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
07:01-08:00, Sat., 22 Aug. 0.0345 0.0294 0.0322
06:01-07:00, Sat., 22 Aug. 0.0342 0.0301 0.0318
05:01-06:00, Sat., 22 Aug. 0.0343 0.0292 0.0321
04:01-05:00, Sat., 22 Aug. 0.0345 0.0297 0.0320
03:01-04:00, Sat., 22 Aug. 0.0340 0.0302 0.0319
02:01-03:00, Sat., 22 Aug. 0.0341 0.0298 0.0319
01:01-02:00, Sat., 22 Aug. 0.0337 0.0294 0.0317
00:01-01:00, Sat., 22 Aug. 0.0343 0.0301 0.0321
23:01-24:00, Fri., 21 Aug. 0.0356 0.0311 0.0330
22:01-23:00, Fri., 21 Aug. 0.0395 0.0326 0.0355
21:01-22:00, Fri., 21 Aug. 0.0452 0.0373 0.0419
20:01-21:00, Fri., 21 Aug. 0.0459 0.0319 0.0403
19:01-20:00, Fri., 21 Aug. 0.0345 0.0294 0.0319
18:01-19:00, Fri., 21 Aug. 0.0341 0.0296 0.0317
17:01-18:00, Fri., 21 Aug. 0.0345 0.0301 0.0319
16:01-17:00, Fri., 21 Aug. 0.0339 0.0297 0.0319
15:01-16:00, Fri., 21 Aug. 0.0343 0.0294 0.0319
14:01-15:00, Fri., 21 Aug. 0.0348 0.0294 0.0321
13:01-14:00, Fri., 21 Aug. 0.0339 0.0290 0.0318
12:01-13:00, Fri., 21 Aug. 0.0346 0.0300 0.0320
11:01-12:00, Fri., 21 Aug. 0.0353 0.0297 0.0317
10:01-11:00, Fri., 21 Aug. 0.0336 0.0289 0.0316
09:01-10:00, Fri., 21 Aug. 0.0335 0.0297 0.0317
08:01-09:00, Fri., 21 Aug. 0.0343 0.0297 0.0320
07:01-08:00, Fri., 21 Aug. 0.0347 0.0297 0.0319
06:01-07:00, Fri., 21 Aug. 0.0344 0.0287 0.0318
05:01-06:00, Fri., 21 Aug. 0.0351 0.0297 0.0318
04:01-05:00, Fri., 21 Aug. 0.0339 0.0297 0.0318
03:01-04:00, Fri., 21 Aug. 0.0343 0.0293 0.0318
02:01-03:00, Fri., 21 Aug. 0.0339 0.0294 0.0317
01:01-02:00, Fri., 21 Aug. 0.0345 0.0282 0.0318
00:01-01:00, Fri., 21 Aug. 0.0335 0.0287 0.0317
23:01-24:00, Thu., 20 Aug. 0.0341 0.0298 0.0318
22:01-23:00, Thu., 20 Aug. 0.0342 0.0299 0.0319
21:01-22:00, Thu., 20 Aug. 0.0339 0.0291 0.0316
20:01-21:00, Thu., 20 Aug. 0.0334 0.0296 0.0316
19:01-20:00, Thu., 20 Aug. 0.0343 0.0298 0.0317
18:01-19:00, Thu., 20 Aug. 0.0340 0.0292 0.0318
17:01-18:00, Thu., 20 Aug. 0.0348 0.0296 0.0319
16:01-17:00, Thu., 20 Aug. 0.0345 0.0294 0.0317
15:01-16:00, Thu., 20 Aug. 0.0340 0.0299 0.0318
14:01-15:00, Thu., 20 Aug. 0.0344 0.0287 0.0319
13:01-14:00, Thu., 20 Aug. 0.0339 0.0295 0.0317
12:01-13:00, Thu., 20 Aug. 0.0336 0.0294 0.0318
11:01-12:00, Thu., 20 Aug. 0.0349 0.0292 0.0318
10:01-11:00, Thu., 20 Aug. 0.0342 0.0301 0.0320
09:01-10:00, Thu., 20 Aug. 0.0341 0.0288 0.0314
