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.

News about this monitoring post

〇Suspension of atmospheric radiation measurement due to repairs at the monitoring post (Shinjuku station)
Equipment repair work at the monitoring post (Shinjuku station) will be carried out from 13:00 on Thursday, September 5, 2024.
During this work, atmospheric radiation measurement will be suspended.
Restoration is scheduled for early December.

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, Thu., 05 Sep. 0.0398 0.0350 0.0361
09:01-10:00, Thu., 05 Sep. 0.0380 0.0332 0.0359
08:01-09:00, Thu., 05 Sep. 0.0383 0.0343 0.0361
07:01-08:00, Thu., 05 Sep. 0.0391 0.0343 0.0364
06:01-07:00, Thu., 05 Sep. 0.0385 0.0333 0.0364
05:01-06:00, Thu., 05 Sep. 0.0386 0.0337 0.0361
04:01-05:00, Thu., 05 Sep. 0.0402 0.0329 0.0360
03:01-04:00, Thu., 05 Sep. 0.0389 0.0342 0.0363
02:01-03:00, Thu., 05 Sep. 0.0398 0.0340 0.0362
01:01-02:00, Thu., 05 Sep. 0.0396 0.0345 0.0363
00:01-01:00, Thu., 05 Sep. 0.0388 0.0337 0.0361
23:01-24:00, Wed., 04 Sep. 0.0383 0.0339 0.0360
22:01-23:00, Wed., 04 Sep. 0.0384 0.0339 0.0358
21:01-22:00, Wed., 04 Sep. 0.0376 0.0340 0.0360
20:01-21:00, Wed., 04 Sep. 0.0382 0.0332 0.0360
19:01-20:00, Wed., 04 Sep. 0.0394 0.0333 0.0361
18:01-19:00, Wed., 04 Sep. 0.0394 0.0335 0.0362
17:01-18:00, Wed., 04 Sep. 0.0396 0.0341 0.0360
16:01-17:00, Wed., 04 Sep. 0.0391 0.0336 0.0364
15:01-16:00, Wed., 04 Sep. 0.0384 0.0342 0.0363
14:01-15:00, Wed., 04 Sep. 0.0397 0.0339 0.0360
13:01-14:00, Wed., 04 Sep. 0.0380 0.0345 0.0362
12:01-13:00, Wed., 04 Sep. 0.0391 0.0345 0.0362
11:01-12:00, Wed., 04 Sep. 0.0385 0.0341 0.0360
10:01-11:00, Wed., 04 Sep. 0.0399 0.0322 0.0359
09:01-10:00, Wed., 04 Sep. 0.0380 0.0339 0.0362
08:01-09:00, Wed., 04 Sep. 0.0383 0.0345 0.0363
07:01-08:00, Wed., 04 Sep. 0.0390 0.0344 0.0363
06:01-07:00, Wed., 04 Sep. 0.0380 0.0338 0.0362
05:01-06:00, Wed., 04 Sep. 0.0397 0.0341 0.0363
04:01-05:00, Wed., 04 Sep. 0.0382 0.0341 0.0361
03:01-04:00, Wed., 04 Sep. 0.0407 0.0339 0.0360
02:01-03:00, Wed., 04 Sep. 0.0393 0.0341 0.0361
01:01-02:00, Wed., 04 Sep. 0.0378 0.0331 0.0359
00:01-01:00, Wed., 04 Sep. 0.0388 0.0339 0.0358
23:01-24:00, Tue., 03 Sep. 0.0371 0.0337 0.0356
22:01-23:00, Tue., 03 Sep. 0.0386 0.0338 0.0358
21:01-22:00, Tue., 03 Sep. 0.0396 0.0338 0.0358
20:01-21:00, Tue., 03 Sep. 0.0379 0.0338 0.0358
19:01-20:00, Tue., 03 Sep. 0.0412 0.0334 0.0360
