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
21:01-22:00, Fri., 06 Mar. 0.0395 0.0341 0.0367
20:01-21:00, Fri., 06 Mar. 0.0391 0.0350 0.0369
19:01-20:00, Fri., 06 Mar. 0.0384 0.0344 0.0366
18:01-19:00, Fri., 06 Mar. 0.0388 0.0341 0.0363
17:01-18:00, Fri., 06 Mar. 0.0390 0.0346 0.0365
16:01-17:00, Fri., 06 Mar. 0.0387 0.0350 0.0365
15:01-16:00, Fri., 06 Mar. 0.0393 0.0347 0.0365
14:01-15:00, Fri., 06 Mar. 0.0384 0.0353 0.0366
13:01-14:00, Fri., 06 Mar. 0.0391 0.0346 0.0367
12:01-13:00, Fri., 06 Mar. 0.0387 0.0350 0.0368
11:01-12:00, Fri., 06 Mar. 0.0388 0.0337 0.0365
10:01-11:00, Fri., 06 Mar. 0.0391 0.0347 0.0367
09:01-10:00, Fri., 06 Mar. 0.0388 0.0353 0.0370
08:01-09:00, Fri., 06 Mar. 0.0394 0.0343 0.0368
07:01-08:00, Fri., 06 Mar. 0.0389 0.0349 0.0369
06:01-07:00, Fri., 06 Mar. 0.0388 0.0353 0.0368
05:01-06:00, Fri., 06 Mar. 0.0388 0.0344 0.0367
04:01-05:00, Fri., 06 Mar. 0.0393 0.0349 0.0366
03:01-04:00, Fri., 06 Mar. 0.0384 0.0344 0.0363
02:01-03:00, Fri., 06 Mar. 0.0382 0.0341 0.0365
01:01-02:00, Fri., 06 Mar. 0.0389 0.0343 0.0366
00:01-01:00, Fri., 06 Mar. 0.0379 0.0343 0.0364
23:01-24:00, Thu., 05 Mar. 0.0383 0.0338 0.0363
22:01-23:00, Thu., 05 Mar. 0.0383 0.0343 0.0368
21:01-22:00, Thu., 05 Mar. 0.0388 0.0345 0.0364
20:01-21:00, Thu., 05 Mar. 0.0387 0.0340 0.0364
19:01-20:00, Thu., 05 Mar. 0.0381 0.0343 0.0364
18:01-19:00, Thu., 05 Mar. 0.0389 0.0341 0.0367
17:01-18:00, Thu., 05 Mar. 0.0392 0.0348 0.0366
16:01-17:00, Thu., 05 Mar. 0.0383 0.0343 0.0363
15:01-16:00, Thu., 05 Mar. 0.0381 0.0340 0.0364
14:01-15:00, Thu., 05 Mar. 0.0387 0.0344 0.0365
13:01-14:00, Thu., 05 Mar. 0.0388 0.0347 0.0365
12:01-13:00, Thu., 05 Mar. 0.0395 0.0345 0.0365
11:01-12:00, Thu., 05 Mar. 0.0387 0.0345 0.0365
10:01-11:00, Thu., 05 Mar. 0.0387 0.0347 0.0369
09:01-10:00, Thu., 05 Mar. 0.0394 0.0346 0.0366
08:01-09:00, Thu., 05 Mar. 0.0391 0.0340 0.0367
07:01-08:00, Thu., 05 Mar. 0.0391 0.0344 0.0369
06:01-07:00, Thu., 05 Mar. 0.0388 0.0347 0.0368
05:01-06:00, Thu., 05 Mar. 0.0384 0.0343 0.0367
04:01-05:00, Thu., 05 Mar. 0.0388 0.0350 0.0367
03:01-04:00, Thu., 05 Mar. 0.0391 0.0338 0.0367
02:01-03:00, Thu., 05 Mar. 0.0400 0.0349 0.0367
01:01-02:00, Thu., 05 Mar. 0.0388 0.0341 0.0369
00:01-01:00, Thu., 05 Mar. 0.0396 0.0336 0.0367
23:01-24:00, Wed., 04 Mar. 0.0393 0.0347 0.0366
