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
07:01-08:00, Tue., 12 May. 0.0391 0.0340 0.0370
06:01-07:00, Tue., 12 May. 0.0391 0.0350 0.0368
05:01-06:00, Tue., 12 May. 0.0386 0.0351 0.0370
04:01-05:00, Tue., 12 May. 0.0391 0.0349 0.0370
03:01-04:00, Tue., 12 May. 0.0393 0.0347 0.0369
02:01-03:00, Tue., 12 May. 0.0384 0.0346 0.0368
01:01-02:00, Tue., 12 May. 0.0383 0.0346 0.0367
00:01-01:00, Tue., 12 May. 0.0389 0.0350 0.0369
22:01-23:00, Mon., 11 May. 0.0386 0.0348 0.0366
21:01-22:00, Mon., 11 May. 0.0395 0.0343 0.0367
20:01-21:00, Mon., 11 May. 0.0393 0.0348 0.0369
19:01-20:00, Mon., 11 May. 0.0391 0.0349 0.0367
18:01-19:00, Mon., 11 May. 0.0390 0.0334 0.0367
17:01-18:00, Mon., 11 May. 0.0402 0.0349 0.0370
16:01-17:00, Mon., 11 May. 0.0393 0.0342 0.0368
15:01-16:00, Mon., 11 May. 0.0395 0.0339 0.0368
14:01-15:00, Mon., 11 May. 0.0397 0.0340 0.0369
13:01-14:00, Mon., 11 May. 0.0388 0.0346 0.0368
12:01-13:00, Mon., 11 May. 0.0399 0.0343 0.0369
11:01-12:00, Mon., 11 May. 0.0385 0.0347 0.0367
10:01-11:00, Mon., 11 May. 0.0387 0.0343 0.0369
09:01-10:00, Mon., 11 May. 0.0394 0.0350 0.0369
08:01-09:00, Mon., 11 May. 0.0389 0.0345 0.0368
07:01-08:00, Mon., 11 May. 0.0391 0.0346 0.0371
06:01-07:00, Mon., 11 May. 0.0391 0.0347 0.0369
05:01-06:00, Mon., 11 May. 0.0398 0.0349 0.0367
04:01-05:00, Mon., 11 May. 0.0388 0.0343 0.0370
03:01-04:00, Mon., 11 May. 0.0384 0.0342 0.0366
02:01-03:00, Mon., 11 May. 0.0394 0.0355 0.0371
01:01-02:00, Mon., 11 May. 0.0388 0.0351 0.0367
00:01-01:00, Mon., 11 May. 0.0391 0.0348 0.0367
22:01-23:00, Sun., 10 May. 0.0393 0.0340 0.0366
21:01-22:00, Sun., 10 May. 0.0393 0.0344 0.0368
20:01-21:00, Sun., 10 May. 0.0393 0.0347 0.0369
19:01-20:00, Sun., 10 May. 0.0390 0.0350 0.0369
18:01-19:00, Sun., 10 May. 0.0387 0.0340 0.0367
17:01-18:00, Sun., 10 May. 0.0389 0.0350 0.0370
16:01-17:00, Sun., 10 May. 0.0393 0.0348 0.0370
15:01-16:00, Sun., 10 May. 0.0393 0.0350 0.0372
14:01-15:00, Sun., 10 May. 0.0386 0.0349 0.0370
13:01-14:00, Sun., 10 May. 0.0393 0.0353 0.0371
12:01-13:00, Sun., 10 May. 0.0395 0.0348 0.0372
11:01-12:00, Sun., 10 May. 0.0393 0.0348 0.0370
10:01-11:00, Sun., 10 May. 0.0389 0.0351 0.0371
09:01-10:00, Sun., 10 May. 0.0390 0.0353 0.0369
08:01-09:00, Sun., 10 May. 0.0388 0.0347 0.0370
07:01-08:00, Sun., 10 May. 0.0387 0.0353 0.0371