18:01-19:00, Tue., 03 Sep. 0.0381 0.0329 0.0359
17:01-18:00, Tue., 03 Sep. 0.0393 0.0341 0.0359
16:01-17:00, Tue., 03 Sep. 0.0386 0.0343 0.0359
15:01-16:00, Tue., 03 Sep. 0.0377 0.0340 0.0358
14:01-15:00, Tue., 03 Sep. 0.0404 0.0345 0.0368
13:01-14:00, Tue., 03 Sep. 0.0421 0.0357 0.0383
12:01-13:00, Tue., 03 Sep. 0.0493 0.0367 0.0431
11:01-12:00, Tue., 03 Sep. 0.0489 0.0385 0.0442
10:01-11:00, Tue., 03 Sep. 0.0400 0.0342 0.0362
09:01-10:00, Tue., 03 Sep. 0.0398 0.0334 0.0362
08:01-09:00, Tue., 03 Sep. 0.0391 0.0342 0.0362
07:01-08:00, Tue., 03 Sep. 0.0394 0.0341 0.0362
06:01-07:00, Tue., 03 Sep. 0.0398 0.0342 0.0365
05:01-06:00, Tue., 03 Sep. 0.0404 0.0348 0.0368
04:01-05:00, Tue., 03 Sep. 0.0397 0.0343 0.0364
03:01-04:00, Tue., 03 Sep. 0.0403 0.0341 0.0362
02:01-03:00, Tue., 03 Sep. 0.0391 0.0342 0.0363
01:01-02:00, Tue., 03 Sep. 0.0382 0.0343 0.0360
00:01-01:00, Tue., 03 Sep. 0.0391 0.0337 0.0361
23:01-24:00, Mon., 02 Sep. 0.0382 0.0342 0.0359
22:01-23:00, Mon., 02 Sep. 0.0379 0.0330 0.0358
21:01-22:00, Mon., 02 Sep. 0.0396 0.0340 0.0361
20:01-21:00, Mon., 02 Sep. 0.0378 0.0331 0.0358
19:01-20:00, Mon., 02 Sep. 0.0389 0.0337 0.0358
18:01-19:00, Mon., 02 Sep. 0.0375 0.0336 0.0357
17:01-18:00, Mon., 02 Sep. 0.0378 0.0330 0.0357
08:01-09:00, Mon., 02 Sep. 0.0377 0.0332 0.0359
07:01-08:00, Mon., 02 Sep. 0.0381 0.0339 0.0358
06:01-07:00, Mon., 02 Sep. 0.0379 0.0334 0.0358
05:01-06:00, Mon., 02 Sep. 0.0373 0.0333 0.0354
04:01-05:00, Mon., 02 Sep. 0.0387 0.0321 0.0357
03:01-04:00, Mon., 02 Sep. 0.0375 0.0328 0.0352
02:01-03:00, Mon., 02 Sep. 0.0372 0.0336 0.0354
01:01-02:00, Mon., 02 Sep. 0.0390 0.0335 0.0361
00:01-01:00, Mon., 02 Sep. 0.0407 0.0339 0.0368
23:01-24:00, Sun., 01 Sep. 0.0438 0.0363 0.0404
22:01-23:00, Sun., 01 Sep. 0.0464 0.0363 0.0406
21:01-22:00, Sun., 01 Sep. 0.0412 0.0341 0.0364
20:01-21:00, Sun., 01 Sep. 0.0384 0.0342 0.0360
19:01-20:00, Sun., 01 Sep. 0.0379 0.0345 0.0361
18:01-19:00, Sun., 01 Sep. 0.0394 0.0330 0.0360
17:01-18:00, Sun., 01 Sep. 0.0374 0.0329 0.0358
16:01-17:00, Sun., 01 Sep. 0.0379 0.0342 0.0359
15:01-16:00, Sun., 01 Sep. 0.0376 0.0344 0.0361
14:01-15:00, Sun., 01 Sep. 0.0419 0.0353 0.0383
13:01-14:00, Sun., 01 Sep. 0.0444 0.0364 0.0401
12:01-13:00, Sun., 01 Sep. 0.0423 0.0352 0.0375
11:01-12:00, Sun., 01 Sep. 0.0414 0.0338 0.0373
10:01-11:00, Sun., 01 Sep. 0.0390 0.0334 0.0360
09:01-10:00, Sun., 01 Sep. 0.0375 0.0340 0.0358
