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, Sat., 14 Jun. 0.0372 0.0322 0.0351
09:01-10:00, Sat., 14 Jun. 0.0369 0.0329 0.0352
08:01-09:00, Sat., 14 Jun. 0.0380 0.0332 0.0352
07:01-08:00, Sat., 14 Jun. 0.0371 0.0334 0.0355
06:01-07:00, Sat., 14 Jun. 0.0379 0.0333 0.0350
05:01-06:00, Sat., 14 Jun. 0.0374 0.0329 0.0352
04:01-05:00, Sat., 14 Jun. 0.0380 0.0332 0.0352
03:01-04:00, Sat., 14 Jun. 0.0379 0.0331 0.0353
02:01-03:00, Sat., 14 Jun. 0.0378 0.0333 0.0354
01:01-02:00, Sat., 14 Jun. 0.0375 0.0327 0.0353
00:01-01:00, Sat., 14 Jun. 0.0385 0.0331 0.0352
23:01-24:00, Fri., 13 Jun. 0.0376 0.0339 0.0352
22:01-23:00, Fri., 13 Jun. 0.0378 0.0327 0.0353
21:01-22:00, Fri., 13 Jun. 0.0388 0.0323 0.0355
20:01-21:00, Fri., 13 Jun. 0.0387 0.0332 0.0355
19:01-20:00, Fri., 13 Jun. 0.0372 0.0323 0.0350
18:01-19:00, Fri., 13 Jun. 0.0380 0.0331 0.0352
17:01-18:00, Fri., 13 Jun. 0.0370 0.0321 0.0352
16:01-17:00, Fri., 13 Jun. 0.0373 0.0333 0.0353
15:01-16:00, Fri., 13 Jun. 0.0366 0.0317 0.0347
14:01-15:00, Fri., 13 Jun. 0.0380 0.0323 0.0353
13:01-14:00, Fri., 13 Jun. 0.0370 0.0317 0.0348
12:01-13:00, Fri., 13 Jun. 0.0376 0.0327 0.0351
11:01-12:00, Fri., 13 Jun. 0.0372 0.0320 0.0350
10:01-11:00, Fri., 13 Jun. 0.0369 0.0332 0.0352
09:01-10:00, Fri., 13 Jun. 0.0386 0.0330 0.0355
08:01-09:00, Fri., 13 Jun. 0.0372 0.0326 0.0355
07:01-08:00, Fri., 13 Jun. 0.0389 0.0336 0.0361
06:01-07:00, Fri., 13 Jun. 0.0395 0.0331 0.0358
05:01-06:00, Fri., 13 Jun. 0.0385 0.0336 0.0356
04:01-05:00, Fri., 13 Jun. 0.0381 0.0330 0.0355
03:01-04:00, Fri., 13 Jun. 0.0367 0.0333 0.0353
02:01-03:00, Fri., 13 Jun. 0.0388 0.0321 0.0352
01:01-02:00, Fri., 13 Jun. 0.0379 0.0334 0.0353
00:01-01:00, Fri., 13 Jun. 0.0379 0.0329 0.0354
23:01-24:00, Thu., 12 Jun. 0.0372 0.0335 0.0353
22:01-23:00, Thu., 12 Jun. 0.0373 0.0333 0.0352
21:01-22:00, Thu., 12 Jun. 0.0372 0.0326 0.0351
20:01-21:00, Thu., 12 Jun. 0.0368 0.0333 0.0352
19:01-20:00, Thu., 12 Jun. 0.0368 0.0329 0.0348
18:01-19:00, Thu., 12 Jun. 0.0375 0.0327 0.0351
17:01-18:00, Thu., 12 Jun. 0.0373 0.0329 0.0349
16:01-17:00, Thu., 12 Jun. 0.0368 0.0334 0.0354
15:01-16:00, Thu., 12 Jun. 0.0372 0.0331 0.0353
14:01-15:00, Thu., 12 Jun. 0.0380 0.0330 0.0350
13:01-14:00, Thu., 12 Jun. 0.0367 0.0332 0.0349
12:01-13:00, Thu., 12 Jun. 0.0392 0.0328 0.0352