06:01-07:00, Sun., 10 May. 0.0395 0.0355 0.0370
05:01-06:00, Sun., 10 May. 0.0391 0.0357 0.0370
04:01-05:00, Sun., 10 May. 0.0388 0.0342 0.0367
03:01-04:00, Sun., 10 May. 0.0391 0.0343 0.0370
02:01-03:00, Sun., 10 May. 0.0390 0.0353 0.0369
01:01-02:00, Sun., 10 May. 0.0401 0.0346 0.0371
00:01-01:00, Sun., 10 May. 0.0387 0.0348 0.0368
22:01-23:00, Sat., 09 May. 0.0384 0.0344 0.0366
21:01-22:00, Sat., 09 May. 0.0394 0.0343 0.0366
20:01-21:00, Sat., 09 May. 0.0391 0.0344 0.0367
19:01-20:00, Sat., 09 May. 0.0388 0.0350 0.0367
18:01-19:00, Sat., 09 May. 0.0391 0.0343 0.0369
17:01-18:00, Sat., 09 May. 0.0398 0.0352 0.0371
16:01-17:00, Sat., 09 May. 0.0385 0.0334 0.0370
15:01-16:00, Sat., 09 May. 0.0395 0.0349 0.0372
14:01-15:00, Sat., 09 May. 0.0388 0.0352 0.0368
13:01-14:00, Sat., 09 May. 0.0391 0.0343 0.0370
12:01-13:00, Sat., 09 May. 0.0389 0.0342 0.0368
11:01-12:00, Sat., 09 May. 0.0390 0.0337 0.0367
10:01-11:00, Sat., 09 May. 0.0389 0.0333 0.0366
09:01-10:00, Sat., 09 May. 0.0391 0.0347 0.0368
08:01-09:00, Sat., 09 May. 0.0395 0.0347 0.0368
07:01-08:00, Sat., 09 May. 0.0381 0.0348 0.0367
06:01-07:00, Sat., 09 May. 0.0397 0.0350 0.0368
05:01-06:00, Sat., 09 May. 0.0400 0.0350 0.0369
04:01-05:00, Sat., 09 May. 0.0386 0.0347 0.0369
03:01-04:00, Sat., 09 May. 0.0387 0.0348 0.0368
02:01-03:00, Sat., 09 May. 0.0394 0.0350 0.0367
01:01-02:00, Sat., 09 May. 0.0390 0.0345 0.0368
00:01-01:00, Sat., 09 May. 0.0396 0.0347 0.0367
22:01-23:00, Fri., 08 May. 0.0391 0.0344 0.0368
21:01-22:00, Fri., 08 May. 0.0388 0.0344 0.0368
20:01-21:00, Fri., 08 May. 0.0387 0.0349 0.0367
19:01-20:00, Fri., 08 May. 0.0382 0.0351 0.0367
18:01-19:00, Fri., 08 May. 0.0384 0.0343 0.0367
17:01-18:00, Fri., 08 May. 0.0388 0.0350 0.0367
16:01-17:00, Fri., 08 May. 0.0385 0.0348 0.0366
15:01-16:00, Fri., 08 May. 0.0393 0.0347 0.0365
14:01-15:00, Fri., 08 May. 0.0388 0.0348 0.0365
13:01-14:00, Fri., 08 May. 0.0388 0.0347 0.0366
12:01-13:00, Fri., 08 May. 0.0385 0.0343 0.0370
11:01-12:00, Fri., 08 May. 0.0395 0.0345 0.0367
10:01-11:00, Fri., 08 May. 0.0389 0.0342 0.0366
09:01-10:00, Fri., 08 May. 0.0385 0.0343 0.0365
08:01-09:00, Fri., 08 May. 0.0383 0.0349 0.0366
07:01-08:00, Fri., 08 May. 0.0391 0.0345 0.0365
06:01-07:00, Fri., 08 May. 0.0388 0.0353 0.0368
05:01-06:00, Fri., 08 May. 0.0384 0.0340 0.0365
