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
11:01-12:00, Fri., 11 Sep. 0.0371 0.0328 0.0347
10:01-11:00, Fri., 11 Sep. 0.0374 0.0332 0.0355
09:01-10:00, Fri., 11 Sep. 0.0398 0.0345 0.0369
08:01-09:00, Fri., 11 Sep. 0.0408 0.0362 0.0381
07:01-08:00, Fri., 11 Sep. 0.0405 0.0356 0.0388
06:01-07:00, Fri., 11 Sep. 0.0436 0.0370 0.0402
05:01-06:00, Fri., 11 Sep. 0.0408 0.0342 0.0371
04:01-05:00, Fri., 11 Sep. 0.0384 0.0331 0.0354
03:01-04:00, Fri., 11 Sep. 0.0373 0.0291 0.0324
02:01-03:00, Fri., 11 Sep. 0.0339 0.0284 0.0313
01:01-02:00, Fri., 11 Sep. 0.0354 0.0306 0.0328
00:01-01:00, Fri., 11 Sep. 0.0400 0.0321 0.0366
23:01-24:00, Thu., 10 Sep. 0.0419 0.0332 0.0382
22:01-23:00, Thu., 10 Sep. 0.0387 0.0336 0.0360
21:01-22:00, Thu., 10 Sep. 0.0349 0.0300 0.0322
20:01-21:00, Thu., 10 Sep. 0.0358 0.0308 0.0333
19:01-20:00, Thu., 10 Sep. 0.0406 0.0334 0.0370
18:01-19:00, Thu., 10 Sep. 0.0402 0.0335 0.0366
17:01-18:00, Thu., 10 Sep. 0.0346 0.0305 0.0328
16:01-17:00, Thu., 10 Sep. 0.0372 0.0318 0.0345
15:01-16:00, Thu., 10 Sep. 0.0385 0.0316 0.0349
14:01-15:00, Thu., 10 Sep. 0.0375 0.0325 0.0348
13:01-14:00, Thu., 10 Sep. 0.0369 0.0301 0.0333
12:01-13:00, Thu., 10 Sep. 0.0355 0.0309 0.0335
11:01-12:00, Thu., 10 Sep. 0.0410 0.0325 0.0372
10:01-11:00, Thu., 10 Sep. 0.0409 0.0326 0.0372
09:01-10:00, Thu., 10 Sep. 0.0440 0.0352 0.0393
08:01-09:00, Thu., 10 Sep. 0.0438 0.0373 0.0405
07:01-08:00, Thu., 10 Sep. 0.0393 0.0306 0.0343
06:01-07:00, Thu., 10 Sep. 0.0349 0.0305 0.0327
05:01-06:00, Thu., 10 Sep. 0.0360 0.0304 0.0327
04:01-05:00, Thu., 10 Sep. 0.0348 0.0299 0.0323
03:01-04:00, Thu., 10 Sep. 0.0392 0.0326 0.0356
02:01-03:00, Thu., 10 Sep. 0.0450 0.0370 0.0409
01:01-02:00, Thu., 10 Sep. 0.0475 0.0418 0.0445
00:01-01:00, Thu., 10 Sep. 0.0457 0.0389 0.0421
23:01-24:00, Wed., 09 Sep. 0.0502 0.0405 0.0449
22:01-23:00, Wed., 09 Sep. 0.0527 0.0468 0.0498
21:01-22:00, Wed., 09 Sep. 0.0513 0.0414 0.0464
20:01-21:00, Wed., 09 Sep. 0.0475 0.0318 0.0381
19:01-20:00, Wed., 09 Sep. 0.0352 0.0304 0.0325
18:01-19:00, Wed., 09 Sep. 0.0361 0.0306 0.0328
17:01-18:00, Wed., 09 Sep. 0.0380 0.0317 0.0352
16:01-17:00, Wed., 09 Sep. 0.0400 0.0348 0.0372
15:01-16:00, Wed., 09 Sep. 0.0394 0.0297 0.0345
14:01-15:00, Wed., 09 Sep. 0.0342 0.0293 0.0314
13:01-14:00, Wed., 09 Sep. 0.0334 0.0290 0.0312
