Radiation doses in the air / Measurement results by the hour (Koto)

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
05:01-06:00, Sat., 07 Nov. 0.0383 0.0340 0.0365
04:01-05:00, Sat., 07 Nov. 0.0391 0.0343 0.0367
03:01-04:00, Sat., 07 Nov. 0.0384 0.0347 0.0368
02:01-03:00, Sat., 07 Nov. 0.0388 0.0348 0.0368
01:01-02:00, Sat., 07 Nov. 0.0390 0.0339 0.0366
00:01-01:00, Sat., 07 Nov. 0.0389 0.0350 0.0367
23:01-24:00, Fri., 06 Nov. 0.0389 0.0343 0.0365
22:01-23:00, Fri., 06 Nov. 0.0394 0.0340 0.0366
21:01-22:00, Fri., 06 Nov. 0.0379 0.0349 0.0365
20:01-21:00, Fri., 06 Nov. 0.0396 0.0333 0.0364
19:01-20:00, Fri., 06 Nov. 0.0382 0.0345 0.0364
18:01-19:00, Fri., 06 Nov. 0.0388 0.0347 0.0367
17:01-18:00, Fri., 06 Nov. 0.0389 0.0347 0.0365
16:01-17:00, Fri., 06 Nov. 0.0385 0.0347 0.0365
15:01-16:00, Fri., 06 Nov. 0.0388 0.0350 0.0366
14:01-15:00, Fri., 06 Nov. 0.0384 0.0338 0.0364
13:01-14:00, Fri., 06 Nov. 0.0392 0.0341 0.0363
12:01-13:00, Fri., 06 Nov. 0.0398 0.0340 0.0363
11:01-12:00, Fri., 06 Nov. 0.0384 0.0350 0.0364
10:01-11:00, Fri., 06 Nov. 0.0383 0.0344 0.0365
09:01-10:00, Fri., 06 Nov. 0.0391 0.0345 0.0367
08:01-09:00, Fri., 06 Nov. 0.0383 0.0347 0.0368
07:01-08:00, Fri., 06 Nov. 0.0398 0.0341 0.0367
06:01-07:00, Fri., 06 Nov. 0.0391 0.0343 0.0365
05:01-06:00, Fri., 06 Nov. 0.0387 0.0341 0.0364
04:01-05:00, Fri., 06 Nov. 0.0389 0.0338 0.0361
03:01-04:00, Fri., 06 Nov. 0.0378 0.0343 0.0362
02:01-03:00, Fri., 06 Nov. 0.0384 0.0336 0.0363
01:01-02:00, Fri., 06 Nov. 0.0381 0.0335 0.0362
00:01-01:00, Fri., 06 Nov. 0.0381 0.0347 0.0364
23:01-24:00, Thu., 05 Nov. 0.0379 0.0347 0.0366
22:01-23:00, Thu., 05 Nov. 0.0389 0.0338 0.0363
21:01-22:00, Thu., 05 Nov. 0.0387 0.0334 0.0361
20:01-21:00, Thu., 05 Nov. 0.0383 0.0342 0.0361
19:01-20:00, Thu., 05 Nov. 0.0385 0.0347 0.0362
18:01-19:00, Thu., 05 Nov. 0.0384 0.0336 0.0364
17:01-18:00, Thu., 05 Nov. 0.0383 0.0332 0.0357
16:01-17:00, Thu., 05 Nov. 0.0388 0.0343 0.0361
15:01-16:00, Thu., 05 Nov. 0.0382 0.0340 0.0360
14:01-15:00, Thu., 05 Nov. 0.0388 0.0348 0.0364
13:01-14:00, Thu., 05 Nov. 0.0389 0.0350 0.0367
12:01-13:00, Thu., 05 Nov. 0.0398 0.0352 0.0372
11:01-12:00, Thu., 05 Nov. 0.0404 0.0350 0.0383
10:01-11:00, Thu., 05 Nov. 0.0410 0.0368 0.0387
09:01-10:00, Thu., 05 Nov. 0.0418 0.0371 0.0391
08:01-09:00, Thu., 05 Nov. 0.0405 0.0367 0.0386
