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
03:01-04:00, Mon., 22 Jun. 0.0384 0.0343 0.0360
02:01-03:00, Mon., 22 Jun. 0.0384 0.0341 0.0361
01:01-02:00, Mon., 22 Jun. 0.0387 0.0340 0.0362
00:01-01:00, Mon., 22 Jun. 0.0384 0.0341 0.0364
22:01-23:00, Sun., 21 Jun. 0.0385 0.0338 0.0363
21:01-22:00, Sun., 21 Jun. 0.0380 0.0347 0.0363
20:01-21:00, Sun., 21 Jun. 0.0386 0.0343 0.0361
19:01-20:00, Sun., 21 Jun. 0.0379 0.0343 0.0361
18:01-19:00, Sun., 21 Jun. 0.0389 0.0339 0.0362
17:01-18:00, Sun., 21 Jun. 0.0383 0.0345 0.0363
16:01-17:00, Sun., 21 Jun. 0.0388 0.0334 0.0364
15:01-16:00, Sun., 21 Jun. 0.0381 0.0342 0.0364
14:01-15:00, Sun., 21 Jun. 0.0385 0.0346 0.0363
13:01-14:00, Sun., 21 Jun. 0.0385 0.0344 0.0362
12:01-13:00, Sun., 21 Jun. 0.0388 0.0343 0.0364
11:01-12:00, Sun., 21 Jun. 0.0378 0.0343 0.0362
10:01-11:00, Sun., 21 Jun. 0.0387 0.0341 0.0361
09:01-10:00, Sun., 21 Jun. 0.0378 0.0340 0.0361
08:01-09:00, Sun., 21 Jun. 0.0381 0.0338 0.0361
07:01-08:00, Sun., 21 Jun. 0.0386 0.0343 0.0361
06:01-07:00, Sun., 21 Jun. 0.0395 0.0344 0.0371
05:01-06:00, Sun., 21 Jun. 0.0419 0.0362 0.0391
04:01-05:00, Sun., 21 Jun. 0.0457 0.0391 0.0425
03:01-04:00, Sun., 21 Jun. 0.0429 0.0386 0.0408
02:01-03:00, Sun., 21 Jun. 0.0443 0.0388 0.0417
01:01-02:00, Sun., 21 Jun. 0.0438 0.0377 0.0400
00:01-01:00, Sun., 21 Jun. 0.0410 0.0364 0.0390
22:01-23:00, Sat., 20 Jun. 0.0431 0.0375 0.0403
21:01-22:00, Sat., 20 Jun. 0.0479 0.0400 0.0430
20:01-21:00, Sat., 20 Jun. 0.0464 0.0404 0.0431
19:01-20:00, Sat., 20 Jun. 0.0431 0.0394 0.0413
18:01-19:00, Sat., 20 Jun. 0.0421 0.0374 0.0395
17:01-18:00, Sat., 20 Jun. 0.0414 0.0371 0.0391
16:01-17:00, Sat., 20 Jun. 0.0406 0.0352 0.0383
15:01-16:00, Sat., 20 Jun. 0.0419 0.0356 0.0386
14:01-15:00, Sat., 20 Jun. 0.0405 0.0365 0.0390
13:01-14:00, Sat., 20 Jun. 0.0413 0.0364 0.0392
12:01-13:00, Sat., 20 Jun. 0.0399 0.0339 0.0367
11:01-12:00, Sat., 20 Jun. 0.0384 0.0329 0.0363
10:01-11:00, Sat., 20 Jun. 0.0384 0.0338 0.0359
09:01-10:00, Sat., 20 Jun. 0.0387 0.0332 0.0361
08:01-09:00, Sat., 20 Jun. 0.0384 0.0336 0.0361
07:01-08:00, Sat., 20 Jun. 0.0395 0.0338 0.0361
06:01-07:00, Sat., 20 Jun. 0.0384 0.0333 0.0362
05:01-06:00, Sat., 20 Jun. 0.0381 0.0341 0.0360
04:01-05:00, Sat., 20 Jun. 0.0381 0.0339 0.0360
03:01-04:00, Sat., 20 Jun. 0.0385 0.0329 0.0362
