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
20:01-21:00, Sun., 15 Jun. 0.0379 0.0340 0.0362
19:01-20:00, Sun., 15 Jun. 0.0381 0.0347 0.0364
18:01-19:00, Sun., 15 Jun. 0.0395 0.0350 0.0369
17:01-18:00, Sun., 15 Jun. 0.0385 0.0347 0.0368
16:01-17:00, Sun., 15 Jun. 0.0395 0.0345 0.0366
15:01-16:00, Sun., 15 Jun. 0.0392 0.0338 0.0365
14:01-15:00, Sun., 15 Jun. 0.0386 0.0343 0.0367
13:01-14:00, Sun., 15 Jun. 0.0384 0.0347 0.0364
12:01-13:00, Sun., 15 Jun. 0.0391 0.0347 0.0364
11:01-12:00, Sun., 15 Jun. 0.0389 0.0335 0.0363
10:01-11:00, Sun., 15 Jun. 0.0390 0.0334 0.0362
09:01-10:00, Sun., 15 Jun. 0.0388 0.0338 0.0361
08:01-09:00, Sun., 15 Jun. 0.0381 0.0348 0.0364
07:01-08:00, Sun., 15 Jun. 0.0390 0.0347 0.0368
06:01-07:00, Sun., 15 Jun. 0.0404 0.0345 0.0378
05:01-06:00, Sun., 15 Jun. 0.0416 0.0354 0.0390
04:01-05:00, Sun., 15 Jun. 0.0384 0.0339 0.0361
03:01-04:00, Sun., 15 Jun. 0.0396 0.0341 0.0362
02:01-03:00, Sun., 15 Jun. 0.0383 0.0338 0.0362
01:01-02:00, Sun., 15 Jun. 0.0395 0.0345 0.0368
00:01-01:00, Sun., 15 Jun. 0.0398 0.0349 0.0375
23:01-24:00, Sat., 14 Jun. 0.0396 0.0354 0.0376
22:01-23:00, Sat., 14 Jun. 0.0415 0.0371 0.0394
21:01-22:00, Sat., 14 Jun. 0.0423 0.0372 0.0397
20:01-21:00, Sat., 14 Jun. 0.0417 0.0368 0.0393
19:01-20:00, Sat., 14 Jun. 0.0396 0.0356 0.0377
18:01-19:00, Sat., 14 Jun. 0.0398 0.0346 0.0371
17:01-18:00, Sat., 14 Jun. 0.0388 0.0340 0.0366
16:01-17:00, Sat., 14 Jun. 0.0384 0.0351 0.0368
15:01-16:00, Sat., 14 Jun. 0.0390 0.0347 0.0367
14:01-15:00, Sat., 14 Jun. 0.0396 0.0345 0.0369
13:01-14:00, Sat., 14 Jun. 0.0384 0.0341 0.0366
12:01-13:00, Sat., 14 Jun. 0.0387 0.0346 0.0367
11:01-12:00, Sat., 14 Jun. 0.0387 0.0347 0.0366
10:01-11:00, Sat., 14 Jun. 0.0384 0.0345 0.0366
09:01-10:00, Sat., 14 Jun. 0.0380 0.0342 0.0364
08:01-09:00, Sat., 14 Jun. 0.0386 0.0351 0.0367
07:01-08:00, Sat., 14 Jun. 0.0391 0.0342 0.0363
06:01-07:00, Sat., 14 Jun. 0.0391 0.0345 0.0366
05:01-06:00, Sat., 14 Jun. 0.0386 0.0343 0.0367
04:01-05:00, Sat., 14 Jun. 0.0384 0.0345 0.0365
03:01-04:00, Sat., 14 Jun. 0.0391 0.0348 0.0368
02:01-03:00, Sat., 14 Jun. 0.0385 0.0344 0.0364
01:01-02:00, Sat., 14 Jun. 0.0396 0.0349 0.0365
00:01-01:00, Sat., 14 Jun. 0.0395 0.0347 0.0366
23:01-24:00, Fri., 13 Jun. 0.0391 0.0346 0.0364
22:01-23:00, Fri., 13 Jun. 0.0382 0.0338 0.0363
