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
19:01-20:00, Sat., 01 Aug. 0.0405 0.0353 0.0381
18:01-19:00, Sat., 01 Aug. 0.0404 0.0347 0.0373
17:01-18:00, Sat., 01 Aug. 0.0385 0.0348 0.0365
16:01-17:00, Sat., 01 Aug. 0.0386 0.0340 0.0365
15:01-16:00, Sat., 01 Aug. 0.0385 0.0340 0.0366
14:01-15:00, Sat., 01 Aug. 0.0384 0.0350 0.0368
13:01-14:00, Sat., 01 Aug. 0.0389 0.0353 0.0370
12:01-13:00, Sat., 01 Aug. 0.0388 0.0352 0.0371
11:01-12:00, Sat., 01 Aug. 0.0393 0.0352 0.0369
10:01-11:00, Sat., 01 Aug. 0.0398 0.0352 0.0368
09:01-10:00, Sat., 01 Aug. 0.0398 0.0347 0.0366
08:01-09:00, Sat., 01 Aug. 0.0392 0.0345 0.0367
07:01-08:00, Sat., 01 Aug. 0.0391 0.0343 0.0366
06:01-07:00, Sat., 01 Aug. 0.0388 0.0346 0.0366
05:01-06:00, Sat., 01 Aug. 0.0388 0.0343 0.0365
04:01-05:00, Sat., 01 Aug. 0.0391 0.0350 0.0365
03:01-04:00, Sat., 01 Aug. 0.0387 0.0351 0.0366
02:01-03:00, Sat., 01 Aug. 0.0384 0.0344 0.0367
01:01-02:00, Sat., 01 Aug. 0.0388 0.0353 0.0366
00:01-01:00, Sat., 01 Aug. 0.0398 0.0349 0.0369
23:01-24:00, Fri., 31 Jul. 0.0394 0.0346 0.0369
22:01-23:00, Fri., 31 Jul. 0.0385 0.0346 0.0366
21:01-22:00, Fri., 31 Jul. 0.0390 0.0349 0.0364
20:01-21:00, Fri., 31 Jul. 0.0384 0.0342 0.0365
19:01-20:00, Fri., 31 Jul. 0.0408 0.0348 0.0367
18:01-19:00, Fri., 31 Jul. 0.0387 0.0343 0.0365
17:01-18:00, Fri., 31 Jul. 0.0386 0.0339 0.0363
16:01-17:00, Fri., 31 Jul. 0.0384 0.0337 0.0363
15:01-16:00, Fri., 31 Jul. 0.0383 0.0339 0.0363
14:01-15:00, Fri., 31 Jul. 0.0386 0.0350 0.0366
13:01-14:00, Fri., 31 Jul. 0.0386 0.0352 0.0367
12:01-13:00, Fri., 31 Jul. 0.0388 0.0347 0.0367
11:01-12:00, Fri., 31 Jul. 0.0382 0.0345 0.0366
10:01-11:00, Fri., 31 Jul. 0.0387 0.0351 0.0367
09:01-10:00, Fri., 31 Jul. 0.0390 0.0337 0.0365
08:01-09:00, Fri., 31 Jul. 0.0387 0.0343 0.0363
07:01-08:00, Fri., 31 Jul. 0.0389 0.0346 0.0363
06:01-07:00, Fri., 31 Jul. 0.0378 0.0338 0.0362
05:01-06:00, Fri., 31 Jul. 0.0386 0.0333 0.0364
04:01-05:00, Fri., 31 Jul. 0.0383 0.0343 0.0360
03:01-04:00, Fri., 31 Jul. 0.0376 0.0343 0.0361
02:01-03:00, Fri., 31 Jul. 0.0396 0.0343 0.0365
01:01-02:00, Fri., 31 Jul. 0.0384 0.0344 0.0365
00:01-01:00, Fri., 31 Jul. 0.0392 0.0350 0.0365
23:01-24:00, Thu., 30 Jul. 0.0381 0.0345 0.0365
22:01-23:00, Thu., 30 Jul. 0.0399 0.0348 0.0369
21:01-22:00, Thu., 30 Jul. 0.0416 0.0353 0.0385