08:01-09:00, Sun., 01 Sep. 0.0398 0.0338 0.0360
07:01-08:00, Sun., 01 Sep. 0.0393 0.0337 0.0358
06:01-07:00, Sun., 01 Sep. 0.0383 0.0336 0.0357
05:01-06:00, Sun., 01 Sep. 0.0378 0.0331 0.0358
04:01-05:00, Sun., 01 Sep. 0.0395 0.0337 0.0358
03:01-04:00, Sun., 01 Sep. 0.0399 0.0346 0.0367
02:01-03:00, Sun., 01 Sep. 0.0393 0.0342 0.0363
01:01-02:00, Sun., 01 Sep. 0.0398 0.0332 0.0366
00:01-01:00, Sun., 01 Sep. 0.0424 0.0349 0.0391
23:01-24:00, Sat., 31 Aug. 0.0404 0.0335 0.0364
22:01-23:00, Sat., 31 Aug. 0.0401 0.0355 0.0374
21:01-22:00, Sat., 31 Aug. 0.0418 0.0348 0.0374
20:01-21:00, Sat., 31 Aug. 0.0453 0.0360 0.0396
19:01-20:00, Sat., 31 Aug. 0.0456 0.0363 0.0399
18:01-19:00, Sat., 31 Aug. 0.0446 0.0363 0.0410
17:01-18:00, Sat., 31 Aug. 0.0390 0.0336 0.0364
16:01-17:00, Sat., 31 Aug. 0.0381 0.0337 0.0358
15:01-16:00, Sat., 31 Aug. 0.0391 0.0338 0.0360
12:01-13:00, Sat., 31 Aug. 0.0371 0.0338 0.0355
11:01-12:00, Sat., 31 Aug. 0.0396 0.0336 0.0355
10:01-11:00, Sat., 31 Aug. 0.0384 0.0335 0.0358
09:01-10:00, Sat., 31 Aug. 0.0385 0.0341 0.0358
08:01-09:00, Sat., 31 Aug. 0.0389 0.0336 0.0357
07:01-08:00, Sat., 31 Aug. 0.0381 0.0341 0.0361
06:01-07:00, Sat., 31 Aug. 0.0402 0.0348 0.0369
05:01-06:00, Sat., 31 Aug. 0.0402 0.0346 0.0363
04:01-05:00, Sat., 31 Aug. 0.0397 0.0343 0.0367
03:01-04:00, Sat., 31 Aug. 0.0407 0.0353 0.0372
02:01-03:00, Sat., 31 Aug. 0.0425 0.0345 0.0377
01:01-02:00, Sat., 31 Aug. 0.0433 0.0364 0.0393
00:01-01:00, Sat., 31 Aug. 0.0388 0.0338 0.0360
23:01-24:00, Fri., 30 Aug. 0.0392 0.0337 0.0356
22:01-23:00, Fri., 30 Aug. 0.0383 0.0334 0.0355
21:01-22:00, Fri., 30 Aug. 0.0377 0.0340 0.0359
20:01-21:00, Fri., 30 Aug. 0.0403 0.0339 0.0360
19:01-20:00, Fri., 30 Aug. 0.0380 0.0333 0.0354
18:01-19:00, Fri., 30 Aug. 0.0376 0.0333 0.0356
17:01-18:00, Fri., 30 Aug. 0.0379 0.0332 0.0355
16:01-17:00, Fri., 30 Aug. 0.0408 0.0337 0.0358
15:01-16:00, Fri., 30 Aug. 0.0396 0.0340 0.0361
14:01-15:00, Fri., 30 Aug. 0.0399 0.0342 0.0367
13:01-14:00, Fri., 30 Aug. 0.0400 0.0341 0.0367
12:01-13:00, Fri., 30 Aug. 0.0414 0.0357 0.0380
11:01-12:00, Fri., 30 Aug. 0.0423 0.0364 0.0394
10:01-11:00, Fri., 30 Aug. 0.0445 0.0377 0.0410
09:01-10:00, Fri., 30 Aug. 0.0437 0.0373 0.0402
08:01-09:00, Fri., 30 Aug. 0.0439 0.0364 0.0397
07:01-08:00, Fri., 30 Aug. 0.0434 0.0360 0.0384
06:01-07:00, Fri., 30 Aug. 0.0410 0.0350 0.0371
05:01-06:00, Fri., 30 Aug. 0.0406 0.0345 0.0370
