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, Sun., 27 Jul. 0.0346 0.0301 0.0327
03:01-04:00, Sun., 27 Jul. 0.0349 0.0308 0.0328
02:01-03:00, Sun., 27 Jul. 0.0351 0.0308 0.0327
01:01-02:00, Sun., 27 Jul. 0.0349 0.0304 0.0329
00:01-01:00, Sun., 27 Jul. 0.0348 0.0306 0.0326
23:01-24:00, Sat., 26 Jul. 0.0356 0.0299 0.0327
22:01-23:00, Sat., 26 Jul. 0.0346 0.0302 0.0326
21:01-22:00, Sat., 26 Jul. 0.0346 0.0302 0.0326
20:01-21:00, Sat., 26 Jul. 0.0351 0.0308 0.0327
19:01-20:00, Sat., 26 Jul. 0.0352 0.0299 0.0325
18:01-19:00, Sat., 26 Jul. 0.0346 0.0311 0.0328
17:01-18:00, Sat., 26 Jul. 0.0346 0.0302 0.0327
16:01-17:00, Sat., 26 Jul. 0.0346 0.0303 0.0325
15:01-16:00, Sat., 26 Jul. 0.0356 0.0308 0.0329
14:01-15:00, Sat., 26 Jul. 0.0340 0.0301 0.0323
13:01-14:00, Sat., 26 Jul. 0.0354 0.0302 0.0326
12:01-13:00, Sat., 26 Jul. 0.0352 0.0302 0.0327
11:01-12:00, Sat., 26 Jul. 0.0343 0.0297 0.0325
10:01-11:00, Sat., 26 Jul. 0.0351 0.0308 0.0326
09:01-10:00, Sat., 26 Jul. 0.0358 0.0306 0.0328
08:01-09:00, Sat., 26 Jul. 0.0349 0.0315 0.0329
07:01-08:00, Sat., 26 Jul. 0.0349 0.0308 0.0325
06:01-07:00, Sat., 26 Jul. 0.0355 0.0305 0.0328
05:01-06:00, Sat., 26 Jul. 0.0359 0.0300 0.0324
04:01-05:00, Sat., 26 Jul. 0.0349 0.0305 0.0326
03:01-04:00, Sat., 26 Jul. 0.0351 0.0309 0.0328
02:01-03:00, Sat., 26 Jul. 0.0352 0.0310 0.0329
01:01-02:00, Sat., 26 Jul. 0.0353 0.0302 0.0325
00:01-01:00, Sat., 26 Jul. 0.0352 0.0301 0.0325
23:01-24:00, Fri., 25 Jul. 0.0353 0.0300 0.0328
22:01-23:00, Fri., 25 Jul. 0.0349 0.0306 0.0325
21:01-22:00, Fri., 25 Jul. 0.0343 0.0307 0.0325
20:01-21:00, Fri., 25 Jul. 0.0341 0.0302 0.0324
19:01-20:00, Fri., 25 Jul. 0.0346 0.0308 0.0328
18:01-19:00, Fri., 25 Jul. 0.0346 0.0296 0.0325
17:01-18:00, Fri., 25 Jul. 0.0351 0.0297 0.0324
16:01-17:00, Fri., 25 Jul. 0.0346 0.0305 0.0326
15:01-16:00, Fri., 25 Jul. 0.0354 0.0304 0.0324
14:01-15:00, Fri., 25 Jul. 0.0351 0.0299 0.0323
13:01-14:00, Fri., 25 Jul. 0.0349 0.0304 0.0325
12:01-13:00, Fri., 25 Jul. 0.0344 0.0300 0.0326
11:01-12:00, Fri., 25 Jul. 0.0346 0.0306 0.0327
10:01-11:00, Fri., 25 Jul. 0.0352 0.0310 0.0328
09:01-10:00, Fri., 25 Jul. 0.0345 0.0305 0.0324
08:01-09:00, Fri., 25 Jul. 0.0353 0.0304 0.0326
07:01-08:00, Fri., 25 Jul. 0.0343 0.0305 0.0326
06:01-07:00, Fri., 25 Jul. 0.0351 0.0308 0.0327
05:01-06:00, Fri., 25 Jul. 0.0349 0.0309 0.0329
04:01-05:00, Fri., 25 Jul. 0.0346 0.0309 0.0325
03:01-04:00, Fri., 25 Jul. 0.0347 0.0308 0.0326
02:01-03:00, Fri., 25 Jul. 0.0349 0.0304 0.0326
01:01-02:00, Fri., 25 Jul. 0.0350 0.0304 0.0325
00:01-01:00, Fri., 25 Jul. 0.0350 0.0304 0.0327
23:01-24:00, Thu., 24 Jul. 0.0348 0.0292 0.0324
22:01-23:00, Thu., 24 Jul. 0.0346 0.0304 0.0324
