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
03:01-04:00, Thu., 15 Jan. 0.0341 0.0292 0.0320
02:01-03:00, Thu., 15 Jan. 0.0346 0.0301 0.0318
01:01-02:00, Thu., 15 Jan. 0.0336 0.0288 0.0310
00:01-01:00, Thu., 15 Jan. 0.0345 0.0289 0.0315
23:01-24:00, Wed., 14 Jan. 0.0332 0.0290 0.0313
22:01-23:00, Wed., 14 Jan. 0.0333 0.0290 0.0311
21:01-22:00, Wed., 14 Jan. 0.0345 0.0290 0.0317
20:01-21:00, Wed., 14 Jan. 0.0337 0.0288 0.0316
19:01-20:00, Wed., 14 Jan. 0.0342 0.0290 0.0317
18:01-19:00, Wed., 14 Jan. 0.0341 0.0292 0.0315
17:01-18:00, Wed., 14 Jan. 0.0344 0.0286 0.0315
16:01-17:00, Wed., 14 Jan. 0.0345 0.0291 0.0319
15:01-16:00, Wed., 14 Jan. 0.0349 0.0288 0.0319
14:01-15:00, Wed., 14 Jan. 0.0343 0.0288 0.0317
13:01-14:00, Wed., 14 Jan. 0.0350 0.0301 0.0319
12:01-13:00, Wed., 14 Jan. 0.0353 0.0282 0.0318
11:01-12:00, Wed., 14 Jan. 0.0342 0.0294 0.0320
10:01-11:00, Wed., 14 Jan. 0.0341 0.0301 0.0318
09:01-10:00, Wed., 14 Jan. 0.0335 0.0294 0.0315
08:01-09:00, Wed., 14 Jan. 0.0343 0.0292 0.0320
07:01-08:00, Wed., 14 Jan. 0.0343 0.0298 0.0320
06:01-07:00, Wed., 14 Jan. 0.0343 0.0298 0.0320
05:01-06:00, Wed., 14 Jan. 0.0353 0.0297 0.0321
04:01-05:00, Wed., 14 Jan. 0.0343 0.0293 0.0319
03:01-04:00, Wed., 14 Jan. 0.0351 0.0300 0.0321
02:01-03:00, Wed., 14 Jan. 0.0347 0.0288 0.0317
01:01-02:00, Wed., 14 Jan. 0.0348 0.0301 0.0319
00:01-01:00, Wed., 14 Jan. 0.0336 0.0290 0.0317
23:01-24:00, Tue., 13 Jan. 0.0339 0.0286 0.0315
22:01-23:00, Tue., 13 Jan. 0.0350 0.0294 0.0316
21:01-22:00, Tue., 13 Jan. 0.0354 0.0297 0.0318
20:01-21:00, Tue., 13 Jan. 0.0346 0.0296 0.0318
19:01-20:00, Tue., 13 Jan. 0.0344 0.0303 0.0323
18:01-19:00, Tue., 13 Jan. 0.0347 0.0299 0.0320
17:01-18:00, Tue., 13 Jan. 0.0350 0.0300 0.0321
16:01-17:00, Tue., 13 Jan. 0.0359 0.0308 0.0328
15:01-16:00, Tue., 13 Jan. 0.0347 0.0305 0.0325
14:01-15:00, Tue., 13 Jan. 0.0346 0.0304 0.0325
13:01-14:00, Tue., 13 Jan. 0.0356 0.0300 0.0327
12:01-13:00, Tue., 13 Jan. 0.0354 0.0294 0.0324
11:01-12:00, Tue., 13 Jan. 0.0346 0.0304 0.0326
10:01-11:00, Tue., 13 Jan. 0.0353 0.0307 0.0324
09:01-10:00, Tue., 13 Jan. 0.0343 0.0304 0.0321
08:01-09:00, Tue., 13 Jan. 0.0347 0.0301 0.0323
07:01-08:00, Tue., 13 Jan. 0.0349 0.0299 0.0323
06:01-07:00, Tue., 13 Jan. 0.0345 0.0294 0.0321
05:01-06:00, Tue., 13 Jan. 0.0345 0.0308 0.0323
