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
15:01-16:00, Sat., 17 Oct. 0.0356 0.0312 0.0328
14:01-15:00, Sat., 17 Oct. 0.0343 0.0296 0.0325
13:01-14:00, Sat., 17 Oct. 0.0346 0.0303 0.0325
12:01-13:00, Sat., 17 Oct. 0.0364 0.0297 0.0328
11:01-12:00, Sat., 17 Oct. 0.0352 0.0298 0.0330
10:01-11:00, Sat., 17 Oct. 0.0348 0.0300 0.0327
09:01-10:00, Sat., 17 Oct. 0.0349 0.0309 0.0328
08:01-09:00, Sat., 17 Oct. 0.0352 0.0297 0.0326
07:01-08:00, Sat., 17 Oct. 0.0353 0.0306 0.0327
06:01-07:00, Sat., 17 Oct. 0.0353 0.0297 0.0329
05:01-06:00, Sat., 17 Oct. 0.0347 0.0308 0.0329
04:01-05:00, Sat., 17 Oct. 0.0349 0.0311 0.0329
03:01-04:00, Sat., 17 Oct. 0.0367 0.0308 0.0326
02:01-03:00, Sat., 17 Oct. 0.0346 0.0304 0.0324
01:01-02:00, Sat., 17 Oct. 0.0348 0.0304 0.0326
00:01-01:00, Sat., 17 Oct. 0.0350 0.0308 0.0328
23:01-24:00, Fri., 16 Oct. 0.0348 0.0304 0.0325
22:01-23:00, Fri., 16 Oct. 0.0343 0.0297 0.0321
21:01-22:00, Fri., 16 Oct. 0.0343 0.0294 0.0323
20:01-21:00, Fri., 16 Oct. 0.0343 0.0301 0.0322
19:01-20:00, Fri., 16 Oct. 0.0339 0.0295 0.0320
18:01-19:00, Fri., 16 Oct. 0.0343 0.0302 0.0320
17:01-18:00, Fri., 16 Oct. 0.0339 0.0295 0.0320
16:01-17:00, Fri., 16 Oct. 0.0340 0.0298 0.0318
15:01-16:00, Fri., 16 Oct. 0.0353 0.0300 0.0321
14:01-15:00, Fri., 16 Oct. 0.0343 0.0303 0.0321
13:01-14:00, Fri., 16 Oct. 0.0345 0.0297 0.0322
12:01-13:00, Fri., 16 Oct. 0.0346 0.0300 0.0325
11:01-12:00, Fri., 16 Oct. 0.0346 0.0301 0.0326
10:01-11:00, Fri., 16 Oct. 0.0350 0.0299 0.0326
09:01-10:00, Fri., 16 Oct. 0.0354 0.0308 0.0327
08:01-09:00, Fri., 16 Oct. 0.0350 0.0301 0.0326
07:01-08:00, Fri., 16 Oct. 0.0349 0.0306 0.0327
06:01-07:00, Fri., 16 Oct. 0.0349 0.0309 0.0324
05:01-06:00, Fri., 16 Oct. 0.0343 0.0300 0.0323
04:01-05:00, Fri., 16 Oct. 0.0347 0.0304 0.0321
03:01-04:00, Fri., 16 Oct. 0.0349 0.0304 0.0324
02:01-03:00, Fri., 16 Oct. 0.0348 0.0301 0.0324
01:01-02:00, Fri., 16 Oct. 0.0355 0.0290 0.0324
00:01-01:00, Fri., 16 Oct. 0.0346 0.0294 0.0325
23:01-24:00, Thu., 15 Oct. 0.0339 0.0290 0.0320
22:01-23:00, Thu., 15 Oct. 0.0350 0.0294 0.0323
21:01-22:00, Thu., 15 Oct. 0.0351 0.0305 0.0323
20:01-21:00, Thu., 15 Oct. 0.0343 0.0294 0.0321
19:01-20:00, Thu., 15 Oct. 0.0346 0.0292 0.0320
18:01-19:00, Thu., 15 Oct. 0.0349 0.0300 0.0323
17:01-18:00, Thu., 15 Oct. 0.0336 0.0301 0.0318