02:01-03:00, Sat., 20 Jun. 0.0381 0.0342 0.0361
01:01-02:00, Sat., 20 Jun. 0.0385 0.0340 0.0361
00:01-01:00, Sat., 20 Jun. 0.0384 0.0344 0.0361
22:01-23:00, Fri., 19 Jun. 0.0379 0.0338 0.0361
21:01-22:00, Fri., 19 Jun. 0.0380 0.0343 0.0363
20:01-21:00, Fri., 19 Jun. 0.0384 0.0340 0.0360
19:01-20:00, Fri., 19 Jun. 0.0385 0.0345 0.0363
18:01-19:00, Fri., 19 Jun. 0.0391 0.0345 0.0365
17:01-18:00, Fri., 19 Jun. 0.0390 0.0345 0.0363
16:01-17:00, Fri., 19 Jun. 0.0384 0.0347 0.0363
15:01-16:00, Fri., 19 Jun. 0.0384 0.0339 0.0365
14:01-15:00, Fri., 19 Jun. 0.0381 0.0347 0.0366
13:01-14:00, Fri., 19 Jun. 0.0385 0.0351 0.0365
12:01-13:00, Fri., 19 Jun. 0.0391 0.0340 0.0364
11:01-12:00, Fri., 19 Jun. 0.0384 0.0341 0.0362
10:01-11:00, Fri., 19 Jun. 0.0385 0.0336 0.0361
09:01-10:00, Fri., 19 Jun. 0.0383 0.0340 0.0362
08:01-09:00, Fri., 19 Jun. 0.0384 0.0333 0.0360
07:01-08:00, Fri., 19 Jun. 0.0378 0.0333 0.0358
06:01-07:00, Fri., 19 Jun. 0.0384 0.0336 0.0362
05:01-06:00, Fri., 19 Jun. 0.0385 0.0340 0.0361
04:01-05:00, Fri., 19 Jun. 0.0379 0.0337 0.0360
03:01-04:00, Fri., 19 Jun. 0.0384 0.0341 0.0361
02:01-03:00, Fri., 19 Jun. 0.0386 0.0340 0.0361
01:01-02:00, Fri., 19 Jun. 0.0384 0.0343 0.0359
00:01-01:00, Fri., 19 Jun. 0.0383 0.0339 0.0360
22:01-23:00, Thu., 18 Jun. 0.0378 0.0339 0.0359
21:01-22:00, Thu., 18 Jun. 0.0377 0.0338 0.0360
20:01-21:00, Thu., 18 Jun. 0.0383 0.0340 0.0360
19:01-20:00, Thu., 18 Jun. 0.0374 0.0340 0.0360
18:01-19:00, Thu., 18 Jun. 0.0382 0.0336 0.0364
17:01-18:00, Thu., 18 Jun. 0.0384 0.0339 0.0361
16:01-17:00, Thu., 18 Jun. 0.0381 0.0330 0.0361
15:01-16:00, Thu., 18 Jun. 0.0388 0.0336 0.0361
14:01-15:00, Thu., 18 Jun. 0.0379 0.0336 0.0360
13:01-14:00, Thu., 18 Jun. 0.0384 0.0336 0.0361
12:01-13:00, Thu., 18 Jun. 0.0382 0.0341 0.0362
11:01-12:00, Thu., 18 Jun. 0.0389 0.0349 0.0368
10:01-11:00, Thu., 18 Jun. 0.0403 0.0346 0.0367
09:01-10:00, Thu., 18 Jun. 0.0402 0.0345 0.0372
08:01-09:00, Thu., 18 Jun. 0.0396 0.0353 0.0376
07:01-08:00, Thu., 18 Jun. 0.0406 0.0355 0.0378
06:01-07:00, Thu., 18 Jun. 0.0406 0.0361 0.0389
05:01-06:00, Thu., 18 Jun. 0.0419 0.0356 0.0390
04:01-05:00, Thu., 18 Jun. 0.0412 0.0370 0.0391
03:01-04:00, Thu., 18 Jun. 0.0421 0.0368 0.0396
02:01-03:00, Thu., 18 Jun. 0.0417 0.0372 0.0392
01:01-02:00, Thu., 18 Jun. 0.0421 0.0362 0.0394