04:01-05:00, Tue., 13 Jan. 0.0346 0.0301 0.0323
03:01-04:00, Tue., 13 Jan. 0.0349 0.0294 0.0318
02:01-03:00, Tue., 13 Jan. 0.0349 0.0304 0.0322
01:01-02:00, Tue., 13 Jan. 0.0344 0.0291 0.0322
00:01-01:00, Tue., 13 Jan. 0.0341 0.0302 0.0318
23:01-24:00, Mon., 12 Jan. 0.0346 0.0301 0.0319
22:01-23:00, Mon., 12 Jan. 0.0346 0.0294 0.0321
21:01-22:00, Mon., 12 Jan. 0.0344 0.0299 0.0320
20:01-21:00, Mon., 12 Jan. 0.0337 0.0290 0.0319
19:01-20:00, Mon., 12 Jan. 0.0342 0.0297 0.0318
18:01-19:00, Mon., 12 Jan. 0.0349 0.0296 0.0319
17:01-18:00, Mon., 12 Jan. 0.0343 0.0294 0.0318
16:01-17:00, Mon., 12 Jan. 0.0337 0.0296 0.0317
15:01-16:00, Mon., 12 Jan. 0.0334 0.0296 0.0318
14:01-15:00, Mon., 12 Jan. 0.0338 0.0294 0.0320
13:01-14:00, Mon., 12 Jan. 0.0332 0.0294 0.0316
12:01-13:00, Mon., 12 Jan. 0.0341 0.0299 0.0319
11:01-12:00, Mon., 12 Jan. 0.0336 0.0286 0.0318
10:01-11:00, Mon., 12 Jan. 0.0349 0.0299 0.0320
09:01-10:00, Mon., 12 Jan. 0.0341 0.0304 0.0318
08:01-09:00, Mon., 12 Jan. 0.0336 0.0292 0.0315
07:01-08:00, Mon., 12 Jan. 0.0343 0.0292 0.0316
06:01-07:00, Mon., 12 Jan. 0.0335 0.0297 0.0317
05:01-06:00, Mon., 12 Jan. 0.0343 0.0297 0.0317
04:01-05:00, Mon., 12 Jan. 0.0336 0.0294 0.0315
03:01-04:00, Mon., 12 Jan. 0.0336 0.0295 0.0316
02:01-03:00, Mon., 12 Jan. 0.0339 0.0290 0.0315
01:01-02:00, Mon., 12 Jan. 0.0336 0.0295 0.0316
00:01-01:00, Mon., 12 Jan. 0.0340 0.0296 0.0316
23:01-24:00, Sun., 11 Jan. 0.0347 0.0296 0.0318
22:01-23:00, Sun., 11 Jan. 0.0338 0.0296 0.0314
21:01-22:00, Sun., 11 Jan. 0.0339 0.0297 0.0315
20:01-21:00, Sun., 11 Jan. 0.0339 0.0290 0.0314
19:01-20:00, Sun., 11 Jan. 0.0349 0.0294 0.0317
18:01-19:00, Sun., 11 Jan. 0.0341 0.0295 0.0319
17:01-18:00, Sun., 11 Jan. 0.0342 0.0297 0.0320
16:01-17:00, Sun., 11 Jan. 0.0346 0.0301 0.0320
15:01-16:00, Sun., 11 Jan. 0.0346 0.0292 0.0320
14:01-15:00, Sun., 11 Jan. 0.0346 0.0294 0.0320
13:01-14:00, Sun., 11 Jan. 0.0343 0.0306 0.0323
12:01-13:00, Sun., 11 Jan. 0.0347 0.0299 0.0325
11:01-12:00, Sun., 11 Jan. 0.0353 0.0306 0.0324
10:01-11:00, Sun., 11 Jan. 0.0344 0.0304 0.0323
09:01-10:00, Sun., 11 Jan. 0.0344 0.0302 0.0327
08:01-09:00, Sun., 11 Jan. 0.0350 0.0300 0.0322
07:01-08:00, Sun., 11 Jan. 0.0356 0.0304 0.0325
06:01-07:00, Sun., 11 Jan. 0.0349 0.0298 0.0324
05:01-06:00, Sun., 11 Jan. 0.0339 0.0304 0.0322
