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
06:01-07:00, Thu., 02 May. 0.0404 0.0339 0.0362
05:01-06:00, Thu., 02 May. 0.0424 0.0354 0.0386
04:01-05:00, Thu., 02 May. 0.0468 0.0392 0.0425
03:01-04:00, Thu., 02 May. 0.0461 0.0384 0.0424
02:01-03:00, Thu., 02 May. 0.0458 0.0373 0.0422
01:01-02:00, Thu., 02 May. 0.0487 0.0411 0.0454
00:01-01:00, Thu., 02 May. 0.0492 0.0425 0.0463
23:01-24:00, Wed., 01 May. 0.0532 0.0410 0.0477
22:01-23:00, Wed., 01 May. 0.0536 0.0426 0.0474
21:01-22:00, Wed., 01 May. 0.0551 0.0453 0.0499
20:01-21:00, Wed., 01 May. 0.0545 0.0455 0.0500
19:01-20:00, Wed., 01 May. 0.0566 0.0470 0.0519
18:01-19:00, Wed., 01 May. 0.0553 0.0443 0.0495
17:01-18:00, Wed., 01 May. 0.0557 0.0486 0.0520
16:01-17:00, Wed., 01 May. 0.0599 0.0510 0.0551
15:01-16:00, Wed., 01 May. 0.0621 0.0539 0.0579
14:01-15:00, Wed., 01 May. 0.0654 0.0554 0.0609
13:01-14:00, Wed., 01 May. 0.0656 0.0485 0.0564
12:01-13:00, Wed., 01 May. 0.0513 0.0428 0.0473
11:01-12:00, Wed., 01 May. 0.0478 0.0401 0.0440
10:01-11:00, Wed., 01 May. 0.0432 0.0351 0.0389
09:01-10:00, Wed., 01 May. 0.0374 0.0343 0.0360
08:01-09:00, Wed., 01 May. 0.0405 0.0352 0.0370
07:01-08:00, Wed., 01 May. 0.0393 0.0347 0.0367
06:01-07:00, Wed., 01 May. 0.0400 0.0344 0.0366
05:01-06:00, Wed., 01 May. 0.0399 0.0340 0.0367
04:01-05:00, Wed., 01 May. 0.0389 0.0337 0.0364
03:01-04:00, Wed., 01 May. 0.0402 0.0341 0.0366
02:01-03:00, Wed., 01 May. 0.0382 0.0339 0.0362
01:01-02:00, Wed., 01 May. 0.0389 0.0338 0.0360
00:01-01:00, Wed., 01 May. 0.0384 0.0336 0.0359
23:01-24:00, Tue., 30 Apr. 0.0387 0.0329 0.0357
22:01-23:00, Tue., 30 Apr. 0.0384 0.0337 0.0358
21:01-22:00, Tue., 30 Apr. 0.0395 0.0328 0.0357
20:01-21:00, Tue., 30 Apr. 0.0391 0.0340 0.0361
19:01-20:00, Tue., 30 Apr. 0.0402 0.0332 0.0359
18:01-19:00, Tue., 30 Apr. 0.0385 0.0339 0.0357
17:01-18:00, Tue., 30 Apr. 0.0398 0.0338 0.0357
16:01-17:00, Tue., 30 Apr. 0.0390 0.0343 0.0360
15:01-16:00, Tue., 30 Apr. 0.0379 0.0344 0.0358
14:01-15:00, Tue., 30 Apr. 0.0381 0.0333 0.0356
13:01-14:00, Tue., 30 Apr. 0.0390 0.0332 0.0357
12:01-13:00, Tue., 30 Apr. 0.0386 0.0333 0.0359
11:01-12:00, Tue., 30 Apr. 0.0389 0.0342 0.0364
10:01-11:00, Tue., 30 Apr. 0.0399 0.0340 0.0370
09:01-10:00, Tue., 30 Apr. 0.0392 0.0347 0.0365
08:01-09:00, Tue., 30 Apr. 0.0393 0.0337 0.0362