07:01-08:00, Thu., 05 Nov. 0.0443 0.0377 0.0406
06:01-07:00, Thu., 05 Nov. 0.0475 0.0416 0.0444
05:01-06:00, Thu., 05 Nov. 0.0464 0.0415 0.0441
04:01-05:00, Thu., 05 Nov. 0.0488 0.0432 0.0453
03:01-04:00, Thu., 05 Nov. 0.0475 0.0432 0.0457
02:01-03:00, Thu., 05 Nov. 0.0484 0.0415 0.0446
01:01-02:00, Thu., 05 Nov. 0.0483 0.0416 0.0448
00:01-01:00, Thu., 05 Nov. 0.0490 0.0421 0.0448
23:01-24:00, Wed., 04 Nov. 0.0480 0.0407 0.0438
22:01-23:00, Wed., 04 Nov. 0.0521 0.0443 0.0486
21:01-22:00, Wed., 04 Nov. 0.0552 0.0487 0.0521
20:01-21:00, Wed., 04 Nov. 0.0532 0.0440 0.0490
19:01-20:00, Wed., 04 Nov. 0.0472 0.0421 0.0448
18:01-19:00, Wed., 04 Nov. 0.0506 0.0438 0.0474
17:01-18:00, Wed., 04 Nov. 0.0521 0.0456 0.0492
16:01-17:00, Wed., 04 Nov. 0.0491 0.0416 0.0446
15:01-16:00, Wed., 04 Nov. 0.0476 0.0394 0.0436
14:01-15:00, Wed., 04 Nov. 0.0465 0.0398 0.0430
13:01-14:00, Wed., 04 Nov. 0.0416 0.0369 0.0396
12:01-13:00, Wed., 04 Nov. 0.0415 0.0336 0.0373
11:01-12:00, Wed., 04 Nov. 0.0389 0.0353 0.0369
10:01-11:00, Wed., 04 Nov. 0.0384 0.0351 0.0367
09:01-10:00, Wed., 04 Nov. 0.0383 0.0350 0.0367
08:01-09:00, Wed., 04 Nov. 0.0388 0.0346 0.0367
07:01-08:00, Wed., 04 Nov. 0.0384 0.0340 0.0366
06:01-07:00, Wed., 04 Nov. 0.0409 0.0344 0.0368
05:01-06:00, Wed., 04 Nov. 0.0384 0.0344 0.0365
04:01-05:00, Wed., 04 Nov. 0.0392 0.0338 0.0366
03:01-04:00, Wed., 04 Nov. 0.0388 0.0342 0.0366
02:01-03:00, Wed., 04 Nov. 0.0393 0.0348 0.0367
01:01-02:00, Wed., 04 Nov. 0.0392 0.0344 0.0364
00:01-01:00, Wed., 04 Nov. 0.0388 0.0342 0.0367
23:01-24:00, Tue., 03 Nov. 0.0390 0.0346 0.0366
22:01-23:00, Tue., 03 Nov. 0.0391 0.0349 0.0365
21:01-22:00, Tue., 03 Nov. 0.0385 0.0347 0.0365
20:01-21:00, Tue., 03 Nov. 0.0395 0.0343 0.0367
19:01-20:00, Tue., 03 Nov. 0.0389 0.0347 0.0366
18:01-19:00, Tue., 03 Nov. 0.0381 0.0347 0.0364
17:01-18:00, Tue., 03 Nov. 0.0389 0.0343 0.0365
16:01-17:00, Tue., 03 Nov. 0.0391 0.0346 0.0366
15:01-16:00, Tue., 03 Nov. 0.0388 0.0340 0.0365
14:01-15:00, Tue., 03 Nov. 0.0389 0.0346 0.0364
13:01-14:00, Tue., 03 Nov. 0.0389 0.0342 0.0365
12:01-13:00, Tue., 03 Nov. 0.0382 0.0344 0.0364
11:01-12:00, Tue., 03 Nov. 0.0389 0.0339 0.0364
10:01-11:00, Tue., 03 Nov. 0.0382 0.0335 0.0366
09:01-10:00, Tue., 03 Nov. 0.0389 0.0346 0.0364
08:01-09:00, Tue., 03 Nov. 0.0387 0.0336 0.0365
