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
11:01-12:00, Sun., 12 Jul. 0.0397 0.0350 0.0369
10:01-11:00, Sun., 12 Jul. 0.0385 0.0347 0.0367
09:01-10:00, Sun., 12 Jul. 0.0384 0.0346 0.0367
08:01-09:00, Sun., 12 Jul. 0.0391 0.0341 0.0366
07:01-08:00, Sun., 12 Jul. 0.0396 0.0347 0.0368
06:01-07:00, Sun., 12 Jul. 0.0395 0.0338 0.0366
05:01-06:00, Sun., 12 Jul. 0.0381 0.0347 0.0364
04:01-05:00, Sun., 12 Jul. 0.0394 0.0339 0.0364
03:01-04:00, Sun., 12 Jul. 0.0389 0.0333 0.0363
02:01-03:00, Sun., 12 Jul. 0.0387 0.0343 0.0364
01:01-02:00, Sun., 12 Jul. 0.0382 0.0345 0.0364
00:01-01:00, Sun., 12 Jul. 0.0390 0.0340 0.0367
22:01-23:00, Sat., 11 Jul. 0.0386 0.0341 0.0364
21:01-22:00, Sat., 11 Jul. 0.0395 0.0348 0.0366
20:01-21:00, Sat., 11 Jul. 0.0388 0.0345 0.0368
19:01-20:00, Sat., 11 Jul. 0.0381 0.0348 0.0366
18:01-19:00, Sat., 11 Jul. 0.0384 0.0347 0.0366
17:01-18:00, Sat., 11 Jul. 0.0393 0.0348 0.0368
16:01-17:00, Sat., 11 Jul. 0.0394 0.0351 0.0367
15:01-16:00, Sat., 11 Jul. 0.0389 0.0340 0.0367
14:01-15:00, Sat., 11 Jul. 0.0383 0.0346 0.0366
13:01-14:00, Sat., 11 Jul. 0.0391 0.0347 0.0368
12:01-13:00, Sat., 11 Jul. 0.0397 0.0343 0.0367
11:01-12:00, Sat., 11 Jul. 0.0389 0.0340 0.0365
10:01-11:00, Sat., 11 Jul. 0.0391 0.0346 0.0366
09:01-10:00, Sat., 11 Jul. 0.0384 0.0336 0.0364
08:01-09:00, Sat., 11 Jul. 0.0389 0.0335 0.0365
07:01-08:00, Sat., 11 Jul. 0.0384 0.0337 0.0362
06:01-07:00, Sat., 11 Jul. 0.0384 0.0343 0.0364
05:01-06:00, Sat., 11 Jul. 0.0380 0.0337 0.0362
04:01-05:00, Sat., 11 Jul. 0.0390 0.0336 0.0362
03:01-04:00, Sat., 11 Jul. 0.0378 0.0345 0.0362
02:01-03:00, Sat., 11 Jul. 0.0395 0.0347 0.0363
01:01-02:00, Sat., 11 Jul. 0.0381 0.0346 0.0362
00:01-01:00, Sat., 11 Jul. 0.0386 0.0337 0.0361
22:01-23:00, Fri., 10 Jul. 0.0378 0.0331 0.0360
21:01-22:00, Fri., 10 Jul. 0.0383 0.0340 0.0361
20:01-21:00, Fri., 10 Jul. 0.0377 0.0331 0.0360
19:01-20:00, Fri., 10 Jul. 0.0389 0.0336 0.0364
18:01-19:00, Fri., 10 Jul. 0.0380 0.0336 0.0363
17:01-18:00, Fri., 10 Jul. 0.0392 0.0336 0.0365
16:01-17:00, Fri., 10 Jul. 0.0394 0.0345 0.0367
15:01-16:00, Fri., 10 Jul. 0.0393 0.0347 0.0367
14:01-15:00, Fri., 10 Jul. 0.0392 0.0348 0.0367
13:01-14:00, Fri., 10 Jul. 0.0386 0.0337 0.0364
12:01-13:00, Fri., 10 Jul. 0.0397 0.0351 0.0366
11:01-12:00, Fri., 10 Jul. 0.0384 0.0348 0.0365