21:01-22:00, Fri., 13 Jun. 0.0382 0.0340 0.0365
20:01-21:00, Fri., 13 Jun. 0.0383 0.0343 0.0363
19:01-20:00, Fri., 13 Jun. 0.0392 0.0347 0.0367
18:01-19:00, Fri., 13 Jun. 0.0399 0.0338 0.0366
17:01-18:00, Fri., 13 Jun. 0.0388 0.0353 0.0369
16:01-17:00, Fri., 13 Jun. 0.0391 0.0349 0.0368
15:01-16:00, Fri., 13 Jun. 0.0382 0.0347 0.0367
14:01-15:00, Fri., 13 Jun. 0.0388 0.0344 0.0367
13:01-14:00, Fri., 13 Jun. 0.0381 0.0345 0.0364
12:01-13:00, Fri., 13 Jun. 0.0393 0.0338 0.0366
11:01-12:00, Fri., 13 Jun. 0.0388 0.0338 0.0363
10:01-11:00, Fri., 13 Jun. 0.0381 0.0348 0.0365
09:01-10:00, Fri., 13 Jun. 0.0384 0.0337 0.0364
08:01-09:00, Fri., 13 Jun. 0.0386 0.0347 0.0367
07:01-08:00, Fri., 13 Jun. 0.0395 0.0333 0.0366
06:01-07:00, Fri., 13 Jun. 0.0381 0.0350 0.0365
05:01-06:00, Fri., 13 Jun. 0.0379 0.0347 0.0363
04:01-05:00, Fri., 13 Jun. 0.0387 0.0346 0.0364
03:01-04:00, Fri., 13 Jun. 0.0384 0.0339 0.0364
02:01-03:00, Fri., 13 Jun. 0.0386 0.0345 0.0365
01:01-02:00, Fri., 13 Jun. 0.0389 0.0343 0.0363
00:01-01:00, Fri., 13 Jun. 0.0391 0.0339 0.0363
23:01-24:00, Thu., 12 Jun. 0.0387 0.0336 0.0364
22:01-23:00, Thu., 12 Jun. 0.0383 0.0338 0.0364
21:01-22:00, Thu., 12 Jun. 0.0388 0.0343 0.0362
20:01-21:00, Thu., 12 Jun. 0.0382 0.0345 0.0364
19:01-20:00, Thu., 12 Jun. 0.0384 0.0344 0.0365
18:01-19:00, Thu., 12 Jun. 0.0378 0.0342 0.0363
17:01-18:00, Thu., 12 Jun. 0.0382 0.0340 0.0363
16:01-17:00, Thu., 12 Jun. 0.0397 0.0347 0.0365
15:01-16:00, Thu., 12 Jun. 0.0381 0.0347 0.0366
14:01-15:00, Thu., 12 Jun. 0.0388 0.0347 0.0368
13:01-14:00, Thu., 12 Jun. 0.0384 0.0340 0.0366
12:01-13:00, Thu., 12 Jun. 0.0388 0.0343 0.0365
11:01-12:00, Thu., 12 Jun. 0.0383 0.0339 0.0364
10:01-11:00, Thu., 12 Jun. 0.0386 0.0339 0.0365
09:01-10:00, Thu., 12 Jun. 0.0383 0.0343 0.0364
08:01-09:00, Thu., 12 Jun. 0.0387 0.0337 0.0363
07:01-08:00, Thu., 12 Jun. 0.0385 0.0340 0.0363
06:01-07:00, Thu., 12 Jun. 0.0388 0.0341 0.0365
05:01-06:00, Thu., 12 Jun. 0.0384 0.0339 0.0364
04:01-05:00, Thu., 12 Jun. 0.0382 0.0345 0.0367
03:01-04:00, Thu., 12 Jun. 0.0378 0.0337 0.0361
02:01-03:00, Thu., 12 Jun. 0.0384 0.0337 0.0364
01:01-02:00, Thu., 12 Jun. 0.0381 0.0342 0.0362
00:01-01:00, Thu., 12 Jun. 0.0390 0.0344 0.0362
23:01-24:00, Wed., 11 Jun. 0.0387 0.0343 0.0360
22:01-23:00, Wed., 11 Jun. 0.0386 0.0340 0.0363