07:01-08:00, Tue., 03 Nov. 0.0384 0.0344 0.0365
06:01-07:00, Tue., 03 Nov. 0.0395 0.0350 0.0365
05:01-06:00, Tue., 03 Nov. 0.0395 0.0339 0.0370
04:01-05:00, Tue., 03 Nov. 0.0398 0.0344 0.0368
03:01-04:00, Tue., 03 Nov. 0.0387 0.0347 0.0367
02:01-03:00, Tue., 03 Nov. 0.0396 0.0347 0.0368
01:01-02:00, Tue., 03 Nov. 0.0387 0.0340 0.0365
00:01-01:00, Tue., 03 Nov. 0.0400 0.0348 0.0368
23:01-24:00, Mon., 02 Nov. 0.0395 0.0347 0.0366
22:01-23:00, Mon., 02 Nov. 0.0389 0.0346 0.0366
21:01-22:00, Mon., 02 Nov. 0.0389 0.0353 0.0370
20:01-21:00, Mon., 02 Nov. 0.0413 0.0343 0.0377
19:01-20:00, Mon., 02 Nov. 0.0464 0.0381 0.0414
18:01-19:00, Mon., 02 Nov. 0.0567 0.0442 0.0507
17:01-18:00, Mon., 02 Nov. 0.0588 0.0509 0.0553
16:01-17:00, Mon., 02 Nov. 0.0553 0.0444 0.0504
15:01-16:00, Mon., 02 Nov. 0.0481 0.0425 0.0456
14:01-15:00, Mon., 02 Nov. 0.0472 0.0425 0.0448
13:01-14:00, Mon., 02 Nov. 0.0460 0.0357 0.0413
12:01-13:00, Mon., 02 Nov. 0.0396 0.0353 0.0376
11:01-12:00, Mon., 02 Nov. 0.0408 0.0356 0.0374
10:01-11:00, Mon., 02 Nov. 0.0389 0.0347 0.0372
09:01-10:00, Mon., 02 Nov. 0.0389 0.0350 0.0371
08:01-09:00, Mon., 02 Nov. 0.0388 0.0346 0.0368
07:01-08:00, Mon., 02 Nov. 0.0395 0.0343 0.0370
06:01-07:00, Mon., 02 Nov. 0.0391 0.0349 0.0371
05:01-06:00, Mon., 02 Nov. 0.0388 0.0355 0.0373
04:01-05:00, Mon., 02 Nov. 0.0390 0.0351 0.0371
03:01-04:00, Mon., 02 Nov. 0.0398 0.0351 0.0372
02:01-03:00, Mon., 02 Nov. 0.0391 0.0348 0.0371
01:01-02:00, Mon., 02 Nov. 0.0394 0.0348 0.0370
00:01-01:00, Mon., 02 Nov. 0.0393 0.0347 0.0370
23:01-24:00, Sun., 01 Nov. 0.0391 0.0347 0.0369
22:01-23:00, Sun., 01 Nov. 0.0388 0.0347 0.0368
21:01-22:00, Sun., 01 Nov. 0.0390 0.0341 0.0366
20:01-21:00, Sun., 01 Nov. 0.0396 0.0344 0.0367
19:01-20:00, Sun., 01 Nov. 0.0386 0.0347 0.0367
18:01-19:00, Sun., 01 Nov. 0.0385 0.0353 0.0367
17:01-18:00, Sun., 01 Nov. 0.0393 0.0344 0.0369
16:01-17:00, Sun., 01 Nov. 0.0388 0.0350 0.0368
15:01-16:00, Sun., 01 Nov. 0.0393 0.0347 0.0369
14:01-15:00, Sun., 01 Nov. 0.0394 0.0350 0.0368
13:01-14:00, Sun., 01 Nov. 0.0388 0.0347 0.0369
12:01-13:00, Sun., 01 Nov. 0.0394 0.0350 0.0369
11:01-12:00, Sun., 01 Nov. 0.0384 0.0350 0.0368
10:01-11:00, Sun., 01 Nov. 0.0395 0.0346 0.0370
09:01-10:00, Sun., 01 Nov. 0.0400 0.0352 0.0371
08:01-09:00, Sun., 01 Nov. 0.0395 0.0350 0.0371
07:01-08:00, Sun., 01 Nov. 0.0395 0.0340 0.0370