22:01-23:00, Wed., 04 Mar. 0.0389 0.0334 0.0365
21:01-22:00, Wed., 04 Mar. 0.0396 0.0347 0.0365
20:01-21:00, Wed., 04 Mar. 0.0391 0.0345 0.0366
19:01-20:00, Wed., 04 Mar. 0.0383 0.0344 0.0366
18:01-19:00, Wed., 04 Mar. 0.0380 0.0345 0.0364
17:01-18:00, Wed., 04 Mar. 0.0392 0.0336 0.0363
16:01-17:00, Wed., 04 Mar. 0.0380 0.0339 0.0362
15:01-16:00, Wed., 04 Mar. 0.0382 0.0342 0.0363
14:01-15:00, Wed., 04 Mar. 0.0382 0.0344 0.0365
13:01-14:00, Wed., 04 Mar. 0.0390 0.0345 0.0365
12:01-13:00, Wed., 04 Mar. 0.0391 0.0347 0.0366
11:01-12:00, Wed., 04 Mar. 0.0390 0.0348 0.0365
10:01-11:00, Wed., 04 Mar. 0.0389 0.0347 0.0370
09:01-10:00, Wed., 04 Mar. 0.0407 0.0351 0.0376
08:01-09:00, Wed., 04 Mar. 0.0406 0.0357 0.0383
07:01-08:00, Wed., 04 Mar. 0.0412 0.0358 0.0386
06:01-07:00, Wed., 04 Mar. 0.0426 0.0365 0.0400
05:01-06:00, Wed., 04 Mar. 0.0462 0.0398 0.0431
04:01-05:00, Wed., 04 Mar. 0.0481 0.0431 0.0458
03:01-04:00, Wed., 04 Mar. 0.0492 0.0437 0.0471
02:01-03:00, Wed., 04 Mar. 0.0501 0.0433 0.0465
01:01-02:00, Wed., 04 Mar. 0.0487 0.0441 0.0465
00:01-01:00, Wed., 04 Mar. 0.0485 0.0423 0.0457
23:01-24:00, Tue., 03 Mar. 0.0457 0.0388 0.0424
22:01-23:00, Tue., 03 Mar. 0.0497 0.0422 0.0471
21:01-22:00, Tue., 03 Mar. 0.0502 0.0408 0.0447
20:01-21:00, Tue., 03 Mar. 0.0473 0.0398 0.0438
19:01-20:00, Tue., 03 Mar. 0.0472 0.0419 0.0452
18:01-19:00, Tue., 03 Mar. 0.0458 0.0417 0.0441
17:01-18:00, Tue., 03 Mar. 0.0474 0.0420 0.0442
16:01-17:00, Tue., 03 Mar. 0.0457 0.0385 0.0412
15:01-16:00, Tue., 03 Mar. 0.0439 0.0392 0.0410
14:01-15:00, Tue., 03 Mar. 0.0436 0.0393 0.0414
13:01-14:00, Tue., 03 Mar. 0.0452 0.0387 0.0415
12:01-13:00, Tue., 03 Mar. 0.0440 0.0391 0.0416
11:01-12:00, Tue., 03 Mar. 0.0443 0.0404 0.0421
10:01-11:00, Tue., 03 Mar. 0.0442 0.0398 0.0419
09:01-10:00, Tue., 03 Mar. 0.0443 0.0391 0.0413
08:01-09:00, Tue., 03 Mar. 0.0422 0.0379 0.0400
07:01-08:00, Tue., 03 Mar. 0.0423 0.0380 0.0400
06:01-07:00, Tue., 03 Mar. 0.0410 0.0368 0.0387
05:01-06:00, Tue., 03 Mar. 0.0414 0.0356 0.0380
04:01-05:00, Tue., 03 Mar. 0.0395 0.0348 0.0371
03:01-04:00, Tue., 03 Mar. 0.0381 0.0349 0.0367
02:01-03:00, Tue., 03 Mar. 0.0387 0.0344 0.0366
01:01-02:00, Tue., 03 Mar. 0.0388 0.0347 0.0368
00:01-01:00, Tue., 03 Mar. 0.0390 0.0337 0.0367
23:01-24:00, Mon., 02 Mar. 0.0384 0.0351 0.0368