21:01-22:00, Wed., 11 Jun. 0.0385 0.0341 0.0364
20:01-21:00, Wed., 11 Jun. 0.0398 0.0336 0.0362
19:01-20:00, Wed., 11 Jun. 0.0377 0.0342 0.0361
18:01-19:00, Wed., 11 Jun. 0.0389 0.0355 0.0370
17:01-18:00, Wed., 11 Jun. 0.0409 0.0367 0.0383
16:01-17:00, Wed., 11 Jun. 0.0471 0.0382 0.0423
15:01-16:00, Wed., 11 Jun. 0.0474 0.0380 0.0431
14:01-15:00, Wed., 11 Jun. 0.0420 0.0356 0.0399
13:01-14:00, Wed., 11 Jun. 0.0381 0.0341 0.0363
12:01-13:00, Wed., 11 Jun. 0.0385 0.0343 0.0366
11:01-12:00, Wed., 11 Jun. 0.0397 0.0356 0.0372
10:01-11:00, Wed., 11 Jun. 0.0402 0.0345 0.0371
09:01-10:00, Wed., 11 Jun. 0.0399 0.0343 0.0369
08:01-09:00, Wed., 11 Jun. 0.0415 0.0351 0.0383
07:01-08:00, Wed., 11 Jun. 0.0416 0.0356 0.0384
06:01-07:00, Wed., 11 Jun. 0.0392 0.0347 0.0369
05:01-06:00, Wed., 11 Jun. 0.0387 0.0350 0.0365
04:01-05:00, Wed., 11 Jun. 0.0389 0.0341 0.0369
03:01-04:00, Wed., 11 Jun. 0.0410 0.0354 0.0384
02:01-03:00, Wed., 11 Jun. 0.0384 0.0340 0.0363
01:01-02:00, Wed., 11 Jun. 0.0388 0.0343 0.0365
00:01-01:00, Wed., 11 Jun. 0.0381 0.0337 0.0361
23:01-24:00, Tue., 10 Jun. 0.0389 0.0343 0.0363
22:01-23:00, Tue., 10 Jun. 0.0383 0.0344 0.0363
21:01-22:00, Tue., 10 Jun. 0.0387 0.0342 0.0360
20:01-21:00, Tue., 10 Jun. 0.0379 0.0333 0.0362
19:01-20:00, Tue., 10 Jun. 0.0381 0.0339 0.0361
18:01-19:00, Tue., 10 Jun. 0.0381 0.0334 0.0360
17:01-18:00, Tue., 10 Jun. 0.0390 0.0349 0.0367
16:01-17:00, Tue., 10 Jun. 0.0402 0.0357 0.0380
15:01-16:00, Tue., 10 Jun. 0.0430 0.0381 0.0408
14:01-15:00, Tue., 10 Jun. 0.0429 0.0383 0.0407
13:01-14:00, Tue., 10 Jun. 0.0439 0.0379 0.0403
12:01-13:00, Tue., 10 Jun. 0.0413 0.0350 0.0386
11:01-12:00, Tue., 10 Jun. 0.0414 0.0369 0.0390
10:01-11:00, Tue., 10 Jun. 0.0420 0.0360 0.0395
09:01-10:00, Tue., 10 Jun. 0.0450 0.0388 0.0423
08:01-09:00, Tue., 10 Jun. 0.0430 0.0371 0.0400
07:01-08:00, Tue., 10 Jun. 0.0426 0.0364 0.0395
06:01-07:00, Tue., 10 Jun. 0.0413 0.0357 0.0388
05:01-06:00, Tue., 10 Jun. 0.0421 0.0367 0.0402
04:01-05:00, Tue., 10 Jun. 0.0404 0.0370 0.0389
03:01-04:00, Tue., 10 Jun. 0.0403 0.0364 0.0387
02:01-03:00, Tue., 10 Jun. 0.0402 0.0362 0.0383
01:01-02:00, Tue., 10 Jun. 0.0393 0.0345 0.0369
00:01-01:00, Tue., 10 Jun. 0.0395 0.0350 0.0371
23:01-24:00, Mon., 09 Jun. 0.0396 0.0355 0.0374
22:01-23:00, Mon., 09 Jun. 0.0407 0.0342 0.0380
21:01-22:00, Mon., 09 Jun. 0.0402 0.0353 0.0379