10:01-11:00, Fri., 10 Jul. 0.0388 0.0335 0.0362
09:01-10:00, Fri., 10 Jul. 0.0381 0.0343 0.0364
08:01-09:00, Fri., 10 Jul. 0.0381 0.0343 0.0362
07:01-08:00, Fri., 10 Jul. 0.0384 0.0332 0.0361
06:01-07:00, Fri., 10 Jul. 0.0383 0.0344 0.0362
05:01-06:00, Fri., 10 Jul. 0.0378 0.0340 0.0362
04:01-05:00, Fri., 10 Jul. 0.0388 0.0337 0.0362
03:01-04:00, Fri., 10 Jul. 0.0386 0.0338 0.0361
02:01-03:00, Fri., 10 Jul. 0.0380 0.0340 0.0362
01:01-02:00, Fri., 10 Jul. 0.0388 0.0343 0.0363
00:01-01:00, Fri., 10 Jul. 0.0394 0.0337 0.0360
22:01-23:00, Thu., 09 Jul. 0.0394 0.0338 0.0361
21:01-22:00, Thu., 09 Jul. 0.0387 0.0341 0.0362
20:01-21:00, Thu., 09 Jul. 0.0379 0.0343 0.0363
19:01-20:00, Thu., 09 Jul. 0.0381 0.0338 0.0363
18:01-19:00, Thu., 09 Jul. 0.0377 0.0344 0.0361
17:01-18:00, Thu., 09 Jul. 0.0387 0.0340 0.0362
16:01-17:00, Thu., 09 Jul. 0.0395 0.0350 0.0365
15:01-16:00, Thu., 09 Jul. 0.0381 0.0345 0.0364
14:01-15:00, Thu., 09 Jul. 0.0385 0.0347 0.0364
13:01-14:00, Thu., 09 Jul. 0.0377 0.0346 0.0362
12:01-13:00, Thu., 09 Jul. 0.0379 0.0337 0.0362
11:01-12:00, Thu., 09 Jul. 0.0389 0.0342 0.0363
10:01-11:00, Thu., 09 Jul. 0.0384 0.0343 0.0362
09:01-10:00, Thu., 09 Jul. 0.0395 0.0340 0.0361
08:01-09:00, Thu., 09 Jul. 0.0387 0.0344 0.0363
07:01-08:00, Thu., 09 Jul. 0.0380 0.0336 0.0364
06:01-07:00, Thu., 09 Jul. 0.0386 0.0336 0.0362
05:01-06:00, Thu., 09 Jul. 0.0384 0.0343 0.0362
04:01-05:00, Thu., 09 Jul. 0.0378 0.0342 0.0361
03:01-04:00, Thu., 09 Jul. 0.0380 0.0343 0.0361
02:01-03:00, Thu., 09 Jul. 0.0393 0.0338 0.0361
01:01-02:00, Thu., 09 Jul. 0.0385 0.0341 0.0361
00:01-01:00, Thu., 09 Jul. 0.0382 0.0335 0.0360
22:01-23:00, Wed., 08 Jul. 0.0380 0.0338 0.0362
21:01-22:00, Wed., 08 Jul. 0.0389 0.0335 0.0361
20:01-21:00, Wed., 08 Jul. 0.0388 0.0343 0.0364
19:01-20:00, Wed., 08 Jul. 0.0380 0.0339 0.0360
18:01-19:00, Wed., 08 Jul. 0.0381 0.0343 0.0362
17:01-18:00, Wed., 08 Jul. 0.0389 0.0343 0.0363
16:01-17:00, Wed., 08 Jul. 0.0383 0.0340 0.0363
15:01-16:00, Wed., 08 Jul. 0.0393 0.0342 0.0363
14:01-15:00, Wed., 08 Jul. 0.0384 0.0346 0.0366
13:01-14:00, Wed., 08 Jul. 0.0385 0.0343 0.0365
12:01-13:00, Wed., 08 Jul. 0.0388 0.0338 0.0363
11:01-12:00, Wed., 08 Jul. 0.0378 0.0335 0.0360
10:01-11:00, Wed., 08 Jul. 0.0384 0.0343 0.0361
09:01-10:00, Wed., 08 Jul. 0.0384 0.0334 0.0361