08:01-09:00, Thu., 20 Aug. 0.0336 0.0296 0.0316
07:01-08:00, Thu., 20 Aug. 0.0342 0.0297 0.0318
06:01-07:00, Thu., 20 Aug. 0.0336 0.0298 0.0318
05:01-06:00, Thu., 20 Aug. 0.0345 0.0295 0.0320
04:01-05:00, Thu., 20 Aug. 0.0352 0.0297 0.0319
03:01-04:00, Thu., 20 Aug. 0.0339 0.0296 0.0317
02:01-03:00, Thu., 20 Aug. 0.0335 0.0300 0.0316
01:01-02:00, Thu., 20 Aug. 0.0336 0.0291 0.0317
00:01-01:00, Thu., 20 Aug. 0.0336 0.0292 0.0317
23:01-24:00, Wed., 19 Aug. 0.0343 0.0297 0.0318
22:01-23:00, Wed., 19 Aug. 0.0336 0.0295 0.0316
21:01-22:00, Wed., 19 Aug. 0.0342 0.0297 0.0318
20:01-21:00, Wed., 19 Aug. 0.0338 0.0288 0.0317
19:01-20:00, Wed., 19 Aug. 0.0339 0.0301 0.0317
18:01-19:00, Wed., 19 Aug. 0.0330 0.0297 0.0316
17:01-18:00, Wed., 19 Aug. 0.0342 0.0294 0.0317
16:01-17:00, Wed., 19 Aug. 0.0336 0.0294 0.0318
15:01-16:00, Wed., 19 Aug. 0.0342 0.0293 0.0316
14:01-15:00, Wed., 19 Aug. 0.0334 0.0287 0.0314
13:01-14:00, Wed., 19 Aug. 0.0346 0.0294 0.0315
12:01-13:00, Wed., 19 Aug. 0.0339 0.0295 0.0316
11:01-12:00, Wed., 19 Aug. 0.0349 0.0286 0.0317
10:01-11:00, Wed., 19 Aug. 0.0335 0.0296 0.0316
09:01-10:00, Wed., 19 Aug. 0.0347 0.0286 0.0315
08:01-09:00, Wed., 19 Aug. 0.0341 0.0291 0.0315
07:01-08:00, Wed., 19 Aug. 0.0344 0.0295 0.0317
06:01-07:00, Wed., 19 Aug. 0.0332 0.0295 0.0315
05:01-06:00, Wed., 19 Aug. 0.0337 0.0296 0.0315
04:01-05:00, Wed., 19 Aug. 0.0340 0.0293 0.0314
03:01-04:00, Wed., 19 Aug. 0.0346 0.0297 0.0315
02:01-03:00, Wed., 19 Aug. 0.0338 0.0289 0.0315
01:01-02:00, Wed., 19 Aug. 0.0346 0.0290 0.0312
00:01-01:00, Wed., 19 Aug. 0.0348 0.0294 0.0315
23:01-24:00, Tue., 18 Aug. 0.0349 0.0292 0.0317
22:01-23:00, Tue., 18 Aug. 0.0336 0.0291 0.0315
21:01-22:00, Tue., 18 Aug. 0.0339 0.0289 0.0314
20:01-21:00, Tue., 18 Aug. 0.0333 0.0291 0.0313
19:01-20:00, Tue., 18 Aug. 0.0341 0.0287 0.0315
18:01-19:00, Tue., 18 Aug. 0.0340 0.0297 0.0317
17:01-18:00, Tue., 18 Aug. 0.0336 0.0288 0.0313
16:01-17:00, Tue., 18 Aug. 0.0338 0.0293 0.0315
15:01-16:00, Tue., 18 Aug. 0.0346 0.0294 0.0316
14:01-15:00, Tue., 18 Aug. 0.0335 0.0283 0.0312
13:01-14:00, Tue., 18 Aug. 0.0336 0.0269 0.0314
12:01-13:00, Tue., 18 Aug. 0.0342 0.0292 0.0317
11:01-12:00, Tue., 18 Aug. 0.0336 0.0287 0.0313
10:01-11:00, Tue., 18 Aug. 0.0338 0.0288 0.0314
09:01-10:00, Tue., 18 Aug. 0.0346 0.0290 0.0315