20:01-21:00, Mon., 09 Jun. 0.0391 0.0357 0.0374
19:01-20:00, Mon., 09 Jun. 0.0403 0.0351 0.0376
18:01-19:00, Mon., 09 Jun. 0.0405 0.0350 0.0380
17:01-18:00, Mon., 09 Jun. 0.0405 0.0367 0.0387
16:01-17:00, Mon., 09 Jun. 0.0398 0.0362 0.0382
15:01-16:00, Mon., 09 Jun. 0.0390 0.0343 0.0367
14:01-15:00, Mon., 09 Jun. 0.0386 0.0343 0.0366
13:01-14:00, Mon., 09 Jun. 0.0391 0.0342 0.0364
12:01-13:00, Mon., 09 Jun. 0.0391 0.0349 0.0365
11:01-12:00, Mon., 09 Jun. 0.0394 0.0342 0.0365
10:01-11:00, Mon., 09 Jun. 0.0390 0.0347 0.0367
09:01-10:00, Mon., 09 Jun. 0.0400 0.0343 0.0366
08:01-09:00, Mon., 09 Jun. 0.0388 0.0348 0.0369
07:01-08:00, Mon., 09 Jun. 0.0388 0.0347 0.0371
06:01-07:00, Mon., 09 Jun. 0.0384 0.0349 0.0368
05:01-06:00, Mon., 09 Jun. 0.0395 0.0351 0.0368
04:01-05:00, Mon., 09 Jun. 0.0388 0.0347 0.0367
03:01-04:00, Mon., 09 Jun. 0.0398 0.0350 0.0369
02:01-03:00, Mon., 09 Jun. 0.0391 0.0352 0.0371
01:01-02:00, Mon., 09 Jun. 0.0388 0.0340 0.0367
00:01-01:00, Mon., 09 Jun. 0.0399 0.0350 0.0371
23:01-24:00, Sun., 08 Jun. 0.0391 0.0346 0.0369
22:01-23:00, Sun., 08 Jun. 0.0387 0.0342 0.0367
21:01-22:00, Sun., 08 Jun. 0.0393 0.0344 0.0368
20:01-21:00, Sun., 08 Jun. 0.0383 0.0346 0.0365
19:01-20:00, Sun., 08 Jun. 0.0401 0.0350 0.0368
18:01-19:00, Sun., 08 Jun. 0.0386 0.0340 0.0367
17:01-18:00, Sun., 08 Jun. 0.0387 0.0343 0.0368
16:01-17:00, Sun., 08 Jun. 0.0392 0.0352 0.0368
15:01-16:00, Sun., 08 Jun. 0.0384 0.0347 0.0366
14:01-15:00, Sun., 08 Jun. 0.0389 0.0342 0.0365
13:01-14:00, Sun., 08 Jun. 0.0388 0.0342 0.0366
12:01-13:00, Sun., 08 Jun. 0.0391 0.0352 0.0369
11:01-12:00, Sun., 08 Jun. 0.0385 0.0335 0.0364
10:01-11:00, Sun., 08 Jun. 0.0394 0.0350 0.0370
09:01-10:00, Sun., 08 Jun. 0.0395 0.0347 0.0372
08:01-09:00, Sun., 08 Jun. 0.0405 0.0353 0.0380
07:01-08:00, Sun., 08 Jun. 0.0397 0.0357 0.0378
06:01-07:00, Sun., 08 Jun. 0.0393 0.0354 0.0374
05:01-06:00, Sun., 08 Jun. 0.0398 0.0358 0.0380
04:01-05:00, Sun., 08 Jun. 0.0394 0.0355 0.0373
03:01-04:00, Sun., 08 Jun. 0.0387 0.0351 0.0368
02:01-03:00, Sun., 08 Jun. 0.0379 0.0340 0.0364
01:01-02:00, Sun., 08 Jun. 0.0387 0.0337 0.0365
00:01-01:00, Sun., 08 Jun. 0.0391 0.0347 0.0366
23:01-24:00, Sat., 07 Jun. 0.0390 0.0340 0.0363
22:01-23:00, Sat., 07 Jun. 0.0389 0.0339 0.0367
21:01-22:00, Sat., 07 Jun. 0.0381 0.0347 0.0366
