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
20:01-21:00, Sun., 15 Jun. 0.0343 0.0292 0.0313
19:01-20:00, Sun., 15 Jun. 0.0337 0.0289 0.0313
18:01-19:00, Sun., 15 Jun. 0.0339 0.0297 0.0316
17:01-18:00, Sun., 15 Jun. 0.0339 0.0298 0.0316
16:01-17:00, Sun., 15 Jun. 0.0343 0.0293 0.0317
15:01-16:00, Sun., 15 Jun. 0.0352 0.0304 0.0325
14:01-15:00, Sun., 15 Jun. 0.0351 0.0297 0.0329
13:01-14:00, Sun., 15 Jun. 0.0342 0.0300 0.0320
12:01-13:00, Sun., 15 Jun. 0.0336 0.0294 0.0318
11:01-12:00, Sun., 15 Jun. 0.0338 0.0288 0.0313
10:01-11:00, Sun., 15 Jun. 0.0334 0.0289 0.0312
09:01-10:00, Sun., 15 Jun. 0.0338 0.0294 0.0311
08:01-09:00, Sun., 15 Jun. 0.0343 0.0300 0.0321
07:01-08:00, Sun., 15 Jun. 0.0364 0.0318 0.0339
06:01-07:00, Sun., 15 Jun. 0.0382 0.0333 0.0356
05:01-06:00, Sun., 15 Jun. 0.0397 0.0326 0.0362
04:01-05:00, Sun., 15 Jun. 0.0354 0.0290 0.0316
03:01-04:00, Sun., 15 Jun. 0.0331 0.0291 0.0312
02:01-03:00, Sun., 15 Jun. 0.0337 0.0297 0.0314
01:01-02:00, Sun., 15 Jun. 0.0352 0.0304 0.0324
00:01-01:00, Sun., 15 Jun. 0.0351 0.0304 0.0332
23:01-24:00, Sat., 14 Jun. 0.0357 0.0297 0.0334
22:01-23:00, Sat., 14 Jun. 0.0432 0.0338 0.0375
21:01-22:00, Sat., 14 Jun. 0.0422 0.0360 0.0389
20:01-21:00, Sat., 14 Jun. 0.0404 0.0336 0.0372
19:01-20:00, Sat., 14 Jun. 0.0367 0.0309 0.0332
18:01-19:00, Sat., 14 Jun. 0.0347 0.0305 0.0323
17:01-18:00, Sat., 14 Jun. 0.0346 0.0293 0.0318
16:01-17:00, Sat., 14 Jun. 0.0342 0.0294 0.0322
15:01-16:00, Sat., 14 Jun. 0.0340 0.0304 0.0322
14:01-15:00, Sat., 14 Jun. 0.0338 0.0300 0.0319
13:01-14:00, Sat., 14 Jun. 0.0346 0.0292 0.0320
12:01-13:00, Sat., 14 Jun. 0.0345 0.0295 0.0322
11:01-12:00, Sat., 14 Jun. 0.0333 0.0297 0.0318
10:01-11:00, Sat., 14 Jun. 0.0352 0.0292 0.0317
09:01-10:00, Sat., 14 Jun. 0.0337 0.0299 0.0319
08:01-09:00, Sat., 14 Jun. 0.0343 0.0304 0.0322
07:01-08:00, Sat., 14 Jun. 0.0346 0.0294 0.0316
06:01-07:00, Sat., 14 Jun. 0.0335 0.0297 0.0318
05:01-06:00, Sat., 14 Jun. 0.0336 0.0293 0.0316
04:01-05:00, Sat., 14 Jun. 0.0341 0.0284 0.0317
03:01-04:00, Sat., 14 Jun. 0.0354 0.0279 0.0318
02:01-03:00, Sat., 14 Jun. 0.0337 0.0290 0.0315
01:01-02:00, Sat., 14 Jun. 0.0337 0.0292 0.0317
00:01-01:00, Sat., 14 Jun. 0.0342 0.0296 0.0318
23:01-24:00, Fri., 13 Jun. 0.0341 0.0294 0.0316
22:01-23:00, Fri., 13 Jun. 0.0342 0.0288 0.0317