07:01-08:00, Tue., 30 Apr. 0.0403 0.0338 0.0367
06:01-07:00, Tue., 30 Apr. 0.0445 0.0357 0.0397
05:01-06:00, Tue., 30 Apr. 0.0447 0.0353 0.0395
04:01-05:00, Tue., 30 Apr. 0.0395 0.0343 0.0363
03:01-04:00, Tue., 30 Apr. 0.0400 0.0343 0.0363
02:01-03:00, Tue., 30 Apr. 0.0414 0.0346 0.0368
01:01-02:00, Tue., 30 Apr. 0.0390 0.0338 0.0363
00:01-01:00, Tue., 30 Apr. 0.0388 0.0339 0.0364
23:01-24:00, Mon., 29 Apr. 0.0381 0.0324 0.0358
22:01-23:00, Mon., 29 Apr. 0.0372 0.0339 0.0358
21:01-22:00, Mon., 29 Apr. 0.0383 0.0330 0.0357
20:01-21:00, Mon., 29 Apr. 0.0379 0.0333 0.0357
19:01-20:00, Mon., 29 Apr. 0.0401 0.0332 0.0357
18:01-19:00, Mon., 29 Apr. 0.0387 0.0339 0.0358
17:01-18:00, Mon., 29 Apr. 0.0386 0.0334 0.0358
16:01-17:00, Mon., 29 Apr. 0.0390 0.0342 0.0362
15:01-16:00, Mon., 29 Apr. 0.0403 0.0346 0.0361
14:01-15:00, Mon., 29 Apr. 0.0392 0.0334 0.0358
13:01-14:00, Mon., 29 Apr. 0.0387 0.0337 0.0361
12:01-13:00, Mon., 29 Apr. 0.0396 0.0338 0.0363
11:01-12:00, Mon., 29 Apr. 0.0388 0.0341 0.0362
10:01-11:00, Mon., 29 Apr. 0.0393 0.0334 0.0362
09:01-10:00, Mon., 29 Apr. 0.0393 0.0342 0.0365
08:01-09:00, Mon., 29 Apr. 0.0384 0.0343 0.0361
07:01-08:00, Mon., 29 Apr. 0.0395 0.0345 0.0363
06:01-07:00, Mon., 29 Apr. 0.0393 0.0341 0.0362
05:01-06:00, Mon., 29 Apr. 0.0385 0.0339 0.0359
04:01-05:00, Mon., 29 Apr. 0.0390 0.0345 0.0362
03:01-04:00, Mon., 29 Apr. 0.0384 0.0328 0.0360
02:01-03:00, Mon., 29 Apr. 0.0391 0.0342 0.0361
01:01-02:00, Mon., 29 Apr. 0.0377 0.0335 0.0357
00:01-01:00, Mon., 29 Apr. 0.0385 0.0337 0.0359
23:01-24:00, Sun., 28 Apr. 0.0370 0.0339 0.0358
22:01-23:00, Sun., 28 Apr. 0.0385 0.0338 0.0362
21:01-22:00, Sun., 28 Apr. 0.0380 0.0345 0.0360
20:01-21:00, Sun., 28 Apr. 0.0385 0.0339 0.0358
19:01-20:00, Sun., 28 Apr. 0.0384 0.0340 0.0359
18:01-19:00, Sun., 28 Apr. 0.0382 0.0332 0.0361
17:01-18:00, Sun., 28 Apr. 0.0388 0.0339 0.0361
16:01-17:00, Sun., 28 Apr. 0.0385 0.0344 0.0363
15:01-16:00, Sun., 28 Apr. 0.0385 0.0339 0.0360
14:01-15:00, Sun., 28 Apr. 0.0384 0.0334 0.0361
13:01-14:00, Sun., 28 Apr. 0.0402 0.0335 0.0362
12:01-13:00, Sun., 28 Apr. 0.0389 0.0332 0.0360
11:01-12:00, Sun., 28 Apr. 0.0388 0.0336 0.0363
10:01-11:00, Sun., 28 Apr. 0.0383 0.0343 0.0362
09:01-10:00, Sun., 28 Apr. 0.0389 0.0345 0.0365
08:01-09:00, Sun., 28 Apr. 0.0394 0.0346 0.0366