16:01-17:00, Thu., 15 Oct. 0.0350 0.0301 0.0320
15:01-16:00, Thu., 15 Oct. 0.0347 0.0302 0.0322
14:01-15:00, Thu., 15 Oct. 0.0339 0.0297 0.0321
13:01-14:00, Thu., 15 Oct. 0.0346 0.0300 0.0324
12:01-13:00, Thu., 15 Oct. 0.0344 0.0304 0.0322
11:01-12:00, Thu., 15 Oct. 0.0350 0.0304 0.0323
10:01-11:00, Thu., 15 Oct. 0.0351 0.0305 0.0324
09:01-10:00, Thu., 15 Oct. 0.0357 0.0302 0.0323
08:01-09:00, Thu., 15 Oct. 0.0348 0.0297 0.0324
07:01-08:00, Thu., 15 Oct. 0.0348 0.0300 0.0324
06:01-07:00, Thu., 15 Oct. 0.0343 0.0289 0.0319
05:01-06:00, Thu., 15 Oct. 0.0343 0.0291 0.0319
04:01-05:00, Thu., 15 Oct. 0.0350 0.0300 0.0321
03:01-04:00, Thu., 15 Oct. 0.0348 0.0305 0.0322
02:01-03:00, Thu., 15 Oct. 0.0349 0.0301 0.0324
01:01-02:00, Thu., 15 Oct. 0.0347 0.0306 0.0324
00:01-01:00, Thu., 15 Oct. 0.0345 0.0300 0.0325
23:01-24:00, Wed., 14 Oct. 0.0347 0.0299 0.0325
22:01-23:00, Wed., 14 Oct. 0.0353 0.0301 0.0325
21:01-22:00, Wed., 14 Oct. 0.0358 0.0303 0.0325
20:01-21:00, Wed., 14 Oct. 0.0350 0.0306 0.0325
19:01-20:00, Wed., 14 Oct. 0.0355 0.0308 0.0324
18:01-19:00, Wed., 14 Oct. 0.0343 0.0302 0.0321
17:01-18:00, Wed., 14 Oct. 0.0353 0.0298 0.0322
16:01-17:00, Wed., 14 Oct. 0.0353 0.0301 0.0324
15:01-16:00, Wed., 14 Oct. 0.0363 0.0311 0.0333
14:01-15:00, Wed., 14 Oct. 0.0391 0.0325 0.0353
13:01-14:00, Wed., 14 Oct. 0.0464 0.0362 0.0406
12:01-13:00, Wed., 14 Oct. 0.0464 0.0320 0.0384
11:01-12:00, Wed., 14 Oct. 0.0356 0.0293 0.0322
10:01-11:00, Wed., 14 Oct. 0.0339 0.0294 0.0320
09:01-10:00, Wed., 14 Oct. 0.0346 0.0306 0.0322
08:01-09:00, Wed., 14 Oct. 0.0346 0.0300 0.0322
07:01-08:00, Wed., 14 Oct. 0.0347 0.0298 0.0325
06:01-07:00, Wed., 14 Oct. 0.0351 0.0300 0.0324
05:01-06:00, Wed., 14 Oct. 0.0333 0.0304 0.0318
04:01-05:00, Wed., 14 Oct. 0.0343 0.0289 0.0320
03:01-04:00, Wed., 14 Oct. 0.0339 0.0302 0.0320
02:01-03:00, Wed., 14 Oct. 0.0338 0.0297 0.0320
01:01-02:00, Wed., 14 Oct. 0.0344 0.0285 0.0322
00:01-01:00, Wed., 14 Oct. 0.0349 0.0295 0.0319
23:01-24:00, Tue., 13 Oct. 0.0344 0.0297 0.0320
22:01-23:00, Tue., 13 Oct. 0.0338 0.0291 0.0321
21:01-22:00, Tue., 13 Oct. 0.0336 0.0284 0.0316
20:01-21:00, Tue., 13 Oct. 0.0338 0.0291 0.0318
19:01-20:00, Tue., 13 Oct. 0.0338 0.0300 0.0320
18:01-19:00, Tue., 13 Oct. 0.0346 0.0292 0.0320
17:01-18:00, Tue., 13 Oct. 0.0350 0.0297 0.0320