00:01-01:00, Thu., 18 Jun. 0.0416 0.0347 0.0387
22:01-23:00, Wed., 17 Jun. 0.0384 0.0344 0.0367
21:01-22:00, Wed., 17 Jun. 0.0386 0.0343 0.0365
20:01-21:00, Wed., 17 Jun. 0.0383 0.0342 0.0363
19:01-20:00, Wed., 17 Jun. 0.0382 0.0348 0.0365
18:01-19:00, Wed., 17 Jun. 0.0384 0.0341 0.0364
17:01-18:00, Wed., 17 Jun. 0.0378 0.0343 0.0363
16:01-17:00, Wed., 17 Jun. 0.0387 0.0347 0.0367
15:01-16:00, Wed., 17 Jun. 0.0389 0.0343 0.0366
14:01-15:00, Wed., 17 Jun. 0.0387 0.0344 0.0366
13:01-14:00, Wed., 17 Jun. 0.0384 0.0343 0.0365
12:01-13:00, Wed., 17 Jun. 0.0385 0.0350 0.0365
11:01-12:00, Wed., 17 Jun. 0.0380 0.0343 0.0362
10:01-11:00, Wed., 17 Jun. 0.0384 0.0343 0.0363
09:01-10:00, Wed., 17 Jun. 0.0391 0.0348 0.0363
08:01-09:00, Wed., 17 Jun. 0.0384 0.0348 0.0362
07:01-08:00, Wed., 17 Jun. 0.0388 0.0352 0.0366
06:01-07:00, Wed., 17 Jun. 0.0396 0.0345 0.0365
05:01-06:00, Wed., 17 Jun. 0.0384 0.0343 0.0365
04:01-05:00, Wed., 17 Jun. 0.0384 0.0335 0.0364
03:01-04:00, Wed., 17 Jun. 0.0387 0.0344 0.0364
02:01-03:00, Wed., 17 Jun. 0.0384 0.0329 0.0360
01:01-02:00, Wed., 17 Jun. 0.0385 0.0341 0.0362
00:01-01:00, Wed., 17 Jun. 0.0386 0.0343 0.0364
22:01-23:00, Tue., 16 Jun. 0.0381 0.0343 0.0365
21:01-22:00, Tue., 16 Jun. 0.0395 0.0349 0.0366
20:01-21:00, Tue., 16 Jun. 0.0382 0.0340 0.0364
19:01-20:00, Tue., 16 Jun. 0.0392 0.0340 0.0363
18:01-19:00, Tue., 16 Jun. 0.0390 0.0340 0.0364
17:01-18:00, Tue., 16 Jun. 0.0386 0.0349 0.0365
16:01-17:00, Tue., 16 Jun. 0.0379 0.0346 0.0365
15:01-16:00, Tue., 16 Jun. 0.0391 0.0348 0.0368
14:01-15:00, Tue., 16 Jun. 0.0384 0.0342 0.0365
13:01-14:00, Tue., 16 Jun. 0.0391 0.0348 0.0365
12:01-13:00, Tue., 16 Jun. 0.0381 0.0338 0.0363
11:01-12:00, Tue., 16 Jun. 0.0388 0.0346 0.0366
10:01-11:00, Tue., 16 Jun. 0.0379 0.0347 0.0364
09:01-10:00, Tue., 16 Jun. 0.0391 0.0347 0.0365
08:01-09:00, Tue., 16 Jun. 0.0381 0.0346 0.0363
07:01-08:00, Tue., 16 Jun. 0.0388 0.0342 0.0363
06:01-07:00, Tue., 16 Jun. 0.0388 0.0339 0.0364
05:01-06:00, Tue., 16 Jun. 0.0384 0.0344 0.0362
04:01-05:00, Tue., 16 Jun. 0.0384 0.0339 0.0364
03:01-04:00, Tue., 16 Jun. 0.0382 0.0337 0.0364
02:01-03:00, Tue., 16 Jun. 0.0386 0.0343 0.0362
01:01-02:00, Tue., 16 Jun. 0.0381 0.0337 0.0360
00:01-01:00, Tue., 16 Jun. 0.0384 0.0338 0.0362
22:01-23:00, Mon., 15 Jun. 0.0385 0.0336 0.0362
21:01-22:00, Mon., 15 Jun. 0.0381 0.0343 0.0363
