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
04:01-05:00, Sun., 27 Jul. 0.0389 0.0349 0.0373
03:01-04:00, Sun., 27 Jul. 0.0391 0.0346 0.0372
02:01-03:00, Sun., 27 Jul. 0.0395 0.0354 0.0371
01:01-02:00, Sun., 27 Jul. 0.0396 0.0341 0.0369
00:01-01:00, Sun., 27 Jul. 0.0391 0.0354 0.0372
23:01-24:00, Sat., 26 Jul. 0.0392 0.0346 0.0371
22:01-23:00, Sat., 26 Jul. 0.0397 0.0350 0.0371
21:01-22:00, Sat., 26 Jul. 0.0388 0.0353 0.0370
20:01-21:00, Sat., 26 Jul. 0.0393 0.0350 0.0371
19:01-20:00, Sat., 26 Jul. 0.0391 0.0352 0.0371
18:01-19:00, Sat., 26 Jul. 0.0385 0.0352 0.0370
17:01-18:00, Sat., 26 Jul. 0.0390 0.0350 0.0371
16:01-17:00, Sat., 26 Jul. 0.0399 0.0353 0.0369
15:01-16:00, Sat., 26 Jul. 0.0393 0.0328 0.0371
14:01-15:00, Sat., 26 Jul. 0.0386 0.0348 0.0370
13:01-14:00, Sat., 26 Jul. 0.0395 0.0349 0.0373
12:01-13:00, Sat., 26 Jul. 0.0391 0.0350 0.0372
11:01-12:00, Sat., 26 Jul. 0.0397 0.0347 0.0371
10:01-11:00, Sat., 26 Jul. 0.0389 0.0350 0.0372
09:01-10:00, Sat., 26 Jul. 0.0395 0.0353 0.0373
08:01-09:00, Sat., 26 Jul. 0.0393 0.0353 0.0374
07:01-08:00, Sat., 26 Jul. 0.0402 0.0353 0.0374
06:01-07:00, Sat., 26 Jul. 0.0400 0.0353 0.0371
05:01-06:00, Sat., 26 Jul. 0.0393 0.0343 0.0369
04:01-05:00, Sat., 26 Jul. 0.0400 0.0352 0.0372
03:01-04:00, Sat., 26 Jul. 0.0398 0.0348 0.0374
02:01-03:00, Sat., 26 Jul. 0.0392 0.0347 0.0371
01:01-02:00, Sat., 26 Jul. 0.0395 0.0352 0.0371
00:01-01:00, Sat., 26 Jul. 0.0384 0.0352 0.0369
23:01-24:00, Fri., 25 Jul. 0.0398 0.0343 0.0370
22:01-23:00, Fri., 25 Jul. 0.0395 0.0350 0.0370
21:01-22:00, Fri., 25 Jul. 0.0390 0.0351 0.0372
20:01-21:00, Fri., 25 Jul. 0.0388 0.0354 0.0369
19:01-20:00, Fri., 25 Jul. 0.0390 0.0350 0.0371
18:01-19:00, Fri., 25 Jul. 0.0400 0.0344 0.0371
17:01-18:00, Fri., 25 Jul. 0.0391 0.0348 0.0368
16:01-17:00, Fri., 25 Jul. 0.0393 0.0346 0.0371
15:01-16:00, Fri., 25 Jul. 0.0395 0.0356 0.0371
14:01-15:00, Fri., 25 Jul. 0.0392 0.0345 0.0372
13:01-14:00, Fri., 25 Jul. 0.0393 0.0347 0.0372
12:01-13:00, Fri., 25 Jul. 0.0400 0.0350 0.0374
11:01-12:00, Fri., 25 Jul. 0.0396 0.0350 0.0372
10:01-11:00, Fri., 25 Jul. 0.0396 0.0353 0.0372
09:01-10:00, Fri., 25 Jul. 0.0394 0.0347 0.0368
08:01-09:00, Fri., 25 Jul. 0.0400 0.0353 0.0373
07:01-08:00, Fri., 25 Jul. 0.0398 0.0357 0.0375
06:01-07:00, Fri., 25 Jul. 0.0397 0.0350 0.0372