12:01-13:00, Wed., 09 Sep. 0.0335 0.0275 0.0311
11:01-12:00, Wed., 09 Sep. 0.0339 0.0292 0.0312
10:01-11:00, Wed., 09 Sep. 0.0338 0.0287 0.0312
09:01-10:00, Wed., 09 Sep. 0.0333 0.0297 0.0312
08:01-09:00, Wed., 09 Sep. 0.0336 0.0286 0.0311
07:01-08:00, Wed., 09 Sep. 0.0332 0.0297 0.0315
06:01-07:00, Wed., 09 Sep. 0.0347 0.0296 0.0319
05:01-06:00, Wed., 09 Sep. 0.0339 0.0285 0.0316
04:01-05:00, Wed., 09 Sep. 0.0338 0.0286 0.0313
03:01-04:00, Wed., 09 Sep. 0.0336 0.0286 0.0314
02:01-03:00, Wed., 09 Sep. 0.0349 0.0296 0.0321
01:01-02:00, Wed., 09 Sep. 0.0374 0.0314 0.0342
00:01-01:00, Wed., 09 Sep. 0.0400 0.0308 0.0367
23:01-24:00, Tue., 08 Sep. 0.0334 0.0290 0.0315
22:01-23:00, Tue., 08 Sep. 0.0339 0.0280 0.0313
21:01-22:00, Tue., 08 Sep. 0.0343 0.0296 0.0315
20:01-21:00, Tue., 08 Sep. 0.0334 0.0291 0.0311
19:01-20:00, Tue., 08 Sep. 0.0335 0.0292 0.0314
18:01-19:00, Tue., 08 Sep. 0.0341 0.0285 0.0311
17:01-18:00, Tue., 08 Sep. 0.0336 0.0295 0.0311
16:01-17:00, Tue., 08 Sep. 0.0336 0.0292 0.0315
15:01-16:00, Tue., 08 Sep. 0.0336 0.0286 0.0314
14:01-15:00, Tue., 08 Sep. 0.0340 0.0287 0.0311
13:01-14:00, Tue., 08 Sep. 0.0345 0.0297 0.0315
12:01-13:00, Tue., 08 Sep. 0.0339 0.0290 0.0316
11:01-12:00, Tue., 08 Sep. 0.0341 0.0290 0.0312
10:01-11:00, Tue., 08 Sep. 0.0336 0.0290 0.0310
09:01-10:00, Tue., 08 Sep. 0.0338 0.0290 0.0313
08:01-09:00, Tue., 08 Sep. 0.0343 0.0299 0.0315
07:01-08:00, Tue., 08 Sep. 0.0349 0.0287 0.0317
06:01-07:00, Tue., 08 Sep. 0.0370 0.0311 0.0341
05:01-06:00, Tue., 08 Sep. 0.0389 0.0320 0.0363
04:01-05:00, Tue., 08 Sep. 0.0369 0.0312 0.0339
03:01-04:00, Tue., 08 Sep. 0.0355 0.0308 0.0330
02:01-03:00, Tue., 08 Sep. 0.0338 0.0282 0.0314
01:01-02:00, Tue., 08 Sep. 0.0336 0.0280 0.0313
00:01-01:00, Tue., 08 Sep. 0.0333 0.0289 0.0312
23:01-24:00, Mon., 07 Sep. 0.0354 0.0290 0.0314
22:01-23:00, Mon., 07 Sep. 0.0331 0.0294 0.0314
21:01-22:00, Mon., 07 Sep. 0.0349 0.0296 0.0320
20:01-21:00, Mon., 07 Sep. 0.0360 0.0313 0.0334
19:01-20:00, Mon., 07 Sep. 0.0368 0.0310 0.0337
18:01-19:00, Mon., 07 Sep. 0.0385 0.0325 0.0356
17:01-18:00, Mon., 07 Sep. 0.0395 0.0322 0.0363
16:01-17:00, Mon., 07 Sep. 0.0418 0.0337 0.0377
15:01-16:00, Mon., 07 Sep. 0.0429 0.0365 0.0400
14:01-15:00, Mon., 07 Sep. 0.0429 0.0377 0.0402
13:01-14:00, Mon., 07 Sep. 0.0434 0.0363 0.0397