20:01-21:00, Sat., 07 Jun. 0.0378 0.0345 0.0363
19:01-20:00, Sat., 07 Jun. 0.0389 0.0340 0.0364
18:01-19:00, Sat., 07 Jun. 0.0385 0.0345 0.0367
17:01-18:00, Sat., 07 Jun. 0.0387 0.0344 0.0368
16:01-17:00, Sat., 07 Jun. 0.0384 0.0340 0.0366
15:01-16:00, Sat., 07 Jun. 0.0403 0.0184 0.0364
14:01-15:00, Sat., 07 Jun. 0.0391 0.0353 0.0369
13:01-14:00, Sat., 07 Jun. 0.0393 0.0348 0.0367
12:01-13:00, Sat., 07 Jun. 0.0388 0.0349 0.0368
11:01-12:00, Sat., 07 Jun. 0.0384 0.0347 0.0366
10:01-11:00, Sat., 07 Jun. 0.0384 0.0337 0.0364
09:01-10:00, Sat., 07 Jun. 0.0392 0.0342 0.0367
08:01-09:00, Sat., 07 Jun. 0.0390 0.0346 0.0364
07:01-08:00, Sat., 07 Jun. 0.0394 0.0342 0.0367
06:01-07:00, Sat., 07 Jun. 0.0387 0.0347 0.0363
05:01-06:00, Sat., 07 Jun. 0.0402 0.0345 0.0364
04:01-05:00, Sat., 07 Jun. 0.0391 0.0348 0.0366
03:01-04:00, Sat., 07 Jun. 0.0378 0.0341 0.0363
02:01-03:00, Sat., 07 Jun. 0.0388 0.0341 0.0365
01:01-02:00, Sat., 07 Jun. 0.0389 0.0335 0.0363
00:01-01:00, Sat., 07 Jun. 0.0386 0.0342 0.0364
23:01-24:00, Fri., 06 Jun. 0.0388 0.0337 0.0365
22:01-23:00, Fri., 06 Jun. 0.0394 0.0336 0.0363
21:01-22:00, Fri., 06 Jun. 0.0385 0.0342 0.0363
20:01-21:00, Fri., 06 Jun. 0.0382 0.0346 0.0364
19:01-20:00, Fri., 06 Jun. 0.0381 0.0343 0.0365
18:01-19:00, Fri., 06 Jun. 0.0388 0.0344 0.0364
17:01-18:00, Fri., 06 Jun. 0.0380 0.0344 0.0364
16:01-17:00, Fri., 06 Jun. 0.0398 0.0351 0.0365
15:01-16:00, Fri., 06 Jun. 0.0387 0.0345 0.0365
14:01-15:00, Fri., 06 Jun. 0.0388 0.0343 0.0364
13:01-14:00, Fri., 06 Jun. 0.0389 0.0344 0.0367
12:01-13:00, Fri., 06 Jun. 0.0382 0.0342 0.0363
11:01-12:00, Fri., 06 Jun. 0.0384 0.0337 0.0364
10:01-11:00, Fri., 06 Jun. 0.0386 0.0346 0.0367
09:01-10:00, Fri., 06 Jun. 0.0391 0.0347 0.0367
08:01-09:00, Fri., 06 Jun. 0.0392 0.0350 0.0367
07:01-08:00, Fri., 06 Jun. 0.0387 0.0352 0.0369
06:01-07:00, Fri., 06 Jun. 0.0398 0.0350 0.0371
05:01-06:00, Fri., 06 Jun. 0.0383 0.0342 0.0367
04:01-05:00, Fri., 06 Jun. 0.0397 0.0350 0.0369
03:01-04:00, Fri., 06 Jun. 0.0384 0.0350 0.0366
02:01-03:00, Fri., 06 Jun. 0.0390 0.0342 0.0366
01:01-02:00, Fri., 06 Jun. 0.0392 0.0345 0.0366
00:01-01:00, Fri., 06 Jun. 0.0387 0.0347 0.0367
23:01-24:00, Thu., 05 Jun. 0.0387 0.0347 0.0368
22:01-23:00, Thu., 05 Jun. 0.0396 0.0343 0.0368
21:01-22:00, Thu., 05 Jun. 0.0388 0.0335 0.0364