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
19:01-20:00, Sat., 01 Aug. 0.0391 0.0332 0.0356
18:01-19:00, Sat., 01 Aug. 0.0352 0.0308 0.0332
17:01-18:00, Sat., 01 Aug. 0.0349 0.0308 0.0333
16:01-17:00, Sat., 01 Aug. 0.0356 0.0313 0.0333
15:01-16:00, Sat., 01 Aug. 0.0352 0.0304 0.0332
14:01-15:00, Sat., 01 Aug. 0.0357 0.0311 0.0331
13:01-14:00, Sat., 01 Aug. 0.0356 0.0309 0.0335
12:01-13:00, Sat., 01 Aug. 0.0364 0.0304 0.0334
11:01-12:00, Sat., 01 Aug. 0.0358 0.0313 0.0335
10:01-11:00, Sat., 01 Aug. 0.0356 0.0318 0.0335
09:01-10:00, Sat., 01 Aug. 0.0358 0.0313 0.0334
08:01-09:00, Sat., 01 Aug. 0.0360 0.0298 0.0333
07:01-08:00, Sat., 01 Aug. 0.0352 0.0303 0.0330
06:01-07:00, Sat., 01 Aug. 0.0365 0.0308 0.0335
05:01-06:00, Sat., 01 Aug. 0.0361 0.0313 0.0333
04:01-05:00, Sat., 01 Aug. 0.0365 0.0309 0.0332
03:01-04:00, Sat., 01 Aug. 0.0353 0.0307 0.0330
02:01-03:00, Sat., 01 Aug. 0.0360 0.0301 0.0330
01:01-02:00, Sat., 01 Aug. 0.0363 0.0305 0.0333
00:01-01:00, Sat., 01 Aug. 0.0354 0.0315 0.0336
23:01-24:00, Fri., 31 Jul. 0.0361 0.0311 0.0335
22:01-23:00, Fri., 31 Jul. 0.0362 0.0313 0.0336
21:01-22:00, Fri., 31 Jul. 0.0362 0.0304 0.0331
20:01-21:00, Fri., 31 Jul. 0.0359 0.0308 0.0334
19:01-20:00, Fri., 31 Jul. 0.0355 0.0315 0.0334
18:01-19:00, Fri., 31 Jul. 0.0350 0.0309 0.0331
17:01-18:00, Fri., 31 Jul. 0.0355 0.0312 0.0332
16:01-17:00, Fri., 31 Jul. 0.0363 0.0307 0.0333
15:01-16:00, Fri., 31 Jul. 0.0358 0.0307 0.0332
14:01-15:00, Fri., 31 Jul. 0.0353 0.0311 0.0332
13:01-14:00, Fri., 31 Jul. 0.0359 0.0312 0.0330
12:01-13:00, Fri., 31 Jul. 0.0357 0.0302 0.0331
11:01-12:00, Fri., 31 Jul. 0.0353 0.0310 0.0330
10:01-11:00, Fri., 31 Jul. 0.0353 0.0313 0.0332
09:01-10:00, Fri., 31 Jul. 0.0367 0.0303 0.0331
08:01-09:00, Fri., 31 Jul. 0.0355 0.0306 0.0329
07:01-08:00, Fri., 31 Jul. 0.0347 0.0310 0.0331
06:01-07:00, Fri., 31 Jul. 0.0359 0.0300 0.0331
05:01-06:00, Fri., 31 Jul. 0.0357 0.0310 0.0333
04:01-05:00, Fri., 31 Jul. 0.0352 0.0308 0.0329
03:01-04:00, Fri., 31 Jul. 0.0343 0.0309 0.0327
02:01-03:00, Fri., 31 Jul. 0.0348 0.0308 0.0330
01:01-02:00, Fri., 31 Jul. 0.0347 0.0308 0.0329
00:01-01:00, Fri., 31 Jul. 0.0367 0.0310 0.0332
23:01-24:00, Thu., 30 Jul. 0.0349 0.0310 0.0331
22:01-23:00, Thu., 30 Jul. 0.0362 0.0314 0.0335
21:01-22:00, Thu., 30 Jul. 0.0353 0.0307 0.0334