08:01-09:00, Tue., 18 Aug. 0.0342 0.0290 0.0314
07:01-08:00, Tue., 18 Aug. 0.0336 0.0299 0.0317
06:01-07:00, Tue., 18 Aug. 0.0346 0.0292 0.0315
05:01-06:00, Tue., 18 Aug. 0.0349 0.0283 0.0314
04:01-05:00, Tue., 18 Aug. 0.0333 0.0296 0.0313
03:01-04:00, Tue., 18 Aug. 0.0346 0.0281 0.0314
02:01-03:00, Tue., 18 Aug. 0.0336 0.0283 0.0312
01:01-02:00, Tue., 18 Aug. 0.0336 0.0293 0.0313
00:01-01:00, Tue., 18 Aug. 0.0339 0.0296 0.0314
23:01-24:00, Mon., 17 Aug. 0.0332 0.0290 0.0311
22:01-23:00, Mon., 17 Aug. 0.0342 0.0286 0.0313
21:01-22:00, Mon., 17 Aug. 0.0339 0.0290 0.0313
20:01-21:00, Mon., 17 Aug. 0.0334 0.0294 0.0313
19:01-20:00, Mon., 17 Aug. 0.0339 0.0288 0.0313
18:01-19:00, Mon., 17 Aug. 0.0339 0.0291 0.0313
17:01-18:00, Mon., 17 Aug. 0.0343 0.0289 0.0314
16:01-17:00, Mon., 17 Aug. 0.0331 0.0297 0.0312
15:01-16:00, Mon., 17 Aug. 0.0343 0.0294 0.0313
14:01-15:00, Mon., 17 Aug. 0.0332 0.0286 0.0312
13:01-14:00, Mon., 17 Aug. 0.0326 0.0288 0.0312
12:01-13:00, Mon., 17 Aug. 0.0332 0.0286 0.0312
11:01-12:00, Mon., 17 Aug. 0.0329 0.0278 0.0311
10:01-11:00, Mon., 17 Aug. 0.0331 0.0291 0.0312
09:01-10:00, Mon., 17 Aug. 0.0338 0.0278 0.0314
08:01-09:00, Mon., 17 Aug. 0.0333 0.0278 0.0312
07:01-08:00, Mon., 17 Aug. 0.0336 0.0280 0.0314
06:01-07:00, Mon., 17 Aug. 0.0341 0.0291 0.0313
05:01-06:00, Mon., 17 Aug. 0.0339 0.0294 0.0314
04:01-05:00, Mon., 17 Aug. 0.0342 0.0292 0.0312
03:01-04:00, Mon., 17 Aug. 0.0331 0.0291 0.0312
02:01-03:00, Mon., 17 Aug. 0.0339 0.0292 0.0310
01:01-02:00, Mon., 17 Aug. 0.0330 0.0288 0.0310
00:01-01:00, Mon., 17 Aug. 0.0336 0.0279 0.0309
23:01-24:00, Sun., 16 Aug. 0.0330 0.0282 0.0312
22:01-23:00, Sun., 16 Aug. 0.0333 0.0285 0.0309
21:01-22:00, Sun., 16 Aug. 0.0346 0.0292 0.0313
20:01-21:00, Sun., 16 Aug. 0.0343 0.0289 0.0312
19:01-20:00, Sun., 16 Aug. 0.0337 0.0290 0.0312
18:01-19:00, Sun., 16 Aug. 0.0340 0.0282 0.0310
17:01-18:00, Sun., 16 Aug. 0.0329 0.0291 0.0313
16:01-17:00, Sun., 16 Aug. 0.0333 0.0293 0.0313
15:01-16:00, Sun., 16 Aug. 0.0334 0.0283 0.0315
14:01-15:00, Sun., 16 Aug. 0.0339 0.0300 0.0322
13:01-14:00, Sun., 16 Aug. 0.0352 0.0308 0.0332
12:01-13:00, Sun., 16 Aug. 0.0356 0.0294 0.0324
11:01-12:00, Sun., 16 Aug. 0.0345 0.0290 0.0313
10:01-11:00, Sun., 16 Aug. 0.0342 0.0298 0.0317
09:01-10:00, Sun., 16 Aug. 0.0341 0.0294 0.0316
08:01-09:00, Sun., 16 Aug. 0.0342 0.0289 0.0314