04:01-05:00, Fri., 08 May. 0.0391 0.0336 0.0367
03:01-04:00, Fri., 08 May. 0.0394 0.0348 0.0366
02:01-03:00, Fri., 08 May. 0.0387 0.0346 0.0366
01:01-02:00, Fri., 08 May. 0.0395 0.0343 0.0366
00:01-01:00, Fri., 08 May. 0.0395 0.0347 0.0367
22:01-23:00, Thu., 07 May. 0.0382 0.0343 0.0366
21:01-22:00, Thu., 07 May. 0.0385 0.0343 0.0362
20:01-21:00, Thu., 07 May. 0.0381 0.0340 0.0362
19:01-20:00, Thu., 07 May. 0.0380 0.0348 0.0365
18:01-19:00, Thu., 07 May. 0.0387 0.0350 0.0365
17:01-18:00, Thu., 07 May. 0.0395 0.0342 0.0363
16:01-17:00, Thu., 07 May. 0.0391 0.0345 0.0367
15:01-16:00, Thu., 07 May. 0.0388 0.0341 0.0367
14:01-15:00, Thu., 07 May. 0.0387 0.0350 0.0367
13:01-14:00, Thu., 07 May. 0.0388 0.0335 0.0364
12:01-13:00, Thu., 07 May. 0.0391 0.0347 0.0365
11:01-12:00, Thu., 07 May. 0.0387 0.0347 0.0364
10:01-11:00, Thu., 07 May. 0.0398 0.0350 0.0367
09:01-10:00, Thu., 07 May. 0.0390 0.0343 0.0365
08:01-09:00, Thu., 07 May. 0.0389 0.0341 0.0366
07:01-08:00, Thu., 07 May. 0.0390 0.0347 0.0369
06:01-07:00, Thu., 07 May. 0.0383 0.0343 0.0365
05:01-06:00, Thu., 07 May. 0.0383 0.0347 0.0363
04:01-05:00, Thu., 07 May. 0.0381 0.0344 0.0367
03:01-04:00, Thu., 07 May. 0.0395 0.0350 0.0371
02:01-03:00, Thu., 07 May. 0.0391 0.0355 0.0374
01:01-02:00, Thu., 07 May. 0.0386 0.0346 0.0365
00:01-01:00, Thu., 07 May. 0.0395 0.0350 0.0365
22:01-23:00, Wed., 06 May. 0.0396 0.0336 0.0368
21:01-22:00, Wed., 06 May. 0.0395 0.0351 0.0369
20:01-21:00, Wed., 06 May. 0.0393 0.0355 0.0377
19:01-20:00, Wed., 06 May. 0.0385 0.0359 0.0372
18:01-19:00, Wed., 06 May. 0.0396 0.0343 0.0367
17:01-18:00, Wed., 06 May. 0.0389 0.0344 0.0366
16:01-17:00, Wed., 06 May. 0.0395 0.0346 0.0368
15:01-16:00, Wed., 06 May. 0.0381 0.0350 0.0366
14:01-15:00, Wed., 06 May. 0.0382 0.0344 0.0366
13:01-14:00, Wed., 06 May. 0.0387 0.0350 0.0366
12:01-13:00, Wed., 06 May. 0.0391 0.0342 0.0364
11:01-12:00, Wed., 06 May. 0.0384 0.0341 0.0365
10:01-11:00, Wed., 06 May. 0.0391 0.0338 0.0368
09:01-10:00, Wed., 06 May. 0.0392 0.0348 0.0367
08:01-09:00, Wed., 06 May. 0.0381 0.0347 0.0366
07:01-08:00, Wed., 06 May. 0.0382 0.0343 0.0363
06:01-07:00, Wed., 06 May. 0.0388 0.0349 0.0366
05:01-06:00, Wed., 06 May. 0.0401 0.0348 0.0366
04:01-05:00, Wed., 06 May. 0.0381 0.0345 0.0367
03:01-04:00, Wed., 06 May. 0.0393 0.0347 0.0366
02:01-03:00, Wed., 06 May. 0.0383 0.0347 0.0365
