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
14:01-15:00, Mon., 01 Jun. 0.0397 0.0351 0.0374
13:01-14:00, Mon., 01 Jun. 0.0395 0.0354 0.0375
12:01-13:00, Mon., 01 Jun. 0.0389 0.0346 0.0373
11:01-12:00, Mon., 01 Jun. 0.0395 0.0350 0.0374
10:01-11:00, Mon., 01 Jun. 0.0390 0.0353 0.0372
09:01-10:00, Mon., 01 Jun. 0.0396 0.0358 0.0373
08:01-09:00, Mon., 01 Jun. 0.0389 0.0347 0.0370
07:01-08:00, Mon., 01 Jun. 0.0397 0.0354 0.0373
06:01-07:00, Mon., 01 Jun. 0.0398 0.0358 0.0375
05:01-06:00, Mon., 01 Jun. 0.0392 0.0345 0.0372
04:01-05:00, Mon., 01 Jun. 0.0395 0.0343 0.0373
03:01-04:00, Mon., 01 Jun. 0.0395 0.0344 0.0372
02:01-03:00, Mon., 01 Jun. 0.0391 0.0349 0.0370
01:01-02:00, Mon., 01 Jun. 0.0396 0.0353 0.0371
00:01-01:00, Mon., 01 Jun. 0.0390 0.0347 0.0370
23:01-24:00, Sun., 31 May. 0.0391 0.0305 0.0370
22:01-23:00, Sun., 31 May. 0.0401 0.0352 0.0372
21:01-22:00, Sun., 31 May. 0.0396 0.0359 0.0374
20:01-21:00, Sun., 31 May. 0.0394 0.0353 0.0373
19:01-20:00, Sun., 31 May. 0.0402 0.0357 0.0375
18:01-19:00, Sun., 31 May. 0.0395 0.0347 0.0373
17:01-18:00, Sun., 31 May. 0.0395 0.0345 0.0372
16:01-17:00, Sun., 31 May. 0.0404 0.0357 0.0373
15:01-16:00, Sun., 31 May. 0.0396 0.0351 0.0376
14:01-15:00, Sun., 31 May. 0.0395 0.0357 0.0375
13:01-14:00, Sun., 31 May. 0.0395 0.0352 0.0373
12:01-13:00, Sun., 31 May. 0.0391 0.0354 0.0375
11:01-12:00, Sun., 31 May. 0.0389 0.0349 0.0373
10:01-11:00, Sun., 31 May. 0.0394 0.0350 0.0371
09:01-10:00, Sun., 31 May. 0.0395 0.0354 0.0373
08:01-09:00, Sun., 31 May. 0.0397 0.0357 0.0374
07:01-08:00, Sun., 31 May. 0.0395 0.0356 0.0375
06:01-07:00, Sun., 31 May. 0.0403 0.0350 0.0371
05:01-06:00, Sun., 31 May. 0.0394 0.0356 0.0371
04:01-05:00, Sun., 31 May. 0.0386 0.0342 0.0369
03:01-04:00, Sun., 31 May. 0.0395 0.0351 0.0371
02:01-03:00, Sun., 31 May. 0.0391 0.0351 0.0372
01:01-02:00, Sun., 31 May. 0.0391 0.0347 0.0374
00:01-01:00, Sun., 31 May. 0.0396 0.0346 0.0372
23:01-24:00, Sat., 30 May. 0.0392 0.0350 0.0368
22:01-23:00, Sat., 30 May. 0.0388 0.0351 0.0369
21:01-22:00, Sat., 30 May. 0.0386 0.0346 0.0370
20:01-21:00, Sat., 30 May. 0.0395 0.0356 0.0374
19:01-20:00, Sat., 30 May. 0.0393 0.0349 0.0369
18:01-19:00, Sat., 30 May. 0.0391 0.0353 0.0372
17:01-18:00, Sat., 30 May. 0.0402 0.0353 0.0373
16:01-17:00, Sat., 30 May. 0.0392 0.0353 0.0373