20:01-21:00, Thu., 30 Jul. 0.0481 0.0393 0.0430
19:01-20:00, Thu., 30 Jul. 0.0562 0.0367 0.0499
18:01-19:00, Thu., 30 Jul. 0.0386 0.0346 0.0366
17:01-18:00, Thu., 30 Jul. 0.0384 0.0338 0.0368
16:01-17:00, Thu., 30 Jul. 0.0398 0.0350 0.0369
15:01-16:00, Thu., 30 Jul. 0.0393 0.0340 0.0366
14:01-15:00, Thu., 30 Jul. 0.0391 0.0347 0.0367
13:01-14:00, Thu., 30 Jul. 0.0390 0.0346 0.0366
12:01-13:00, Thu., 30 Jul. 0.0394 0.0345 0.0365
11:01-12:00, Thu., 30 Jul. 0.0389 0.0350 0.0367
10:01-11:00, Thu., 30 Jul. 0.0395 0.0352 0.0368
09:01-10:00, Thu., 30 Jul. 0.0390 0.0347 0.0369
08:01-09:00, Thu., 30 Jul. 0.0382 0.0343 0.0366
07:01-08:00, Thu., 30 Jul. 0.0387 0.0333 0.0367
06:01-07:00, Thu., 30 Jul. 0.0386 0.0347 0.0366
05:01-06:00, Thu., 30 Jul. 0.0389 0.0342 0.0367
04:01-05:00, Thu., 30 Jul. 0.0398 0.0342 0.0370
03:01-04:00, Thu., 30 Jul. 0.0392 0.0347 0.0368
02:01-03:00, Thu., 30 Jul. 0.0398 0.0346 0.0368
01:01-02:00, Thu., 30 Jul. 0.0391 0.0343 0.0368
00:01-01:00, Thu., 30 Jul. 0.0388 0.0343 0.0367
23:01-24:00, Wed., 29 Jul. 0.0390 0.0350 0.0366
22:01-23:00, Wed., 29 Jul. 0.0381 0.0337 0.0363
21:01-22:00, Wed., 29 Jul. 0.0378 0.0343 0.0360
20:01-21:00, Wed., 29 Jul. 0.0378 0.0336 0.0360
19:01-20:00, Wed., 29 Jul. 0.0376 0.0340 0.0360
18:01-19:00, Wed., 29 Jul. 0.0383 0.0340 0.0361
17:01-18:00, Wed., 29 Jul. 0.0382 0.0342 0.0361
16:01-17:00, Wed., 29 Jul. 0.0376 0.0336 0.0361
15:01-16:00, Wed., 29 Jul. 0.0384 0.0342 0.0363
14:01-15:00, Wed., 29 Jul. 0.0381 0.0343 0.0363
13:01-14:00, Wed., 29 Jul. 0.0383 0.0343 0.0365
12:01-13:00, Wed., 29 Jul. 0.0395 0.0345 0.0369
11:01-12:00, Wed., 29 Jul. 0.0396 0.0349 0.0368
10:01-11:00, Wed., 29 Jul. 0.0395 0.0347 0.0366
09:01-10:00, Wed., 29 Jul. 0.0380 0.0343 0.0364
08:01-09:00, Wed., 29 Jul. 0.0390 0.0337 0.0363
07:01-08:00, Wed., 29 Jul. 0.0384 0.0350 0.0366
06:01-07:00, Wed., 29 Jul. 0.0383 0.0343 0.0362
05:01-06:00, Wed., 29 Jul. 0.0393 0.0344 0.0364
04:01-05:00, Wed., 29 Jul. 0.0381 0.0343 0.0363
03:01-04:00, Wed., 29 Jul. 0.0382 0.0337 0.0359
02:01-03:00, Wed., 29 Jul. 0.0382 0.0337 0.0361
01:01-02:00, Wed., 29 Jul. 0.0387 0.0336 0.0361
00:01-01:00, Wed., 29 Jul. 0.0385 0.0343 0.0362
23:01-24:00, Tue., 28 Jul. 0.0385 0.0343 0.0360
22:01-23:00, Tue., 28 Jul. 0.0379 0.0338 0.0359
21:01-22:00, Tue., 28 Jul. 0.0382 0.0343 0.0362