21:01-22:00, Fri., 13 Jun. 0.0340 0.0294 0.0315
20:01-21:00, Fri., 13 Jun. 0.0339 0.0289 0.0312
19:01-20:00, Fri., 13 Jun. 0.0342 0.0288 0.0314
18:01-19:00, Fri., 13 Jun. 0.0340 0.0297 0.0317
17:01-18:00, Fri., 13 Jun. 0.0333 0.0301 0.0318
16:01-17:00, Fri., 13 Jun. 0.0346 0.0300 0.0318
15:01-16:00, Fri., 13 Jun. 0.0343 0.0295 0.0317
14:01-15:00, Fri., 13 Jun. 0.0339 0.0282 0.0316
13:01-14:00, Fri., 13 Jun. 0.0342 0.0299 0.0316
12:01-13:00, Fri., 13 Jun. 0.0338 0.0306 0.0319
11:01-12:00, Fri., 13 Jun. 0.0343 0.0297 0.0319
10:01-11:00, Fri., 13 Jun. 0.0353 0.0294 0.0320
09:01-10:00, Fri., 13 Jun. 0.0339 0.0295 0.0316
08:01-09:00, Fri., 13 Jun. 0.0342 0.0299 0.0318
07:01-08:00, Fri., 13 Jun. 0.0346 0.0294 0.0316
06:01-07:00, Fri., 13 Jun. 0.0337 0.0288 0.0317
05:01-06:00, Fri., 13 Jun. 0.0348 0.0300 0.0318
04:01-05:00, Fri., 13 Jun. 0.0336 0.0295 0.0315
03:01-04:00, Fri., 13 Jun. 0.0332 0.0295 0.0316
02:01-03:00, Fri., 13 Jun. 0.0336 0.0286 0.0317
01:01-02:00, Fri., 13 Jun. 0.0337 0.0288 0.0314
00:01-01:00, Fri., 13 Jun. 0.0339 0.0290 0.0318
23:01-24:00, Thu., 12 Jun. 0.0339 0.0294 0.0317
22:01-23:00, Thu., 12 Jun. 0.0336 0.0289 0.0319
21:01-22:00, Thu., 12 Jun. 0.0334 0.0293 0.0314
20:01-21:00, Thu., 12 Jun. 0.0331 0.0292 0.0316
19:01-20:00, Thu., 12 Jun. 0.0339 0.0296 0.0315
18:01-19:00, Thu., 12 Jun. 0.0345 0.0297 0.0316
17:01-18:00, Thu., 12 Jun. 0.0342 0.0287 0.0315
16:01-17:00, Thu., 12 Jun. 0.0338 0.0286 0.0316
15:01-16:00, Thu., 12 Jun. 0.0336 0.0298 0.0317
14:01-15:00, Thu., 12 Jun. 0.0343 0.0300 0.0321
13:01-14:00, Thu., 12 Jun. 0.0357 0.0297 0.0321
12:01-13:00, Thu., 12 Jun. 0.0343 0.0290 0.0319
11:01-12:00, Thu., 12 Jun. 0.0352 0.0301 0.0320
10:01-11:00, Thu., 12 Jun. 0.0346 0.0293 0.0319
09:01-10:00, Thu., 12 Jun. 0.0337 0.0304 0.0320
08:01-09:00, Thu., 12 Jun. 0.0348 0.0295 0.0321
07:01-08:00, Thu., 12 Jun. 0.0348 0.0294 0.0320
06:01-07:00, Thu., 12 Jun. 0.0336 0.0292 0.0317
05:01-06:00, Thu., 12 Jun. 0.0335 0.0292 0.0317
04:01-05:00, Thu., 12 Jun. 0.0343 0.0294 0.0317
03:01-04:00, Thu., 12 Jun. 0.0337 0.0290 0.0314
02:01-03:00, Thu., 12 Jun. 0.0332 0.0301 0.0314
01:01-02:00, Thu., 12 Jun. 0.0346 0.0291 0.0316
00:01-01:00, Thu., 12 Jun. 0.0339 0.0290 0.0312
23:01-24:00, Wed., 11 Jun. 0.0336 0.0291 0.0312
22:01-23:00, Wed., 11 Jun. 0.0338 0.0288 0.0312