12:01-13:00, Mon., 07 Sep. 0.0387 0.0340 0.0363
11:01-12:00, Mon., 07 Sep. 0.0385 0.0326 0.0353
10:01-11:00, Mon., 07 Sep. 0.0387 0.0335 0.0360
09:01-10:00, Mon., 07 Sep. 0.0386 0.0301 0.0338
08:01-09:00, Mon., 07 Sep. 0.0375 0.0314 0.0338
07:01-08:00, Mon., 07 Sep. 0.0418 0.0342 0.0376
06:01-07:00, Mon., 07 Sep. 0.0437 0.0362 0.0404
05:01-06:00, Mon., 07 Sep. 0.0489 0.0410 0.0452
04:01-05:00, Mon., 07 Sep. 0.0474 0.0404 0.0438
03:01-04:00, Mon., 07 Sep. 0.0472 0.0388 0.0433
02:01-03:00, Mon., 07 Sep. 0.0436 0.0368 0.0401
01:01-02:00, Mon., 07 Sep. 0.0410 0.0354 0.0388
00:01-01:00, Mon., 07 Sep. 0.0423 0.0374 0.0400
23:01-24:00, Sun., 06 Sep. 0.0416 0.0376 0.0396
22:01-23:00, Sun., 06 Sep. 0.0419 0.0359 0.0391
21:01-22:00, Sun., 06 Sep. 0.0408 0.0346 0.0378
20:01-21:00, Sun., 06 Sep. 0.0384 0.0333 0.0358
19:01-20:00, Sun., 06 Sep. 0.0390 0.0341 0.0363
18:01-19:00, Sun., 06 Sep. 0.0412 0.0356 0.0380
17:01-18:00, Sun., 06 Sep. 0.0415 0.0373 0.0394
16:01-17:00, Sun., 06 Sep. 0.0429 0.0367 0.0396
15:01-16:00, Sun., 06 Sep. 0.0414 0.0344 0.0377
14:01-15:00, Sun., 06 Sep. 0.0407 0.0355 0.0377
13:01-14:00, Sun., 06 Sep. 0.0419 0.0361 0.0387
12:01-13:00, Sun., 06 Sep. 0.0429 0.0370 0.0397
11:01-12:00, Sun., 06 Sep. 0.0430 0.0374 0.0408
10:01-11:00, Sun., 06 Sep. 0.0420 0.0363 0.0388
09:01-10:00, Sun., 06 Sep. 0.0392 0.0329 0.0362
08:01-09:00, Sun., 06 Sep. 0.0369 0.0314 0.0341
07:01-08:00, Sun., 06 Sep. 0.0367 0.0311 0.0343
06:01-07:00, Sun., 06 Sep. 0.0391 0.0342 0.0363
05:01-06:00, Sun., 06 Sep. 0.0392 0.0332 0.0357
04:01-05:00, Sun., 06 Sep. 0.0360 0.0295 0.0328
03:01-04:00, Sun., 06 Sep. 0.0339 0.0296 0.0316
02:01-03:00, Sun., 06 Sep. 0.0339 0.0282 0.0312
01:01-02:00, Sun., 06 Sep. 0.0332 0.0291 0.0313
00:01-01:00, Sun., 06 Sep. 0.0335 0.0292 0.0312
23:01-24:00, Sat., 05 Sep. 0.0328 0.0295 0.0313
22:01-23:00, Sat., 05 Sep. 0.0339 0.0291 0.0313
21:01-22:00, Sat., 05 Sep. 0.0346 0.0285 0.0313
20:01-21:00, Sat., 05 Sep. 0.0340 0.0283 0.0313
19:01-20:00, Sat., 05 Sep. 0.0330 0.0293 0.0312
18:01-19:00, Sat., 05 Sep. 0.0338 0.0287 0.0313
17:01-18:00, Sat., 05 Sep. 0.0346 0.0294 0.0315
16:01-17:00, Sat., 05 Sep. 0.0343 0.0290 0.0316
15:01-16:00, Sat., 05 Sep. 0.0340 0.0293 0.0314
14:01-15:00, Sat., 05 Sep. 0.0337 0.0295 0.0317
13:01-14:00, Sat., 05 Sep. 0.0346 0.0292 0.0312
12:01-13:00, Sat., 05 Sep. 0.0345 0.0290 0.0315