07:01-08:00, Sun., 16 Aug. 0.0341 0.0295 0.0319
06:01-07:00, Sun., 16 Aug. 0.0340 0.0288 0.0313
05:01-06:00, Sun., 16 Aug. 0.0333 0.0288 0.0312
04:01-05:00, Sun., 16 Aug. 0.0330 0.0289 0.0313
03:01-04:00, Sun., 16 Aug. 0.0342 0.0291 0.0313
02:01-03:00, Sun., 16 Aug. 0.0332 0.0294 0.0313
01:01-02:00, Sun., 16 Aug. 0.0331 0.0287 0.0314
00:01-01:00, Sun., 16 Aug. 0.0343 0.0293 0.0312
23:01-24:00, Sat., 15 Aug. 0.0338 0.0285 0.0313
22:01-23:00, Sat., 15 Aug. 0.0339 0.0290 0.0312
21:01-22:00, Sat., 15 Aug. 0.0337 0.0293 0.0312
20:01-21:00, Sat., 15 Aug. 0.0332 0.0292 0.0310
19:01-20:00, Sat., 15 Aug. 0.0333 0.0290 0.0312
18:01-19:00, Sat., 15 Aug. 0.0332 0.0277 0.0311
17:01-18:00, Sat., 15 Aug. 0.0344 0.0290 0.0314
16:01-17:00, Sat., 15 Aug. 0.0336 0.0290 0.0314
15:01-16:00, Sat., 15 Aug. 0.0341 0.0293 0.0312
14:01-15:00, Sat., 15 Aug. 0.0341 0.0298 0.0317
13:01-14:00, Sat., 15 Aug. 0.0345 0.0294 0.0314
12:01-13:00, Sat., 15 Aug. 0.0336 0.0297 0.0314
11:01-12:00, Sat., 15 Aug. 0.0333 0.0292 0.0314
10:01-11:00, Sat., 15 Aug. 0.0336 0.0290 0.0313
09:01-10:00, Sat., 15 Aug. 0.0336 0.0281 0.0312
08:01-09:00, Sat., 15 Aug. 0.0337 0.0291 0.0311
07:01-08:00, Sat., 15 Aug. 0.0332 0.0295 0.0314
06:01-07:00, Sat., 15 Aug. 0.0338 0.0290 0.0313
05:01-06:00, Sat., 15 Aug. 0.0339 0.0288 0.0311
04:01-05:00, Sat., 15 Aug. 0.0333 0.0294 0.0313
03:01-04:00, Sat., 15 Aug. 0.0334 0.0284 0.0313
02:01-03:00, Sat., 15 Aug. 0.0346 0.0288 0.0312
01:01-02:00, Sat., 15 Aug. 0.0330 0.0288 0.0314
00:01-01:00, Sat., 15 Aug. 0.0337 0.0295 0.0313
23:01-24:00, Fri., 14 Aug. 0.0341 0.0290 0.0311
22:01-23:00, Fri., 14 Aug. 0.0336 0.0288 0.0311
21:01-22:00, Fri., 14 Aug. 0.0332 0.0291 0.0310
20:01-21:00, Fri., 14 Aug. 0.0342 0.0297 0.0312
19:01-20:00, Fri., 14 Aug. 0.0335 0.0294 0.0312
18:01-19:00, Fri., 14 Aug. 0.0332 0.0287 0.0311
17:01-18:00, Fri., 14 Aug. 0.0336 0.0291 0.0313
16:01-17:00, Fri., 14 Aug. 0.0342 0.0284 0.0313
15:01-16:00, Fri., 14 Aug. 0.0343 0.0294 0.0312
14:01-15:00, Fri., 14 Aug. 0.0329 0.0287 0.0312
13:01-14:00, Fri., 14 Aug. 0.0331 0.0295 0.0314
12:01-13:00, Fri., 14 Aug. 0.0336 0.0290 0.0311
11:01-12:00, Fri., 14 Aug. 0.0334 0.0289 0.0312
10:01-11:00, Fri., 14 Aug. 0.0337 0.0292 0.0312
09:01-10:00, Fri., 14 Aug. 0.0339 0.0294 0.0315
08:01-09:00, Fri., 14 Aug. 0.0339 0.0289 0.0313