07:01-08:00, Sun., 28 Apr. 0.0403 0.0340 0.0364
06:01-07:00, Sun., 28 Apr. 0.0394 0.0341 0.0362
05:01-06:00, Sun., 28 Apr. 0.0378 0.0342 0.0360
04:01-05:00, Sun., 28 Apr. 0.0381 0.0337 0.0359
03:01-04:00, Sun., 28 Apr. 0.0371 0.0339 0.0358
02:01-03:00, Sun., 28 Apr. 0.0370 0.0329 0.0355
01:01-02:00, Sun., 28 Apr. 0.0396 0.0335 0.0357
00:01-01:00, Sun., 28 Apr. 0.0382 0.0335 0.0359
23:01-24:00, Sat., 27 Apr. 0.0378 0.0337 0.0355
22:01-23:00, Sat., 27 Apr. 0.0374 0.0327 0.0357
21:01-22:00, Sat., 27 Apr. 0.0380 0.0334 0.0354
20:01-21:00, Sat., 27 Apr. 0.0398 0.0332 0.0359
19:01-20:00, Sat., 27 Apr. 0.0379 0.0346 0.0359
18:01-19:00, Sat., 27 Apr. 0.0389 0.0332 0.0356
17:01-18:00, Sat., 27 Apr. 0.0381 0.0335 0.0357
16:01-17:00, Sat., 27 Apr. 0.0383 0.0340 0.0358
15:01-16:00, Sat., 27 Apr. 0.0390 0.0338 0.0359
14:01-15:00, Sat., 27 Apr. 0.0375 0.0338 0.0357
13:01-14:00, Sat., 27 Apr. 0.0396 0.0339 0.0361
12:01-13:00, Sat., 27 Apr. 0.0382 0.0339 0.0359
11:01-12:00, Sat., 27 Apr. 0.0396 0.0343 0.0365
10:01-11:00, Sat., 27 Apr. 0.0405 0.0347 0.0375
09:01-10:00, Sat., 27 Apr. 0.0396 0.0350 0.0373
08:01-09:00, Sat., 27 Apr. 0.0425 0.0354 0.0383
07:01-08:00, Sat., 27 Apr. 0.0421 0.0357 0.0380
06:01-07:00, Sat., 27 Apr. 0.0414 0.0356 0.0373
05:01-06:00, Sat., 27 Apr. 0.0396 0.0335 0.0363
04:01-05:00, Sat., 27 Apr. 0.0376 0.0338 0.0358
03:01-04:00, Sat., 27 Apr. 0.0383 0.0329 0.0359
02:01-03:00, Sat., 27 Apr. 0.0388 0.0340 0.0359
01:01-02:00, Sat., 27 Apr. 0.0380 0.0336 0.0358
00:01-01:00, Sat., 27 Apr. 0.0411 0.0337 0.0360
23:01-24:00, Fri., 26 Apr. 0.0384 0.0338 0.0358
22:01-23:00, Fri., 26 Apr. 0.0394 0.0335 0.0360
21:01-22:00, Fri., 26 Apr. 0.0392 0.0337 0.0357
20:01-21:00, Fri., 26 Apr. 0.0387 0.0341 0.0359
19:01-20:00, Fri., 26 Apr. 0.0383 0.0342 0.0359
18:01-19:00, Fri., 26 Apr. 0.0385 0.0336 0.0361
17:01-18:00, Fri., 26 Apr. 0.0388 0.0339 0.0358
16:01-17:00, Fri., 26 Apr. 0.0379 0.0334 0.0357
15:01-16:00, Fri., 26 Apr. 0.0374 0.0345 0.0358
14:01-15:00, Fri., 26 Apr. 0.0379 0.0342 0.0359
13:01-14:00, Fri., 26 Apr. 0.0385 0.0339 0.0361
12:01-13:00, Fri., 26 Apr. 0.0401 0.0338 0.0356
11:01-12:00, Fri., 26 Apr. 0.0387 0.0335 0.0356
10:01-11:00, Fri., 26 Apr. 0.0381 0.0337 0.0357
09:01-10:00, Fri., 26 Apr. 0.0408 0.0339 0.0362
08:01-09:00, Fri., 26 Apr. 0.0400 0.0337 0.0360
07:01-08:00, Fri., 26 Apr. 0.0389 0.0339 0.0361