11:01-12:00, Thu., 12 Jun. 0.0369 0.0329 0.0351
10:01-11:00, Thu., 12 Jun. 0.0383 0.0313 0.0352
09:01-10:00, Thu., 12 Jun. 0.0374 0.0335 0.0353
08:01-09:00, Thu., 12 Jun. 0.0392 0.0338 0.0353
07:01-08:00, Thu., 12 Jun. 0.0377 0.0329 0.0355
06:01-07:00, Thu., 12 Jun. 0.0384 0.0338 0.0354
05:01-06:00, Thu., 12 Jun. 0.0383 0.0330 0.0353
04:01-05:00, Thu., 12 Jun. 0.0369 0.0336 0.0353
03:01-04:00, Thu., 12 Jun. 0.0373 0.0329 0.0350
02:01-03:00, Thu., 12 Jun. 0.0368 0.0329 0.0350
01:01-02:00, Thu., 12 Jun. 0.0371 0.0317 0.0351
00:01-01:00, Thu., 12 Jun. 0.0371 0.0330 0.0350
23:01-24:00, Wed., 11 Jun. 0.0376 0.0324 0.0349
22:01-23:00, Wed., 11 Jun. 0.0371 0.0330 0.0349
21:01-22:00, Wed., 11 Jun. 0.0381 0.0336 0.0353
20:01-21:00, Wed., 11 Jun. 0.0380 0.0320 0.0351
19:01-20:00, Wed., 11 Jun. 0.0378 0.0332 0.0351
18:01-19:00, Wed., 11 Jun. 0.0397 0.0333 0.0364
17:01-18:00, Wed., 11 Jun. 0.0417 0.0355 0.0384
16:01-17:00, Wed., 11 Jun. 0.0522 0.0385 0.0443
15:01-16:00, Wed., 11 Jun. 0.0531 0.0417 0.0485
14:01-15:00, Wed., 11 Jun. 0.0427 0.0356 0.0382
13:01-14:00, Wed., 11 Jun. 0.0378 0.0336 0.0357
12:01-13:00, Wed., 11 Jun. 0.0398 0.0337 0.0363
11:01-12:00, Wed., 11 Jun. 0.0418 0.0356 0.0382
10:01-11:00, Wed., 11 Jun. 0.0395 0.0336 0.0365
09:01-10:00, Wed., 11 Jun. 0.0405 0.0338 0.0366
08:01-09:00, Wed., 11 Jun. 0.0430 0.0356 0.0389
07:01-08:00, Wed., 11 Jun. 0.0419 0.0357 0.0386
06:01-07:00, Wed., 11 Jun. 0.0382 0.0331 0.0360
05:01-06:00, Wed., 11 Jun. 0.0380 0.0335 0.0353
04:01-05:00, Wed., 11 Jun. 0.0367 0.0326 0.0351
03:01-04:00, Wed., 11 Jun. 0.0374 0.0344 0.0359
02:01-03:00, Wed., 11 Jun. 0.0378 0.0330 0.0356
01:01-02:00, Wed., 11 Jun. 0.0367 0.0330 0.0349
00:01-01:00, Wed., 11 Jun. 0.0369 0.0333 0.0352
23:01-24:00, Tue., 10 Jun. 0.0386 0.0336 0.0354
22:01-23:00, Tue., 10 Jun. 0.0398 0.0335 0.0355
21:01-22:00, Tue., 10 Jun. 0.0389 0.0338 0.0355
20:01-21:00, Tue., 10 Jun. 0.0368 0.0331 0.0350
19:01-20:00, Tue., 10 Jun. 0.0373 0.0328 0.0350
18:01-19:00, Tue., 10 Jun. 0.0374 0.0337 0.0354
17:01-18:00, Tue., 10 Jun. 0.0386 0.0333 0.0356
16:01-17:00, Tue., 10 Jun. 0.0408 0.0338 0.0370
15:01-16:00, Tue., 10 Jun. 0.0448 0.0371 0.0413
14:01-15:00, Tue., 10 Jun. 0.0449 0.0370 0.0412
13:01-14:00, Tue., 10 Jun. 0.0449 0.0368 0.0398
12:01-13:00, Tue., 10 Jun. 0.0434 0.0372 0.0406