15:01-16:00, Sat., 30 May. 0.0399 0.0355 0.0375
14:01-15:00, Sat., 30 May. 0.0391 0.0351 0.0375
13:01-14:00, Sat., 30 May. 0.0400 0.0353 0.0374
12:01-13:00, Sat., 30 May. 0.0391 0.0354 0.0374
11:01-12:00, Sat., 30 May. 0.0398 0.0353 0.0372
10:01-11:00, Sat., 30 May. 0.0391 0.0352 0.0372
09:01-10:00, Sat., 30 May. 0.0391 0.0350 0.0371
08:01-09:00, Sat., 30 May. 0.0392 0.0353 0.0371
07:01-08:00, Sat., 30 May. 0.0387 0.0347 0.0371
06:01-07:00, Sat., 30 May. 0.0388 0.0341 0.0370
05:01-06:00, Sat., 30 May. 0.0389 0.0349 0.0371
04:01-05:00, Sat., 30 May. 0.0393 0.0352 0.0370
03:01-04:00, Sat., 30 May. 0.0395 0.0344 0.0371
02:01-03:00, Sat., 30 May. 0.0391 0.0351 0.0372
01:01-02:00, Sat., 30 May. 0.0388 0.0350 0.0370
00:01-01:00, Sat., 30 May. 0.0388 0.0339 0.0370
23:01-24:00, Fri., 29 May. 0.0394 0.0344 0.0369
22:01-23:00, Fri., 29 May. 0.0401 0.0353 0.0369
21:01-22:00, Fri., 29 May. 0.0393 0.0344 0.0370
20:01-21:00, Fri., 29 May. 0.0390 0.0349 0.0370
19:01-20:00, Fri., 29 May. 0.0388 0.0352 0.0369
18:01-19:00, Fri., 29 May. 0.0387 0.0352 0.0369
17:01-18:00, Fri., 29 May. 0.0385 0.0352 0.0370
16:01-17:00, Fri., 29 May. 0.0402 0.0344 0.0369
15:01-16:00, Fri., 29 May. 0.0398 0.0352 0.0373
14:01-15:00, Fri., 29 May. 0.0402 0.0358 0.0376
13:01-14:00, Fri., 29 May. 0.0390 0.0353 0.0373
12:01-13:00, Fri., 29 May. 0.0400 0.0357 0.0376
11:01-12:00, Fri., 29 May. 0.0388 0.0358 0.0375
10:01-11:00, Fri., 29 May. 0.0391 0.0347 0.0374
09:01-10:00, Fri., 29 May. 0.0397 0.0340 0.0372
08:01-09:00, Fri., 29 May. 0.0398 0.0346 0.0373
07:01-08:00, Fri., 29 May. 0.0394 0.0350 0.0372
06:01-07:00, Fri., 29 May. 0.0398 0.0352 0.0374
05:01-06:00, Fri., 29 May. 0.0389 0.0354 0.0370
04:01-05:00, Fri., 29 May. 0.0400 0.0353 0.0369
03:01-04:00, Fri., 29 May. 0.0395 0.0347 0.0368
02:01-03:00, Fri., 29 May. 0.0390 0.0343 0.0366
01:01-02:00, Fri., 29 May. 0.0393 0.0346 0.0368
00:01-01:00, Fri., 29 May. 0.0388 0.0345 0.0370
23:01-24:00, Thu., 28 May. 0.0387 0.0349 0.0369
22:01-23:00, Thu., 28 May. 0.0388 0.0353 0.0368
21:01-22:00, Thu., 28 May. 0.0393 0.0350 0.0370
20:01-21:00, Thu., 28 May. 0.0384 0.0350 0.0368
19:01-20:00, Thu., 28 May. 0.0386 0.0341 0.0367
18:01-19:00, Thu., 28 May. 0.0395 0.0351 0.0368
17:01-18:00, Thu., 28 May. 0.0393 0.0352 0.0370
16:01-17:00, Thu., 28 May. 0.0393 0.0352 0.0369
