Radiation doses in the air / Measurement results by the hour (Ota)

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
05:01-06:00, Sat., 07 Nov. 0.0339 0.0297 0.0316
04:01-05:00, Sat., 07 Nov. 0.0334 0.0298 0.0316
03:01-04:00, Sat., 07 Nov. 0.0338 0.0297 0.0317
02:01-03:00, Sat., 07 Nov. 0.0338 0.0283 0.0316
01:01-02:00, Sat., 07 Nov. 0.0337 0.0298 0.0315
00:01-01:00, Sat., 07 Nov. 0.0336 0.0293 0.0312
23:01-24:00, Fri., 06 Nov. 0.0339 0.0294 0.0312
22:01-23:00, Fri., 06 Nov. 0.0337 0.0294 0.0311
21:01-22:00, Fri., 06 Nov. 0.0339 0.0298 0.0317
20:01-21:00, Fri., 06 Nov. 0.0338 0.0295 0.0317
19:01-20:00, Fri., 06 Nov. 0.0339 0.0290 0.0318
18:01-19:00, Fri., 06 Nov. 0.0336 0.0300 0.0316
17:01-18:00, Fri., 06 Nov. 0.0340 0.0295 0.0316
16:01-17:00, Fri., 06 Nov. 0.0348 0.0301 0.0319
15:01-16:00, Fri., 06 Nov. 0.0338 0.0294 0.0315
14:01-15:00, Fri., 06 Nov. 0.0346 0.0290 0.0319
13:01-14:00, Fri., 06 Nov. 0.0347 0.0290 0.0318
12:01-13:00, Fri., 06 Nov. 0.0339 0.0290 0.0317
11:01-12:00, Fri., 06 Nov. 0.0353 0.0301 0.0323
10:01-11:00, Fri., 06 Nov. 0.0344 0.0291 0.0318
09:01-10:00, Fri., 06 Nov. 0.0339 0.0296 0.0319
08:01-09:00, Fri., 06 Nov. 0.0347 0.0299 0.0320
07:01-08:00, Fri., 06 Nov. 0.0342 0.0301 0.0319
06:01-07:00, Fri., 06 Nov. 0.0340 0.0291 0.0316
05:01-06:00, Fri., 06 Nov. 0.0344 0.0297 0.0316
04:01-05:00, Fri., 06 Nov. 0.0341 0.0294 0.0316
03:01-04:00, Fri., 06 Nov. 0.0338 0.0297 0.0315
02:01-03:00, Fri., 06 Nov. 0.0332 0.0293 0.0312
01:01-02:00, Fri., 06 Nov. 0.0333 0.0280 0.0311
00:01-01:00, Fri., 06 Nov. 0.0336 0.0289 0.0312
23:01-24:00, Thu., 05 Nov. 0.0335 0.0286 0.0313
22:01-23:00, Thu., 05 Nov. 0.0333 0.0279 0.0312
21:01-22:00, Thu., 05 Nov. 0.0330 0.0288 0.0310
20:01-21:00, Thu., 05 Nov. 0.0333 0.0286 0.0311
19:01-20:00, Thu., 05 Nov. 0.0331 0.0285 0.0309
18:01-19:00, Thu., 05 Nov. 0.0336 0.0287 0.0313
17:01-18:00, Thu., 05 Nov. 0.0325 0.0290 0.0310
16:01-17:00, Thu., 05 Nov. 0.0341 0.0290 0.0313
15:01-16:00, Thu., 05 Nov. 0.0331 0.0287 0.0309
14:01-15:00, Thu., 05 Nov. 0.0346 0.0294 0.0315
13:01-14:00, Thu., 05 Nov. 0.0342 0.0286 0.0313
12:01-13:00, Thu., 05 Nov. 0.0342 0.0285 0.0317
11:01-12:00, Thu., 05 Nov. 0.0352 0.0304 0.0327
10:01-11:00, Thu., 05 Nov. 0.0365 0.0303 0.0336
09:01-10:00, Thu., 05 Nov. 0.0386 0.0331 0.0356
08:01-09:00, Thu., 05 Nov. 0.0397 0.0344 0.0369