05:01-06:00, Fri., 25 Jul. 0.0398 0.0347 0.0370
04:01-05:00, Fri., 25 Jul. 0.0391 0.0350 0.0370
03:01-04:00, Fri., 25 Jul. 0.0395 0.0350 0.0370
02:01-03:00, Fri., 25 Jul. 0.0395 0.0347 0.0370
01:01-02:00, Fri., 25 Jul. 0.0391 0.0346 0.0369
00:01-01:00, Fri., 25 Jul. 0.0389 0.0347 0.0371
23:01-24:00, Thu., 24 Jul. 0.0402 0.0350 0.0372
22:01-23:00, Thu., 24 Jul. 0.0396 0.0349 0.0370
21:01-22:00, Thu., 24 Jul. 0.0391 0.0352 0.0370
20:01-21:00, Thu., 24 Jul. 0.0391 0.0346 0.0368
19:01-20:00, Thu., 24 Jul. 0.0388 0.0353 0.0370
18:01-19:00, Thu., 24 Jul. 0.0383 0.0347 0.0368
17:01-18:00, Thu., 24 Jul. 0.0384 0.0342 0.0366
16:01-17:00, Thu., 24 Jul. 0.0386 0.0348 0.0370
15:01-16:00, Thu., 24 Jul. 0.0388 0.0353 0.0369
14:01-15:00, Thu., 24 Jul. 0.0388 0.0345 0.0371
13:01-14:00, Thu., 24 Jul. 0.0395 0.0350 0.0372
12:01-13:00, Thu., 24 Jul. 0.0397 0.0353 0.0374
11:01-12:00, Thu., 24 Jul. 0.0401 0.0351 0.0372
10:01-11:00, Thu., 24 Jul. 0.0408 0.0346 0.0372
09:01-10:00, Thu., 24 Jul. 0.0398 0.0350 0.0373
08:01-09:00, Thu., 24 Jul. 0.0395 0.0347 0.0371
07:01-08:00, Thu., 24 Jul. 0.0393 0.0353 0.0372
06:01-07:00, Thu., 24 Jul. 0.0397 0.0353 0.0372
05:01-06:00, Thu., 24 Jul. 0.0391 0.0350 0.0370
04:01-05:00, Thu., 24 Jul. 0.0396 0.0348 0.0370
03:01-04:00, Thu., 24 Jul. 0.0396 0.0349 0.0370
02:01-03:00, Thu., 24 Jul. 0.0386 0.0347 0.0367
01:01-02:00, Thu., 24 Jul. 0.0392 0.0345 0.0366
00:01-01:00, Thu., 24 Jul. 0.0388 0.0338 0.0367
23:01-24:00, Wed., 23 Jul. 0.0386 0.0349 0.0367
22:01-23:00, Wed., 23 Jul. 0.0390 0.0344 0.0370
21:01-22:00, Wed., 23 Jul. 0.0395 0.0343 0.0369
20:01-21:00, Wed., 23 Jul. 0.0395 0.0346 0.0369
19:01-20:00, Wed., 23 Jul. 0.0391 0.0340 0.0368
18:01-19:00, Wed., 23 Jul. 0.0394 0.0344 0.0368
17:01-18:00, Wed., 23 Jul. 0.0389 0.0350 0.0367
16:01-17:00, Wed., 23 Jul. 0.0386 0.0343 0.0367
15:01-16:00, Wed., 23 Jul. 0.0396 0.0350 0.0369
14:01-15:00, Wed., 23 Jul. 0.0390 0.0353 0.0369
13:01-14:00, Wed., 23 Jul. 0.0396 0.0353 0.0371
12:01-13:00, Wed., 23 Jul. 0.0390 0.0349 0.0370
11:01-12:00, Wed., 23 Jul. 0.0384 0.0345 0.0369
10:01-11:00, Wed., 23 Jul. 0.0391 0.0350 0.0370
09:01-10:00, Wed., 23 Jul. 0.0390 0.0348 0.0370
08:01-09:00, Wed., 23 Jul. 0.0391 0.0349 0.0370
07:01-08:00, Wed., 23 Jul. 0.0387 0.0349 0.0369
06:01-07:00, Wed., 23 Jul. 0.0395 0.0350 0.0370