20:01-21:00, Thu., 30 Jul. 0.0379 0.0325 0.0344
19:01-20:00, Thu., 30 Jul. 0.0376 0.0311 0.0346
18:01-19:00, Thu., 30 Jul. 0.0366 0.0312 0.0333
17:01-18:00, Thu., 30 Jul. 0.0362 0.0309 0.0332
16:01-17:00, Thu., 30 Jul. 0.0351 0.0311 0.0334
15:01-16:00, Thu., 30 Jul. 0.0370 0.0310 0.0332
14:01-15:00, Thu., 30 Jul. 0.0351 0.0306 0.0329
13:01-14:00, Thu., 30 Jul. 0.0349 0.0307 0.0329
12:01-13:00, Thu., 30 Jul. 0.0351 0.0303 0.0331
11:01-12:00, Thu., 30 Jul. 0.0347 0.0304 0.0327
10:01-11:00, Thu., 30 Jul. 0.0346 0.0301 0.0328
09:01-10:00, Thu., 30 Jul. 0.0352 0.0301 0.0331
08:01-09:00, Thu., 30 Jul. 0.0363 0.0308 0.0334
07:01-08:00, Thu., 30 Jul. 0.0359 0.0307 0.0336
06:01-07:00, Thu., 30 Jul. 0.0357 0.0316 0.0336
05:01-06:00, Thu., 30 Jul. 0.0352 0.0315 0.0334
04:01-05:00, Thu., 30 Jul. 0.0352 0.0307 0.0333
03:01-04:00, Thu., 30 Jul. 0.0365 0.0308 0.0335
02:01-03:00, Thu., 30 Jul. 0.0349 0.0312 0.0332
01:01-02:00, Thu., 30 Jul. 0.0349 0.0304 0.0329
00:01-01:00, Thu., 30 Jul. 0.0349 0.0305 0.0326
23:01-24:00, Wed., 29 Jul. 0.0345 0.0304 0.0327
22:01-23:00, Wed., 29 Jul. 0.0351 0.0309 0.0326
21:01-22:00, Wed., 29 Jul. 0.0349 0.0304 0.0326
20:01-21:00, Wed., 29 Jul. 0.0352 0.0307 0.0324
19:01-20:00, Wed., 29 Jul. 0.0343 0.0307 0.0327
18:01-19:00, Wed., 29 Jul. 0.0356 0.0301 0.0325
17:01-18:00, Wed., 29 Jul. 0.0348 0.0307 0.0326
16:01-17:00, Wed., 29 Jul. 0.0353 0.0306 0.0329
15:01-16:00, Wed., 29 Jul. 0.0353 0.0311 0.0331
14:01-15:00, Wed., 29 Jul. 0.0354 0.0304 0.0332
13:01-14:00, Wed., 29 Jul. 0.0356 0.0301 0.0331
12:01-13:00, Wed., 29 Jul. 0.0354 0.0308 0.0329
11:01-12:00, Wed., 29 Jul. 0.0348 0.0300 0.0325
10:01-11:00, Wed., 29 Jul. 0.0341 0.0300 0.0324
09:01-10:00, Wed., 29 Jul. 0.0340 0.0296 0.0323
08:01-09:00, Wed., 29 Jul. 0.0349 0.0301 0.0323
07:01-08:00, Wed., 29 Jul. 0.0346 0.0303 0.0329
06:01-07:00, Wed., 29 Jul. 0.0360 0.0310 0.0328
05:01-06:00, Wed., 29 Jul. 0.0344 0.0296 0.0324
04:01-05:00, Wed., 29 Jul. 0.0349 0.0305 0.0327
03:01-04:00, Wed., 29 Jul. 0.0356 0.0303 0.0325
02:01-03:00, Wed., 29 Jul. 0.0356 0.0301 0.0324
01:01-02:00, Wed., 29 Jul. 0.0349 0.0301 0.0322
00:01-01:00, Wed., 29 Jul. 0.0353 0.0303 0.0323
23:01-24:00, Tue., 28 Jul. 0.0343 0.0303 0.0324
22:01-23:00, Tue., 28 Jul. 0.0343 0.0304 0.0323
21:01-22:00, Tue., 28 Jul. 0.0344 0.0301 0.0324