11:01-12:00, Tue., 10 Jun. 0.0456 0.0368 0.0410
10:01-11:00, Tue., 10 Jun. 0.0461 0.0376 0.0409
09:01-10:00, Tue., 10 Jun. 0.0508 0.0413 0.0454
08:01-09:00, Tue., 10 Jun. 0.0506 0.0413 0.0457
07:01-08:00, Tue., 10 Jun. 0.0488 0.0406 0.0444
06:01-07:00, Tue., 10 Jun. 0.0431 0.0350 0.0384
05:01-06:00, Tue., 10 Jun. 0.0409 0.0338 0.0374
04:01-05:00, Tue., 10 Jun. 0.0401 0.0352 0.0373
03:01-04:00, Tue., 10 Jun. 0.0411 0.0351 0.0373
02:01-03:00, Tue., 10 Jun. 0.0386 0.0346 0.0362
01:01-02:00, Tue., 10 Jun. 0.0390 0.0332 0.0357
00:01-01:00, Tue., 10 Jun. 0.0382 0.0335 0.0356
23:01-24:00, Mon., 09 Jun. 0.0372 0.0345 0.0358
22:01-23:00, Mon., 09 Jun. 0.0414 0.0336 0.0368
21:01-22:00, Mon., 09 Jun. 0.0422 0.0363 0.0383
20:01-21:00, Mon., 09 Jun. 0.0393 0.0353 0.0368
19:01-20:00, Mon., 09 Jun. 0.0410 0.0357 0.0379
18:01-19:00, Mon., 09 Jun. 0.0425 0.0359 0.0388
17:01-18:00, Mon., 09 Jun. 0.0420 0.0355 0.0382
16:01-17:00, Mon., 09 Jun. 0.0376 0.0339 0.0357
15:01-16:00, Mon., 09 Jun. 0.0397 0.0332 0.0354
14:01-15:00, Mon., 09 Jun. 0.0367 0.0325 0.0349
13:01-14:00, Mon., 09 Jun. 0.0379 0.0329 0.0350
12:01-13:00, Mon., 09 Jun. 0.0373 0.0331 0.0350
11:01-12:00, Mon., 09 Jun. 0.0373 0.0321 0.0352
10:01-11:00, Mon., 09 Jun. 0.0378 0.0339 0.0355
09:01-10:00, Mon., 09 Jun. 0.0400 0.0340 0.0363
08:01-09:00, Mon., 09 Jun. 0.0397 0.0344 0.0363
07:01-08:00, Mon., 09 Jun. 0.0387 0.0344 0.0363
06:01-07:00, Mon., 09 Jun. 0.0398 0.0343 0.0365
05:01-06:00, Mon., 09 Jun. 0.0394 0.0345 0.0366
04:01-05:00, Mon., 09 Jun. 0.0388 0.0335 0.0359
03:01-04:00, Mon., 09 Jun. 0.0391 0.0337 0.0360
02:01-03:00, Mon., 09 Jun. 0.0398 0.0341 0.0357
01:01-02:00, Mon., 09 Jun. 0.0373 0.0334 0.0355
00:01-01:00, Mon., 09 Jun. 0.0375 0.0333 0.0356
23:01-24:00, Sun., 08 Jun. 0.0380 0.0335 0.0355
22:01-23:00, Sun., 08 Jun. 0.0380 0.0331 0.0356
21:01-22:00, Sun., 08 Jun. 0.0380 0.0337 0.0355
20:01-21:00, Sun., 08 Jun. 0.0377 0.0337 0.0355
19:01-20:00, Sun., 08 Jun. 0.0383 0.0323 0.0354
18:01-19:00, Sun., 08 Jun. 0.0382 0.0324 0.0352
17:01-18:00, Sun., 08 Jun. 0.0399 0.0332 0.0352
16:01-17:00, Sun., 08 Jun. 0.0370 0.0331 0.0353
15:01-16:00, Sun., 08 Jun. 0.0368 0.0327 0.0350
14:01-15:00, Sun., 08 Jun. 0.0392 0.0317 0.0354
13:01-14:00, Sun., 08 Jun. 0.0371 0.0330 0.0353
12:01-13:00, Sun., 08 Jun. 0.0380 0.0334 0.0354
11:01-12:00, Sun., 08 Jun. 0.0378 0.0323 0.0351