08:01-09:00, Wed., 08 Jul. 0.0381 0.0344 0.0360
07:01-08:00, Wed., 08 Jul. 0.0378 0.0341 0.0360
06:01-07:00, Wed., 08 Jul. 0.0378 0.0338 0.0361
05:01-06:00, Wed., 08 Jul. 0.0375 0.0329 0.0360
04:01-05:00, Wed., 08 Jul. 0.0381 0.0346 0.0361
03:01-04:00, Wed., 08 Jul. 0.0382 0.0330 0.0360
02:01-03:00, Wed., 08 Jul. 0.0386 0.0340 0.0360
01:01-02:00, Wed., 08 Jul. 0.0379 0.0336 0.0360
00:01-01:00, Wed., 08 Jul. 0.0377 0.0334 0.0360
22:01-23:00, Tue., 07 Jul. 0.0377 0.0340 0.0360
21:01-22:00, Tue., 07 Jul. 0.0384 0.0333 0.0360
20:01-21:00, Tue., 07 Jul. 0.0375 0.0340 0.0358
19:01-20:00, Tue., 07 Jul. 0.0376 0.0334 0.0361
18:01-19:00, Tue., 07 Jul. 0.0380 0.0338 0.0359
17:01-18:00, Tue., 07 Jul. 0.0386 0.0343 0.0362
16:01-17:00, Tue., 07 Jul. 0.0381 0.0339 0.0360
15:01-16:00, Tue., 07 Jul. 0.0388 0.0330 0.0360
14:01-15:00, Tue., 07 Jul. 0.0378 0.0342 0.0360
13:01-14:00, Tue., 07 Jul. 0.0384 0.0343 0.0363
12:01-13:00, Tue., 07 Jul. 0.0381 0.0335 0.0364
11:01-12:00, Tue., 07 Jul. 0.0385 0.0340 0.0366
10:01-11:00, Tue., 07 Jul. 0.0392 0.0342 0.0370
09:01-10:00, Tue., 07 Jul. 0.0388 0.0339 0.0360
08:01-09:00, Tue., 07 Jul. 0.0380 0.0340 0.0359
07:01-08:00, Tue., 07 Jul. 0.0383 0.0343 0.0363
06:01-07:00, Tue., 07 Jul. 0.0388 0.0339 0.0362
05:01-06:00, Tue., 07 Jul. 0.0388 0.0336 0.0359
04:01-05:00, Tue., 07 Jul. 0.0381 0.0334 0.0360
03:01-04:00, Tue., 07 Jul. 0.0396 0.0347 0.0361
02:01-03:00, Tue., 07 Jul. 0.0377 0.0343 0.0361
01:01-02:00, Tue., 07 Jul. 0.0379 0.0343 0.0360
00:01-01:00, Tue., 07 Jul. 0.0381 0.0331 0.0360
22:01-23:00, Mon., 06 Jul. 0.0396 0.0347 0.0364
21:01-22:00, Mon., 06 Jul. 0.0388 0.0343 0.0366
20:01-21:00, Mon., 06 Jul. 0.0405 0.0355 0.0377
19:01-20:00, Mon., 06 Jul. 0.0423 0.0360 0.0392
18:01-19:00, Mon., 06 Jul. 0.0419 0.0375 0.0397
17:01-18:00, Mon., 06 Jul. 0.0398 0.0353 0.0371
16:01-17:00, Mon., 06 Jul. 0.0391 0.0345 0.0361
15:01-16:00, Mon., 06 Jul. 0.0389 0.0336 0.0362
14:01-15:00, Mon., 06 Jul. 0.0377 0.0335 0.0361
13:01-14:00, Mon., 06 Jul. 0.0383 0.0336 0.0364
12:01-13:00, Mon., 06 Jul. 0.0381 0.0337 0.0361
11:01-12:00, Mon., 06 Jul. 0.0378 0.0335 0.0359
10:01-11:00, Mon., 06 Jul. 0.0380 0.0344 0.0362
09:01-10:00, Mon., 06 Jul. 0.0383 0.0340 0.0363
08:01-09:00, Mon., 06 Jul. 0.0383 0.0346 0.0366
07:01-08:00, Mon., 06 Jul. 0.0389 0.0346 0.0363
06:01-07:00, Mon., 06 Jul. 0.0389 0.0345 0.0362
