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
04:01-05:00, Mon., 22 Jun. 0.0334 0.0288 0.0314
03:01-04:00, Mon., 22 Jun. 0.0341 0.0283 0.0313
02:01-03:00, Mon., 22 Jun. 0.0337 0.0296 0.0313
01:01-02:00, Mon., 22 Jun. 0.0333 0.0288 0.0314
00:01-01:00, Mon., 22 Jun. 0.0339 0.0297 0.0318
23:01-24:00, Sun., 21 Jun. 0.0338 0.0292 0.0316
22:01-23:00, Sun., 21 Jun. 0.0336 0.0281 0.0315
21:01-22:00, Sun., 21 Jun. 0.0339 0.0293 0.0312
20:01-21:00, Sun., 21 Jun. 0.0338 0.0297 0.0315
19:01-20:00, Sun., 21 Jun. 0.0324 0.0295 0.0311
18:01-19:00, Sun., 21 Jun. 0.0336 0.0295 0.0316
17:01-18:00, Sun., 21 Jun. 0.0333 0.0291 0.0313
16:01-17:00, Sun., 21 Jun. 0.0332 0.0286 0.0311
15:01-16:00, Sun., 21 Jun. 0.0340 0.0297 0.0316
14:01-15:00, Sun., 21 Jun. 0.0339 0.0293 0.0313
13:01-14:00, Sun., 21 Jun. 0.0343 0.0291 0.0314
12:01-13:00, Sun., 21 Jun. 0.0349 0.0297 0.0318
11:01-12:00, Sun., 21 Jun. 0.0332 0.0287 0.0315
10:01-11:00, Sun., 21 Jun. 0.0332 0.0290 0.0312
09:01-10:00, Sun., 21 Jun. 0.0330 0.0290 0.0310
08:01-09:00, Sun., 21 Jun. 0.0336 0.0295 0.0314
07:01-08:00, Sun., 21 Jun. 0.0345 0.0302 0.0321
06:01-07:00, Sun., 21 Jun. 0.0367 0.0310 0.0339
05:01-06:00, Sun., 21 Jun. 0.0455 0.0343 0.0401
04:01-05:00, Sun., 21 Jun. 0.0492 0.0433 0.0463
03:01-04:00, Sun., 21 Jun. 0.0464 0.0341 0.0390
02:01-03:00, Sun., 21 Jun. 0.0395 0.0338 0.0370
01:01-02:00, Sun., 21 Jun. 0.0379 0.0335 0.0357
00:01-01:00, Sun., 21 Jun. 0.0389 0.0336 0.0363
23:01-24:00, Sat., 20 Jun. 0.0380 0.0319 0.0346
22:01-23:00, Sat., 20 Jun. 0.0415 0.0355 0.0379
21:01-22:00, Sat., 20 Jun. 0.0485 0.0397 0.0438
20:01-21:00, Sat., 20 Jun. 0.0471 0.0387 0.0435
19:01-20:00, Sat., 20 Jun. 0.0415 0.0370 0.0397
18:01-19:00, Sat., 20 Jun. 0.0408 0.0348 0.0376
17:01-18:00, Sat., 20 Jun. 0.0383 0.0327 0.0351
16:01-17:00, Sat., 20 Jun. 0.0363 0.0304 0.0330
15:01-16:00, Sat., 20 Jun. 0.0366 0.0317 0.0334
14:01-15:00, Sat., 20 Jun. 0.0386 0.0325 0.0356
13:01-14:00, Sat., 20 Jun. 0.0388 0.0332 0.0357
12:01-13:00, Sat., 20 Jun. 0.0356 0.0303 0.0331
11:01-12:00, Sat., 20 Jun. 0.0342 0.0295 0.0318
10:01-11:00, Sat., 20 Jun. 0.0336 0.0287 0.0312
09:01-10:00, Sat., 20 Jun. 0.0339 0.0290 0.0313
08:01-09:00, Sat., 20 Jun. 0.0343 0.0291 0.0313
07:01-08:00, Sat., 20 Jun. 0.0339 0.0293 0.0315
06:01-07:00, Sat., 20 Jun. 0.0340 0.0296 0.0315