05:01-06:00, Wed., 23 Jul. 0.0391 0.0344 0.0367
04:01-05:00, Wed., 23 Jul. 0.0390 0.0348 0.0368
03:01-04:00, Wed., 23 Jul. 0.0390 0.0346 0.0367
02:01-03:00, Wed., 23 Jul. 0.0393 0.0336 0.0368
01:01-02:00, Wed., 23 Jul. 0.0391 0.0347 0.0369
00:01-01:00, Wed., 23 Jul. 0.0382 0.0347 0.0367
23:01-24:00, Tue., 22 Jul. 0.0388 0.0353 0.0368
22:01-23:00, Tue., 22 Jul. 0.0402 0.0351 0.0368
21:01-22:00, Tue., 22 Jul. 0.0390 0.0338 0.0366
20:01-21:00, Tue., 22 Jul. 0.0388 0.0349 0.0369
19:01-20:00, Tue., 22 Jul. 0.0383 0.0345 0.0366
18:01-19:00, Tue., 22 Jul. 0.0391 0.0344 0.0365
17:01-18:00, Tue., 22 Jul. 0.0388 0.0343 0.0369
16:01-17:00, Tue., 22 Jul. 0.0385 0.0350 0.0367
15:01-16:00, Tue., 22 Jul. 0.0385 0.0347 0.0368
14:01-15:00, Tue., 22 Jul. 0.0385 0.0333 0.0368
13:01-14:00, Tue., 22 Jul. 0.0400 0.0350 0.0369
12:01-13:00, Tue., 22 Jul. 0.0392 0.0352 0.0370
11:01-12:00, Tue., 22 Jul. 0.0393 0.0347 0.0372
10:01-11:00, Tue., 22 Jul. 0.0388 0.0352 0.0369
09:01-10:00, Tue., 22 Jul. 0.0391 0.0353 0.0368
08:01-09:00, Tue., 22 Jul. 0.0396 0.0346 0.0367
07:01-08:00, Tue., 22 Jul. 0.0395 0.0348 0.0370
06:01-07:00, Tue., 22 Jul. 0.0395 0.0350 0.0368
05:01-06:00, Tue., 22 Jul. 0.0394 0.0347 0.0369
04:01-05:00, Tue., 22 Jul. 0.0391 0.0346 0.0368
03:01-04:00, Tue., 22 Jul. 0.0391 0.0346 0.0368
02:01-03:00, Tue., 22 Jul. 0.0381 0.0340 0.0367
01:01-02:00, Tue., 22 Jul. 0.0391 0.0346 0.0370
00:01-01:00, Tue., 22 Jul. 0.0401 0.0334 0.0369
23:01-24:00, Mon., 21 Jul. 0.0388 0.0344 0.0369
22:01-23:00, Mon., 21 Jul. 0.0388 0.0343 0.0367
21:01-22:00, Mon., 21 Jul. 0.0395 0.0351 0.0371
20:01-21:00, Mon., 21 Jul. 0.0398 0.0346 0.0369
19:01-20:00, Mon., 21 Jul. 0.0391 0.0347 0.0370
18:01-19:00, Mon., 21 Jul. 0.0395 0.0343 0.0368
17:01-18:00, Mon., 21 Jul. 0.0388 0.0340 0.0367
16:01-17:00, Mon., 21 Jul. 0.0388 0.0340 0.0367
15:01-16:00, Mon., 21 Jul. 0.0384 0.0352 0.0370
14:01-15:00, Mon., 21 Jul. 0.0395 0.0340 0.0369
13:01-14:00, Mon., 21 Jul. 0.0396 0.0350 0.0370
12:01-13:00, Mon., 21 Jul. 0.0393 0.0344 0.0368
11:01-12:00, Mon., 21 Jul. 0.0398 0.0338 0.0373
10:01-11:00, Mon., 21 Jul. 0.0396 0.0353 0.0369
09:01-10:00, Mon., 21 Jul. 0.0393 0.0344 0.0367
08:01-09:00, Mon., 21 Jul. 0.0391 0.0350 0.0368
07:01-08:00, Mon., 21 Jul. 0.0394 0.0344 0.0367
06:01-07:00, Mon., 21 Jul. 0.0395 0.0347 0.0367
05:01-06:00, Mon., 21 Jul. 0.0389 0.0347 0.0367