07:01-08:00, Thu., 05 Nov. 0.0475 0.0366 0.0418
06:01-07:00, Thu., 05 Nov. 0.0503 0.0457 0.0478
05:01-06:00, Thu., 05 Nov. 0.0506 0.0420 0.0461
04:01-05:00, Thu., 05 Nov. 0.0549 0.0449 0.0504
03:01-04:00, Thu., 05 Nov. 0.0573 0.0508 0.0543
02:01-03:00, Thu., 05 Nov. 0.0549 0.0433 0.0486
01:01-02:00, Thu., 05 Nov. 0.0471 0.0378 0.0430
00:01-01:00, Thu., 05 Nov. 0.0492 0.0450 0.0469
23:01-24:00, Wed., 04 Nov. 0.0513 0.0442 0.0478
22:01-23:00, Wed., 04 Nov. 0.0621 0.0471 0.0557
21:01-22:00, Wed., 04 Nov. 0.0642 0.0551 0.0603
20:01-21:00, Wed., 04 Nov. 0.0574 0.0464 0.0523
19:01-20:00, Wed., 04 Nov. 0.0481 0.0419 0.0446
18:01-19:00, Wed., 04 Nov. 0.0530 0.0429 0.0484
17:01-18:00, Wed., 04 Nov. 0.0589 0.0462 0.0516
16:01-17:00, Wed., 04 Nov. 0.0590 0.0459 0.0513
15:01-16:00, Wed., 04 Nov. 0.0561 0.0450 0.0504
14:01-15:00, Wed., 04 Nov. 0.0582 0.0486 0.0537
13:01-14:00, Wed., 04 Nov. 0.0521 0.0324 0.0397
12:01-13:00, Wed., 04 Nov. 0.0357 0.0304 0.0330
11:01-12:00, Wed., 04 Nov. 0.0366 0.0307 0.0327
10:01-11:00, Wed., 04 Nov. 0.0395 0.0319 0.0354
09:01-10:00, Wed., 04 Nov. 0.0396 0.0318 0.0358
08:01-09:00, Wed., 04 Nov. 0.0356 0.0301 0.0324
07:01-08:00, Wed., 04 Nov. 0.0342 0.0293 0.0318
06:01-07:00, Wed., 04 Nov. 0.0336 0.0290 0.0316
05:01-06:00, Wed., 04 Nov. 0.0328 0.0298 0.0315
04:01-05:00, Wed., 04 Nov. 0.0343 0.0296 0.0315
03:01-04:00, Wed., 04 Nov. 0.0338 0.0289 0.0315
02:01-03:00, Wed., 04 Nov. 0.0339 0.0295 0.0311
01:01-02:00, Wed., 04 Nov. 0.0339 0.0297 0.0316
00:01-01:00, Wed., 04 Nov. 0.0339 0.0295 0.0314
23:01-24:00, Tue., 03 Nov. 0.0329 0.0287 0.0313
22:01-23:00, Tue., 03 Nov. 0.0333 0.0281 0.0313
21:01-22:00, Tue., 03 Nov. 0.0338 0.0290 0.0313
20:01-21:00, Tue., 03 Nov. 0.0332 0.0279 0.0312
19:01-20:00, Tue., 03 Nov. 0.0346 0.0291 0.0313
18:01-19:00, Tue., 03 Nov. 0.0345 0.0289 0.0313
17:01-18:00, Tue., 03 Nov. 0.0337 0.0291 0.0312
16:01-17:00, Tue., 03 Nov. 0.0336 0.0294 0.0315
15:01-16:00, Tue., 03 Nov. 0.0330 0.0289 0.0315
14:01-15:00, Tue., 03 Nov. 0.0341 0.0301 0.0315
13:01-14:00, Tue., 03 Nov. 0.0339 0.0290 0.0316
12:01-13:00, Tue., 03 Nov. 0.0340 0.0290 0.0317
11:01-12:00, Tue., 03 Nov. 0.0342 0.0281 0.0315
10:01-11:00, Tue., 03 Nov. 0.0334 0.0290 0.0313
09:01-10:00, Tue., 03 Nov. 0.0338 0.0290 0.0315
08:01-09:00, Tue., 03 Nov. 0.0339 0.0294 0.0314