05:01-06:00, Sat., 20 Jun. 0.0343 0.0292 0.0313
04:01-05:00, Sat., 20 Jun. 0.0337 0.0293 0.0314
03:01-04:00, Sat., 20 Jun. 0.0344 0.0290 0.0313
02:01-03:00, Sat., 20 Jun. 0.0336 0.0288 0.0315
01:01-02:00, Sat., 20 Jun. 0.0336 0.0294 0.0315
00:01-01:00, Sat., 20 Jun. 0.0340 0.0288 0.0311
23:01-24:00, Fri., 19 Jun. 0.0339 0.0286 0.0315
22:01-23:00, Fri., 19 Jun. 0.0335 0.0294 0.0312
21:01-22:00, Fri., 19 Jun. 0.0356 0.0292 0.0312
20:01-21:00, Fri., 19 Jun. 0.0339 0.0296 0.0313
19:01-20:00, Fri., 19 Jun. 0.0336 0.0294 0.0312
18:01-19:00, Fri., 19 Jun. 0.0339 0.0301 0.0318
17:01-18:00, Fri., 19 Jun. 0.0339 0.0296 0.0318
16:01-17:00, Fri., 19 Jun. 0.0332 0.0287 0.0314
15:01-16:00, Fri., 19 Jun. 0.0337 0.0290 0.0315
14:01-15:00, Fri., 19 Jun. 0.0342 0.0291 0.0313
13:01-14:00, Fri., 19 Jun. 0.0340 0.0287 0.0316
12:01-13:00, Fri., 19 Jun. 0.0329 0.0288 0.0311
11:01-12:00, Fri., 19 Jun. 0.0339 0.0287 0.0313
10:01-11:00, Fri., 19 Jun. 0.0343 0.0286 0.0313
09:01-10:00, Fri., 19 Jun. 0.0335 0.0289 0.0313
08:01-09:00, Fri., 19 Jun. 0.0334 0.0294 0.0312
07:01-08:00, Fri., 19 Jun. 0.0335 0.0290 0.0311
06:01-07:00, Fri., 19 Jun. 0.0336 0.0294 0.0314
05:01-06:00, Fri., 19 Jun. 0.0334 0.0281 0.0311
04:01-05:00, Fri., 19 Jun. 0.0340 0.0288 0.0311
03:01-04:00, Fri., 19 Jun. 0.0329 0.0290 0.0309
02:01-03:00, Fri., 19 Jun. 0.0336 0.0279 0.0311
01:01-02:00, Fri., 19 Jun. 0.0330 0.0278 0.0309
00:01-01:00, Fri., 19 Jun. 0.0332 0.0292 0.0309
23:01-24:00, Thu., 18 Jun. 0.0326 0.0293 0.0311
22:01-23:00, Thu., 18 Jun. 0.0341 0.0294 0.0310
21:01-22:00, Thu., 18 Jun. 0.0332 0.0288 0.0308
20:01-21:00, Thu., 18 Jun. 0.0334 0.0288 0.0309
19:01-20:00, Thu., 18 Jun. 0.0333 0.0285 0.0307
18:01-19:00, Thu., 18 Jun. 0.0340 0.0292 0.0313
17:01-18:00, Thu., 18 Jun. 0.0337 0.0287 0.0307
16:01-17:00, Thu., 18 Jun. 0.0333 0.0285 0.0311
15:01-16:00, Thu., 18 Jun. 0.0332 0.0287 0.0309
14:01-15:00, Thu., 18 Jun. 0.0329 0.0283 0.0309
13:01-14:00, Thu., 18 Jun. 0.0333 0.0297 0.0311
12:01-13:00, Thu., 18 Jun. 0.0327 0.0286 0.0310
11:01-12:00, Thu., 18 Jun. 0.0333 0.0284 0.0311
10:01-11:00, Thu., 18 Jun. 0.0339 0.0279 0.0310
09:01-10:00, Thu., 18 Jun. 0.0346 0.0300 0.0319
08:01-09:00, Thu., 18 Jun. 0.0351 0.0305 0.0330
07:01-08:00, Thu., 18 Jun. 0.0385 0.0332 0.0353
06:01-07:00, Thu., 18 Jun. 0.0393 0.0353 0.0374