20:01-21:00, Mon., 15 Jun. 0.0388 0.0341 0.0362
19:01-20:00, Mon., 15 Jun. 0.0388 0.0348 0.0363
18:01-19:00, Mon., 15 Jun. 0.0396 0.0342 0.0364
17:01-18:00, Mon., 15 Jun. 0.0384 0.0344 0.0362
16:01-17:00, Mon., 15 Jun. 0.0387 0.0337 0.0361
15:01-16:00, Mon., 15 Jun. 0.0374 0.0338 0.0359
14:01-15:00, Mon., 15 Jun. 0.0383 0.0332 0.0362
13:01-14:00, Mon., 15 Jun. 0.0378 0.0343 0.0362
12:01-13:00, Mon., 15 Jun. 0.0381 0.0340 0.0362
11:01-12:00, Mon., 15 Jun. 0.0391 0.0344 0.0366
10:01-11:00, Mon., 15 Jun. 0.0379 0.0341 0.0363
09:01-10:00, Mon., 15 Jun. 0.0394 0.0349 0.0367
08:01-09:00, Mon., 15 Jun. 0.0412 0.0360 0.0382
07:01-08:00, Mon., 15 Jun. 0.0430 0.0378 0.0407
06:01-07:00, Mon., 15 Jun. 0.0436 0.0391 0.0412
05:01-06:00, Mon., 15 Jun. 0.0432 0.0393 0.0410
04:01-05:00, Mon., 15 Jun. 0.0428 0.0390 0.0406
03:01-04:00, Mon., 15 Jun. 0.0421 0.0368 0.0396
02:01-03:00, Mon., 15 Jun. 0.0406 0.0356 0.0382
01:01-02:00, Mon., 15 Jun. 0.0406 0.0363 0.0385
00:01-01:00, Mon., 15 Jun. 0.0404 0.0357 0.0380
22:01-23:00, Sun., 14 Jun. 0.0391 0.0340 0.0366
21:01-22:00, Sun., 14 Jun. 0.0383 0.0343 0.0367
20:01-21:00, Sun., 14 Jun. 0.0386 0.0339 0.0364
19:01-20:00, Sun., 14 Jun. 0.0381 0.0345 0.0365
18:01-19:00, Sun., 14 Jun. 0.0382 0.0341 0.0365
17:01-18:00, Sun., 14 Jun. 0.0399 0.0340 0.0366
16:01-17:00, Sun., 14 Jun. 0.0379 0.0341 0.0365
15:01-16:00, Sun., 14 Jun. 0.0388 0.0346 0.0366
14:01-15:00, Sun., 14 Jun. 0.0387 0.0345 0.0367
13:01-14:00, Sun., 14 Jun. 0.0389 0.0343 0.0367
12:01-13:00, Sun., 14 Jun. 0.0388 0.0347 0.0366
11:01-12:00, Sun., 14 Jun. 0.0391 0.0348 0.0365
10:01-11:00, Sun., 14 Jun. 0.0390 0.0348 0.0367
09:01-10:00, Sun., 14 Jun. 0.0396 0.0344 0.0366
08:01-09:00, Sun., 14 Jun. 0.0386 0.0343 0.0366
07:01-08:00, Sun., 14 Jun. 0.0383 0.0353 0.0366
06:01-07:00, Sun., 14 Jun. 0.0393 0.0350 0.0368
05:01-06:00, Sun., 14 Jun. 0.0385 0.0340 0.0368
04:01-05:00, Sun., 14 Jun. 0.0388 0.0341 0.0369
03:01-04:00, Sun., 14 Jun. 0.0393 0.0350 0.0368
02:01-03:00, Sun., 14 Jun. 0.0400 0.0345 0.0367
01:01-02:00, Sun., 14 Jun. 0.0383 0.0340 0.0365
00:01-01:00, Sun., 14 Jun. 0.0385 0.0346 0.0368
22:01-23:00, Sat., 13 Jun. 0.0385 0.0346 0.0365
21:01-22:00, Sat., 13 Jun. 0.0384 0.0345 0.0364
20:01-21:00, Sat., 13 Jun. 0.0389 0.0336 0.0364
19:01-20:00, Sat., 13 Jun. 0.0384 0.0341 0.0363