15:01-16:00, Thu., 28 May. 0.0388 0.0349 0.0368
14:01-15:00, Thu., 28 May. 0.0398 0.0337 0.0366
13:01-14:00, Thu., 28 May. 0.0387 0.0344 0.0367
12:01-13:00, Thu., 28 May. 0.0386 0.0351 0.0367
11:01-12:00, Thu., 28 May. 0.0381 0.0349 0.0367
10:01-11:00, Thu., 28 May. 0.0388 0.0352 0.0366
09:01-10:00, Thu., 28 May. 0.0395 0.0343 0.0367
08:01-09:00, Thu., 28 May. 0.0388 0.0345 0.0368
07:01-08:00, Thu., 28 May. 0.0386 0.0347 0.0366
06:01-07:00, Thu., 28 May. 0.0389 0.0352 0.0367
05:01-06:00, Thu., 28 May. 0.0385 0.0340 0.0367
04:01-05:00, Thu., 28 May. 0.0382 0.0345 0.0365
03:01-04:00, Thu., 28 May. 0.0392 0.0343 0.0366
02:01-03:00, Thu., 28 May. 0.0398 0.0350 0.0368
01:01-02:00, Thu., 28 May. 0.0388 0.0343 0.0365
00:01-01:00, Thu., 28 May. 0.0384 0.0346 0.0365
23:01-24:00, Wed., 27 May. 0.0388 0.0346 0.0365
22:01-23:00, Wed., 27 May. 0.0380 0.0341 0.0360
21:01-22:00, Wed., 27 May. 0.0382 0.0332 0.0364
20:01-21:00, Wed., 27 May. 0.0384 0.0345 0.0366
19:01-20:00, Wed., 27 May. 0.0385 0.0348 0.0366
18:01-19:00, Wed., 27 May. 0.0386 0.0346 0.0367
17:01-18:00, Wed., 27 May. 0.0394 0.0343 0.0370
16:01-17:00, Wed., 27 May. 0.0387 0.0347 0.0365
15:01-16:00, Wed., 27 May. 0.0391 0.0352 0.0367
14:01-15:00, Wed., 27 May. 0.0391 0.0347 0.0367
13:01-14:00, Wed., 27 May. 0.0387 0.0335 0.0367
12:01-13:00, Wed., 27 May. 0.0387 0.0336 0.0366
11:01-12:00, Wed., 27 May. 0.0383 0.0344 0.0365
10:01-11:00, Wed., 27 May. 0.0388 0.0347 0.0364
09:01-10:00, Wed., 27 May. 0.0383 0.0343 0.0365
08:01-09:00, Wed., 27 May. 0.0381 0.0336 0.0365
07:01-08:00, Wed., 27 May. 0.0390 0.0339 0.0365
06:01-07:00, Wed., 27 May. 0.0385 0.0343 0.0365
05:01-06:00, Wed., 27 May. 0.0390 0.0344 0.0365
04:01-05:00, Wed., 27 May. 0.0383 0.0336 0.0364
03:01-04:00, Wed., 27 May. 0.0394 0.0335 0.0363
02:01-03:00, Wed., 27 May. 0.0391 0.0340 0.0364
01:01-02:00, Wed., 27 May. 0.0395 0.0340 0.0363
00:01-01:00, Wed., 27 May. 0.0398 0.0334 0.0364
23:01-24:00, Tue., 26 May. 0.0388 0.0347 0.0365
22:01-23:00, Tue., 26 May. 0.0384 0.0344 0.0363
21:01-22:00, Tue., 26 May. 0.0381 0.0343 0.0363
20:01-21:00, Tue., 26 May. 0.0388 0.0330 0.0365
19:01-20:00, Tue., 26 May. 0.0384 0.0337 0.0366
18:01-19:00, Tue., 26 May. 0.0391 0.0340 0.0365
17:01-18:00, Tue., 26 May. 0.0393 0.0348 0.0367
16:01-17:00, Tue., 26 May. 0.0391 0.0341 0.0368
15:01-16:00, Tue., 26 May. 0.0388 0.0351 0.0368