07:01-08:00, Fri., 14 Aug. 0.0326 0.0293 0.0311
06:01-07:00, Fri., 14 Aug. 0.0338 0.0301 0.0316
05:01-06:00, Fri., 14 Aug. 0.0361 0.0296 0.0324
04:01-05:00, Fri., 14 Aug. 0.0363 0.0310 0.0332
03:01-04:00, Fri., 14 Aug. 0.0367 0.0314 0.0340
02:01-03:00, Fri., 14 Aug. 0.0366 0.0309 0.0342
01:01-02:00, Fri., 14 Aug. 0.0373 0.0323 0.0352
00:01-01:00, Fri., 14 Aug. 0.0375 0.0325 0.0350
23:01-24:00, Thu., 13 Aug. 0.0365 0.0323 0.0345
22:01-23:00, Thu., 13 Aug. 0.0358 0.0318 0.0338
21:01-22:00, Thu., 13 Aug. 0.0362 0.0317 0.0338
20:01-21:00, Thu., 13 Aug. 0.0367 0.0318 0.0340
19:01-20:00, Thu., 13 Aug. 0.0356 0.0313 0.0332
18:01-19:00, Thu., 13 Aug. 0.0349 0.0299 0.0324
17:01-18:00, Thu., 13 Aug. 0.0340 0.0295 0.0314
16:01-17:00, Thu., 13 Aug. 0.0330 0.0285 0.0310
15:01-16:00, Thu., 13 Aug. 0.0336 0.0291 0.0314
14:01-15:00, Thu., 13 Aug. 0.0336 0.0282 0.0312
13:01-14:00, Thu., 13 Aug. 0.0339 0.0294 0.0314
12:01-13:00, Thu., 13 Aug. 0.0331 0.0287 0.0314
11:01-12:00, Thu., 13 Aug. 0.0357 0.0294 0.0319
10:01-11:00, Thu., 13 Aug. 0.0332 0.0291 0.0314
09:01-10:00, Thu., 13 Aug. 0.0343 0.0297 0.0315
08:01-09:00, Thu., 13 Aug. 0.0354 0.0291 0.0316
07:01-08:00, Thu., 13 Aug. 0.0339 0.0298 0.0317
06:01-07:00, Thu., 13 Aug. 0.0344 0.0303 0.0320
05:01-06:00, Thu., 13 Aug. 0.0353 0.0289 0.0316
04:01-05:00, Thu., 13 Aug. 0.0343 0.0277 0.0314
03:01-04:00, Thu., 13 Aug. 0.0337 0.0296 0.0313
02:01-03:00, Thu., 13 Aug. 0.0336 0.0296 0.0314
01:01-02:00, Thu., 13 Aug. 0.0337 0.0293 0.0313
00:01-01:00, Thu., 13 Aug. 0.0335 0.0281 0.0311
23:01-24:00, Wed., 12 Aug. 0.0335 0.0291 0.0310
22:01-23:00, Wed., 12 Aug. 0.0336 0.0290 0.0312
21:01-22:00, Wed., 12 Aug. 0.0346 0.0300 0.0321
20:01-21:00, Wed., 12 Aug. 0.0375 0.0307 0.0340
19:01-20:00, Wed., 12 Aug. 0.0384 0.0325 0.0355
18:01-19:00, Wed., 12 Aug. 0.0352 0.0304 0.0333
17:01-18:00, Wed., 12 Aug. 0.0370 0.0301 0.0331
16:01-17:00, Wed., 12 Aug. 0.0371 0.0322 0.0342
15:01-16:00, Wed., 12 Aug. 0.0369 0.0298 0.0337
14:01-15:00, Wed., 12 Aug. 0.0343 0.0300 0.0318
13:01-14:00, Wed., 12 Aug. 0.0347 0.0293 0.0320
12:01-13:00, Wed., 12 Aug. 0.0352 0.0301 0.0330
11:01-12:00, Wed., 12 Aug. 0.0354 0.0300 0.0321
10:01-11:00, Wed., 12 Aug. 0.0337 0.0302 0.0316
09:01-10:00, Wed., 12 Aug. 0.0343 0.0294 0.0319
08:01-09:00, Wed., 12 Aug. 0.0347 0.0296 0.0322