21:01-22:00, Wed., 11 Jun. 0.0329 0.0289 0.0312
20:01-21:00, Wed., 11 Jun. 0.0334 0.0293 0.0313
19:01-20:00, Wed., 11 Jun. 0.0332 0.0291 0.0314
18:01-19:00, Wed., 11 Jun. 0.0345 0.0299 0.0320
17:01-18:00, Wed., 11 Jun. 0.0360 0.0309 0.0339
16:01-17:00, Wed., 11 Jun. 0.0451 0.0339 0.0396
15:01-16:00, Wed., 11 Jun. 0.0450 0.0329 0.0404
14:01-15:00, Wed., 11 Jun. 0.0374 0.0303 0.0338
13:01-14:00, Wed., 11 Jun. 0.0344 0.0295 0.0319
12:01-13:00, Wed., 11 Jun. 0.0345 0.0295 0.0320
11:01-12:00, Wed., 11 Jun. 0.0343 0.0303 0.0322
10:01-11:00, Wed., 11 Jun. 0.0341 0.0289 0.0320
09:01-10:00, Wed., 11 Jun. 0.0344 0.0298 0.0320
08:01-09:00, Wed., 11 Jun. 0.0356 0.0299 0.0337
07:01-08:00, Wed., 11 Jun. 0.0382 0.0328 0.0358
06:01-07:00, Wed., 11 Jun. 0.0356 0.0301 0.0326
05:01-06:00, Wed., 11 Jun. 0.0339 0.0296 0.0315
04:01-05:00, Wed., 11 Jun. 0.0338 0.0290 0.0311
03:01-04:00, Wed., 11 Jun. 0.0339 0.0295 0.0318
02:01-03:00, Wed., 11 Jun. 0.0338 0.0290 0.0313
01:01-02:00, Wed., 11 Jun. 0.0331 0.0283 0.0309
00:01-01:00, Wed., 11 Jun. 0.0332 0.0289 0.0311
23:01-24:00, Tue., 10 Jun. 0.0333 0.0286 0.0310
22:01-23:00, Tue., 10 Jun. 0.0336 0.0292 0.0315
21:01-22:00, Tue., 10 Jun. 0.0344 0.0299 0.0324
20:01-21:00, Tue., 10 Jun. 0.0330 0.0293 0.0311
19:01-20:00, Tue., 10 Jun. 0.0341 0.0290 0.0308
18:01-19:00, Tue., 10 Jun. 0.0344 0.0284 0.0309
17:01-18:00, Tue., 10 Jun. 0.0343 0.0288 0.0315
16:01-17:00, Tue., 10 Jun. 0.0359 0.0308 0.0331
15:01-16:00, Tue., 10 Jun. 0.0430 0.0335 0.0389
14:01-15:00, Tue., 10 Jun. 0.0436 0.0374 0.0405
13:01-14:00, Tue., 10 Jun. 0.0430 0.0360 0.0388
12:01-13:00, Tue., 10 Jun. 0.0402 0.0332 0.0367
11:01-12:00, Tue., 10 Jun. 0.0402 0.0339 0.0366
10:01-11:00, Tue., 10 Jun. 0.0443 0.0340 0.0380
09:01-10:00, Tue., 10 Jun. 0.0499 0.0412 0.0453
08:01-09:00, Tue., 10 Jun. 0.0449 0.0361 0.0398
07:01-08:00, Tue., 10 Jun. 0.0428 0.0367 0.0392
06:01-07:00, Tue., 10 Jun. 0.0462 0.0364 0.0406
05:01-06:00, Tue., 10 Jun. 0.0468 0.0373 0.0426
04:01-05:00, Tue., 10 Jun. 0.0407 0.0352 0.0375
03:01-04:00, Tue., 10 Jun. 0.0393 0.0328 0.0367
02:01-03:00, Tue., 10 Jun. 0.0402 0.0334 0.0361
01:01-02:00, Tue., 10 Jun. 0.0375 0.0307 0.0339
00:01-01:00, Tue., 10 Jun. 0.0385 0.0320 0.0346
23:01-24:00, Mon., 09 Jun. 0.0395 0.0332 0.0363
22:01-23:00, Mon., 09 Jun. 0.0402 0.0340 0.0366
21:01-22:00, Mon., 09 Jun. 0.0405 0.0324 0.0359
