., 18 Nov. 0.0401 0.0346 0.0365
09:01-10:00, Tue., 18 Nov. 0.0388 0.0339 0.0359
08:01-09:00, Tue., 18 Nov. 0.0372 0.0337 0.0359
07:01-08:00, Tue., 18 Nov. 0.0388 0.0339 0.0359
06:01-07:00, Tue., 18 Nov. 0.0392 0.0340 0.0358
05:01-06:00, Tue., 18 Nov. 0.0388 0.0337 0.0357
04:01-05:00, Tue., 18 Nov. 0.0374 0.0342 0.0357
03:01-04:00, Tue., 18 Nov. 0.0380 0.0332 0.0355
02:01-03:00, Tue., 18 Nov. 0.0380 0.0334 0.0357
01:01-02:00, Tue., 18 Nov. 0.0383 0.0340 0.0358
00:01-01:00, Tue., 18 Nov. 0.0399 0.0334 0.0356
23:01-24:00, Mon., 17 Nov. 0.0386 0.0327 0.0357
22:01-23:00, Mon., 17 Nov. 0.0376 0.0338 0.0356
21:01-22:00, Mon., 17 Nov. 0.0387 0.0337 0.0356
20:01-21:00, Mon., 17 Nov. 0.0386 0.0339 0.0358
19:01-20:00, Mon., 17 Nov. 0.0383 0.0339 0.0357
18:01-19:00, Mon., 17 Nov. 0.0378 0.0337 0.0358
17:01-18:00, Mon., 17 Nov. 0.0378 0.0330 0.0352
16:01-17:00, Mon., 17 Nov. 0.0401 0.0327 0.0354
15:01-16:00, Mon., 17 Nov. 0.0370 0.0332 0.0353
14:01-15:00, Mon., 17 Nov. 0.0374 0.0326 0.0353
13:01-14:00, Mon., 17 Nov. 0.0378 0.0327 0.0356
12:01-13:00, Mon., 17 Nov. 0.0371 0.0332 0.0354
11:01-12:00, Mon., 17 Nov. 0.0374 0.0328 0.0352
10:01-11:00, Mon., 17 Nov. 0.0388 0.0326 0.0353
09:01-10:00, Mon., 17 Nov. 0.0379 0.0339 0.0359
08:01-09:00, Mon., 17 Nov. 0.0392 0.0343 0.0362
07:01-08:00, Mon., 17 Nov. 0.0384 0.0336 0.0362
06:01-07:00, Mon., 17 Nov. 0.0373 0.0339 0.0359
05:01-06:00, Mon., 17 Nov. 0.0384 0.0337 0.0360
04:01-05:00, Mon., 17 Nov. 0.0387 0.0346 0.0362
03:01-04:00, Mon., 17 Nov. 0.0393 0.0341 0.0361
02:01-03:00, Mon., 17 Nov. 0.0401 0.0339 0.0359
01:01-02:00, Mon., 17 Nov. 0.0390 0.0334 0.0360
00:01-01:00, Mon., 17 Nov. 0.0388 0.0344 0.0360
23:01-24:00, Sun., 16 Nov. 0.0379 0.0334 0.0353
22:01-23:00, Sun., 16 Nov. 0.0376 0.0328 0.0354
21:01-22:00, Sun., 16 Nov. 0.0368 0.0332 0.0351
20:01-21:00, Sun., 16 Nov. 0.0376 0.0327 0.0352
19:01-20:00, Sun., 16 Nov. 0.0372 0.0333 0.0353
18:01-19:00, Sun., 16 Nov. 0.0378 0.0325 0.0352
17:01-18:00, Sun., 16 Nov. 0.0380 0.0327 0.0352