14:01-15:00, Tue., 26 May. 0.0392 0.0347 0.0369
13:01-14:00, Tue., 26 May. 0.0388 0.0340 0.0367
12:01-13:00, Tue., 26 May. 0.0388 0.0343 0.0366
11:01-12:00, Tue., 26 May. 0.0380 0.0348 0.0364
10:01-11:00, Tue., 26 May. 0.0383 0.0340 0.0365
09:01-10:00, Tue., 26 May. 0.0384 0.0333 0.0363
08:01-09:00, Tue., 26 May. 0.0388 0.0345 0.0366
07:01-08:00, Tue., 26 May. 0.0374 0.0336 0.0361
06:01-07:00, Tue., 26 May. 0.0384 0.0336 0.0363
05:01-06:00, Tue., 26 May. 0.0391 0.0340 0.0365
04:01-05:00, Tue., 26 May. 0.0385 0.0343 0.0365
03:01-04:00, Tue., 26 May. 0.0384 0.0347 0.0365
02:01-03:00, Tue., 26 May. 0.0379 0.0346 0.0361
01:01-02:00, Tue., 26 May. 0.0388 0.0348 0.0364
00:01-01:00, Tue., 26 May. 0.0378 0.0339 0.0363
23:01-24:00, Mon., 25 May. 0.0387 0.0344 0.0363
22:01-23:00, Mon., 25 May. 0.0391 0.0345 0.0363
21:01-22:00, Mon., 25 May. 0.0387 0.0340 0.0363
20:01-21:00, Mon., 25 May. 0.0395 0.0343 0.0365
19:01-20:00, Mon., 25 May. 0.0389 0.0343 0.0364
18:01-19:00, Mon., 25 May. 0.0395 0.0339 0.0367
17:01-18:00, Mon., 25 May. 0.0384 0.0344 0.0366
16:01-17:00, Mon., 25 May. 0.0384 0.0350 0.0367
15:01-16:00, Mon., 25 May. 0.0392 0.0348 0.0368
14:01-15:00, Mon., 25 May. 0.0391 0.0342 0.0367
13:01-14:00, Mon., 25 May. 0.0384 0.0341 0.0366
12:01-13:00, Mon., 25 May. 0.0382 0.0345 0.0363
11:01-12:00, Mon., 25 May. 0.0388 0.0343 0.0364
10:01-11:00, Mon., 25 May. 0.0392 0.0343 0.0360
09:01-10:00, Mon., 25 May. 0.0382 0.0342 0.0363
08:01-09:00, Mon., 25 May. 0.0391 0.0340 0.0363
07:01-08:00, Mon., 25 May. 0.0396 0.0337 0.0363
06:01-07:00, Mon., 25 May. 0.0384 0.0345 0.0364
05:01-06:00, Mon., 25 May. 0.0382 0.0337 0.0363
04:01-05:00, Mon., 25 May. 0.0388 0.0341 0.0362
03:01-04:00, Mon., 25 May. 0.0384 0.0338 0.0364
02:01-03:00, Mon., 25 May. 0.0385 0.0342 0.0363
01:01-02:00, Mon., 25 May. 0.0398 0.0343 0.0365
00:01-01:00, Mon., 25 May. 0.0378 0.0340 0.0361
23:01-24:00, Sun., 24 May. 0.0388 0.0340 0.0365
22:01-23:00, Sun., 24 May. 0.0390 0.0341 0.0364
21:01-22:00, Sun., 24 May. 0.0380 0.0342 0.0363
20:01-21:00, Sun., 24 May. 0.0381 0.0347 0.0362
19:01-20:00, Sun., 24 May. 0.0390 0.0341 0.0364
18:01-19:00, Sun., 24 May. 0.0385 0.0344 0.0361
17:01-18:00, Sun., 24 May. 0.0381 0.0346 0.0363
16:01-17:00, Sun., 24 May. 0.0382 0.0342 0.0363
15:01-16:00, Sun., 24 May. 0.0386 0.0343 0.0364