20:01-21:00, Tue., 28 Jul. 0.0388 0.0350 0.0364
19:01-20:00, Tue., 28 Jul. 0.0387 0.0340 0.0365
18:01-19:00, Tue., 28 Jul. 0.0392 0.0345 0.0369
17:01-18:00, Tue., 28 Jul. 0.0431 0.0358 0.0395
16:01-17:00, Tue., 28 Jul. 0.0552 0.0424 0.0482
15:01-16:00, Tue., 28 Jul. 0.0562 0.0358 0.0477
14:01-15:00, Tue., 28 Jul. 0.0389 0.0339 0.0364
13:01-14:00, Tue., 28 Jul. 0.0391 0.0338 0.0365
12:01-13:00, Tue., 28 Jul. 0.0387 0.0340 0.0362
11:01-12:00, Tue., 28 Jul. 0.0388 0.0334 0.0363
10:01-11:00, Tue., 28 Jul. 0.0375 0.0342 0.0359
09:01-10:00, Tue., 28 Jul. 0.0381 0.0343 0.0361
08:01-09:00, Tue., 28 Jul. 0.0380 0.0336 0.0361
07:01-08:00, Tue., 28 Jul. 0.0379 0.0336 0.0362
06:01-07:00, Tue., 28 Jul. 0.0377 0.0340 0.0360
05:01-06:00, Tue., 28 Jul. 0.0385 0.0343 0.0360
04:01-05:00, Tue., 28 Jul. 0.0381 0.0337 0.0358
03:01-04:00, Tue., 28 Jul. 0.0384 0.0340 0.0361
02:01-03:00, Tue., 28 Jul. 0.0388 0.0340 0.0360
01:01-02:00, Tue., 28 Jul. 0.0378 0.0335 0.0360
00:01-01:00, Tue., 28 Jul. 0.0384 0.0337 0.0361
23:01-24:00, Mon., 27 Jul. 0.0384 0.0340 0.0361
22:01-23:00, Mon., 27 Jul. 0.0384 0.0340 0.0360
21:01-22:00, Mon., 27 Jul. 0.0384 0.0343 0.0363
20:01-21:00, Mon., 27 Jul. 0.0384 0.0338 0.0361
19:01-20:00, Mon., 27 Jul. 0.0382 0.0343 0.0362
18:01-19:00, Mon., 27 Jul. 0.0384 0.0336 0.0363
17:01-18:00, Mon., 27 Jul. 0.0386 0.0333 0.0361
16:01-17:00, Mon., 27 Jul. 0.0381 0.0342 0.0361
15:01-16:00, Mon., 27 Jul. 0.0381 0.0347 0.0362
14:01-15:00, Mon., 27 Jul. 0.0378 0.0348 0.0364
13:01-14:00, Mon., 27 Jul. 0.0391 0.0345 0.0366
12:01-13:00, Mon., 27 Jul. 0.0381 0.0344 0.0365
11:01-12:00, Mon., 27 Jul. 0.0377 0.0339 0.0361
10:01-11:00, Mon., 27 Jul. 0.0384 0.0335 0.0359
09:01-10:00, Mon., 27 Jul. 0.0378 0.0340 0.0361
08:01-09:00, Mon., 27 Jul. 0.0379 0.0336 0.0360
07:01-08:00, Mon., 27 Jul. 0.0381 0.0342 0.0360
06:01-07:00, Mon., 27 Jul. 0.0388 0.0340 0.0361
05:01-06:00, Mon., 27 Jul. 0.0384 0.0337 0.0360
04:01-05:00, Mon., 27 Jul. 0.0379 0.0343 0.0357
03:01-04:00, Mon., 27 Jul. 0.0378 0.0343 0.0359
02:01-03:00, Mon., 27 Jul. 0.0389 0.0338 0.0361
01:01-02:00, Mon., 27 Jul. 0.0377 0.0345 0.0360
00:01-01:00, Mon., 27 Jul. 0.0384 0.0343 0.0361
23:01-24:00, Sun., 26 Jul. 0.0382 0.0342 0.0359
22:01-23:00, Sun., 26 Jul. 0.0389 0.0343 0.0364
21:01-22:00, Sun., 26 Jul. 0.0392 0.0342 0.0369
20:01-21:00, Sun., 26 Jul. 0.0422 0.0368 0.0391