07:01-08:00, Tue., 03 Nov. 0.0349 0.0295 0.0317
06:01-07:00, Tue., 03 Nov. 0.0346 0.0290 0.0318
05:01-06:00, Tue., 03 Nov. 0.0339 0.0291 0.0319
04:01-05:00, Tue., 03 Nov. 0.0350 0.0301 0.0320
03:01-04:00, Tue., 03 Nov. 0.0343 0.0293 0.0316
02:01-03:00, Tue., 03 Nov. 0.0336 0.0294 0.0315
01:01-02:00, Tue., 03 Nov. 0.0338 0.0288 0.0314
00:01-01:00, Tue., 03 Nov. 0.0336 0.0288 0.0317
23:01-24:00, Mon., 02 Nov. 0.0335 0.0287 0.0316
22:01-23:00, Mon., 02 Nov. 0.0337 0.0295 0.0316
21:01-22:00, Mon., 02 Nov. 0.0350 0.0301 0.0319
20:01-21:00, Mon., 02 Nov. 0.0383 0.0309 0.0343
19:01-20:00, Mon., 02 Nov. 0.0513 0.0348 0.0423
18:01-19:00, Mon., 02 Nov. 0.0729 0.0499 0.0626
17:01-18:00, Mon., 02 Nov. 0.0771 0.0630 0.0708
16:01-17:00, Mon., 02 Nov. 0.0656 0.0452 0.0535
15:01-16:00, Mon., 02 Nov. 0.0503 0.0430 0.0465
14:01-15:00, Mon., 02 Nov. 0.0464 0.0391 0.0433
13:01-14:00, Mon., 02 Nov. 0.0443 0.0359 0.0401
12:01-13:00, Mon., 02 Nov. 0.0374 0.0318 0.0343
11:01-12:00, Mon., 02 Nov. 0.0352 0.0308 0.0330
10:01-11:00, Mon., 02 Nov. 0.0356 0.0310 0.0327
09:01-10:00, Mon., 02 Nov. 0.0353 0.0305 0.0326
08:01-09:00, Mon., 02 Nov. 0.0351 0.0301 0.0322
07:01-08:00, Mon., 02 Nov. 0.0364 0.0304 0.0326
06:01-07:00, Mon., 02 Nov. 0.0350 0.0304 0.0325
05:01-06:00, Mon., 02 Nov. 0.0351 0.0304 0.0325
04:01-05:00, Mon., 02 Nov. 0.0351 0.0304 0.0322
03:01-04:00, Mon., 02 Nov. 0.0344 0.0291 0.0322
02:01-03:00, Mon., 02 Nov. 0.0352 0.0304 0.0322
01:01-02:00, Mon., 02 Nov. 0.0349 0.0300 0.0322
00:01-01:00, Mon., 02 Nov. 0.0345 0.0300 0.0318
23:01-24:00, Sun., 01 Nov. 0.0347 0.0296 0.0317
22:01-23:00, Sun., 01 Nov. 0.0339 0.0303 0.0320
21:01-22:00, Sun., 01 Nov. 0.0337 0.0292 0.0318
20:01-21:00, Sun., 01 Nov. 0.0346 0.0292 0.0317
19:01-20:00, Sun., 01 Nov. 0.0343 0.0288 0.0318
18:01-19:00, Sun., 01 Nov. 0.0337 0.0291 0.0317
17:01-18:00, Sun., 01 Nov. 0.0339 0.0292 0.0316
16:01-17:00, Sun., 01 Nov. 0.0334 0.0301 0.0318
15:01-16:00, Sun., 01 Nov. 0.0343 0.0291 0.0320
14:01-15:00, Sun., 01 Nov. 0.0346 0.0298 0.0323
13:01-14:00, Sun., 01 Nov. 0.0356 0.0300 0.0321
12:01-13:00, Sun., 01 Nov. 0.0343 0.0299 0.0319
11:01-12:00, Sun., 01 Nov. 0.0337 0.0303 0.0319
10:01-11:00, Sun., 01 Nov. 0.0360 0.0298 0.0321
09:01-10:00, Sun., 01 Nov. 0.0339 0.0295 0.0321
08:01-09:00, Sun., 01 Nov. 0.0349 0.0290 0.0322
07:01-08:00, Sun., 01 Nov. 0.0340 0.0296 0.0320