16:01-17:00, Tue., 13 Oct. 0.0345 0.0303 0.0322
15:01-16:00, Tue., 13 Oct. 0.0339 0.0300 0.0322
14:01-15:00, Tue., 13 Oct. 0.0364 0.0295 0.0325
13:01-14:00, Tue., 13 Oct. 0.0347 0.0299 0.0323
12:01-13:00, Tue., 13 Oct. 0.0346 0.0300 0.0322
11:01-12:00, Tue., 13 Oct. 0.0356 0.0298 0.0326
10:01-11:00, Tue., 13 Oct. 0.0348 0.0305 0.0321
09:01-10:00, Tue., 13 Oct. 0.0343 0.0302 0.0320
08:01-09:00, Tue., 13 Oct. 0.0352 0.0299 0.0319
07:01-08:00, Tue., 13 Oct. 0.0351 0.0298 0.0323
06:01-07:00, Tue., 13 Oct. 0.0344 0.0296 0.0322
05:01-06:00, Tue., 13 Oct. 0.0342 0.0303 0.0323
04:01-05:00, Tue., 13 Oct. 0.0353 0.0301 0.0323
03:01-04:00, Tue., 13 Oct. 0.0349 0.0294 0.0323
02:01-03:00, Tue., 13 Oct. 0.0343 0.0295 0.0323
01:01-02:00, Tue., 13 Oct. 0.0343 0.0303 0.0322
00:01-01:00, Tue., 13 Oct. 0.0348 0.0301 0.0322
23:01-24:00, Mon., 12 Oct. 0.0339 0.0298 0.0320
22:01-23:00, Mon., 12 Oct. 0.0339 0.0301 0.0321
21:01-22:00, Mon., 12 Oct. 0.0349 0.0292 0.0320
20:01-21:00, Mon., 12 Oct. 0.0339 0.0296 0.0319
19:01-20:00, Mon., 12 Oct. 0.0350 0.0297 0.0318
18:01-19:00, Mon., 12 Oct. 0.0339 0.0303 0.0319
17:01-18:00, Mon., 12 Oct. 0.0335 0.0286 0.0315
16:01-17:00, Mon., 12 Oct. 0.0344 0.0296 0.0315
15:01-16:00, Mon., 12 Oct. 0.0340 0.0301 0.0319
14:01-15:00, Mon., 12 Oct. 0.0349 0.0303 0.0324
13:01-14:00, Mon., 12 Oct. 0.0346 0.0300 0.0322
12:01-13:00, Mon., 12 Oct. 0.0344 0.0301 0.0322
11:01-12:00, Mon., 12 Oct. 0.0345 0.0308 0.0323
10:01-11:00, Mon., 12 Oct. 0.0352 0.0299 0.0325
09:01-10:00, Mon., 12 Oct. 0.0351 0.0301 0.0325
08:01-09:00, Mon., 12 Oct. 0.0346 0.0303 0.0326
07:01-08:00, Mon., 12 Oct. 0.0346 0.0307 0.0327
06:01-07:00, Mon., 12 Oct. 0.0348 0.0295 0.0322
05:01-06:00, Mon., 12 Oct. 0.0341 0.0305 0.0320
04:01-05:00, Mon., 12 Oct. 0.0343 0.0303 0.0321
03:01-04:00, Mon., 12 Oct. 0.0338 0.0300 0.0321
02:01-03:00, Mon., 12 Oct. 0.0340 0.0292 0.0319
01:01-02:00, Mon., 12 Oct. 0.0343 0.0301 0.0323
00:01-01:00, Mon., 12 Oct. 0.0336 0.0299 0.0320
23:01-24:00, Sun., 11 Oct. 0.0341 0.0302 0.0320
22:01-23:00, Sun., 11 Oct. 0.0350 0.0297 0.0321
21:01-22:00, Sun., 11 Oct. 0.0342 0.0297 0.0320
20:01-21:00, Sun., 11 Oct. 0.0349 0.0297 0.0320
19:01-20:00, Sun., 11 Oct. 0.0343 0.0287 0.0316
18:01-19:00, Sun., 11 Oct. 0.0353 0.0298 0.0321
17:01-18:00, Sun., 11 Oct. 0.0349 0.0288 0.0320
16:01-17:00, Sun., 11 Oct. 0.0346 0.0297 0.0323