05:01-06:00, Mon., 06 Jul. 0.0391 0.0345 0.0368
04:01-05:00, Mon., 06 Jul. 0.0402 0.0354 0.0377
03:01-04:00, Mon., 06 Jul. 0.0397 0.0347 0.0371
02:01-03:00, Mon., 06 Jul. 0.0391 0.0346 0.0366
01:01-02:00, Mon., 06 Jul. 0.0398 0.0348 0.0375
00:01-01:00, Mon., 06 Jul. 0.0402 0.0354 0.0376
22:01-23:00, Sun., 05 Jul. 0.0378 0.0343 0.0362
21:01-22:00, Sun., 05 Jul. 0.0390 0.0343 0.0362
20:01-21:00, Sun., 05 Jul. 0.0381 0.0340 0.0359
19:01-20:00, Sun., 05 Jul. 0.0381 0.0345 0.0363
18:01-19:00, Sun., 05 Jul. 0.0382 0.0340 0.0364
17:01-18:00, Sun., 05 Jul. 0.0387 0.0343 0.0363
16:01-17:00, Sun., 05 Jul. 0.0401 0.0347 0.0366
15:01-16:00, Sun., 05 Jul. 0.0395 0.0342 0.0366
14:01-15:00, Sun., 05 Jul. 0.0381 0.0340 0.0363
13:01-14:00, Sun., 05 Jul. 0.0388 0.0344 0.0363
12:01-13:00, Sun., 05 Jul. 0.0378 0.0343 0.0362
11:01-12:00, Sun., 05 Jul. 0.0383 0.0342 0.0361
10:01-11:00, Sun., 05 Jul. 0.0397 0.0343 0.0362
09:01-10:00, Sun., 05 Jul. 0.0377 0.0343 0.0362
08:01-09:00, Sun., 05 Jul. 0.0379 0.0341 0.0363
07:01-08:00, Sun., 05 Jul. 0.0391 0.0349 0.0370
06:01-07:00, Sun., 05 Jul. 0.0385 0.0339 0.0363
05:01-06:00, Sun., 05 Jul. 0.0384 0.0336 0.0362
04:01-05:00, Sun., 05 Jul. 0.0387 0.0333 0.0362
03:01-04:00, Sun., 05 Jul. 0.0389 0.0339 0.0365
02:01-03:00, Sun., 05 Jul. 0.0383 0.0350 0.0365
01:01-02:00, Sun., 05 Jul. 0.0386 0.0347 0.0363
00:01-01:00, Sun., 05 Jul. 0.0377 0.0343 0.0363
22:01-23:00, Sat., 04 Jul. 0.0381 0.0330 0.0359
21:01-22:00, Sat., 04 Jul. 0.0377 0.0340 0.0359
20:01-21:00, Sat., 04 Jul. 0.0381 0.0338 0.0360
19:01-20:00, Sat., 04 Jul. 0.0387 0.0343 0.0363
18:01-19:00, Sat., 04 Jul. 0.0383 0.0346 0.0362
17:01-18:00, Sat., 04 Jul. 0.0384 0.0336 0.0362
16:01-17:00, Sat., 04 Jul. 0.0393 0.0334 0.0364
15:01-16:00, Sat., 04 Jul. 0.0383 0.0338 0.0363
14:01-15:00, Sat., 04 Jul. 0.0391 0.0341 0.0362
13:01-14:00, Sat., 04 Jul. 0.0387 0.0336 0.0363
12:01-13:00, Sat., 04 Jul. 0.0386 0.0336 0.0360
11:01-12:00, Sat., 04 Jul. 0.0406 0.0329 0.0361
10:01-11:00, Sat., 04 Jul. 0.0382 0.0343 0.0361
09:01-10:00, Sat., 04 Jul. 0.0389 0.0339 0.0363
08:01-09:00, Sat., 04 Jul. 0.0384 0.0343 0.0360
07:01-08:00, Sat., 04 Jul. 0.0381 0.0343 0.0361
06:01-07:00, Sat., 04 Jul. 0.0381 0.0341 0.0359
05:01-06:00, Sat., 04 Jul. 0.0384 0.0340 0.0358
04:01-05:00, Sat., 04 Jul. 0.0384 0.0336 0.0358