21:01-22:00, Thu., 24 Jul. 0.0347 0.0309 0.0326
20:01-21:00, Thu., 24 Jul. 0.0354 0.0303 0.0325
19:01-20:00, Thu., 24 Jul. 0.0350 0.0303 0.0326
18:01-19:00, Thu., 24 Jul. 0.0352 0.0304 0.0328
17:01-18:00, Thu., 24 Jul. 0.0353 0.0304 0.0324
16:01-17:00, Thu., 24 Jul. 0.0347 0.0303 0.0326
15:01-16:00, Thu., 24 Jul. 0.0348 0.0294 0.0324
14:01-15:00, Thu., 24 Jul. 0.0344 0.0297 0.0321
13:01-14:00, Thu., 24 Jul. 0.0355 0.0305 0.0327
12:01-13:00, Thu., 24 Jul. 0.0353 0.0304 0.0329
11:01-12:00, Thu., 24 Jul. 0.0355 0.0307 0.0332
10:01-11:00, Thu., 24 Jul. 0.0354 0.0304 0.0330
09:01-10:00, Thu., 24 Jul. 0.0351 0.0309 0.0327
08:01-09:00, Thu., 24 Jul. 0.0356 0.0303 0.0327
07:01-08:00, Thu., 24 Jul. 0.0356 0.0304 0.0329
06:01-07:00, Thu., 24 Jul. 0.0350 0.0305 0.0329
05:01-06:00, Thu., 24 Jul. 0.0347 0.0306 0.0327
04:01-05:00, Thu., 24 Jul. 0.0349 0.0303 0.0324
03:01-04:00, Thu., 24 Jul. 0.0345 0.0301 0.0325
02:01-03:00, Thu., 24 Jul. 0.0355 0.0297 0.0325
01:01-02:00, Thu., 24 Jul. 0.0346 0.0304 0.0325
00:01-01:00, Thu., 24 Jul. 0.0343 0.0300 0.0325
23:01-24:00, Wed., 23 Jul. 0.0346 0.0298 0.0321
22:01-23:00, Wed., 23 Jul. 0.0346 0.0302 0.0321
21:01-22:00, Wed., 23 Jul. 0.0346 0.0297 0.0323
20:01-21:00, Wed., 23 Jul. 0.0353 0.0294 0.0324
19:01-20:00, Wed., 23 Jul. 0.0348 0.0301 0.0324
18:01-19:00, Wed., 23 Jul. 0.0351 0.0302 0.0324
17:01-18:00, Wed., 23 Jul. 0.0350 0.0300 0.0324
16:01-17:00, Wed., 23 Jul. 0.0351 0.0291 0.0323
15:01-16:00, Wed., 23 Jul. 0.0343 0.0293 0.0323
14:01-15:00, Wed., 23 Jul. 0.0343 0.0298 0.0321
13:01-14:00, Wed., 23 Jul. 0.0343 0.0301 0.0322
12:01-13:00, Wed., 23 Jul. 0.0353 0.0302 0.0327
11:01-12:00, Wed., 23 Jul. 0.0356 0.0302 0.0327
10:01-11:00, Wed., 23 Jul. 0.0356 0.0304 0.0324
09:01-10:00, Wed., 23 Jul. 0.0354 0.0301 0.0324
08:01-09:00, Wed., 23 Jul. 0.0353 0.0302 0.0322
07:01-08:00, Wed., 23 Jul. 0.0347 0.0294 0.0323
06:01-07:00, Wed., 23 Jul. 0.0351 0.0301 0.0325
05:01-06:00, Wed., 23 Jul. 0.0343 0.0307 0.0326
04:01-05:00, Wed., 23 Jul. 0.0349 0.0301 0.0324
03:01-04:00, Wed., 23 Jul. 0.0346 0.0300 0.0324
02:01-03:00, Wed., 23 Jul. 0.0346 0.0308 0.0324
01:01-02:00, Wed., 23 Jul. 0.0359 0.0298 0.0323
00:01-01:00, Wed., 23 Jul. 0.0346 0.0301 0.0322
23:01-24:00, Tue., 22 Jul. 0.0343 0.0294 0.0322
22:01-23:00, Tue., 22 Jul. 0.0344 0.0294 0.0322
21:01-22:00, Tue., 22 Jul. 0.0355 0.0304 0.0324
20:01-21:00, Tue., 22 Jul. 0.0349 0.0294 0.0322
19:01-20:00, Tue., 22 Jul. 0.0337 0.0301 0.0320
18:01-19:00, Tue., 22 Jul. 0.0339 0.0308 0.0323
17:01-18:00, Tue., 22 Jul. 0.0345 0.0288 0.0320
16:01-17:00, Tue., 22 Jul. 0.0351 0.0300 0.0322
15:01-16:00, Tue., 22 Jul. 0.0366 0.0302 0.0324
14:01-15:00, Tue., 22 Jul. 0.0345 0.0291 0.0321
13:01-14:00, Tue., 22 Jul. 0.0343 0.0301 0.0324