15:01-16:00, Sun., 11 Oct. 0.0336 0.0294 0.0318
14:01-15:00, Sun., 11 Oct. 0.0354 0.0298 0.0322
13:01-14:00, Sun., 11 Oct. 0.0346 0.0298 0.0323
12:01-13:00, Sun., 11 Oct. 0.0339 0.0301 0.0323
11:01-12:00, Sun., 11 Oct. 0.0339 0.0297 0.0321
10:01-11:00, Sun., 11 Oct. 0.0343 0.0299 0.0321
09:01-10:00, Sun., 11 Oct. 0.0348 0.0298 0.0325
08:01-09:00, Sun., 11 Oct. 0.0352 0.0301 0.0325
07:01-08:00, Sun., 11 Oct. 0.0343 0.0304 0.0327
06:01-07:00, Sun., 11 Oct. 0.0343 0.0300 0.0321
05:01-06:00, Sun., 11 Oct. 0.0350 0.0301 0.0325
04:01-05:00, Sun., 11 Oct. 0.0343 0.0297 0.0319
03:01-04:00, Sun., 11 Oct. 0.0343 0.0306 0.0323
02:01-03:00, Sun., 11 Oct. 0.0340 0.0307 0.0322
01:01-02:00, Sun., 11 Oct. 0.0339 0.0297 0.0318
00:01-01:00, Sun., 11 Oct. 0.0350 0.0293 0.0318
23:01-24:00, Sat., 10 Oct. 0.0340 0.0297 0.0320
22:01-23:00, Sat., 10 Oct. 0.0343 0.0295 0.0318
21:01-22:00, Sat., 10 Oct. 0.0339 0.0300 0.0319
20:01-21:00, Sat., 10 Oct. 0.0344 0.0293 0.0319
19:01-20:00, Sat., 10 Oct. 0.0342 0.0291 0.0320
18:01-19:00, Sat., 10 Oct. 0.0339 0.0300 0.0318
17:01-18:00, Sat., 10 Oct. 0.0341 0.0295 0.0317
16:01-17:00, Sat., 10 Oct. 0.0346 0.0294 0.0316
15:01-16:00, Sat., 10 Oct. 0.0343 0.0298 0.0318
14:01-15:00, Sat., 10 Oct. 0.0345 0.0298 0.0319
13:01-14:00, Sat., 10 Oct. 0.0342 0.0301 0.0319
12:01-13:00, Sat., 10 Oct. 0.0348 0.0295 0.0320
11:01-12:00, Sat., 10 Oct. 0.0342 0.0300 0.0319
10:01-11:00, Sat., 10 Oct. 0.0342 0.0297 0.0320
09:01-10:00, Sat., 10 Oct. 0.0346 0.0301 0.0321
08:01-09:00, Sat., 10 Oct. 0.0347 0.0301 0.0320
07:01-08:00, Sat., 10 Oct. 0.0343 0.0291 0.0317
06:01-07:00, Sat., 10 Oct. 0.0340 0.0296 0.0317
05:01-06:00, Sat., 10 Oct. 0.0348 0.0294 0.0318
04:01-05:00, Sat., 10 Oct. 0.0336 0.0294 0.0316
03:01-04:00, Sat., 10 Oct. 0.0344 0.0283 0.0319
02:01-03:00, Sat., 10 Oct. 0.0339 0.0297 0.0317
01:01-02:00, Sat., 10 Oct. 0.0344 0.0297 0.0321
00:01-01:00, Sat., 10 Oct. 0.0343 0.0291 0.0318
23:01-24:00, Fri., 09 Oct. 0.0336 0.0286 0.0316
22:01-23:00, Fri., 09 Oct. 0.0347 0.0294 0.0316
21:01-22:00, Fri., 09 Oct. 0.0345 0.0303 0.0318
20:01-21:00, Fri., 09 Oct. 0.0349 0.0280 0.0317
19:01-20:00, Fri., 09 Oct. 0.0342 0.0295 0.0314
18:01-19:00, Fri., 09 Oct. 0.0346 0.0301 0.0322
17:01-18:00, Fri., 09 Oct. 0.0345 0.0299 0.0316
16:01-17:00, Fri., 09 Oct. 0.0343 0.0294 0.0317