22:01-23:00, Mon., 02 Mar. 0.0395 0.0347 0.0369
21:01-22:00, Mon., 02 Mar. 0.0388 0.0347 0.0368
20:01-21:00, Mon., 02 Mar. 0.0384 0.0345 0.0366
19:01-20:00, Mon., 02 Mar. 0.0383 0.0347 0.0367
18:01-19:00, Mon., 02 Mar. 0.0390 0.0344 0.0365
17:01-18:00, Mon., 02 Mar. 0.0387 0.0343 0.0365
16:01-17:00, Mon., 02 Mar. 0.0397 0.0349 0.0369
15:01-16:00, Mon., 02 Mar. 0.0390 0.0341 0.0366
14:01-15:00, Mon., 02 Mar. 0.0388 0.0348 0.0368
13:01-14:00, Mon., 02 Mar. 0.0389 0.0348 0.0370
12:01-13:00, Mon., 02 Mar. 0.0384 0.0347 0.0367
11:01-12:00, Mon., 02 Mar. 0.0386 0.0349 0.0367
10:01-11:00, Mon., 02 Mar. 0.0391 0.0340 0.0370
09:01-10:00, Mon., 02 Mar. 0.0396 0.0352 0.0371
08:01-09:00, Mon., 02 Mar. 0.0394 0.0350 0.0371
07:01-08:00, Mon., 02 Mar. 0.0395 0.0347 0.0372
06:01-07:00, Mon., 02 Mar. 0.0395 0.0352 0.0372
05:01-06:00, Mon., 02 Mar. 0.0391 0.0348 0.0373
04:01-05:00, Mon., 02 Mar. 0.0398 0.0349 0.0372
03:01-04:00, Mon., 02 Mar. 0.0396 0.0353 0.0373
02:01-03:00, Mon., 02 Mar. 0.0397 0.0344 0.0368
01:01-02:00, Mon., 02 Mar. 0.0391 0.0347 0.0368
00:01-01:00, Mon., 02 Mar. 0.0390 0.0346 0.0368
23:01-24:00, Sun., 01 Mar. 0.0384 0.0349 0.0365
22:01-23:00, Sun., 01 Mar. 0.0396 0.0343 0.0366
21:01-22:00, Sun., 01 Mar. 0.0391 0.0342 0.0366
20:01-21:00, Sun., 01 Mar. 0.0388 0.0343 0.0367
19:01-20:00, Sun., 01 Mar. 0.0384 0.0350 0.0366
18:01-19:00, Sun., 01 Mar. 0.0387 0.0340 0.0367
17:01-18:00, Sun., 01 Mar. 0.0389 0.0348 0.0368
16:01-17:00, Sun., 01 Mar. 0.0398 0.0343 0.0369
15:01-16:00, Sun., 01 Mar. 0.0388 0.0344 0.0367
14:01-15:00, Sun., 01 Mar. 0.0396 0.0345 0.0368
13:01-14:00, Sun., 01 Mar. 0.0391 0.0347 0.0370
12:01-13:00, Sun., 01 Mar. 0.0388 0.0347 0.0368
11:01-12:00, Sun., 01 Mar. 0.0386 0.0342 0.0368
10:01-11:00, Sun., 01 Mar. 0.0397 0.0352 0.0369
09:01-10:00, Sun., 01 Mar. 0.0387 0.0354 0.0367
08:01-09:00, Sun., 01 Mar. 0.0387 0.0352 0.0367
07:01-08:00, Sun., 01 Mar. 0.0394 0.0349 0.0366
06:01-07:00, Sun., 01 Mar. 0.0391 0.0342 0.0368
05:01-06:00, Sun., 01 Mar. 0.0391 0.0343 0.0367
04:01-05:00, Sun., 01 Mar. 0.0402 0.0347 0.0369
03:01-04:00, Sun., 01 Mar. 0.0394 0.0347 0.0367
02:01-03:00, Sun., 01 Mar. 0.0388 0.0350 0.0368
01:01-02:00, Sun., 01 Mar. 0.0390 0.0343 0.0369
00:01-01:00, Sun., 01 Mar. 0.0386 0.0349 0.0368
23:01-24:00, Sat., 28 Feb. 0.0389 0.0347 0.0366
22:01-23:00, Sat., 28 Feb. 0.0391 0.0339 0.0368