18:01-19:00, Sat., 13 Jun. 0.0392 0.0341 0.0366
17:01-18:00, Sat., 13 Jun. 0.0388 0.0340 0.0367
16:01-17:00, Sat., 13 Jun. 0.0388 0.0353 0.0370
15:01-16:00, Sat., 13 Jun. 0.0392 0.0347 0.0368
14:01-15:00, Sat., 13 Jun. 0.0395 0.0342 0.0365
13:01-14:00, Sat., 13 Jun. 0.0395 0.0348 0.0369
12:01-13:00, Sat., 13 Jun. 0.0385 0.0345 0.0368
11:01-12:00, Sat., 13 Jun. 0.0379 0.0347 0.0366
10:01-11:00, Sat., 13 Jun. 0.0390 0.0338 0.0364
09:01-10:00, Sat., 13 Jun. 0.0384 0.0340 0.0365
08:01-09:00, Sat., 13 Jun. 0.0386 0.0347 0.0366
07:01-08:00, Sat., 13 Jun. 0.0382 0.0343 0.0366
06:01-07:00, Sat., 13 Jun. 0.0388 0.0340 0.0365
05:01-06:00, Sat., 13 Jun. 0.0391 0.0333 0.0365
04:01-05:00, Sat., 13 Jun. 0.0393 0.0347 0.0367
03:01-04:00, Sat., 13 Jun. 0.0391 0.0347 0.0365
02:01-03:00, Sat., 13 Jun. 0.0384 0.0339 0.0366
01:01-02:00, Sat., 13 Jun. 0.0395 0.0338 0.0364
00:01-01:00, Sat., 13 Jun. 0.0391 0.0343 0.0365
22:01-23:00, Fri., 12 Jun. 0.0384 0.0340 0.0365
21:01-22:00, Fri., 12 Jun. 0.0391 0.0350 0.0366
20:01-21:00, Fri., 12 Jun. 0.0389 0.0344 0.0362
19:01-20:00, Fri., 12 Jun. 0.0381 0.0344 0.0364
18:01-19:00, Fri., 12 Jun. 0.0384 0.0342 0.0366
17:01-18:00, Fri., 12 Jun. 0.0388 0.0343 0.0371
16:01-17:00, Fri., 12 Jun. 0.0399 0.0354 0.0377
15:01-16:00, Fri., 12 Jun. 0.0444 0.0362 0.0399
14:01-15:00, Fri., 12 Jun. 0.0460 0.0387 0.0424
13:01-14:00, Fri., 12 Jun. 0.0396 0.0350 0.0370
12:01-13:00, Fri., 12 Jun. 0.0391 0.0337 0.0364
11:01-12:00, Fri., 12 Jun. 0.0384 0.0350 0.0365
10:01-11:00, Fri., 12 Jun. 0.0391 0.0350 0.0365
09:01-10:00, Fri., 12 Jun. 0.0395 0.0337 0.0363
08:01-09:00, Fri., 12 Jun. 0.0409 0.0340 0.0365
07:01-08:00, Fri., 12 Jun. 0.0392 0.0348 0.0366
06:01-07:00, Fri., 12 Jun. 0.0382 0.0348 0.0365
05:01-06:00, Fri., 12 Jun. 0.0395 0.0339 0.0365
04:01-05:00, Fri., 12 Jun. 0.0395 0.0339 0.0365
03:01-04:00, Fri., 12 Jun. 0.0381 0.0346 0.0365
02:01-03:00, Fri., 12 Jun. 0.0388 0.0343 0.0364
01:01-02:00, Fri., 12 Jun. 0.0385 0.0336 0.0364
00:01-01:00, Fri., 12 Jun. 0.0390 0.0341 0.0365
22:01-23:00, Thu., 11 Jun. 0.0384 0.0336 0.0362
21:01-22:00, Thu., 11 Jun. 0.0385 0.0343 0.0364
20:01-21:00, Thu., 11 Jun. 0.0385 0.0343 0.0363
19:01-20:00, Thu., 11 Jun. 0.0386 0.0336 0.0365
18:01-19:00, Thu., 11 Jun. 0.0384 0.0340 0.0364
17:01-18:00, Thu., 11 Jun. 0.0393 0.0339 0.0362