20:01-21:00, Mon., 09 Jun. 0.0368 0.0305 0.0338
19:01-20:00, Mon., 09 Jun. 0.0358 0.0312 0.0333
18:01-19:00, Mon., 09 Jun. 0.0371 0.0319 0.0347
17:01-18:00, Mon., 09 Jun. 0.0398 0.0343 0.0373
16:01-17:00, Mon., 09 Jun. 0.0412 0.0352 0.0387
15:01-16:00, Mon., 09 Jun. 0.0379 0.0308 0.0337
14:01-15:00, Mon., 09 Jun. 0.0343 0.0294 0.0319
13:01-14:00, Mon., 09 Jun. 0.0346 0.0295 0.0318
12:01-13:00, Mon., 09 Jun. 0.0339 0.0299 0.0320
11:01-12:00, Mon., 09 Jun. 0.0337 0.0300 0.0319
10:01-11:00, Mon., 09 Jun. 0.0332 0.0285 0.0313
09:01-10:00, Mon., 09 Jun. 0.0344 0.0289 0.0318
08:01-09:00, Mon., 09 Jun. 0.0343 0.0297 0.0319
07:01-08:00, Mon., 09 Jun. 0.0352 0.0294 0.0319
06:01-07:00, Mon., 09 Jun. 0.0341 0.0298 0.0320
05:01-06:00, Mon., 09 Jun. 0.0345 0.0301 0.0321
04:01-05:00, Mon., 09 Jun. 0.0342 0.0297 0.0321
03:01-04:00, Mon., 09 Jun. 0.0347 0.0296 0.0320
02:01-03:00, Mon., 09 Jun. 0.0353 0.0302 0.0322
01:01-02:00, Mon., 09 Jun. 0.0344 0.0287 0.0322
00:01-01:00, Mon., 09 Jun. 0.0343 0.0299 0.0322
23:01-24:00, Sun., 08 Jun. 0.0343 0.0296 0.0321
22:01-23:00, Sun., 08 Jun. 0.0349 0.0290 0.0322
21:01-22:00, Sun., 08 Jun. 0.0342 0.0301 0.0322
20:01-21:00, Sun., 08 Jun. 0.0347 0.0300 0.0320
19:01-20:00, Sun., 08 Jun. 0.0336 0.0297 0.0318
18:01-19:00, Sun., 08 Jun. 0.0341 0.0297 0.0317
17:01-18:00, Sun., 08 Jun. 0.0345 0.0292 0.0318
16:01-17:00, Sun., 08 Jun. 0.0349 0.0298 0.0321
15:01-16:00, Sun., 08 Jun. 0.0348 0.0298 0.0321
14:01-15:00, Sun., 08 Jun. 0.0339 0.0288 0.0320
13:01-14:00, Sun., 08 Jun. 0.0343 0.0297 0.0317
12:01-13:00, Sun., 08 Jun. 0.0345 0.0288 0.0318
11:01-12:00, Sun., 08 Jun. 0.0342 0.0297 0.0321
10:01-11:00, Sun., 08 Jun. 0.0349 0.0294 0.0324
09:01-10:00, Sun., 08 Jun. 0.0374 0.0311 0.0338
08:01-09:00, Sun., 08 Jun. 0.0403 0.0339 0.0372
07:01-08:00, Sun., 08 Jun. 0.0403 0.0342 0.0368
06:01-07:00, Sun., 08 Jun. 0.0363 0.0308 0.0335
05:01-06:00, Sun., 08 Jun. 0.0353 0.0315 0.0334
04:01-05:00, Sun., 08 Jun. 0.0352 0.0300 0.0326
03:01-04:00, Sun., 08 Jun. 0.0339 0.0303 0.0318
02:01-03:00, Sun., 08 Jun. 0.0342 0.0292 0.0318
01:01-02:00, Sun., 08 Jun. 0.0347 0.0296 0.0318
00:01-01:00, Sun., 08 Jun. 0.0336 0.0299 0.0317
23:01-24:00, Sat., 07 Jun. 0.0337 0.0294 0.0316
22:01-23:00, Sat., 07 Jun. 0.0338 0.0287 0.0316
21:01-22:00, Sat., 07 Jun. 0.0338 0.0297 0.0318