05:01-06:00, Thu., 18 Jun. 0.0390 0.0334 0.0362
04:01-05:00, Thu., 18 Jun. 0.0386 0.0331 0.0359
03:01-04:00, Thu., 18 Jun. 0.0389 0.0342 0.0361
02:01-03:00, Thu., 18 Jun. 0.0379 0.0319 0.0347
01:01-02:00, Thu., 18 Jun. 0.0363 0.0316 0.0338
00:01-01:00, Thu., 18 Jun. 0.0364 0.0326 0.0342
23:01-24:00, Wed., 17 Jun. 0.0353 0.0308 0.0332
22:01-23:00, Wed., 17 Jun. 0.0343 0.0290 0.0319
21:01-22:00, Wed., 17 Jun. 0.0332 0.0295 0.0311
20:01-21:00, Wed., 17 Jun. 0.0349 0.0285 0.0313
19:01-20:00, Wed., 17 Jun. 0.0340 0.0293 0.0312
18:01-19:00, Wed., 17 Jun. 0.0336 0.0287 0.0310
17:01-18:00, Wed., 17 Jun. 0.0339 0.0283 0.0315
16:01-17:00, Wed., 17 Jun. 0.0337 0.0296 0.0315
15:01-16:00, Wed., 17 Jun. 0.0337 0.0293 0.0314
14:01-15:00, Wed., 17 Jun. 0.0332 0.0294 0.0313
13:01-14:00, Wed., 17 Jun. 0.0340 0.0280 0.0314
12:01-13:00, Wed., 17 Jun. 0.0341 0.0292 0.0315
11:01-12:00, Wed., 17 Jun. 0.0336 0.0290 0.0315
10:01-11:00, Wed., 17 Jun. 0.0339 0.0288 0.0312
09:01-10:00, Wed., 17 Jun. 0.0331 0.0285 0.0312
08:01-09:00, Wed., 17 Jun. 0.0336 0.0294 0.0312
07:01-08:00, Wed., 17 Jun. 0.0336 0.0294 0.0315
06:01-07:00, Wed., 17 Jun. 0.0349 0.0300 0.0317
05:01-06:00, Wed., 17 Jun. 0.0341 0.0295 0.0315
04:01-05:00, Wed., 17 Jun. 0.0335 0.0293 0.0313
03:01-04:00, Wed., 17 Jun. 0.0335 0.0287 0.0314
02:01-03:00, Wed., 17 Jun. 0.0343 0.0288 0.0314
01:01-02:00, Wed., 17 Jun. 0.0330 0.0282 0.0313
00:01-01:00, Wed., 17 Jun. 0.0336 0.0295 0.0314
23:01-24:00, Tue., 16 Jun. 0.0339 0.0294 0.0313
22:01-23:00, Tue., 16 Jun. 0.0343 0.0285 0.0313
21:01-22:00, Tue., 16 Jun. 0.0331 0.0295 0.0311
20:01-21:00, Tue., 16 Jun. 0.0332 0.0292 0.0312
19:01-20:00, Tue., 16 Jun. 0.0336 0.0290 0.0313
18:01-19:00, Tue., 16 Jun. 0.0338 0.0291 0.0312
17:01-18:00, Tue., 16 Jun. 0.0341 0.0290 0.0314
16:01-17:00, Tue., 16 Jun. 0.0327 0.0295 0.0312
15:01-16:00, Tue., 16 Jun. 0.0336 0.0294 0.0312
14:01-15:00, Tue., 16 Jun. 0.0334 0.0293 0.0314
13:01-14:00, Tue., 16 Jun. 0.0329 0.0291 0.0314
12:01-13:00, Tue., 16 Jun. 0.0336 0.0294 0.0313
11:01-12:00, Tue., 16 Jun. 0.0339 0.0289 0.0316
10:01-11:00, Tue., 16 Jun. 0.0339 0.0289 0.0313
09:01-10:00, Tue., 16 Jun. 0.0339 0.0286 0.0312
08:01-09:00, Tue., 16 Jun. 0.0339 0.0280 0.0312
07:01-08:00, Tue., 16 Jun. 0.0338 0.0294 0.0319
06:01-07:00, Tue., 16 Jun. 0.0339 0.0290 0.0319
05:01-06:00, Tue., 16 Jun. 0.0338 0.0292 0.0315