06:01-07:00, Sun., 01 Nov. 0.0397 0.0350 0.0369
05:01-06:00, Sun., 01 Nov. 0.0392 0.0347 0.0367
04:01-05:00, Sun., 01 Nov. 0.0393 0.0347 0.0370
03:01-04:00, Sun., 01 Nov. 0.0388 0.0351 0.0369
02:01-03:00, Sun., 01 Nov. 0.0393 0.0350 0.0369
01:01-02:00, Sun., 01 Nov. 0.0388 0.0343 0.0367
00:01-01:00, Sun., 01 Nov. 0.0389 0.0349 0.0367
23:01-24:00, Sat., 31 Oct. 0.0395 0.0340 0.0367
22:01-23:00, Sat., 31 Oct. 0.0388 0.0347 0.0368
21:01-22:00, Sat., 31 Oct. 0.0382 0.0343 0.0365
20:01-21:00, Sat., 31 Oct. 0.0395 0.0345 0.0368
19:01-20:00, Sat., 31 Oct. 0.0390 0.0343 0.0365
18:01-19:00, Sat., 31 Oct. 0.0383 0.0342 0.0366
17:01-18:00, Sat., 31 Oct. 0.0379 0.0342 0.0364
16:01-17:00, Sat., 31 Oct. 0.0388 0.0350 0.0365
15:01-16:00, Sat., 31 Oct. 0.0388 0.0344 0.0366
14:01-15:00, Sat., 31 Oct. 0.0391 0.0346 0.0367
13:01-14:00, Sat., 31 Oct. 0.0388 0.0350 0.0369
12:01-13:00, Sat., 31 Oct. 0.0389 0.0349 0.0366
11:01-12:00, Sat., 31 Oct. 0.0392 0.0348 0.0371
10:01-11:00, Sat., 31 Oct. 0.0391 0.0352 0.0371
09:01-10:00, Sat., 31 Oct. 0.0393 0.0355 0.0374
08:01-09:00, Sat., 31 Oct. 0.0401 0.0351 0.0372
07:01-08:00, Sat., 31 Oct. 0.0392 0.0352 0.0371
06:01-07:00, Sat., 31 Oct. 0.0388 0.0358 0.0370
05:01-06:00, Sat., 31 Oct. 0.0388 0.0340 0.0369
04:01-05:00, Sat., 31 Oct. 0.0392 0.0354 0.0369
03:01-04:00, Sat., 31 Oct. 0.0392 0.0345 0.0370
02:01-03:00, Sat., 31 Oct. 0.0386 0.0336 0.0370
01:01-02:00, Sat., 31 Oct. 0.0391 0.0351 0.0370
00:01-01:00, Sat., 31 Oct. 0.0389 0.0342 0.0369
23:01-24:00, Fri., 30 Oct. 0.0391 0.0350 0.0368
22:01-23:00, Fri., 30 Oct. 0.0395 0.0349 0.0371
21:01-22:00, Fri., 30 Oct. 0.0385 0.0345 0.0368
20:01-21:00, Fri., 30 Oct. 0.0382 0.0347 0.0369
19:01-20:00, Fri., 30 Oct. 0.0390 0.0350 0.0368
18:01-19:00, Fri., 30 Oct. 0.0390 0.0348 0.0368
17:01-18:00, Fri., 30 Oct. 0.0389 0.0342 0.0366
16:01-17:00, Fri., 30 Oct. 0.0383 0.0346 0.0366
15:01-16:00, Fri., 30 Oct. 0.0381 0.0336 0.0366
14:01-15:00, Fri., 30 Oct. 0.0386 0.0343 0.0368
13:01-14:00, Fri., 30 Oct. 0.0385 0.0341 0.0367
12:01-13:00, Fri., 30 Oct. 0.0391 0.0340 0.0366
11:01-12:00, Fri., 30 Oct. 0.0392 0.0346 0.0365
10:01-11:00, Fri., 30 Oct. 0.0384 0.0336 0.0368
09:01-10:00, Fri., 30 Oct. 0.0391 0.0338 0.0368
08:01-09:00, Fri., 30 Oct. 0.0397 0.0355 0.0374
07:01-08:00, Fri., 30 Oct. 0.0416 0.0361 0.0386