04:01-05:00, Sun., 11 Jan. 0.0342 0.0298 0.0321
03:01-04:00, Sun., 11 Jan. 0.0348 0.0299 0.0318
02:01-03:00, Sun., 11 Jan. 0.0337 0.0294 0.0320
01:01-02:00, Sun., 11 Jan. 0.0345 0.0297 0.0321
00:01-01:00, Sun., 11 Jan. 0.0343 0.0298 0.0317
23:01-24:00, Sat., 10 Jan. 0.0335 0.0298 0.0318
22:01-23:00, Sat., 10 Jan. 0.0333 0.0293 0.0314
21:01-22:00, Sat., 10 Jan. 0.0342 0.0294 0.0315
20:01-21:00, Sat., 10 Jan. 0.0339 0.0292 0.0317
19:01-20:00, Sat., 10 Jan. 0.0333 0.0297 0.0315
18:01-19:00, Sat., 10 Jan. 0.0329 0.0290 0.0312
17:01-18:00, Sat., 10 Jan. 0.0336 0.0286 0.0314
16:01-17:00, Sat., 10 Jan. 0.0349 0.0290 0.0316
15:01-16:00, Sat., 10 Jan. 0.0343 0.0294 0.0316
14:01-15:00, Sat., 10 Jan. 0.0337 0.0291 0.0316
13:01-14:00, Sat., 10 Jan. 0.0342 0.0295 0.0316
12:01-13:00, Sat., 10 Jan. 0.0336 0.0291 0.0314
11:01-12:00, Sat., 10 Jan. 0.0342 0.0289 0.0317
10:01-11:00, Sat., 10 Jan. 0.0340 0.0304 0.0321
09:01-10:00, Sat., 10 Jan. 0.0348 0.0304 0.0325
08:01-09:00, Sat., 10 Jan. 0.0341 0.0296 0.0320
07:01-08:00, Sat., 10 Jan. 0.0344 0.0304 0.0322
06:01-07:00, Sat., 10 Jan. 0.0350 0.0295 0.0320
05:01-06:00, Sat., 10 Jan. 0.0345 0.0301 0.0325
04:01-05:00, Sat., 10 Jan. 0.0344 0.0302 0.0324
03:01-04:00, Sat., 10 Jan. 0.0345 0.0298 0.0323
02:01-03:00, Sat., 10 Jan. 0.0359 0.0298 0.0329
01:01-02:00, Sat., 10 Jan. 0.0367 0.0319 0.0344
00:01-01:00, Sat., 10 Jan. 0.0387 0.0329 0.0361
23:01-24:00, Fri., 09 Jan. 0.0377 0.0327 0.0354
22:01-23:00, Fri., 09 Jan. 0.0396 0.0318 0.0357
21:01-22:00, Fri., 09 Jan. 0.0409 0.0321 0.0372
20:01-21:00, Fri., 09 Jan. 0.0342 0.0292 0.0318
19:01-20:00, Fri., 09 Jan. 0.0353 0.0291 0.0320
18:01-19:00, Fri., 09 Jan. 0.0342 0.0297 0.0318
17:01-18:00, Fri., 09 Jan. 0.0339 0.0293 0.0318
16:01-17:00, Fri., 09 Jan. 0.0342 0.0294 0.0317
15:01-16:00, Fri., 09 Jan. 0.0336 0.0290 0.0314
14:01-15:00, Fri., 09 Jan. 0.0349 0.0295 0.0317
13:01-14:00, Fri., 09 Jan. 0.0336 0.0287 0.0316
12:01-13:00, Fri., 09 Jan. 0.0343 0.0289 0.0313
11:01-12:00, Fri., 09 Jan. 0.0331 0.0294 0.0316
10:01-11:00, Fri., 09 Jan. 0.0339 0.0294 0.0314
09:01-10:00, Fri., 09 Jan. 0.0334 0.0292 0.0314
08:01-09:00, Fri., 09 Jan. 0.0338 0.0292 0.0313
07:01-08:00, Fri., 09 Jan. 0.0343 0.0282 0.0317
06:01-07:00, Fri., 09 Jan. 0.0334 0.0287 0.0317
05:01-06:00, Fri., 09 Jan. 0.0339 0.0293 0.0318
04:01-05:00, Fri., 09 Jan. 0.0345 0.0294 0.0318