20:01-21:00, Sat., 07 Jun. 0.0339 0.0292 0.0316
19:01-20:00, Sat., 07 Jun. 0.0330 0.0288 0.0312
18:01-19:00, Sat., 07 Jun. 0.0344 0.0290 0.0315
17:01-18:00, Sat., 07 Jun. 0.0352 0.0283 0.0312
16:01-17:00, Sat., 07 Jun. 0.0346 0.0300 0.0319
15:01-16:00, Sat., 07 Jun. 0.0341 0.0284 0.0318
14:01-15:00, Sat., 07 Jun. 0.0342 0.0291 0.0319
13:01-14:00, Sat., 07 Jun. 0.0341 0.0294 0.0318
12:01-13:00, Sat., 07 Jun. 0.0341 0.0292 0.0317
11:01-12:00, Sat., 07 Jun. 0.0342 0.0280 0.0317
10:01-11:00, Sat., 07 Jun. 0.0342 0.0286 0.0316
09:01-10:00, Sat., 07 Jun. 0.0339 0.0288 0.0314
08:01-09:00, Sat., 07 Jun. 0.0345 0.0297 0.0319
07:01-08:00, Sat., 07 Jun. 0.0332 0.0290 0.0314
06:01-07:00, Sat., 07 Jun. 0.0344 0.0300 0.0316
05:01-06:00, Sat., 07 Jun. 0.0335 0.0298 0.0315
04:01-05:00, Sat., 07 Jun. 0.0341 0.0291 0.0317
03:01-04:00, Sat., 07 Jun. 0.0340 0.0292 0.0316
02:01-03:00, Sat., 07 Jun. 0.0336 0.0292 0.0316
01:01-02:00, Sat., 07 Jun. 0.0340 0.0295 0.0317
00:01-01:00, Sat., 07 Jun. 0.0336 0.0297 0.0315
23:01-24:00, Fri., 06 Jun. 0.0333 0.0298 0.0316
22:01-23:00, Fri., 06 Jun. 0.0334 0.0295 0.0315
21:01-22:00, Fri., 06 Jun. 0.0347 0.0294 0.0313
20:01-21:00, Fri., 06 Jun. 0.0342 0.0290 0.0314
19:01-20:00, Fri., 06 Jun. 0.0332 0.0295 0.0311
18:01-19:00, Fri., 06 Jun. 0.0339 0.0291 0.0312
17:01-18:00, Fri., 06 Jun. 0.0338 0.0293 0.0314
16:01-17:00, Fri., 06 Jun. 0.0340 0.0287 0.0317
15:01-16:00, Fri., 06 Jun. 0.0339 0.0297 0.0319
14:01-15:00, Fri., 06 Jun. 0.0344 0.0288 0.0317
13:01-14:00, Fri., 06 Jun. 0.0341 0.0293 0.0317
12:01-13:00, Fri., 06 Jun. 0.0344 0.0297 0.0319
11:01-12:00, Fri., 06 Jun. 0.0337 0.0294 0.0316
10:01-11:00, Fri., 06 Jun. 0.0339 0.0285 0.0318
09:01-10:00, Fri., 06 Jun. 0.0345 0.0302 0.0321
08:01-09:00, Fri., 06 Jun. 0.0341 0.0297 0.0323
07:01-08:00, Fri., 06 Jun. 0.0346 0.0305 0.0326
06:01-07:00, Fri., 06 Jun. 0.0349 0.0304 0.0326
05:01-06:00, Fri., 06 Jun. 0.0355 0.0304 0.0325
04:01-05:00, Fri., 06 Jun. 0.0339 0.0298 0.0319
03:01-04:00, Fri., 06 Jun. 0.0344 0.0302 0.0320
02:01-03:00, Fri., 06 Jun. 0.0340 0.0301 0.0318
01:01-02:00, Fri., 06 Jun. 0.0343 0.0289 0.0317
00:01-01:00, Fri., 06 Jun. 0.0346 0.0299 0.0318
23:01-24:00, Thu., 05 Jun. 0.0339 0.0290 0.0318
22:01-23:00, Thu., 05 Jun. 0.0340 0.0294 0.0316
21:01-22:00, Thu., 05 Jun. 0.0342 0.0294 0.0317