01:01-02:00, Wed., 06 May. 0.0395 0.0337 0.0365
00:01-01:00, Wed., 06 May. 0.0391 0.0340 0.0366
22:01-23:00, Tue., 05 May. 0.0386 0.0345 0.0365
21:01-22:00, Tue., 05 May. 0.0384 0.0346 0.0366
20:01-21:00, Tue., 05 May. 0.0394 0.0343 0.0366
19:01-20:00, Tue., 05 May. 0.0387 0.0349 0.0366
18:01-19:00, Tue., 05 May. 0.0385 0.0349 0.0364
17:01-18:00, Tue., 05 May. 0.0383 0.0344 0.0365
16:01-17:00, Tue., 05 May. 0.0385 0.0343 0.0367
15:01-16:00, Tue., 05 May. 0.0392 0.0340 0.0365
14:01-15:00, Tue., 05 May. 0.0388 0.0344 0.0366
13:01-14:00, Tue., 05 May. 0.0395 0.0338 0.0368
12:01-13:00, Tue., 05 May. 0.0394 0.0350 0.0369
11:01-12:00, Tue., 05 May. 0.0390 0.0349 0.0365
10:01-11:00, Tue., 05 May. 0.0387 0.0347 0.0366
09:01-10:00, Tue., 05 May. 0.0378 0.0345 0.0365
08:01-09:00, Tue., 05 May. 0.0388 0.0341 0.0366
07:01-08:00, Tue., 05 May. 0.0383 0.0346 0.0366
06:01-07:00, Tue., 05 May. 0.0387 0.0348 0.0367
05:01-06:00, Tue., 05 May. 0.0390 0.0338 0.0365
04:01-05:00, Tue., 05 May. 0.0390 0.0342 0.0364
03:01-04:00, Tue., 05 May. 0.0404 0.0347 0.0366
02:01-03:00, Tue., 05 May. 0.0391 0.0342 0.0367
01:01-02:00, Tue., 05 May. 0.0387 0.0345 0.0366
00:01-01:00, Tue., 05 May. 0.0383 0.0347 0.0364
22:01-23:00, Mon., 04 May. 0.0387 0.0346 0.0364
21:01-22:00, Mon., 04 May. 0.0385 0.0339 0.0365
20:01-21:00, Mon., 04 May. 0.0382 0.0347 0.0365
19:01-20:00, Mon., 04 May. 0.0384 0.0348 0.0368
18:01-19:00, Mon., 04 May. 0.0387 0.0342 0.0365
17:01-18:00, Mon., 04 May. 0.0391 0.0347 0.0366
16:01-17:00, Mon., 04 May. 0.0399 0.0353 0.0367
15:01-16:00, Mon., 04 May. 0.0391 0.0353 0.0371
14:01-15:00, Mon., 04 May. 0.0397 0.0347 0.0372
13:01-14:00, Mon., 04 May. 0.0392 0.0347 0.0370
12:01-13:00, Mon., 04 May. 0.0388 0.0349 0.0370
11:01-12:00, Mon., 04 May. 0.0395 0.0352 0.0371
10:01-11:00, Mon., 04 May. 0.0386 0.0335 0.0369
09:01-10:00, Mon., 04 May. 0.0386 0.0346 0.0368
08:01-09:00, Mon., 04 May. 0.0387 0.0348 0.0367
07:01-08:00, Mon., 04 May. 0.0398 0.0350 0.0376
06:01-07:00, Mon., 04 May. 0.0453 0.0368 0.0409
05:01-06:00, Mon., 04 May. 0.0471 0.0383 0.0437
04:01-05:00, Mon., 04 May. 0.0402 0.0355 0.0379
03:01-04:00, Mon., 04 May. 0.0407 0.0357 0.0379
02:01-03:00, Mon., 04 May. 0.0397 0.0355 0.0372
01:01-02:00, Mon., 04 May. 0.0391 0.0353 0.0369
00:01-01:00, Mon., 04 May. 0.0384 0.0340 0.0364