21:01-22:00, Sat., 28 Feb. 0.0389 0.0347 0.0367
20:01-21:00, Sat., 28 Feb. 0.0396 0.0350 0.0370
19:01-20:00, Sat., 28 Feb. 0.0383 0.0348 0.0367
18:01-19:00, Sat., 28 Feb. 0.0389 0.0342 0.0367
17:01-18:00, Sat., 28 Feb. 0.0391 0.0343 0.0368
16:01-17:00, Sat., 28 Feb. 0.0394 0.0350 0.0368
15:01-16:00, Sat., 28 Feb. 0.0391 0.0339 0.0369
14:01-15:00, Sat., 28 Feb. 0.0392 0.0353 0.0369
13:01-14:00, Sat., 28 Feb. 0.0397 0.0354 0.0371
12:01-13:00, Sat., 28 Feb. 0.0387 0.0341 0.0368
11:01-12:00, Sat., 28 Feb. 0.0397 0.0344 0.0369
10:01-11:00, Sat., 28 Feb. 0.0391 0.0348 0.0367
09:01-10:00, Sat., 28 Feb. 0.0390 0.0348 0.0371
08:01-09:00, Sat., 28 Feb. 0.0388 0.0341 0.0366
07:01-08:00, Sat., 28 Feb. 0.0392 0.0353 0.0369
06:01-07:00, Sat., 28 Feb. 0.0399 0.0344 0.0368
05:01-06:00, Sat., 28 Feb. 0.0386 0.0343 0.0366
04:01-05:00, Sat., 28 Feb. 0.0389 0.0340 0.0365
03:01-04:00, Sat., 28 Feb. 0.0387 0.0350 0.0369
02:01-03:00, Sat., 28 Feb. 0.0388 0.0346 0.0369
01:01-02:00, Sat., 28 Feb. 0.0387 0.0350 0.0366
00:01-01:00, Sat., 28 Feb. 0.0391 0.0339 0.0364
23:01-24:00, Fri., 27 Feb. 0.0388 0.0345 0.0368
22:01-23:00, Fri., 27 Feb. 0.0391 0.0348 0.0366
21:01-22:00, Fri., 27 Feb. 0.0386 0.0349 0.0365
20:01-21:00, Fri., 27 Feb. 0.0386 0.0348 0.0365
19:01-20:00, Fri., 27 Feb. 0.0388 0.0343 0.0367
18:01-19:00, Fri., 27 Feb. 0.0388 0.0335 0.0366
17:01-18:00, Fri., 27 Feb. 0.0397 0.0345 0.0368
16:01-17:00, Fri., 27 Feb. 0.0384 0.0341 0.0366
15:01-16:00, Fri., 27 Feb. 0.0391 0.0340 0.0365
14:01-15:00, Fri., 27 Feb. 0.0378 0.0336 0.0363
13:01-14:00, Fri., 27 Feb. 0.0389 0.0333 0.0364
12:01-13:00, Fri., 27 Feb. 0.0383 0.0347 0.0365
11:01-12:00, Fri., 27 Feb. 0.0391 0.0341 0.0366
10:01-11:00, Fri., 27 Feb. 0.0394 0.0343 0.0366
09:01-10:00, Fri., 27 Feb. 0.0381 0.0343 0.0364
08:01-09:00, Fri., 27 Feb. 0.0384 0.0342 0.0366
07:01-08:00, Fri., 27 Feb. 0.0384 0.0347 0.0365
06:01-07:00, Fri., 27 Feb. 0.0396 0.0346 0.0368
05:01-06:00, Fri., 27 Feb. 0.0387 0.0346 0.0367
04:01-05:00, Fri., 27 Feb. 0.0384 0.0347 0.0367
03:01-04:00, Fri., 27 Feb. 0.0391 0.0348 0.0367
02:01-03:00, Fri., 27 Feb. 0.0388 0.0340 0.0366
01:01-02:00, Fri., 27 Feb. 0.0384 0.0347 0.0367
00:01-01:00, Fri., 27 Feb. 0.0384 0.0346 0.0365
23:01-24:00, Thu., 26 Feb. 0.0386 0.0345 0.0364
22:01-23:00, Thu., 26 Feb. 0.0394 0.0346 0.0367