06:01-07:00, Sun., 01 Nov. 0.0345 0.0294 0.0320
05:01-06:00, Sun., 01 Nov. 0.0351 0.0297 0.0319
04:01-05:00, Sun., 01 Nov. 0.0348 0.0301 0.0319
03:01-04:00, Sun., 01 Nov. 0.0337 0.0290 0.0318
02:01-03:00, Sun., 01 Nov. 0.0339 0.0294 0.0318
01:01-02:00, Sun., 01 Nov. 0.0343 0.0285 0.0316
00:01-01:00, Sun., 01 Nov. 0.0346 0.0285 0.0316
23:01-24:00, Sat., 31 Oct. 0.0340 0.0299 0.0315
22:01-23:00, Sat., 31 Oct. 0.0335 0.0294 0.0316
21:01-22:00, Sat., 31 Oct. 0.0335 0.0295 0.0313
20:01-21:00, Sat., 31 Oct. 0.0341 0.0287 0.0314
19:01-20:00, Sat., 31 Oct. 0.0340 0.0291 0.0314
18:01-19:00, Sat., 31 Oct. 0.0331 0.0290 0.0314
17:01-18:00, Sat., 31 Oct. 0.0336 0.0290 0.0317
16:01-17:00, Sat., 31 Oct. 0.0342 0.0296 0.0318
15:01-16:00, Sat., 31 Oct. 0.0342 0.0297 0.0320
14:01-15:00, Sat., 31 Oct. 0.0335 0.0297 0.0319
13:01-14:00, Sat., 31 Oct. 0.0346 0.0300 0.0320
12:01-13:00, Sat., 31 Oct. 0.0342 0.0307 0.0324
11:01-12:00, Sat., 31 Oct. 0.0345 0.0302 0.0325
10:01-11:00, Sat., 31 Oct. 0.0351 0.0309 0.0331
09:01-10:00, Sat., 31 Oct. 0.0353 0.0301 0.0329
08:01-09:00, Sat., 31 Oct. 0.0349 0.0303 0.0328
07:01-08:00, Sat., 31 Oct. 0.0354 0.0294 0.0323
06:01-07:00, Sat., 31 Oct. 0.0348 0.0300 0.0322
05:01-06:00, Sat., 31 Oct. 0.0345 0.0301 0.0324
04:01-05:00, Sat., 31 Oct. 0.0346 0.0290 0.0316
03:01-04:00, Sat., 31 Oct. 0.0338 0.0296 0.0317
02:01-03:00, Sat., 31 Oct. 0.0344 0.0311 0.0326
01:01-02:00, Sat., 31 Oct. 0.0353 0.0308 0.0330
00:01-01:00, Sat., 31 Oct. 0.0351 0.0304 0.0322
23:01-24:00, Fri., 30 Oct. 0.0349 0.0300 0.0319
22:01-23:00, Fri., 30 Oct. 0.0352 0.0288 0.0321
21:01-22:00, Fri., 30 Oct. 0.0349 0.0301 0.0323
20:01-21:00, Fri., 30 Oct. 0.0346 0.0294 0.0320
19:01-20:00, Fri., 30 Oct. 0.0336 0.0301 0.0319
18:01-19:00, Fri., 30 Oct. 0.0332 0.0294 0.0317
17:01-18:00, Fri., 30 Oct. 0.0338 0.0290 0.0317
16:01-17:00, Fri., 30 Oct. 0.0347 0.0290 0.0317
15:01-16:00, Fri., 30 Oct. 0.0346 0.0293 0.0320
14:01-15:00, Fri., 30 Oct. 0.0339 0.0293 0.0315
13:01-14:00, Fri., 30 Oct. 0.0340 0.0295 0.0317
12:01-13:00, Fri., 30 Oct. 0.0339 0.0298 0.0319
11:01-12:00, Fri., 30 Oct. 0.0337 0.0304 0.0319
10:01-11:00, Fri., 30 Oct. 0.0342 0.0300 0.0317
09:01-10:00, Fri., 30 Oct. 0.0332 0.0291 0.0313
08:01-09:00, Fri., 30 Oct. 0.0354 0.0288 0.0316
07:01-08:00, Fri., 30 Oct. 0.0339 0.0291 0.0317