22:01-23:00, Sun., 03 May. 0.0382 0.0337 0.0365
21:01-22:00, Sun., 03 May. 0.0386 0.0340 0.0363
20:01-21:00, Sun., 03 May. 0.0386 0.0343 0.0365
19:01-20:00, Sun., 03 May. 0.0385 0.0345 0.0366
18:01-19:00, Sun., 03 May. 0.0390 0.0338 0.0364
17:01-18:00, Sun., 03 May. 0.0388 0.0342 0.0366
16:01-17:00, Sun., 03 May. 0.0390 0.0344 0.0367
15:01-16:00, Sun., 03 May. 0.0391 0.0339 0.0365
14:01-15:00, Sun., 03 May. 0.0391 0.0344 0.0367
13:01-14:00, Sun., 03 May. 0.0386 0.0347 0.0367
12:01-13:00, Sun., 03 May. 0.0395 0.0348 0.0369
11:01-12:00, Sun., 03 May. 0.0396 0.0347 0.0368
10:01-11:00, Sun., 03 May. 0.0393 0.0345 0.0369
09:01-10:00, Sun., 03 May. 0.0397 0.0347 0.0370
08:01-09:00, Sun., 03 May. 0.0385 0.0350 0.0369
07:01-08:00, Sun., 03 May. 0.0387 0.0343 0.0367
06:01-07:00, Sun., 03 May. 0.0395 0.0343 0.0366
05:01-06:00, Sun., 03 May. 0.0387 0.0350 0.0367
04:01-05:00, Sun., 03 May. 0.0396 0.0349 0.0369
03:01-04:00, Sun., 03 May. 0.0396 0.0346 0.0368
02:01-03:00, Sun., 03 May. 0.0386 0.0347 0.0366
01:01-02:00, Sun., 03 May. 0.0394 0.0345 0.0366
00:01-01:00, Sun., 03 May. 0.0387 0.0342 0.0366
22:01-23:00, Sat., 02 May. 0.0384 0.0338 0.0365
21:01-22:00, Sat., 02 May. 0.0395 0.0340 0.0367
20:01-21:00, Sat., 02 May. 0.0381 0.0346 0.0366
19:01-20:00, Sat., 02 May. 0.0391 0.0345 0.0366
18:01-19:00, Sat., 02 May. 0.0387 0.0337 0.0366
17:01-18:00, Sat., 02 May. 0.0396 0.0347 0.0366
16:01-17:00, Sat., 02 May. 0.0393 0.0345 0.0368
15:01-16:00, Sat., 02 May. 0.0389 0.0349 0.0367
14:01-15:00, Sat., 02 May. 0.0393 0.0336 0.0368
13:01-14:00, Sat., 02 May. 0.0381 0.0342 0.0366
12:01-13:00, Sat., 02 May. 0.0384 0.0351 0.0367
11:01-12:00, Sat., 02 May. 0.0393 0.0340 0.0365
10:01-11:00, Sat., 02 May. 0.0388 0.0337 0.0364
09:01-10:00, Sat., 02 May. 0.0391 0.0340 0.0364
08:01-09:00, Sat., 02 May. 0.0388 0.0346 0.0363
07:01-08:00, Sat., 02 May. 0.0379 0.0340 0.0362
06:01-07:00, Sat., 02 May. 0.0391 0.0344 0.0366
05:01-06:00, Sat., 02 May. 0.0387 0.0343 0.0365
04:01-05:00, Sat., 02 May. 0.0383 0.0338 0.0365
03:01-04:00, Sat., 02 May. 0.0387 0.0343 0.0367
02:01-03:00, Sat., 02 May. 0.0384 0.0345 0.0365
01:01-02:00, Sat., 02 May. 0.0381 0.0347 0.0366
00:01-01:00, Sat., 02 May. 0.0383 0.0347 0.0363
22:01-23:00, Fri., 01 May. 0.0389 0.0329 0.0365
21:01-22:00, Fri., 01 May. 0.0384 0.0342 0.0363