20:01-21:00, Tue., 28 Jul. 0.0348 0.0307 0.0325
19:01-20:00, Tue., 28 Jul. 0.0342 0.0304 0.0323
18:01-19:00, Tue., 28 Jul. 0.0356 0.0304 0.0330
17:01-18:00, Tue., 28 Jul. 0.0399 0.0325 0.0358
16:01-17:00, Tue., 28 Jul. 0.0515 0.0367 0.0437
15:01-16:00, Tue., 28 Jul. 0.0519 0.0347 0.0430
14:01-15:00, Tue., 28 Jul. 0.0358 0.0292 0.0320
13:01-14:00, Tue., 28 Jul. 0.0346 0.0293 0.0315
12:01-13:00, Tue., 28 Jul. 0.0337 0.0304 0.0319
11:01-12:00, Tue., 28 Jul. 0.0340 0.0285 0.0315
10:01-11:00, Tue., 28 Jul. 0.0333 0.0288 0.0312
09:01-10:00, Tue., 28 Jul. 0.0339 0.0285 0.0312
08:01-09:00, Tue., 28 Jul. 0.0335 0.0292 0.0316
07:01-08:00, Tue., 28 Jul. 0.0346 0.0297 0.0319
06:01-07:00, Tue., 28 Jul. 0.0349 0.0297 0.0319
05:01-06:00, Tue., 28 Jul. 0.0340 0.0297 0.0316
04:01-05:00, Tue., 28 Jul. 0.0339 0.0283 0.0316
03:01-04:00, Tue., 28 Jul. 0.0343 0.0297 0.0320
02:01-03:00, Tue., 28 Jul. 0.0347 0.0298 0.0319
01:01-02:00, Tue., 28 Jul. 0.0339 0.0299 0.0319
00:01-01:00, Tue., 28 Jul. 0.0347 0.0296 0.0319
23:01-24:00, Mon., 27 Jul. 0.0348 0.0301 0.0319
22:01-23:00, Mon., 27 Jul. 0.0335 0.0296 0.0318
21:01-22:00, Mon., 27 Jul. 0.0344 0.0294 0.0321
20:01-21:00, Mon., 27 Jul. 0.0352 0.0301 0.0325
19:01-20:00, Mon., 27 Jul. 0.0349 0.0302 0.0320
18:01-19:00, Mon., 27 Jul. 0.0333 0.0295 0.0316
17:01-18:00, Mon., 27 Jul. 0.0345 0.0300 0.0321
16:01-17:00, Mon., 27 Jul. 0.0349 0.0294 0.0321
15:01-16:00, Mon., 27 Jul. 0.0339 0.0296 0.0321
14:01-15:00, Mon., 27 Jul. 0.0340 0.0300 0.0321
13:01-14:00, Mon., 27 Jul. 0.0347 0.0297 0.0321
12:01-13:00, Mon., 27 Jul. 0.0347 0.0299 0.0318
11:01-12:00, Mon., 27 Jul. 0.0339 0.0296 0.0317
10:01-11:00, Mon., 27 Jul. 0.0346 0.0285 0.0320
09:01-10:00, Mon., 27 Jul. 0.0341 0.0299 0.0321
08:01-09:00, Mon., 27 Jul. 0.0339 0.0291 0.0320
07:01-08:00, Mon., 27 Jul. 0.0346 0.0291 0.0322
06:01-07:00, Mon., 27 Jul. 0.0339 0.0300 0.0319
05:01-06:00, Mon., 27 Jul. 0.0339 0.0301 0.0322
04:01-05:00, Mon., 27 Jul. 0.0339 0.0300 0.0320
03:01-04:00, Mon., 27 Jul. 0.0346 0.0289 0.0319
02:01-03:00, Mon., 27 Jul. 0.0337 0.0299 0.0321
01:01-02:00, Mon., 27 Jul. 0.0353 0.0294 0.0318
00:01-01:00, Mon., 27 Jul. 0.0343 0.0300 0.0321
23:01-24:00, Sun., 26 Jul. 0.0344 0.0294 0.0319
22:01-23:00, Sun., 26 Jul. 0.0344 0.0301 0.0320
21:01-22:00, Sun., 26 Jul. 0.0371 0.0313 0.0337
20:01-21:00, Sun., 26 Jul. 0.0415 0.0334 0.0375