04:01-05:00, Fri., 30 Aug. 0.0388 0.0341 0.0364
03:01-04:00, Fri., 30 Aug. 0.0416 0.0341 0.0368
02:01-03:00, Fri., 30 Aug. 0.0382 0.0343 0.0361
01:01-02:00, Fri., 30 Aug. 0.0407 0.0346 0.0372
00:01-01:00, Fri., 30 Aug. 0.0406 0.0358 0.0374
23:01-24:00, Thu., 29 Aug. 0.0413 0.0340 0.0369
22:01-23:00, Thu., 29 Aug. 0.0388 0.0342 0.0365
21:01-22:00, Thu., 29 Aug. 0.0407 0.0340 0.0366
20:01-21:00, Thu., 29 Aug. 0.0375 0.0338 0.0359
19:01-20:00, Thu., 29 Aug. 0.0393 0.0337 0.0357
18:01-19:00, Thu., 29 Aug. 0.0380 0.0334 0.0358
17:01-18:00, Thu., 29 Aug. 0.0389 0.0339 0.0362
16:01-17:00, Thu., 29 Aug. 0.0383 0.0334 0.0357
15:01-16:00, Thu., 29 Aug. 0.0397 0.0336 0.0362
14:01-15:00, Thu., 29 Aug. 0.0381 0.0332 0.0356
13:01-14:00, Thu., 29 Aug. 0.0373 0.0343 0.0359
11:01-12:00, Thu., 29 Aug. 0.0353 0.0353 0.0353
10:01-11:00, Thu., 29 Aug. 0.0384 0.0338 0.0358
09:01-10:00, Thu., 29 Aug. 0.0395 0.0338 0.0360
08:01-09:00, Thu., 29 Aug. 0.0373 0.0331 0.0354
07:01-08:00, Thu., 29 Aug. 0.0371 0.0340 0.0356
06:01-07:00, Thu., 29 Aug. 0.0392 0.0334 0.0356
05:01-06:00, Thu., 29 Aug. 0.0373 0.0335 0.0357
04:01-05:00, Thu., 29 Aug. 0.0393 0.0338 0.0358
03:01-04:00, Thu., 29 Aug. 0.0376 0.0332 0.0357
02:01-03:00, Thu., 29 Aug. 0.0393 0.0334 0.0359
01:01-02:00, Thu., 29 Aug. 0.0378 0.0339 0.0357
00:01-01:00, Thu., 29 Aug. 0.0373 0.0332 0.0353
23:01-24:00, Wed., 28 Aug. 0.0388 0.0336 0.0354
22:01-23:00, Wed., 28 Aug. 0.0375 0.0329 0.0353
21:01-22:00, Wed., 28 Aug. 0.0372 0.0331 0.0355
20:01-21:00, Wed., 28 Aug. 0.0372 0.0329 0.0355
19:01-20:00, Wed., 28 Aug. 0.0380 0.0330 0.0355
18:01-19:00, Wed., 28 Aug. 0.0381 0.0338 0.0359
17:01-18:00, Wed., 28 Aug. 0.0381 0.0331 0.0356
16:01-17:00, Wed., 28 Aug. 0.0393 0.0335 0.0354
11:01-12:00, Wed., 28 Aug. 0.0377 0.0333 0.0353
10:01-11:00, Wed., 28 Aug. 0.0381 0.0336 0.0357
09:01-10:00, Wed., 28 Aug. 0.0376 0.0339 0.0358
08:01-09:00, Wed., 28 Aug. 0.0394 0.0334 0.0359
07:01-08:00, Wed., 28 Aug. 0.0388 0.0334 0.0356
06:01-07:00, Wed., 28 Aug. 0.0379 0.0334 0.0356
05:01-06:00, Wed., 28 Aug. 0.0388 0.0338 0.0357
04:01-05:00, Wed., 28 Aug. 0.0401 0.0336 0.0355
03:01-04:00, Wed., 28 Aug. 0.0376 0.0334 0.0356
02:01-03:00, Wed., 28 Aug. 0.0391 0.0331 0.0355
01:01-02:00, Wed., 28 Aug. 0.0374 0.0329 0.0356
00:01-01:00, Wed., 28 Aug. 0.0383 0.0327 0.0355
23:01-24:00, Tue., 27 Aug. 0.0372 0.0337 0.0355
22:01-23:00, Tue., 27 Aug. 0.0387 0.0335 0.0353