06:01-07:00, Fri., 26 Apr. 0.0386 0.0332 0.0361
05:01-06:00, Fri., 26 Apr. 0.0391 0.0335 0.0361
04:01-05:00, Fri., 26 Apr. 0.0384 0.0340 0.0363
03:01-04:00, Fri., 26 Apr. 0.0401 0.0343 0.0362
02:01-03:00, Fri., 26 Apr. 0.0386 0.0343 0.0359
01:01-02:00, Fri., 26 Apr. 0.0371 0.0340 0.0360
00:01-01:00, Fri., 26 Apr. 0.0395 0.0331 0.0359
23:01-24:00, Thu., 25 Apr. 0.0388 0.0338 0.0360
22:01-23:00, Thu., 25 Apr. 0.0392 0.0337 0.0360
21:01-22:00, Thu., 25 Apr. 0.0391 0.0337 0.0358
20:01-21:00, Thu., 25 Apr. 0.0407 0.0338 0.0359
19:01-20:00, Thu., 25 Apr. 0.0395 0.0335 0.0356
18:01-19:00, Thu., 25 Apr. 0.0382 0.0336 0.0357
17:01-18:00, Thu., 25 Apr. 0.0372 0.0341 0.0358
16:01-17:00, Thu., 25 Apr. 0.0396 0.0333 0.0357
15:01-16:00, Thu., 25 Apr. 0.0392 0.0320 0.0354
14:01-15:00, Thu., 25 Apr. 0.0369 0.0341 0.0357
13:01-14:00, Thu., 25 Apr. 0.0376 0.0340 0.0357
12:01-13:00, Thu., 25 Apr. 0.0382 0.0337 0.0357
11:01-12:00, Thu., 25 Apr. 0.0369 0.0332 0.0354
10:01-11:00, Thu., 25 Apr. 0.0385 0.0332 0.0355
09:01-10:00, Thu., 25 Apr. 0.0372 0.0340 0.0356
08:01-09:00, Thu., 25 Apr. 0.0381 0.0333 0.0356
07:01-08:00, Thu., 25 Apr. 0.0384 0.0330 0.0356
06:01-07:00, Thu., 25 Apr. 0.0372 0.0334 0.0354
05:01-06:00, Thu., 25 Apr. 0.0376 0.0328 0.0352
04:01-05:00, Thu., 25 Apr. 0.0368 0.0334 0.0352
03:01-04:00, Thu., 25 Apr. 0.0375 0.0334 0.0354
02:01-03:00, Thu., 25 Apr. 0.0372 0.0332 0.0354
01:01-02:00, Thu., 25 Apr. 0.0392 0.0343 0.0361
00:01-01:00, Thu., 25 Apr. 0.0406 0.0347 0.0369
23:01-24:00, Wed., 24 Apr. 0.0438 0.0366 0.0387
22:01-23:00, Wed., 24 Apr. 0.0426 0.0359 0.0396
21:01-22:00, Wed., 24 Apr. 0.0436 0.0363 0.0393
20:01-21:00, Wed., 24 Apr. 0.0438 0.0360 0.0396
19:01-20:00, Wed., 24 Apr. 0.0422 0.0360 0.0390
18:01-19:00, Wed., 24 Apr. 0.0424 0.0354 0.0391
17:01-18:00, Wed., 24 Apr. 0.0421 0.0346 0.0381
16:01-17:00, Wed., 24 Apr. 0.0417 0.0352 0.0372
15:01-16:00, Wed., 24 Apr. 0.0397 0.0354 0.0369
14:01-15:00, Wed., 24 Apr. 0.0424 0.0355 0.0379
13:01-14:00, Wed., 24 Apr. 0.0436 0.0370 0.0402
12:01-13:00, Wed., 24 Apr. 0.0429 0.0351 0.0384
11:01-12:00, Wed., 24 Apr. 0.0408 0.0351 0.0374
10:01-11:00, Wed., 24 Apr. 0.0406 0.0351 0.0370
09:01-10:00, Wed., 24 Apr. 0.0393 0.0342 0.0369
08:01-09:00, Wed., 24 Apr. 0.0404 0.0346 0.0371
07:01-08:00, Wed., 24 Apr. 0.0432 0.0359 0.0391