03:01-04:00, Sat., 04 Jul. 0.0381 0.0337 0.0360
02:01-03:00, Sat., 04 Jul. 0.0390 0.0337 0.0358
01:01-02:00, Sat., 04 Jul. 0.0383 0.0343 0.0360
00:01-01:00, Sat., 04 Jul. 0.0387 0.0344 0.0360
22:01-23:00, Fri., 03 Jul. 0.0384 0.0336 0.0359
21:01-22:00, Fri., 03 Jul. 0.0375 0.0331 0.0358
20:01-21:00, Fri., 03 Jul. 0.0374 0.0340 0.0359
19:01-20:00, Fri., 03 Jul. 0.0382 0.0341 0.0360
18:01-19:00, Fri., 03 Jul. 0.0385 0.0338 0.0362
17:01-18:00, Fri., 03 Jul. 0.0391 0.0333 0.0362
16:01-17:00, Fri., 03 Jul. 0.0383 0.0346 0.0362
15:01-16:00, Fri., 03 Jul. 0.0377 0.0337 0.0364
14:01-15:00, Fri., 03 Jul. 0.0384 0.0343 0.0362
13:01-14:00, Fri., 03 Jul. 0.0390 0.0343 0.0361
12:01-13:00, Fri., 03 Jul. 0.0383 0.0340 0.0363
11:01-12:00, Fri., 03 Jul. 0.0385 0.0344 0.0363
10:01-11:00, Fri., 03 Jul. 0.0382 0.0337 0.0358
09:01-10:00, Fri., 03 Jul. 0.0382 0.0333 0.0358
08:01-09:00, Fri., 03 Jul. 0.0382 0.0333 0.0357
07:01-08:00, Fri., 03 Jul. 0.0379 0.0344 0.0361
06:01-07:00, Fri., 03 Jul. 0.0390 0.0344 0.0367
05:01-06:00, Fri., 03 Jul. 0.0402 0.0355 0.0377
04:01-05:00, Fri., 03 Jul. 0.0422 0.0375 0.0397
03:01-04:00, Fri., 03 Jul. 0.0430 0.0379 0.0406
02:01-03:00, Fri., 03 Jul. 0.0409 0.0322 0.0369
01:01-02:00, Fri., 03 Jul. 0.0380 0.0339 0.0358
00:01-01:00, Fri., 03 Jul. 0.0383 0.0339 0.0359
22:01-23:00, Thu., 02 Jul. 0.0380 0.0331 0.0359
21:01-22:00, Thu., 02 Jul. 0.0377 0.0341 0.0359
20:01-21:00, Thu., 02 Jul. 0.0384 0.0340 0.0359
19:01-20:00, Thu., 02 Jul. 0.0378 0.0341 0.0359
18:01-19:00, Thu., 02 Jul. 0.0381 0.0342 0.0361
17:01-18:00, Thu., 02 Jul. 0.0378 0.0340 0.0362
16:01-17:00, Thu., 02 Jul. 0.0388 0.0335 0.0359
15:01-16:00, Thu., 02 Jul. 0.0392 0.0340 0.0362
14:01-15:00, Thu., 02 Jul. 0.0384 0.0343 0.0358
13:01-14:00, Thu., 02 Jul. 0.0378 0.0339 0.0360
12:01-13:00, Thu., 02 Jul. 0.0383 0.0347 0.0366
11:01-12:00, Thu., 02 Jul. 0.0401 0.0359 0.0378
10:01-11:00, Thu., 02 Jul. 0.0417 0.0365 0.0388
09:01-10:00, Thu., 02 Jul. 0.0432 0.0378 0.0405
08:01-09:00, Thu., 02 Jul. 0.0433 0.0392 0.0414
07:01-08:00, Thu., 02 Jul. 0.0455 0.0405 0.0424
06:01-07:00, Thu., 02 Jul. 0.0447 0.0394 0.0419
05:01-06:00, Thu., 02 Jul. 0.0451 0.0404 0.0426
04:01-05:00, Thu., 02 Jul. 0.0457 0.0405 0.0427
03:01-04:00, Thu., 02 Jul. 0.0460 0.0392 0.0423
02:01-03:00, Thu., 02 Jul. 0.0429 0.0373 0.0401