11:01-12:00, Sat., 05 Sep. 0.0346 0.0288 0.0312
10:01-11:00, Sat., 05 Sep. 0.0334 0.0296 0.0313
09:01-10:00, Sat., 05 Sep. 0.0341 0.0293 0.0316
08:01-09:00, Sat., 05 Sep. 0.0360 0.0288 0.0325
07:01-08:00, Sat., 05 Sep. 0.0400 0.0323 0.0361
06:01-07:00, Sat., 05 Sep. 0.0467 0.0369 0.0420
05:01-06:00, Sat., 05 Sep. 0.0464 0.0356 0.0419
04:01-05:00, Sat., 05 Sep. 0.0397 0.0354 0.0374
03:01-04:00, Sat., 05 Sep. 0.0411 0.0349 0.0381
02:01-03:00, Sat., 05 Sep. 0.0411 0.0356 0.0387
01:01-02:00, Sat., 05 Sep. 0.0393 0.0330 0.0358
00:01-01:00, Sat., 05 Sep. 0.0367 0.0309 0.0339
23:01-24:00, Fri., 04 Sep. 0.0362 0.0299 0.0336
22:01-23:00, Fri., 04 Sep. 0.0369 0.0319 0.0343
21:01-22:00, Fri., 04 Sep. 0.0366 0.0312 0.0340
20:01-21:00, Fri., 04 Sep. 0.0364 0.0318 0.0344
19:01-20:00, Fri., 04 Sep. 0.0371 0.0311 0.0340
18:01-19:00, Fri., 04 Sep. 0.0370 0.0308 0.0332
17:01-18:00, Fri., 04 Sep. 0.0355 0.0301 0.0332
16:01-17:00, Fri., 04 Sep. 0.0365 0.0316 0.0335
15:01-16:00, Fri., 04 Sep. 0.0357 0.0312 0.0332
14:01-15:00, Fri., 04 Sep. 0.0356 0.0316 0.0336
13:01-14:00, Fri., 04 Sep. 0.0353 0.0303 0.0329
12:01-13:00, Fri., 04 Sep. 0.0356 0.0308 0.0329
11:01-12:00, Fri., 04 Sep. 0.0355 0.0310 0.0330
10:01-11:00, Fri., 04 Sep. 0.0356 0.0304 0.0329
09:01-10:00, Fri., 04 Sep. 0.0354 0.0312 0.0332
08:01-09:00, Fri., 04 Sep. 0.0349 0.0308 0.0328
07:01-08:00, Fri., 04 Sep. 0.0350 0.0307 0.0326
06:01-07:00, Fri., 04 Sep. 0.0358 0.0297 0.0326
05:01-06:00, Fri., 04 Sep. 0.0354 0.0302 0.0325
04:01-05:00, Fri., 04 Sep. 0.0358 0.0302 0.0324
03:01-04:00, Fri., 04 Sep. 0.0356 0.0308 0.0326
02:01-03:00, Fri., 04 Sep. 0.0351 0.0306 0.0327
01:01-02:00, Fri., 04 Sep. 0.0351 0.0304 0.0324
00:01-01:00, Fri., 04 Sep. 0.0342 0.0293 0.0324
23:01-24:00, Thu., 03 Sep. 0.0349 0.0293 0.0324
22:01-23:00, Thu., 03 Sep. 0.0351 0.0297 0.0324
21:01-22:00, Thu., 03 Sep. 0.0346 0.0298 0.0325
20:01-21:00, Thu., 03 Sep. 0.0347 0.0295 0.0322
19:01-20:00, Thu., 03 Sep. 0.0346 0.0291 0.0322
18:01-19:00, Thu., 03 Sep. 0.0342 0.0294 0.0321
17:01-18:00, Thu., 03 Sep. 0.0348 0.0298 0.0322
16:01-17:00, Thu., 03 Sep. 0.0352 0.0303 0.0323
15:01-16:00, Thu., 03 Sep. 0.0355 0.0300 0.0322
14:01-15:00, Thu., 03 Sep. 0.0344 0.0302 0.0323
13:01-14:00, Thu., 03 Sep. 0.0343 0.0301 0.0324
12:01-13:00, Thu., 03 Sep. 0.0345 0.0295 0.0322