04:01-05:00, Tue., 16 Jun. 0.0336 0.0294 0.0312
03:01-04:00, Tue., 16 Jun. 0.0342 0.0290 0.0311
02:01-03:00, Tue., 16 Jun. 0.0331 0.0285 0.0311
01:01-02:00, Tue., 16 Jun. 0.0327 0.0291 0.0309
00:01-01:00, Tue., 16 Jun. 0.0336 0.0285 0.0309
23:01-24:00, Mon., 15 Jun. 0.0333 0.0289 0.0310
22:01-23:00, Mon., 15 Jun. 0.0339 0.0292 0.0310
21:01-22:00, Mon., 15 Jun. 0.0332 0.0287 0.0308
20:01-21:00, Mon., 15 Jun. 0.0330 0.0285 0.0310
19:01-20:00, Mon., 15 Jun. 0.0333 0.0283 0.0310
18:01-19:00, Mon., 15 Jun. 0.0334 0.0288 0.0312
17:01-18:00, Mon., 15 Jun. 0.0328 0.0290 0.0311
16:01-17:00, Mon., 15 Jun. 0.0336 0.0281 0.0311
15:01-16:00, Mon., 15 Jun. 0.0336 0.0292 0.0310
14:01-15:00, Mon., 15 Jun. 0.0343 0.0292 0.0313
13:01-14:00, Mon., 15 Jun. 0.0334 0.0294 0.0314
12:01-13:00, Mon., 15 Jun. 0.0336 0.0294 0.0315
11:01-12:00, Mon., 15 Jun. 0.0333 0.0293 0.0314
10:01-11:00, Mon., 15 Jun. 0.0339 0.0291 0.0316
09:01-10:00, Mon., 15 Jun. 0.0355 0.0300 0.0329
08:01-09:00, Mon., 15 Jun. 0.0384 0.0330 0.0357
07:01-08:00, Mon., 15 Jun. 0.0428 0.0372 0.0400
06:01-07:00, Mon., 15 Jun. 0.0425 0.0391 0.0406
05:01-06:00, Mon., 15 Jun. 0.0434 0.0380 0.0411
04:01-05:00, Mon., 15 Jun. 0.0425 0.0373 0.0407
03:01-04:00, Mon., 15 Jun. 0.0426 0.0370 0.0395
02:01-03:00, Mon., 15 Jun. 0.0396 0.0336 0.0375
01:01-02:00, Mon., 15 Jun. 0.0377 0.0334 0.0357
00:01-01:00, Mon., 15 Jun. 0.0380 0.0320 0.0349
23:01-24:00, Sun., 14 Jun. 0.0349 0.0304 0.0322
22:01-23:00, Sun., 14 Jun. 0.0336 0.0296 0.0320
21:01-22:00, Sun., 14 Jun. 0.0337 0.0295 0.0314
20:01-21:00, Sun., 14 Jun. 0.0345 0.0296 0.0316
19:01-20:00, Sun., 14 Jun. 0.0348 0.0291 0.0317
18:01-19:00, Sun., 14 Jun. 0.0338 0.0296 0.0315
17:01-18:00, Sun., 14 Jun. 0.0348 0.0296 0.0317
16:01-17:00, Sun., 14 Jun. 0.0338 0.0294 0.0315
15:01-16:00, Sun., 14 Jun. 0.0334 0.0296 0.0318
14:01-15:00, Sun., 14 Jun. 0.0339 0.0297 0.0318
13:01-14:00, Sun., 14 Jun. 0.0341 0.0298 0.0317
12:01-13:00, Sun., 14 Jun. 0.0336 0.0295 0.0315
11:01-12:00, Sun., 14 Jun. 0.0334 0.0294 0.0316
10:01-11:00, Sun., 14 Jun. 0.0336 0.0299 0.0319
09:01-10:00, Sun., 14 Jun. 0.0356 0.0290 0.0318
08:01-09:00, Sun., 14 Jun. 0.0346 0.0303 0.0321
07:01-08:00, Sun., 14 Jun. 0.0348 0.0299 0.0323
06:01-07:00, Sun., 14 Jun. 0.0346 0.0300 0.0322
05:01-06:00, Sun., 14 Jun. 0.0343 0.0306 0.0325