19:01-20:00, Sun., 26 Jul. 0.0462 0.0391 0.0431
18:01-19:00, Sun., 26 Jul. 0.0453 0.0346 0.0384
17:01-18:00, Sun., 26 Jul. 0.0390 0.0344 0.0365
16:01-17:00, Sun., 26 Jul. 0.0402 0.0357 0.0378
15:01-16:00, Sun., 26 Jul. 0.0462 0.0375 0.0416
14:01-15:00, Sun., 26 Jul. 0.0536 0.0448 0.0496
13:01-14:00, Sun., 26 Jul. 0.0529 0.0367 0.0474
12:01-13:00, Sun., 26 Jul. 0.0392 0.0340 0.0366
11:01-12:00, Sun., 26 Jul. 0.0391 0.0347 0.0366
10:01-11:00, Sun., 26 Jul. 0.0384 0.0334 0.0365
09:01-10:00, Sun., 26 Jul. 0.0385 0.0343 0.0362
08:01-09:00, Sun., 26 Jul. 0.0380 0.0343 0.0362
07:01-08:00, Sun., 26 Jul. 0.0381 0.0348 0.0362
06:01-07:00, Sun., 26 Jul. 0.0387 0.0334 0.0361
05:01-06:00, Sun., 26 Jul. 0.0386 0.0346 0.0362
04:01-05:00, Sun., 26 Jul. 0.0384 0.0334 0.0358
03:01-04:00, Sun., 26 Jul. 0.0377 0.0333 0.0357
02:01-03:00, Sun., 26 Jul. 0.0376 0.0333 0.0360
01:01-02:00, Sun., 26 Jul. 0.0388 0.0339 0.0363
00:01-01:00, Sun., 26 Jul. 0.0384 0.0338 0.0362
23:01-24:00, Sat., 25 Jul. 0.0388 0.0354 0.0372
22:01-23:00, Sat., 25 Jul. 0.0421 0.0357 0.0391
21:01-22:00, Sat., 25 Jul. 0.0384 0.0343 0.0365
20:01-21:00, Sat., 25 Jul. 0.0383 0.0349 0.0365
19:01-20:00, Sat., 25 Jul. 0.0381 0.0341 0.0362
18:01-19:00, Sat., 25 Jul. 0.0381 0.0339 0.0360
17:01-18:00, Sat., 25 Jul. 0.0380 0.0345 0.0361
16:01-17:00, Sat., 25 Jul. 0.0388 0.0343 0.0363
15:01-16:00, Sat., 25 Jul. 0.0387 0.0341 0.0364
14:01-15:00, Sat., 25 Jul. 0.0383 0.0350 0.0364
13:01-14:00, Sat., 25 Jul. 0.0392 0.0340 0.0366
12:01-13:00, Sat., 25 Jul. 0.0390 0.0345 0.0368
11:01-12:00, Sat., 25 Jul. 0.0384 0.0338 0.0366
10:01-11:00, Sat., 25 Jul. 0.0386 0.0326 0.0366
09:01-10:00, Sat., 25 Jul. 0.0391 0.0335 0.0363
08:01-09:00, Sat., 25 Jul. 0.0386 0.0344 0.0365
07:01-08:00, Sat., 25 Jul. 0.0384 0.0342 0.0363
06:01-07:00, Sat., 25 Jul. 0.0385 0.0345 0.0363
05:01-06:00, Sat., 25 Jul. 0.0395 0.0349 0.0365
04:01-05:00, Sat., 25 Jul. 0.0382 0.0343 0.0362
03:01-04:00, Sat., 25 Jul. 0.0386 0.0344 0.0364
02:01-03:00, Sat., 25 Jul. 0.0387 0.0344 0.0363
01:01-02:00, Sat., 25 Jul. 0.0384 0.0338 0.0363
00:01-01:00, Sat., 25 Jul. 0.0381 0.0339 0.0362
23:01-24:00, Fri., 24 Jul. 0.0384 0.0342 0.0361
22:01-23:00, Fri., 24 Jul. 0.0382 0.0335 0.0362
21:01-22:00, Fri., 24 Jul. 0.0384 0.0339 0.0361
20:01-21:00, Fri., 24 Jul. 0.0387 0.0337 0.0364