10:01-11:00, Sun., 08 Jun. 0.0368 0.0339 0.0355
09:01-10:00, Sun., 08 Jun. 0.0401 0.0335 0.0359
08:01-09:00, Sun., 08 Jun. 0.0388 0.0339 0.0362
07:01-08:00, Sun., 08 Jun. 0.0398 0.0338 0.0365
06:01-07:00, Sun., 08 Jun. 0.0406 0.0342 0.0362
05:01-06:00, Sun., 08 Jun. 0.0400 0.0347 0.0367
04:01-05:00, Sun., 08 Jun. 0.0403 0.0352 0.0371
03:01-04:00, Sun., 08 Jun. 0.0373 0.0327 0.0351
02:01-03:00, Sun., 08 Jun. 0.0367 0.0335 0.0350
01:01-02:00, Sun., 08 Jun. 0.0374 0.0327 0.0351
00:01-01:00, Sun., 08 Jun. 0.0371 0.0329 0.0352
23:01-24:00, Sat., 07 Jun. 0.0367 0.0328 0.0351
22:01-23:00, Sat., 07 Jun. 0.0376 0.0329 0.0350
21:01-22:00, Sat., 07 Jun. 0.0368 0.0316 0.0350
20:01-21:00, Sat., 07 Jun. 0.0366 0.0331 0.0351
19:01-20:00, Sat., 07 Jun. 0.0369 0.0326 0.0348
18:01-19:00, Sat., 07 Jun. 0.0371 0.0324 0.0351
17:01-18:00, Sat., 07 Jun. 0.0385 0.0332 0.0352
16:01-17:00, Sat., 07 Jun. 0.0369 0.0333 0.0352
15:01-16:00, Sat., 07 Jun. 0.0370 0.0332 0.0350
14:01-15:00, Sat., 07 Jun. 0.0374 0.0331 0.0353
13:01-14:00, Sat., 07 Jun. 0.0380 0.0329 0.0353
12:01-13:00, Sat., 07 Jun. 0.0383 0.0336 0.0353
11:01-12:00, Sat., 07 Jun. 0.0376 0.0323 0.0352
10:01-11:00, Sat., 07 Jun. 0.0368 0.0332 0.0351
09:01-10:00, Sat., 07 Jun. 0.0374 0.0327 0.0352
08:01-09:00, Sat., 07 Jun. 0.0370 0.0327 0.0352
07:01-08:00, Sat., 07 Jun. 0.0368 0.0328 0.0351
06:01-07:00, Sat., 07 Jun. 0.0370 0.0328 0.0350
05:01-06:00, Sat., 07 Jun. 0.0375 0.0335 0.0352
04:01-05:00, Sat., 07 Jun. 0.0381 0.0333 0.0351
03:01-04:00, Sat., 07 Jun. 0.0368 0.0328 0.0351
02:01-03:00, Sat., 07 Jun. 0.0390 0.0331 0.0350
01:01-02:00, Sat., 07 Jun. 0.0375 0.0330 0.0350
00:01-01:00, Sat., 07 Jun. 0.0369 0.0327 0.0352
23:01-24:00, Fri., 06 Jun. 0.0374 0.0333 0.0351
22:01-23:00, Fri., 06 Jun. 0.0390 0.0332 0.0352
21:01-22:00, Fri., 06 Jun. 0.0372 0.0334 0.0354
20:01-21:00, Fri., 06 Jun. 0.0370 0.0321 0.0347
19:01-20:00, Fri., 06 Jun. 0.0368 0.0329 0.0350
18:01-19:00, Fri., 06 Jun. 0.0375 0.0325 0.0350
17:01-18:00, Fri., 06 Jun. 0.0372 0.0334 0.0353
16:01-17:00, Fri., 06 Jun. 0.0381 0.0325 0.0352
15:01-16:00, Fri., 06 Jun. 0.0382 0.0333 0.0352
14:01-15:00, Fri., 06 Jun. 0.0368 0.0334 0.0350
13:01-14:00, Fri., 06 Jun. 0.0372 0.0322 0.0349
12:01-13:00, Fri., 06 Jun. 0.0365 0.0330 0.0349
11:01-12:00, Fri., 06 Jun. 0.0391 0.0317 0.0347