14:01-15:00, Sun., 24 May. 0.0382 0.0338 0.0366
13:01-14:00, Sun., 24 May. 0.0384 0.0344 0.0364
12:01-13:00, Sun., 24 May. 0.0381 0.0339 0.0363
11:01-12:00, Sun., 24 May. 0.0383 0.0347 0.0363
10:01-11:00, Sun., 24 May. 0.0386 0.0344 0.0362
09:01-10:00, Sun., 24 May. 0.0386 0.0339 0.0364
08:01-09:00, Sun., 24 May. 0.0382 0.0337 0.0361
07:01-08:00, Sun., 24 May. 0.0391 0.0331 0.0362
06:01-07:00, Sun., 24 May. 0.0384 0.0347 0.0363
05:01-06:00, Sun., 24 May. 0.0384 0.0337 0.0362
04:01-05:00, Sun., 24 May. 0.0388 0.0350 0.0363
03:01-04:00, Sun., 24 May. 0.0385 0.0343 0.0364
02:01-03:00, Sun., 24 May. 0.0398 0.0350 0.0370
01:01-02:00, Sun., 24 May. 0.0397 0.0357 0.0379
00:01-01:00, Sun., 24 May. 0.0396 0.0343 0.0365
23:01-24:00, Sat., 23 May. 0.0391 0.0336 0.0361
22:01-23:00, Sat., 23 May. 0.0381 0.0340 0.0362
21:01-22:00, Sat., 23 May. 0.0386 0.0334 0.0360
20:01-21:00, Sat., 23 May. 0.0381 0.0339 0.0362
19:01-20:00, Sat., 23 May. 0.0386 0.0343 0.0362
18:01-19:00, Sat., 23 May. 0.0388 0.0340 0.0365
17:01-18:00, Sat., 23 May. 0.0386 0.0342 0.0362
16:01-17:00, Sat., 23 May. 0.0383 0.0342 0.0362
15:01-16:00, Sat., 23 May. 0.0383 0.0346 0.0362
14:01-15:00, Sat., 23 May. 0.0390 0.0338 0.0360
13:01-14:00, Sat., 23 May. 0.0391 0.0341 0.0363
12:01-13:00, Sat., 23 May. 0.0379 0.0340 0.0362
11:01-12:00, Sat., 23 May. 0.0385 0.0333 0.0361
10:01-11:00, Sat., 23 May. 0.0384 0.0340 0.0362
09:01-10:00, Sat., 23 May. 0.0380 0.0343 0.0361
08:01-09:00, Sat., 23 May. 0.0388 0.0341 0.0361
07:01-08:00, Sat., 23 May. 0.0383 0.0340 0.0362
06:01-07:00, Sat., 23 May. 0.0384 0.0350 0.0364
05:01-06:00, Sat., 23 May. 0.0383 0.0343 0.0362
04:01-05:00, Sat., 23 May. 0.0391 0.0326 0.0361
03:01-04:00, Sat., 23 May. 0.0384 0.0333 0.0361
02:01-03:00, Sat., 23 May. 0.0381 0.0339 0.0360
01:01-02:00, Sat., 23 May. 0.0395 0.0341 0.0362
00:01-01:00, Sat., 23 May. 0.0387 0.0341 0.0361
23:01-24:00, Fri., 22 May. 0.0384 0.0338 0.0362
22:01-23:00, Fri., 22 May. 0.0381 0.0338 0.0361
21:01-22:00, Fri., 22 May. 0.0389 0.0331 0.0359
20:01-21:00, Fri., 22 May. 0.0378 0.0330 0.0359
19:01-20:00, Fri., 22 May. 0.0385 0.0341 0.0361
18:01-19:00, Fri., 22 May. 0.0376 0.0336 0.0358
17:01-18:00, Fri., 22 May. 0.0382 0.0339 0.0361
16:01-17:00, Fri., 22 May. 0.0391 0.0340 0.0366
15:01-16:00, Fri., 22 May. 0.0382 0.0347 0.0367