19:01-20:00, Fri., 24 Jul. 0.0414 0.0359 0.0380
18:01-19:00, Fri., 24 Jul. 0.0464 0.0386 0.0421
17:01-18:00, Fri., 24 Jul. 0.0513 0.0357 0.0457
16:01-17:00, Fri., 24 Jul. 0.0401 0.0340 0.0368
15:01-16:00, Fri., 24 Jul. 0.0389 0.0344 0.0366
14:01-15:00, Fri., 24 Jul. 0.0385 0.0352 0.0369
13:01-14:00, Fri., 24 Jul. 0.0392 0.0343 0.0368
12:01-13:00, Fri., 24 Jul. 0.0386 0.0347 0.0369
11:01-12:00, Fri., 24 Jul. 0.0389 0.0353 0.0371
10:01-11:00, Fri., 24 Jul. 0.0392 0.0339 0.0367
09:01-10:00, Fri., 24 Jul. 0.0391 0.0340 0.0369
08:01-09:00, Fri., 24 Jul. 0.0385 0.0342 0.0366
07:01-08:00, Fri., 24 Jul. 0.0384 0.0339 0.0367
06:01-07:00, Fri., 24 Jul. 0.0388 0.0349 0.0367
05:01-06:00, Fri., 24 Jul. 0.0385 0.0345 0.0369
04:01-05:00, Fri., 24 Jul. 0.0396 0.0344 0.0369
03:01-04:00, Fri., 24 Jul. 0.0399 0.0344 0.0369
02:01-03:00, Fri., 24 Jul. 0.0391 0.0351 0.0369
01:01-02:00, Fri., 24 Jul. 0.0402 0.0348 0.0369
00:01-01:00, Fri., 24 Jul. 0.0393 0.0353 0.0372
23:01-24:00, Thu., 23 Jul. 0.0399 0.0337 0.0368
22:01-23:00, Thu., 23 Jul. 0.0389 0.0336 0.0369
21:01-22:00, Thu., 23 Jul. 0.0389 0.0349 0.0367
20:01-21:00, Thu., 23 Jul. 0.0381 0.0347 0.0365
19:01-20:00, Thu., 23 Jul. 0.0382 0.0348 0.0366
18:01-19:00, Thu., 23 Jul. 0.0383 0.0336 0.0364
17:01-18:00, Thu., 23 Jul. 0.0387 0.0337 0.0365
16:01-17:00, Thu., 23 Jul. 0.0388 0.0342 0.0366
15:01-16:00, Thu., 23 Jul. 0.0387 0.0343 0.0364
14:01-15:00, Thu., 23 Jul. 0.0390 0.0340 0.0366
13:01-14:00, Thu., 23 Jul. 0.0388 0.0345 0.0364
12:01-13:00, Thu., 23 Jul. 0.0390 0.0347 0.0369
11:01-12:00, Thu., 23 Jul. 0.0396 0.0347 0.0371
10:01-11:00, Thu., 23 Jul. 0.0388 0.0357 0.0374
09:01-10:00, Thu., 23 Jul. 0.0388 0.0333 0.0370
08:01-09:00, Thu., 23 Jul. 0.0396 0.0347 0.0372
07:01-08:00, Thu., 23 Jul. 0.0391 0.0356 0.0374
06:01-07:00, Thu., 23 Jul. 0.0396 0.0350 0.0370
05:01-06:00, Thu., 23 Jul. 0.0390 0.0350 0.0369
04:01-05:00, Thu., 23 Jul. 0.0390 0.0338 0.0367
03:01-04:00, Thu., 23 Jul. 0.0394 0.0345 0.0366
02:01-03:00, Thu., 23 Jul. 0.0389 0.0343 0.0369
01:01-02:00, Thu., 23 Jul. 0.0392 0.0350 0.0371
00:01-01:00, Thu., 23 Jul. 0.0391 0.0339 0.0366
23:01-24:00, Wed., 22 Jul. 0.0398 0.0336 0.0369
22:01-23:00, Wed., 22 Jul. 0.0393 0.0341 0.0369
21:01-22:00, Wed., 22 Jul. 0.0390 0.0348 0.0367
20:01-21:00, Wed., 22 Jul. 0.0389 0.0343 0.0367