19:01-20:00, Sun., 26 Jul. 0.0479 0.0402 0.0438
18:01-19:00, Sun., 26 Jul. 0.0420 0.0307 0.0350
17:01-18:00, Sun., 26 Jul. 0.0350 0.0305 0.0324
16:01-17:00, Sun., 26 Jul. 0.0380 0.0320 0.0344
15:01-16:00, Sun., 26 Jul. 0.0458 0.0345 0.0402
14:01-15:00, Sun., 26 Jul. 0.0507 0.0440 0.0471
13:01-14:00, Sun., 26 Jul. 0.0454 0.0320 0.0401
12:01-13:00, Sun., 26 Jul. 0.0361 0.0302 0.0330
11:01-12:00, Sun., 26 Jul. 0.0358 0.0306 0.0333
10:01-11:00, Sun., 26 Jul. 0.0354 0.0304 0.0330
09:01-10:00, Sun., 26 Jul. 0.0356 0.0313 0.0330
08:01-09:00, Sun., 26 Jul. 0.0350 0.0303 0.0327
07:01-08:00, Sun., 26 Jul. 0.0350 0.0306 0.0328
06:01-07:00, Sun., 26 Jul. 0.0352 0.0309 0.0328
05:01-06:00, Sun., 26 Jul. 0.0347 0.0296 0.0327
04:01-05:00, Sun., 26 Jul. 0.0347 0.0304 0.0325
03:01-04:00, Sun., 26 Jul. 0.0349 0.0301 0.0327
02:01-03:00, Sun., 26 Jul. 0.0372 0.0302 0.0327
01:01-02:00, Sun., 26 Jul. 0.0353 0.0302 0.0329
00:01-01:00, Sun., 26 Jul. 0.0354 0.0311 0.0330
23:01-24:00, Sat., 25 Jul. 0.0370 0.0314 0.0341
22:01-23:00, Sat., 25 Jul. 0.0382 0.0333 0.0360
21:01-22:00, Sat., 25 Jul. 0.0393 0.0349 0.0372
20:01-21:00, Sat., 25 Jul. 0.0405 0.0315 0.0355
19:01-20:00, Sat., 25 Jul. 0.0354 0.0316 0.0331
18:01-19:00, Sat., 25 Jul. 0.0352 0.0309 0.0330
17:01-18:00, Sat., 25 Jul. 0.0368 0.0315 0.0337
16:01-17:00, Sat., 25 Jul. 0.0377 0.0321 0.0346
15:01-16:00, Sat., 25 Jul. 0.0370 0.0303 0.0342
14:01-15:00, Sat., 25 Jul. 0.0360 0.0304 0.0332
13:01-14:00, Sat., 25 Jul. 0.0353 0.0315 0.0333
12:01-13:00, Sat., 25 Jul. 0.0360 0.0306 0.0331
11:01-12:00, Sat., 25 Jul. 0.0352 0.0304 0.0332
10:01-11:00, Sat., 25 Jul. 0.0366 0.0307 0.0328
09:01-10:00, Sat., 25 Jul. 0.0354 0.0311 0.0331
08:01-09:00, Sat., 25 Jul. 0.0352 0.0308 0.0330
07:01-08:00, Sat., 25 Jul. 0.0353 0.0313 0.0330
06:01-07:00, Sat., 25 Jul. 0.0351 0.0305 0.0329
05:01-06:00, Sat., 25 Jul. 0.0356 0.0310 0.0331
04:01-05:00, Sat., 25 Jul. 0.0360 0.0308 0.0329
03:01-04:00, Sat., 25 Jul. 0.0365 0.0306 0.0329
02:01-03:00, Sat., 25 Jul. 0.0352 0.0308 0.0333
01:01-02:00, Sat., 25 Jul. 0.0349 0.0302 0.0330
00:01-01:00, Sat., 25 Jul. 0.0351 0.0305 0.0329
23:01-24:00, Fri., 24 Jul. 0.0352 0.0307 0.0329
22:01-23:00, Fri., 24 Jul. 0.0360 0.0297 0.0330
21:01-22:00, Fri., 24 Jul. 0.0345 0.0304 0.0326
20:01-21:00, Fri., 24 Jul. 0.0353 0.0304 0.0329