15:01-16:00, Fri., 09 Oct. 0.0340 0.0305 0.0320
14:01-15:00, Fri., 09 Oct. 0.0346 0.0297 0.0319
13:01-14:00, Fri., 09 Oct. 0.0340 0.0296 0.0318
12:01-13:00, Fri., 09 Oct. 0.0361 0.0291 0.0315
11:01-12:00, Fri., 09 Oct. 0.0346 0.0295 0.0321
10:01-11:00, Fri., 09 Oct. 0.0341 0.0294 0.0323
09:01-10:00, Fri., 09 Oct. 0.0342 0.0291 0.0319
08:01-09:00, Fri., 09 Oct. 0.0349 0.0301 0.0325
07:01-08:00, Fri., 09 Oct. 0.0345 0.0293 0.0317
06:01-07:00, Fri., 09 Oct. 0.0343 0.0292 0.0316
05:01-06:00, Fri., 09 Oct. 0.0335 0.0297 0.0315
04:01-05:00, Fri., 09 Oct. 0.0357 0.0287 0.0314
03:01-04:00, Fri., 09 Oct. 0.0335 0.0290 0.0314
02:01-03:00, Fri., 09 Oct. 0.0343 0.0288 0.0317
01:01-02:00, Fri., 09 Oct. 0.0342 0.0291 0.0316
00:01-01:00, Fri., 09 Oct. 0.0338 0.0301 0.0317
23:01-24:00, Thu., 08 Oct. 0.0337 0.0293 0.0316
22:01-23:00, Thu., 08 Oct. 0.0340 0.0294 0.0315
21:01-22:00, Thu., 08 Oct. 0.0341 0.0297 0.0315
20:01-21:00, Thu., 08 Oct. 0.0343 0.0298 0.0315
19:01-20:00, Thu., 08 Oct. 0.0338 0.0292 0.0317
18:01-19:00, Thu., 08 Oct. 0.0340 0.0295 0.0315
17:01-18:00, Thu., 08 Oct. 0.0334 0.0294 0.0314
16:01-17:00, Thu., 08 Oct. 0.0336 0.0296 0.0314
15:01-16:00, Thu., 08 Oct. 0.0333 0.0083 0.0305
14:01-15:00, Thu., 08 Oct. 0.0341 0.0297 0.0318
13:01-14:00, Thu., 08 Oct. 0.0342 0.0300 0.0320
12:01-13:00, Thu., 08 Oct. 0.0340 0.0292 0.0319
11:01-12:00, Thu., 08 Oct. 0.0343 0.0304 0.0319
10:01-11:00, Thu., 08 Oct. 0.0347 0.0299 0.0320
09:01-10:00, Thu., 08 Oct. 0.0346 0.0282 0.0317
08:01-09:00, Thu., 08 Oct. 0.0341 0.0294 0.0320
07:01-08:00, Thu., 08 Oct. 0.0336 0.0292 0.0318
06:01-07:00, Thu., 08 Oct. 0.0336 0.0291 0.0315
05:01-06:00, Thu., 08 Oct. 0.0342 0.0300 0.0318
04:01-05:00, Thu., 08 Oct. 0.0336 0.0283 0.0313
03:01-04:00, Thu., 08 Oct. 0.0334 0.0300 0.0314
02:01-03:00, Thu., 08 Oct. 0.0339 0.0297 0.0317
01:01-02:00, Thu., 08 Oct. 0.0348 0.0294 0.0318
00:01-01:00, Thu., 08 Oct. 0.0346 0.0300 0.0321
23:01-24:00, Wed., 07 Oct. 0.0337 0.0291 0.0318
22:01-23:00, Wed., 07 Oct. 0.0343 0.0294 0.0318
21:01-22:00, Wed., 07 Oct. 0.0343 0.0289 0.0319
20:01-21:00, Wed., 07 Oct. 0.0348 0.0297 0.0319
19:01-20:00, Wed., 07 Oct. 0.0342 0.0294 0.0320
18:01-19:00, Wed., 07 Oct. 0.0346 0.0297 0.0320
17:01-18:00, Wed., 07 Oct. 0.0333 0.0294 0.0317
16:01-17:00, Wed., 07 Oct. 0.0336 0.0298 0.0318