04:01-05:00, Mon., 21 Jul. 0.0391 0.0345 0.0369
03:01-04:00, Mon., 21 Jul. 0.0391 0.0348 0.0369
02:01-03:00, Mon., 21 Jul. 0.0393 0.0346 0.0368
01:01-02:00, Mon., 21 Jul. 0.0391 0.0339 0.0365
00:01-01:00, Mon., 21 Jul. 0.0391 0.0334 0.0365
23:01-24:00, Sun., 20 Jul. 0.0384 0.0343 0.0366
22:01-23:00, Sun., 20 Jul. 0.0381 0.0347 0.0366
21:01-22:00, Sun., 20 Jul. 0.0385 0.0346 0.0366
20:01-21:00, Sun., 20 Jul. 0.0398 0.0351 0.0370
19:01-20:00, Sun., 20 Jul. 0.0390 0.0347 0.0369
18:01-19:00, Sun., 20 Jul. 0.0387 0.0350 0.0369
17:01-18:00, Sun., 20 Jul. 0.0393 0.0344 0.0366
16:01-17:00, Sun., 20 Jul. 0.0391 0.0348 0.0368
15:01-16:00, Sun., 20 Jul. 0.0391 0.0349 0.0369
14:01-15:00, Sun., 20 Jul. 0.0389 0.0349 0.0368
13:01-14:00, Sun., 20 Jul. 0.0382 0.0355 0.0366
12:01-13:00, Sun., 20 Jul. 0.0390 0.0344 0.0368
11:01-12:00, Sun., 20 Jul. 0.0391 0.0348 0.0368
10:01-11:00, Sun., 20 Jul. 0.0397 0.0346 0.0365
09:01-10:00, Sun., 20 Jul. 0.0389 0.0348 0.0367
08:01-09:00, Sun., 20 Jul. 0.0383 0.0343 0.0365
07:01-08:00, Sun., 20 Jul. 0.0384 0.0348 0.0367
06:01-07:00, Sun., 20 Jul. 0.0390 0.0347 0.0364
05:01-06:00, Sun., 20 Jul. 0.0384 0.0340 0.0366
04:01-05:00, Sun., 20 Jul. 0.0388 0.0336 0.0365
03:01-04:00, Sun., 20 Jul. 0.0383 0.0343 0.0365
02:01-03:00, Sun., 20 Jul. 0.0391 0.0353 0.0368
01:01-02:00, Sun., 20 Jul. 0.0395 0.0344 0.0368
00:01-01:00, Sun., 20 Jul. 0.0392 0.0343 0.0365
23:01-24:00, Sat., 19 Jul. 0.0389 0.0343 0.0366
22:01-23:00, Sat., 19 Jul. 0.0385 0.0341 0.0367
21:01-22:00, Sat., 19 Jul. 0.0387 0.0335 0.0366
20:01-21:00, Sat., 19 Jul. 0.0390 0.0343 0.0367
19:01-20:00, Sat., 19 Jul. 0.0393 0.0344 0.0368
18:01-19:00, Sat., 19 Jul. 0.0385 0.0348 0.0365
17:01-18:00, Sat., 19 Jul. 0.0391 0.0336 0.0367
16:01-17:00, Sat., 19 Jul. 0.0395 0.0346 0.0368
15:01-16:00, Sat., 19 Jul. 0.0398 0.0346 0.0367
14:01-15:00, Sat., 19 Jul. 0.0390 0.0351 0.0368
13:01-14:00, Sat., 19 Jul. 0.0388 0.0343 0.0366
12:01-13:00, Sat., 19 Jul. 0.0385 0.0345 0.0365
11:01-12:00, Sat., 19 Jul. 0.0388 0.0342 0.0365
10:01-11:00, Sat., 19 Jul. 0.0392 0.0346 0.0365
09:01-10:00, Sat., 19 Jul. 0.0384 0.0345 0.0363
08:01-09:00, Sat., 19 Jul. 0.0382 0.0340 0.0363
07:01-08:00, Sat., 19 Jul. 0.0387 0.0338 0.0363
06:01-07:00, Sat., 19 Jul. 0.0390 0.0345 0.0363
05:01-06:00, Sat., 19 Jul. 0.0395 0.0346 0.0363