06:01-07:00, Fri., 30 Oct. 0.0337 0.0298 0.0316
05:01-06:00, Fri., 30 Oct. 0.0337 0.0292 0.0316
04:01-05:00, Fri., 30 Oct. 0.0336 0.0293 0.0316
03:01-04:00, Fri., 30 Oct. 0.0329 0.0290 0.0309
02:01-03:00, Fri., 30 Oct. 0.0336 0.0296 0.0312
01:01-02:00, Fri., 30 Oct. 0.0334 0.0292 0.0311
00:01-01:00, Fri., 30 Oct. 0.0336 0.0287 0.0310
23:01-24:00, Thu., 29 Oct. 0.0344 0.0290 0.0314
22:01-23:00, Thu., 29 Oct. 0.0337 0.0284 0.0314
21:01-22:00, Thu., 29 Oct. 0.0332 0.0291 0.0314
20:01-21:00, Thu., 29 Oct. 0.0341 0.0283 0.0316
19:01-20:00, Thu., 29 Oct. 0.0331 0.0298 0.0314
18:01-19:00, Thu., 29 Oct. 0.0335 0.0294 0.0314
17:01-18:00, Thu., 29 Oct. 0.0336 0.0295 0.0315
16:01-17:00, Thu., 29 Oct. 0.0342 0.0290 0.0317
15:01-16:00, Thu., 29 Oct. 0.0347 0.0301 0.0322
14:01-15:00, Thu., 29 Oct. 0.0353 0.0297 0.0328
13:01-14:00, Thu., 29 Oct. 0.0339 0.0291 0.0316
12:01-13:00, Thu., 29 Oct. 0.0338 0.0283 0.0316
11:01-12:00, Thu., 29 Oct. 0.0337 0.0282 0.0313
10:01-11:00, Thu., 29 Oct. 0.0334 0.0292 0.0311
09:01-10:00, Thu., 29 Oct. 0.0343 0.0296 0.0313
08:01-09:00, Thu., 29 Oct. 0.0334 0.0287 0.0312
07:01-08:00, Thu., 29 Oct. 0.0337 0.0278 0.0310
06:01-07:00, Thu., 29 Oct. 0.0327 0.0289 0.0309
05:01-06:00, Thu., 29 Oct. 0.0343 0.0283 0.0310
04:01-05:00, Thu., 29 Oct. 0.0339 0.0288 0.0309
03:01-04:00, Thu., 29 Oct. 0.0329 0.0284 0.0310
02:01-03:00, Thu., 29 Oct. 0.0330 0.0287 0.0310
01:01-02:00, Thu., 29 Oct. 0.0340 0.0285 0.0308
00:01-01:00, Thu., 29 Oct. 0.0332 0.0290 0.0308
23:01-24:00, Wed., 28 Oct. 0.0331 0.0287 0.0310
22:01-23:00, Wed., 28 Oct. 0.0327 0.0289 0.0309
21:01-22:00, Wed., 28 Oct. 0.0332 0.0284 0.0308
20:01-21:00, Wed., 28 Oct. 0.0331 0.0286 0.0309
19:01-20:00, Wed., 28 Oct. 0.0335 0.0288 0.0310
18:01-19:00, Wed., 28 Oct. 0.0335 0.0290 0.0310
17:01-18:00, Wed., 28 Oct. 0.0334 0.0281 0.0308
16:01-17:00, Wed., 28 Oct. 0.0329 0.0283 0.0309
15:01-16:00, Wed., 28 Oct. 0.0342 0.0289 0.0311
14:01-15:00, Wed., 28 Oct. 0.0340 0.0285 0.0312
13:01-14:00, Wed., 28 Oct. 0.0337 0.0289 0.0315
12:01-13:00, Wed., 28 Oct. 0.0333 0.0287 0.0315
11:01-12:00, Wed., 28 Oct. 0.0345 0.0300 0.0321
10:01-11:00, Wed., 28 Oct. 0.0341 0.0301 0.0320
09:01-10:00, Wed., 28 Oct. 0.0343 0.0296 0.0318
08:01-09:00, Wed., 28 Oct. 0.0346 0.0303 0.0319
07:01-08:00, Wed., 28 Oct. 0.0343 0.0299 0.0316
06:01-07:00, Wed., 28 Oct. 0.0344 0.0292 0.0317