10:01-11:00, Fri., 06 Jun. 0.0372 0.0341 0.0355
09:01-10:00, Fri., 06 Jun. 0.0399 0.0342 0.0363
08:01-09:00, Fri., 06 Jun. 0.0396 0.0343 0.0363
07:01-08:00, Fri., 06 Jun. 0.0402 0.0347 0.0367
06:01-07:00, Fri., 06 Jun. 0.0395 0.0340 0.0366
05:01-06:00, Fri., 06 Jun. 0.0409 0.0343 0.0366
04:01-05:00, Fri., 06 Jun. 0.0400 0.0349 0.0365
03:01-04:00, Fri., 06 Jun. 0.0393 0.0336 0.0362
02:01-03:00, Fri., 06 Jun. 0.0404 0.0340 0.0363
01:01-02:00, Fri., 06 Jun. 0.0389 0.0333 0.0361
00:01-01:00, Fri., 06 Jun. 0.0388 0.0341 0.0362
23:01-24:00, Thu., 05 Jun. 0.0385 0.0338 0.0361
22:01-23:00, Thu., 05 Jun. 0.0373 0.0341 0.0359
21:01-22:00, Thu., 05 Jun. 0.0383 0.0346 0.0360
20:01-21:00, Thu., 05 Jun. 0.0388 0.0328 0.0359
19:01-20:00, Thu., 05 Jun. 0.0385 0.0334 0.0356
18:01-19:00, Thu., 05 Jun. 0.0386 0.0338 0.0359
17:01-18:00, Thu., 05 Jun. 0.0383 0.0336 0.0359
16:01-17:00, Thu., 05 Jun. 0.0384 0.0334 0.0356
15:01-16:00, Thu., 05 Jun. 0.0388 0.0341 0.0358
14:01-15:00, Thu., 05 Jun. 0.0377 0.0338 0.0356
13:01-14:00, Thu., 05 Jun. 0.0405 0.0331 0.0356
12:01-13:00, Thu., 05 Jun. 0.0388 0.0325 0.0357
11:01-12:00, Thu., 05 Jun. 0.0380 0.0343 0.0360
10:01-11:00, Thu., 05 Jun. 0.0404 0.0344 0.0361
09:01-10:00, Thu., 05 Jun. 0.0376 0.0338 0.0358
08:01-09:00, Thu., 05 Jun. 0.0379 0.0324 0.0359
07:01-08:00, Thu., 05 Jun. 0.0400 0.0341 0.0364
06:01-07:00, Thu., 05 Jun. 0.0387 0.0338 0.0359
05:01-06:00, Thu., 05 Jun. 0.0380 0.0332 0.0358
04:01-05:00, Thu., 05 Jun. 0.0375 0.0338 0.0357
03:01-04:00, Thu., 05 Jun. 0.0412 0.0330 0.0358
02:01-03:00, Thu., 05 Jun. 0.0397 0.0333 0.0359
01:01-02:00, Thu., 05 Jun. 0.0391 0.0344 0.0363
00:01-01:00, Thu., 05 Jun. 0.0394 0.0332 0.0358
23:01-24:00, Wed., 04 Jun. 0.0374 0.0331 0.0356
22:01-23:00, Wed., 04 Jun. 0.0374 0.0342 0.0358
21:01-22:00, Wed., 04 Jun. 0.0385 0.0332 0.0357
20:01-21:00, Wed., 04 Jun. 0.0374 0.0336 0.0354
19:01-20:00, Wed., 04 Jun. 0.0398 0.0336 0.0357
18:01-19:00, Wed., 04 Jun. 0.0400 0.0332 0.0358
17:01-18:00, Wed., 04 Jun. 0.0376 0.0323 0.0354
16:01-17:00, Wed., 04 Jun. 0.0387 0.0330 0.0357
15:01-16:00, Wed., 04 Jun. 0.0392 0.0333 0.0357
14:01-15:00, Wed., 04 Jun. 0.0375 0.0332 0.0356
13:01-14:00, Wed., 04 Jun. 0.0392 0.0333 0.0357
12:01-13:00, Wed., 04 Jun. 0.0390 0.0338 0.0360
11:01-12:00, Wed., 04 Jun. 0.0396 0.0337 0.0356