06:01-07:00, Fri., 30 Oct. 0.0441 0.0375 0.0408
05:01-06:00, Fri., 30 Oct. 0.0402 0.0357 0.0379
04:01-05:00, Fri., 30 Oct. 0.0386 0.0337 0.0365
03:01-04:00, Fri., 30 Oct. 0.0381 0.0342 0.0365
02:01-03:00, Fri., 30 Oct. 0.0383 0.0343 0.0366
01:01-02:00, Fri., 30 Oct. 0.0382 0.0346 0.0366
00:01-01:00, Fri., 30 Oct. 0.0388 0.0338 0.0363
23:01-24:00, Thu., 29 Oct. 0.0390 0.0343 0.0364
22:01-23:00, Thu., 29 Oct. 0.0380 0.0343 0.0363
21:01-22:00, Thu., 29 Oct. 0.0381 0.0341 0.0363
20:01-21:00, Thu., 29 Oct. 0.0380 0.0338 0.0363
19:01-20:00, Thu., 29 Oct. 0.0393 0.0347 0.0366
18:01-19:00, Thu., 29 Oct. 0.0391 0.0347 0.0366
17:01-18:00, Thu., 29 Oct. 0.0388 0.0342 0.0363
16:01-17:00, Thu., 29 Oct. 0.0384 0.0343 0.0366
15:01-16:00, Thu., 29 Oct. 0.0384 0.0350 0.0366
14:01-15:00, Thu., 29 Oct. 0.0383 0.0352 0.0366
13:01-14:00, Thu., 29 Oct. 0.0386 0.0343 0.0365
12:01-13:00, Thu., 29 Oct. 0.0382 0.0343 0.0366
11:01-12:00, Thu., 29 Oct. 0.0393 0.0345 0.0364
10:01-11:00, Thu., 29 Oct. 0.0380 0.0343 0.0363
09:01-10:00, Thu., 29 Oct. 0.0388 0.0336 0.0364
08:01-09:00, Thu., 29 Oct. 0.0389 0.0342 0.0363
07:01-08:00, Thu., 29 Oct. 0.0388 0.0340 0.0364
06:01-07:00, Thu., 29 Oct. 0.0388 0.0340 0.0363
05:01-06:00, Thu., 29 Oct. 0.0391 0.0343 0.0362
04:01-05:00, Thu., 29 Oct. 0.0402 0.0349 0.0363
03:01-04:00, Thu., 29 Oct. 0.0388 0.0340 0.0362
02:01-03:00, Thu., 29 Oct. 0.0391 0.0340 0.0361
01:01-02:00, Thu., 29 Oct. 0.0380 0.0342 0.0362
00:01-01:00, Thu., 29 Oct. 0.0389 0.0346 0.0363
23:01-24:00, Wed., 28 Oct. 0.0387 0.0340 0.0363
22:01-23:00, Wed., 28 Oct. 0.0383 0.0339 0.0361
21:01-22:00, Wed., 28 Oct. 0.0385 0.0345 0.0363
20:01-21:00, Wed., 28 Oct. 0.0387 0.0347 0.0364
19:01-20:00, Wed., 28 Oct. 0.0390 0.0338 0.0361
18:01-19:00, Wed., 28 Oct. 0.0381 0.0343 0.0364
17:01-18:00, Wed., 28 Oct. 0.0381 0.0344 0.0364
16:01-17:00, Wed., 28 Oct. 0.0389 0.0344 0.0363
15:01-16:00, Wed., 28 Oct. 0.0381 0.0337 0.0362
14:01-15:00, Wed., 28 Oct. 0.0384 0.0339 0.0364
13:01-14:00, Wed., 28 Oct. 0.0386 0.0348 0.0364
12:01-13:00, Wed., 28 Oct. 0.0381 0.0338 0.0363
11:01-12:00, Wed., 28 Oct. 0.0384 0.0343 0.0364
10:01-11:00, Wed., 28 Oct. 0.0386 0.0338 0.0367
09:01-10:00, Wed., 28 Oct. 0.0391 0.0345 0.0369
08:01-09:00, Wed., 28 Oct. 0.0388 0.0345 0.0368
07:01-08:00, Wed., 28 Oct. 0.0391 0.0352 0.0370
06:01-07:00, Wed., 28 Oct. 0.0388 0.0348 0.0367