06:01-07:00, Wed., 24 Apr. 0.0446 0.0381 0.0417
05:01-06:00, Wed., 24 Apr. 0.0430 0.0368 0.0401
04:01-05:00, Wed., 24 Apr. 0.0414 0.0345 0.0373
03:01-04:00, Wed., 24 Apr. 0.0374 0.0331 0.0357
02:01-03:00, Wed., 24 Apr. 0.0383 0.0338 0.0356
01:01-02:00, Wed., 24 Apr. 0.0386 0.0335 0.0355
00:01-01:00, Wed., 24 Apr. 0.0377 0.0333 0.0357
23:01-24:00, Tue., 23 Apr. 0.0376 0.0334 0.0351
22:01-23:00, Tue., 23 Apr. 0.0382 0.0338 0.0357
21:01-22:00, Tue., 23 Apr. 0.0381 0.0333 0.0357
20:01-21:00, Tue., 23 Apr. 0.0377 0.0333 0.0356
19:01-20:00, Tue., 23 Apr. 0.0372 0.0339 0.0355
18:01-19:00, Tue., 23 Apr. 0.0393 0.0341 0.0358
17:01-18:00, Tue., 23 Apr. 0.0394 0.0343 0.0363
16:01-17:00, Tue., 23 Apr. 0.0392 0.0341 0.0362
15:01-16:00, Tue., 23 Apr. 0.0374 0.0339 0.0357
14:01-15:00, Tue., 23 Apr. 0.0380 0.0337 0.0359
13:01-14:00, Tue., 23 Apr. 0.0374 0.0337 0.0357
12:01-13:00, Tue., 23 Apr. 0.0380 0.0337 0.0357
11:01-12:00, Tue., 23 Apr. 0.0380 0.0337 0.0356
10:01-11:00, Tue., 23 Apr. 0.0387 0.0336 0.0359
09:01-10:00, Tue., 23 Apr. 0.0388 0.0328 0.0355
08:01-09:00, Tue., 23 Apr. 0.0378 0.0334 0.0357
07:01-08:00, Tue., 23 Apr. 0.0377 0.0326 0.0357
06:01-07:00, Tue., 23 Apr. 0.0379 0.0340 0.0360
05:01-06:00, Tue., 23 Apr. 0.0387 0.0338 0.0358
04:01-05:00, Tue., 23 Apr. 0.0393 0.0337 0.0354
03:01-04:00, Tue., 23 Apr. 0.0373 0.0336 0.0356
02:01-03:00, Tue., 23 Apr. 0.0389 0.0335 0.0355
01:01-02:00, Tue., 23 Apr. 0.0379 0.0337 0.0357
00:01-01:00, Tue., 23 Apr. 0.0391 0.0335 0.0354
23:01-24:00, Mon., 22 Apr. 0.0385 0.0339 0.0356
22:01-23:00, Mon., 22 Apr. 0.0371 0.0338 0.0355
21:01-22:00, Mon., 22 Apr. 0.0377 0.0339 0.0357
20:01-21:00, Mon., 22 Apr. 0.0377 0.0331 0.0354
19:01-20:00, Mon., 22 Apr. 0.0392 0.0336 0.0357
18:01-19:00, Mon., 22 Apr. 0.0382 0.0329 0.0354
17:01-18:00, Mon., 22 Apr. 0.0374 0.0329 0.0355
16:01-17:00, Mon., 22 Apr. 0.0370 0.0335 0.0353
15:01-16:00, Mon., 22 Apr. 0.0393 0.0343 0.0360
14:01-15:00, Mon., 22 Apr. 0.0371 0.0341 0.0358
13:01-14:00, Mon., 22 Apr. 0.0408 0.0340 0.0358
12:01-13:00, Mon., 22 Apr. 0.0396 0.0333 0.0358
11:01-12:00, Mon., 22 Apr. 0.0382 0.0339 0.0362
10:01-11:00, Mon., 22 Apr. 0.0413 0.0344 0.0371
09:01-10:00, Mon., 22 Apr. 0.0433 0.0364 0.0394
08:01-09:00, Mon., 22 Apr. 0.0436 0.0371 0.0405
07:01-08:00, Mon., 22 Apr. 0.0439 0.0369 0.0406