04:01-05:00, Sat., 19 Jul. 0.0382 0.0343 0.0363
03:01-04:00, Sat., 19 Jul. 0.0394 0.0336 0.0362
02:01-03:00, Sat., 19 Jul. 0.0391 0.0347 0.0365
01:01-02:00, Sat., 19 Jul. 0.0394 0.0342 0.0366
00:01-01:00, Sat., 19 Jul. 0.0385 0.0345 0.0361
23:01-24:00, Fri., 18 Jul. 0.0381 0.0340 0.0361
22:01-23:00, Fri., 18 Jul. 0.0383 0.0340 0.0365
21:01-22:00, Fri., 18 Jul. 0.0393 0.0337 0.0365
20:01-21:00, Fri., 18 Jul. 0.0387 0.0347 0.0367
19:01-20:00, Fri., 18 Jul. 0.0395 0.0347 0.0365
18:01-19:00, Fri., 18 Jul. 0.0391 0.0348 0.0367
17:01-18:00, Fri., 18 Jul. 0.0384 0.0333 0.0362
16:01-17:00, Fri., 18 Jul. 0.0395 0.0351 0.0368
15:01-16:00, Fri., 18 Jul. 0.0391 0.0342 0.0366
14:01-15:00, Fri., 18 Jul. 0.0382 0.0340 0.0365
13:01-14:00, Fri., 18 Jul. 0.0391 0.0347 0.0365
12:01-13:00, Fri., 18 Jul. 0.0388 0.0343 0.0365
11:01-12:00, Fri., 18 Jul. 0.0384 0.0339 0.0361
10:01-11:00, Fri., 18 Jul. 0.0393 0.0339 0.0362
09:01-10:00, Fri., 18 Jul. 0.0376 0.0343 0.0360
08:01-09:00, Fri., 18 Jul. 0.0385 0.0343 0.0363
07:01-08:00, Fri., 18 Jul. 0.0377 0.0341 0.0360
06:01-07:00, Fri., 18 Jul. 0.0380 0.0333 0.0360
05:01-06:00, Fri., 18 Jul. 0.0382 0.0333 0.0362
04:01-05:00, Fri., 18 Jul. 0.0395 0.0343 0.0363
03:01-04:00, Fri., 18 Jul. 0.0384 0.0343 0.0363
02:01-03:00, Fri., 18 Jul. 0.0391 0.0336 0.0363
01:01-02:00, Fri., 18 Jul. 0.0379 0.0344 0.0361
00:01-01:00, Fri., 18 Jul. 0.0383 0.0350 0.0362
23:01-24:00, Thu., 17 Jul. 0.0388 0.0347 0.0361
22:01-23:00, Thu., 17 Jul. 0.0383 0.0341 0.0363
21:01-22:00, Thu., 17 Jul. 0.0384 0.0333 0.0363
20:01-21:00, Thu., 17 Jul. 0.0385 0.0347 0.0361
19:01-20:00, Thu., 17 Jul. 0.0388 0.0346 0.0362
18:01-19:00, Thu., 17 Jul. 0.0388 0.0342 0.0363
17:01-18:00, Thu., 17 Jul. 0.0382 0.0344 0.0363
16:01-17:00, Thu., 17 Jul. 0.0384 0.0330 0.0363
15:01-16:00, Thu., 17 Jul. 0.0384 0.0339 0.0363
14:01-15:00, Thu., 17 Jul. 0.0381 0.0343 0.0363
13:01-14:00, Thu., 17 Jul. 0.0386 0.0345 0.0363
12:01-13:00, Thu., 17 Jul. 0.0380 0.0336 0.0362
11:01-12:00, Thu., 17 Jul. 0.0384 0.0340 0.0360
10:01-11:00, Thu., 17 Jul. 0.0380 0.0340 0.0361
09:01-10:00, Thu., 17 Jul. 0.0388 0.0342 0.0362
08:01-09:00, Thu., 17 Jul. 0.0395 0.0331 0.0358
07:01-08:00, Thu., 17 Jul. 0.0381 0.0336 0.0357
06:01-07:00, Thu., 17 Jul. 0.0379 0.0334 0.0358
05:01-06:00, Thu., 17 Jul. 0.0391 0.0335 0.0359