03:01-04:00, Fri., 09 Jan. 0.0353 0.0300 0.0319
02:01-03:00, Fri., 09 Jan. 0.0343 0.0297 0.0321
01:01-02:00, Fri., 09 Jan. 0.0349 0.0300 0.0320
00:01-01:00, Fri., 09 Jan. 0.0339 0.0300 0.0322
23:01-24:00, Thu., 08 Jan. 0.0343 0.0297 0.0322
22:01-23:00, Thu., 08 Jan. 0.0351 0.0300 0.0324
21:01-22:00, Thu., 08 Jan. 0.0351 0.0302 0.0324
20:01-21:00, Thu., 08 Jan. 0.0346 0.0299 0.0321
19:01-20:00, Thu., 08 Jan. 0.0349 0.0301 0.0322
18:01-19:00, Thu., 08 Jan. 0.0346 0.0311 0.0328
17:01-18:00, Thu., 08 Jan. 0.0352 0.0304 0.0327
16:01-17:00, Thu., 08 Jan. 0.0346 0.0296 0.0325
15:01-16:00, Thu., 08 Jan. 0.0354 0.0305 0.0329
14:01-15:00, Thu., 08 Jan. 0.0349 0.0307 0.0330
13:01-14:00, Thu., 08 Jan. 0.0347 0.0311 0.0331
12:01-13:00, Thu., 08 Jan. 0.0353 0.0304 0.0327
11:01-12:00, Thu., 08 Jan. 0.0345 0.0304 0.0326
10:01-11:00, Thu., 08 Jan. 0.0363 0.0311 0.0334
09:01-10:00, Thu., 08 Jan. 0.0353 0.0310 0.0331
08:01-09:00, Thu., 08 Jan. 0.0357 0.0305 0.0329
07:01-08:00, Thu., 08 Jan. 0.0351 0.0308 0.0325
06:01-07:00, Thu., 08 Jan. 0.0345 0.0292 0.0326
05:01-06:00, Thu., 08 Jan. 0.0347 0.0302 0.0324
04:01-05:00, Thu., 08 Jan. 0.0346 0.0290 0.0323
03:01-04:00, Thu., 08 Jan. 0.0343 0.0307 0.0324
02:01-03:00, Thu., 08 Jan. 0.0344 0.0303 0.0324
01:01-02:00, Thu., 08 Jan. 0.0340 0.0297 0.0320
00:01-01:00, Thu., 08 Jan. 0.0343 0.0292 0.0322
23:01-24:00, Wed., 07 Jan. 0.0336 0.0299 0.0315
22:01-23:00, Wed., 07 Jan. 0.0343 0.0286 0.0313
21:01-22:00, Wed., 07 Jan. 0.0334 0.0300 0.0316
20:01-21:00, Wed., 07 Jan. 0.0335 0.0294 0.0316
19:01-20:00, Wed., 07 Jan. 0.0342 0.0290 0.0313
18:01-19:00, Wed., 07 Jan. 0.0343 0.0295 0.0318
17:01-18:00, Wed., 07 Jan. 0.0343 0.0297 0.0319
16:01-17:00, Wed., 07 Jan. 0.0341 0.0291 0.0316
15:01-16:00, Wed., 07 Jan. 0.0340 0.0292 0.0314
14:01-15:00, Wed., 07 Jan. 0.0336 0.0297 0.0316
13:01-14:00, Wed., 07 Jan. 0.0343 0.0287 0.0317
12:01-13:00, Wed., 07 Jan. 0.0337 0.0294 0.0318
11:01-12:00, Wed., 07 Jan. 0.0349 0.0299 0.0322
10:01-11:00, Wed., 07 Jan. 0.0354 0.0301 0.0326
09:01-10:00, Wed., 07 Jan. 0.0338 0.0293 0.0317
08:01-09:00, Wed., 07 Jan. 0.0333 0.0295 0.0315
07:01-08:00, Wed., 07 Jan. 0.0353 0.0302 0.0323
06:01-07:00, Wed., 07 Jan. 0.0346 0.0305 0.0326
05:01-06:00, Wed., 07 Jan. 0.0347 0.0297 0.0324
04:01-05:00, Wed., 07 Jan. 0.0352 0.0300 0.0326