04:01-05:00, Sun., 14 Jun. 0.0342 0.0300 0.0324
03:01-04:00, Sun., 14 Jun. 0.0351 0.0304 0.0325
02:01-03:00, Sun., 14 Jun. 0.0346 0.0297 0.0323
01:01-02:00, Sun., 14 Jun. 0.0349 0.0292 0.0320
00:01-01:00, Sun., 14 Jun. 0.0339 0.0290 0.0318
23:01-24:00, Sat., 13 Jun. 0.0337 0.0297 0.0317
22:01-23:00, Sat., 13 Jun. 0.0340 0.0294 0.0317
21:01-22:00, Sat., 13 Jun. 0.0343 0.0297 0.0318
20:01-21:00, Sat., 13 Jun. 0.0343 0.0295 0.0316
19:01-20:00, Sat., 13 Jun. 0.0341 0.0288 0.0316
18:01-19:00, Sat., 13 Jun. 0.0347 0.0292 0.0315
17:01-18:00, Sat., 13 Jun. 0.0343 0.0292 0.0315
16:01-17:00, Sat., 13 Jun. 0.0342 0.0292 0.0317
15:01-16:00, Sat., 13 Jun. 0.0340 0.0286 0.0320
14:01-15:00, Sat., 13 Jun. 0.0349 0.0295 0.0319
13:01-14:00, Sat., 13 Jun. 0.0340 0.0289 0.0317
12:01-13:00, Sat., 13 Jun. 0.0338 0.0298 0.0320
11:01-12:00, Sat., 13 Jun. 0.0340 0.0300 0.0319
10:01-11:00, Sat., 13 Jun. 0.0346 0.0297 0.0318
09:01-10:00, Sat., 13 Jun. 0.0348 0.0299 0.0320
08:01-09:00, Sat., 13 Jun. 0.0343 0.0298 0.0322
07:01-08:00, Sat., 13 Jun. 0.0336 0.0294 0.0317
06:01-07:00, Sat., 13 Jun. 0.0344 0.0295 0.0318
05:01-06:00, Sat., 13 Jun. 0.0340 0.0302 0.0320
04:01-05:00, Sat., 13 Jun. 0.0340 0.0297 0.0318
03:01-04:00, Sat., 13 Jun. 0.0357 0.0300 0.0319
02:01-03:00, Sat., 13 Jun. 0.0351 0.0297 0.0317
01:01-02:00, Sat., 13 Jun. 0.0343 0.0294 0.0321
00:01-01:00, Sat., 13 Jun. 0.0341 0.0294 0.0317
23:01-24:00, Fri., 12 Jun. 0.0340 0.0301 0.0316
22:01-23:00, Fri., 12 Jun. 0.0348 0.0294 0.0317
21:01-22:00, Fri., 12 Jun. 0.0336 0.0295 0.0317
20:01-21:00, Fri., 12 Jun. 0.0339 0.0287 0.0318
19:01-20:00, Fri., 12 Jun. 0.0335 0.0291 0.0318
18:01-19:00, Fri., 12 Jun. 0.0333 0.0300 0.0319
17:01-18:00, Fri., 12 Jun. 0.0346 0.0297 0.0320
16:01-17:00, Fri., 12 Jun. 0.0361 0.0304 0.0334
15:01-16:00, Fri., 12 Jun. 0.0402 0.0318 0.0368
14:01-15:00, Fri., 12 Jun. 0.0398 0.0331 0.0360
13:01-14:00, Fri., 12 Jun. 0.0345 0.0298 0.0318
12:01-13:00, Fri., 12 Jun. 0.0335 0.0295 0.0316
11:01-12:00, Fri., 12 Jun. 0.0348 0.0292 0.0316
10:01-11:00, Fri., 12 Jun. 0.0335 0.0294 0.0317
09:01-10:00, Fri., 12 Jun. 0.0336 0.0297 0.0320
08:01-09:00, Fri., 12 Jun. 0.0349 0.0297 0.0320
07:01-08:00, Fri., 12 Jun. 0.0349 0.0287 0.0320
06:01-07:00, Fri., 12 Jun. 0.0343 0.0294 0.0320
05:01-06:00, Fri., 12 Jun. 0.0349 0.0300 0.0318