11:01-12:00, Thu., 03 Sep. 0.0349 0.0299 0.0321
10:01-11:00, Thu., 03 Sep. 0.0347 0.0301 0.0321
09:01-10:00, Thu., 03 Sep. 0.0341 0.0298 0.0322
08:01-09:00, Thu., 03 Sep. 0.0356 0.0294 0.0321
07:01-08:00, Thu., 03 Sep. 0.0349 0.0291 0.0325
06:01-07:00, Thu., 03 Sep. 0.0346 0.0295 0.0325
05:01-06:00, Thu., 03 Sep. 0.0356 0.0304 0.0327
04:01-05:00, Thu., 03 Sep. 0.0343 0.0300 0.0322
03:01-04:00, Thu., 03 Sep. 0.0347 0.0304 0.0323
02:01-03:00, Thu., 03 Sep. 0.0356 0.0301 0.0322
01:01-02:00, Thu., 03 Sep. 0.0344 0.0295 0.0323
00:01-01:00, Thu., 03 Sep. 0.0350 0.0286 0.0319
23:01-24:00, Wed., 02 Sep. 0.0342 0.0293 0.0319
22:01-23:00, Wed., 02 Sep. 0.0342 0.0298 0.0321
21:01-22:00, Wed., 02 Sep. 0.0347 0.0295 0.0319
20:01-21:00, Wed., 02 Sep. 0.0347 0.0295 0.0322
19:01-20:00, Wed., 02 Sep. 0.0343 0.0293 0.0319
18:01-19:00, Wed., 02 Sep. 0.0340 0.0302 0.0321
17:01-18:00, Wed., 02 Sep. 0.0349 0.0296 0.0321
16:01-17:00, Wed., 02 Sep. 0.0343 0.0290 0.0320
15:01-16:00, Wed., 02 Sep. 0.0356 0.0306 0.0323
14:01-15:00, Wed., 02 Sep. 0.0353 0.0296 0.0322
13:01-14:00, Wed., 02 Sep. 0.0339 0.0290 0.0320
12:01-13:00, Wed., 02 Sep. 0.0346 0.0297 0.0321
11:01-12:00, Wed., 02 Sep. 0.0350 0.0300 0.0319
10:01-11:00, Wed., 02 Sep. 0.0350 0.0295 0.0320
09:01-10:00, Wed., 02 Sep. 0.0352 0.0291 0.0321
08:01-09:00, Wed., 02 Sep. 0.0347 0.0290 0.0320
07:01-08:00, Wed., 02 Sep. 0.0343 0.0294 0.0320
06:01-07:00, Wed., 02 Sep. 0.0349 0.0305 0.0320
05:01-06:00, Wed., 02 Sep. 0.0346 0.0297 0.0324
04:01-05:00, Wed., 02 Sep. 0.0339 0.0297 0.0320
03:01-04:00, Wed., 02 Sep. 0.0364 0.0302 0.0321
02:01-03:00, Wed., 02 Sep. 0.0344 0.0298 0.0321
01:01-02:00, Wed., 02 Sep. 0.0348 0.0299 0.0319
00:01-01:00, Wed., 02 Sep. 0.0342 0.0303 0.0323
23:01-24:00, Tue., 01 Sep. 0.0350 0.0296 0.0321
22:01-23:00, Tue., 01 Sep. 0.0349 0.0299 0.0321
21:01-22:00, Tue., 01 Sep. 0.0342 0.0292 0.0320
20:01-21:00, Tue., 01 Sep. 0.0343 0.0301 0.0323
19:01-20:00, Tue., 01 Sep. 0.0353 0.0297 0.0326
18:01-19:00, Tue., 01 Sep. 0.0338 0.0295 0.0320
17:01-18:00, Tue., 01 Sep. 0.0339 0.0300 0.0318
16:01-17:00, Tue., 01 Sep. 0.0348 0.0303 0.0321
15:01-16:00, Tue., 01 Sep. 0.0349 0.0292 0.0318
14:01-15:00, Tue., 01 Sep. 0.0347 0.0302 0.0322
13:01-14:00, Tue., 01 Sep. 0.0345 0.0295 0.0320
12:01-13:00, Tue., 01 Sep. 0.0343 0.0301 0.0321