03:01-04:00, Wed., 07 Jan. 0.0338 0.0301 0.0318
02:01-03:00, Wed., 07 Jan. 0.0346 0.0289 0.0315
01:01-02:00, Wed., 07 Jan. 0.0331 0.0295 0.0314
00:01-01:00, Wed., 07 Jan. 0.0339 0.0288 0.0315
23:01-24:00, Tue., 06 Jan. 0.0338 0.0294 0.0316
22:01-23:00, Tue., 06 Jan. 0.0334 0.0294 0.0312
21:01-22:00, Tue., 06 Jan. 0.0338 0.0294 0.0310
20:01-21:00, Tue., 06 Jan. 0.0335 0.0291 0.0314
19:01-20:00, Tue., 06 Jan. 0.0340 0.0285 0.0315
18:01-19:00, Tue., 06 Jan. 0.0336 0.0290 0.0313
17:01-18:00, Tue., 06 Jan. 0.0337 0.0290 0.0314
16:01-17:00, Tue., 06 Jan. 0.0341 0.0292 0.0316
15:01-16:00, Tue., 06 Jan. 0.0338 0.0293 0.0318
14:01-15:00, Tue., 06 Jan. 0.0336 0.0290 0.0317
13:01-14:00, Tue., 06 Jan. 0.0332 0.0292 0.0317
12:01-13:00, Tue., 06 Jan. 0.0334 0.0294 0.0316
11:01-12:00, Tue., 06 Jan. 0.0352 0.0297 0.0318
10:01-11:00, Tue., 06 Jan. 0.0330 0.0287 0.0313
09:01-10:00, Tue., 06 Jan. 0.0342 0.0294 0.0315
08:01-09:00, Tue., 06 Jan. 0.0329 0.0290 0.0309
07:01-08:00, Tue., 06 Jan. 0.0341 0.0284 0.0313
06:01-07:00, Tue., 06 Jan. 0.0338 0.0294 0.0317
05:01-06:00, Tue., 06 Jan. 0.0332 0.0295 0.0317
04:01-05:00, Tue., 06 Jan. 0.0353 0.0299 0.0326
03:01-04:00, Tue., 06 Jan. 0.0344 0.0304 0.0324
02:01-03:00, Tue., 06 Jan. 0.0349 0.0289 0.0322
01:01-02:00, Tue., 06 Jan. 0.0349 0.0292 0.0320
00:01-01:00, Tue., 06 Jan. 0.0344 0.0298 0.0320
23:01-24:00, Mon., 05 Jan. 0.0342 0.0293 0.0316
22:01-23:00, Mon., 05 Jan. 0.0341 0.0285 0.0320
21:01-22:00, Mon., 05 Jan. 0.0337 0.0304 0.0322
20:01-21:00, Mon., 05 Jan. 0.0351 0.0301 0.0324
19:01-20:00, Mon., 05 Jan. 0.0349 0.0280 0.0324
18:01-19:00, Mon., 05 Jan. 0.0347 0.0296 0.0320
17:01-18:00, Mon., 05 Jan. 0.0349 0.0291 0.0316
16:01-17:00, Mon., 05 Jan. 0.0339 0.0294 0.0316
15:01-16:00, Mon., 05 Jan. 0.0342 0.0292 0.0318
14:01-15:00, Mon., 05 Jan. 0.0343 0.0295 0.0317
13:01-14:00, Mon., 05 Jan. 0.0349 0.0296 0.0317
12:01-13:00, Mon., 05 Jan. 0.0343 0.0306 0.0321
11:01-12:00, Mon., 05 Jan. 0.0350 0.0308 0.0324
10:01-11:00, Mon., 05 Jan. 0.0350 0.0304 0.0327
09:01-10:00, Mon., 05 Jan. 0.0355 0.0299 0.0327
08:01-09:00, Mon., 05 Jan. 0.0364 0.0304 0.0330
07:01-08:00, Mon., 05 Jan. 0.0349 0.0306 0.0329
06:01-07:00, Mon., 05 Jan. 0.0359 0.0304 0.0330
05:01-06:00, Mon., 05 Jan. 0.0355 0.0311 0.0330
04:01-05:00, Mon., 05 Jan. 0.0347 0.0308 0.0327