19:01-20:00, Fri., 24 Jul. 0.0364 0.0301 0.0328
18:01-19:00, Fri., 24 Jul. 0.0339 0.0302 0.0326
17:01-18:00, Fri., 24 Jul. 0.0356 0.0299 0.0328
16:01-17:00, Fri., 24 Jul. 0.0352 0.0304 0.0326
15:01-16:00, Fri., 24 Jul. 0.0357 0.0301 0.0327
14:01-15:00, Fri., 24 Jul. 0.0346 0.0304 0.0328
13:01-14:00, Fri., 24 Jul. 0.0370 0.0310 0.0329
12:01-13:00, Fri., 24 Jul. 0.0356 0.0304 0.0329
11:01-12:00, Fri., 24 Jul. 0.0349 0.0307 0.0327
10:01-11:00, Fri., 24 Jul. 0.0342 0.0305 0.0326
09:01-10:00, Fri., 24 Jul. 0.0350 0.0308 0.0326
08:01-09:00, Fri., 24 Jul. 0.0356 0.0309 0.0330
07:01-08:00, Fri., 24 Jul. 0.0355 0.0308 0.0329
06:01-07:00, Fri., 24 Jul. 0.0346 0.0304 0.0329
05:01-06:00, Fri., 24 Jul. 0.0363 0.0309 0.0330
04:01-05:00, Fri., 24 Jul. 0.0353 0.0308 0.0331
03:01-04:00, Fri., 24 Jul. 0.0376 0.0313 0.0329
02:01-03:00, Fri., 24 Jul. 0.0361 0.0313 0.0332
01:01-02:00, Fri., 24 Jul. 0.0352 0.0307 0.0328
00:01-01:00, Fri., 24 Jul. 0.0362 0.0309 0.0332
23:01-24:00, Thu., 23 Jul. 0.0356 0.0304 0.0332
22:01-23:00, Thu., 23 Jul. 0.0353 0.0309 0.0331
21:01-22:00, Thu., 23 Jul. 0.0357 0.0314 0.0332
20:01-21:00, Thu., 23 Jul. 0.0356 0.0308 0.0332
19:01-20:00, Thu., 23 Jul. 0.0357 0.0304 0.0329
18:01-19:00, Thu., 23 Jul. 0.0363 0.0304 0.0330
17:01-18:00, Thu., 23 Jul. 0.0352 0.0306 0.0329
16:01-17:00, Thu., 23 Jul. 0.0350 0.0307 0.0329
15:01-16:00, Thu., 23 Jul. 0.0353 0.0310 0.0329
14:01-15:00, Thu., 23 Jul. 0.0353 0.0304 0.0332
13:01-14:00, Thu., 23 Jul. 0.0348 0.0307 0.0330
12:01-13:00, Thu., 23 Jul. 0.0366 0.0312 0.0333
11:01-12:00, Thu., 23 Jul. 0.0365 0.0312 0.0336
10:01-11:00, Thu., 23 Jul. 0.0357 0.0306 0.0335
09:01-10:00, Thu., 23 Jul. 0.0367 0.0305 0.0333
08:01-09:00, Thu., 23 Jul. 0.0351 0.0297 0.0326
07:01-08:00, Thu., 23 Jul. 0.0351 0.0310 0.0333
06:01-07:00, Thu., 23 Jul. 0.0359 0.0306 0.0331
05:01-06:00, Thu., 23 Jul. 0.0363 0.0305 0.0332
04:01-05:00, Thu., 23 Jul. 0.0354 0.0311 0.0332
03:01-04:00, Thu., 23 Jul. 0.0355 0.0318 0.0333
02:01-03:00, Thu., 23 Jul. 0.0354 0.0310 0.0332
01:01-02:00, Thu., 23 Jul. 0.0360 0.0313 0.0334
00:01-01:00, Thu., 23 Jul. 0.0365 0.0305 0.0333
23:01-24:00, Wed., 22 Jul. 0.0353 0.0317 0.0333
22:01-23:00, Wed., 22 Jul. 0.0366 0.0310 0.0332
21:01-22:00, Wed., 22 Jul. 0.0351 0.0306 0.0332
20:01-21:00, Wed., 22 Jul. 0.0357 0.0314 0.0337