21:01-22:00, Tue., 27 Aug. 0.0378 0.0326 0.0354
20:01-21:00, Tue., 27 Aug. 0.0373 0.0331 0.0356
19:01-20:00, Tue., 27 Aug. 0.0392 0.0334 0.0357
18:01-19:00, Tue., 27 Aug. 0.0376 0.0312 0.0355
17:01-18:00, Tue., 27 Aug. 0.0378 0.0331 0.0356
16:01-17:00, Tue., 27 Aug. 0.0372 0.0333 0.0353
15:01-16:00, Tue., 27 Aug. 0.0385 0.0334 0.0350
14:01-15:00, Tue., 27 Aug. 0.0382 0.0337 0.0353
13:01-14:00, Tue., 27 Aug. 0.0395 0.0330 0.0356
12:01-13:00, Tue., 27 Aug. 0.0417 0.0335 0.0356
11:01-12:00, Tue., 27 Aug. 0.0377 0.0331 0.0353
10:01-11:00, Tue., 27 Aug. 0.0389 0.0322 0.0354
09:01-10:00, Tue., 27 Aug. 0.0384 0.0339 0.0358
08:01-09:00, Tue., 27 Aug. 0.0392 0.0339 0.0358
07:01-08:00, Tue., 27 Aug. 0.0380 0.0331 0.0354
06:01-07:00, Tue., 27 Aug. 0.0375 0.0337 0.0355
05:01-06:00, Tue., 27 Aug. 0.0391 0.0327 0.0353
04:01-05:00, Tue., 27 Aug. 0.0387 0.0343 0.0359
03:01-04:00, Tue., 27 Aug. 0.0388 0.0333 0.0357
02:01-03:00, Tue., 27 Aug. 0.0373 0.0340 0.0359
01:01-02:00, Tue., 27 Aug. 0.0377 0.0342 0.0359
00:01-01:00, Tue., 27 Aug. 0.0373 0.0335 0.0357
23:01-24:00, Mon., 26 Aug. 0.0400 0.0326 0.0359
22:01-23:00, Mon., 26 Aug. 0.0386 0.0330 0.0357
21:01-22:00, Mon., 26 Aug. 0.0387 0.0330 0.0359
20:01-21:00, Mon., 26 Aug. 0.0376 0.0337 0.0357
19:01-20:00, Mon., 26 Aug. 0.0399 0.0333 0.0358
18:01-19:00, Mon., 26 Aug. 0.0381 0.0341 0.0358
17:01-18:00, Mon., 26 Aug. 0.0377 0.0341 0.0357
08:01-09:00, Mon., 26 Aug. 0.0377 0.0343 0.0358
07:01-08:00, Mon., 26 Aug. 0.0382 0.0335 0.0359
06:01-07:00, Mon., 26 Aug. 0.0398 0.0341 0.0360
05:01-06:00, Mon., 26 Aug. 0.0388 0.0325 0.0357
04:01-05:00, Mon., 26 Aug. 0.0381 0.0337 0.0358
03:01-04:00, Mon., 26 Aug. 0.0388 0.0339 0.0359
02:01-03:00, Mon., 26 Aug. 0.0380 0.0340 0.0359
01:01-02:00, Mon., 26 Aug. 0.0381 0.0339 0.0358
00:01-01:00, Mon., 26 Aug. 0.0375 0.0339 0.0358
23:01-24:00, Sun., 25 Aug. 0.0383 0.0343 0.0358
22:01-23:00, Sun., 25 Aug. 0.0393 0.0342 0.0358
21:01-22:00, Sun., 25 Aug. 0.0382 0.0337 0.0357
20:01-21:00, Sun., 25 Aug. 0.0382 0.0330 0.0357
19:01-20:00, Sun., 25 Aug. 0.0375 0.0336 0.0357
18:01-19:00, Sun., 25 Aug. 0.0386 0.0325 0.0357
17:01-18:00, Sun., 25 Aug. 0.0375 0.0337 0.0357
09:01-10:00, Sun., 25 Aug. 0.0381 0.0346 0.0362
08:01-09:00, Sun., 25 Aug. 0.0380 0.0340 0.0359
07:01-08:00, Sun., 25 Aug. 0.0396 0.0342 0.0362
06:01-07:00, Sun., 25 Aug. 0.0400 0.0338 0.0360
05:01-06:00, Sun., 25 Aug. 0.0380 0.0336 0.0361