21:01-22:00, Thu., 26 Feb. 0.0386 0.0346 0.0366
20:01-21:00, Thu., 26 Feb. 0.0384 0.0349 0.0365
19:01-20:00, Thu., 26 Feb. 0.0385 0.0340 0.0363
18:01-19:00, Thu., 26 Feb. 0.0387 0.0350 0.0367
17:01-18:00, Thu., 26 Feb. 0.0387 0.0347 0.0366
16:01-17:00, Thu., 26 Feb. 0.0387 0.0343 0.0362
15:01-16:00, Thu., 26 Feb. 0.0384 0.0338 0.0365
14:01-15:00, Thu., 26 Feb. 0.0387 0.0346 0.0368
13:01-14:00, Thu., 26 Feb. 0.0386 0.0350 0.0365
12:01-13:00, Thu., 26 Feb. 0.0387 0.0347 0.0364
11:01-12:00, Thu., 26 Feb. 0.0385 0.0347 0.0366
10:01-11:00, Thu., 26 Feb. 0.0384 0.0344 0.0364
09:01-10:00, Thu., 26 Feb. 0.0399 0.0347 0.0366
08:01-09:00, Thu., 26 Feb. 0.0391 0.0343 0.0365
07:01-08:00, Thu., 26 Feb. 0.0384 0.0344 0.0366
06:01-07:00, Thu., 26 Feb. 0.0388 0.0347 0.0367
05:01-06:00, Thu., 26 Feb. 0.0384 0.0348 0.0367
04:01-05:00, Thu., 26 Feb. 0.0393 0.0350 0.0371
03:01-04:00, Thu., 26 Feb. 0.0394 0.0352 0.0373
02:01-03:00, Thu., 26 Feb. 0.0396 0.0353 0.0376
01:01-02:00, Thu., 26 Feb. 0.0414 0.0359 0.0387
00:01-01:00, Thu., 26 Feb. 0.0422 0.0377 0.0402
23:01-24:00, Wed., 25 Feb. 0.0416 0.0371 0.0395
22:01-23:00, Wed., 25 Feb. 0.0428 0.0384 0.0404
21:01-22:00, Wed., 25 Feb. 0.0423 0.0383 0.0407
20:01-21:00, Wed., 25 Feb. 0.0424 0.0376 0.0401
19:01-20:00, Wed., 25 Feb. 0.0428 0.0377 0.0401
18:01-19:00, Wed., 25 Feb. 0.0416 0.0377 0.0392
17:01-18:00, Wed., 25 Feb. 0.0400 0.0353 0.0381
16:01-17:00, Wed., 25 Feb. 0.0415 0.0362 0.0390
15:01-16:00, Wed., 25 Feb. 0.0430 0.0371 0.0404
14:01-15:00, Wed., 25 Feb. 0.0437 0.0382 0.0410
13:01-14:00, Wed., 25 Feb. 0.0443 0.0395 0.0421
12:01-13:00, Wed., 25 Feb. 0.0436 0.0386 0.0411
11:01-12:00, Wed., 25 Feb. 0.0426 0.0375 0.0402
10:01-11:00, Wed., 25 Feb. 0.0419 0.0366 0.0386
09:01-10:00, Wed., 25 Feb. 0.0412 0.0374 0.0392
08:01-09:00, Wed., 25 Feb. 0.0418 0.0372 0.0389
07:01-08:00, Wed., 25 Feb. 0.0416 0.0371 0.0392
06:01-07:00, Wed., 25 Feb. 0.0412 0.0354 0.0381
05:01-06:00, Wed., 25 Feb. 0.0392 0.0352 0.0375
04:01-05:00, Wed., 25 Feb. 0.0402 0.0360 0.0374
03:01-04:00, Wed., 25 Feb. 0.0393 0.0355 0.0375
02:01-03:00, Wed., 25 Feb. 0.0402 0.0354 0.0374
01:01-02:00, Wed., 25 Feb. 0.0391 0.0350 0.0372
00:01-01:00, Wed., 25 Feb. 0.0393 0.0347 0.0373
23:01-24:00, Tue., 24 Feb. 0.0393 0.0342 0.0372
22:01-23:00, Tue., 24 Feb. 0.0386 0.0349 0.0372