12:01-13:00, Tue., 22 Jul. 0.0345 0.0300 0.0322
11:01-12:00, Tue., 22 Jul. 0.0346 0.0301 0.0322
10:01-11:00, Tue., 22 Jul. 0.0362 0.0294 0.0321
09:01-10:00, Tue., 22 Jul. 0.0340 0.0297 0.0319
08:01-09:00, Tue., 22 Jul. 0.0348 0.0300 0.0321
07:01-08:00, Tue., 22 Jul. 0.0343 0.0297 0.0323
06:01-07:00, Tue., 22 Jul. 0.0346 0.0305 0.0323
05:01-06:00, Tue., 22 Jul. 0.0339 0.0299 0.0321
04:01-05:00, Tue., 22 Jul. 0.0339 0.0302 0.0323
03:01-04:00, Tue., 22 Jul. 0.0350 0.0301 0.0325
02:01-03:00, Tue., 22 Jul. 0.0353 0.0301 0.0323
01:01-02:00, Tue., 22 Jul. 0.0347 0.0307 0.0325
00:01-01:00, Tue., 22 Jul. 0.0346 0.0299 0.0320
23:01-24:00, Mon., 21 Jul. 0.0346 0.0280 0.0321
22:01-23:00, Mon., 21 Jul. 0.0350 0.0294 0.0321
21:01-22:00, Mon., 21 Jul. 0.0340 0.0301 0.0321
20:01-21:00, Mon., 21 Jul. 0.0354 0.0303 0.0322
19:01-20:00, Mon., 21 Jul. 0.0339 0.0304 0.0321
18:01-19:00, Mon., 21 Jul. 0.0348 0.0295 0.0322
17:01-18:00, Mon., 21 Jul. 0.0339 0.0298 0.0321
16:01-17:00, Mon., 21 Jul. 0.0347 0.0301 0.0323
15:01-16:00, Mon., 21 Jul. 0.0353 0.0299 0.0321
14:01-15:00, Mon., 21 Jul. 0.0341 0.0303 0.0321
13:01-14:00, Mon., 21 Jul. 0.0342 0.0298 0.0320
12:01-13:00, Mon., 21 Jul. 0.0344 0.0294 0.0320
11:01-12:00, Mon., 21 Jul. 0.0346 0.0302 0.0324
10:01-11:00, Mon., 21 Jul. 0.0337 0.0302 0.0321
09:01-10:00, Mon., 21 Jul. 0.0344 0.0301 0.0320
08:01-09:00, Mon., 21 Jul. 0.0346 0.0303 0.0321
07:01-08:00, Mon., 21 Jul. 0.0345 0.0296 0.0321
06:01-07:00, Mon., 21 Jul. 0.0339 0.0302 0.0322
05:01-06:00, Mon., 21 Jul. 0.0344 0.0299 0.0320
04:01-05:00, Mon., 21 Jul. 0.0336 0.0301 0.0321
03:01-04:00, Mon., 21 Jul. 0.0344 0.0297 0.0319
02:01-03:00, Mon., 21 Jul. 0.0351 0.0297 0.0321
01:01-02:00, Mon., 21 Jul. 0.0345 0.0304 0.0322
00:01-01:00, Mon., 21 Jul. 0.0341 0.0297 0.0318
23:01-24:00, Sun., 20 Jul. 0.0339 0.0298 0.0319
22:01-23:00, Sun., 20 Jul. 0.0340 0.0298 0.0319
21:01-22:00, Sun., 20 Jul. 0.0340 0.0296 0.0321
20:01-21:00, Sun., 20 Jul. 0.0346 0.0301 0.0322
19:01-20:00, Sun., 20 Jul. 0.0343 0.0295 0.0320
18:01-19:00, Sun., 20 Jul. 0.0343 0.0304 0.0321
17:01-18:00, Sun., 20 Jul. 0.0344 0.0290 0.0320
16:01-17:00, Sun., 20 Jul. 0.0349 0.0287 0.0319
15:01-16:00, Sun., 20 Jul. 0.0341 0.0299 0.0321
14:01-15:00, Sun., 20 Jul. 0.0346 0.0290 0.0319
13:01-14:00, Sun., 20 Jul. 0.0338 0.0302 0.0320
12:01-13:00, Sun., 20 Jul. 0.0349 0.0295 0.0320
11:01-12:00, Sun., 20 Jul. 0.0343 0.0292 0.0321
10:01-11:00, Sun., 20 Jul. 0.0344 0.0298 0.0318
09:01-10:00, Sun., 20 Jul. 0.0342 0.0297 0.0319
08:01-09:00, Sun., 20 Jul. 0.0339 0.0292 0.0318
07:01-08:00, Sun., 20 Jul. 0.0345 0.0297 0.0320
06:01-07:00, Sun., 20 Jul. 0.0343 0.0289 0.0318
05:01-06:00, Sun., 20 Jul. 0.0345 0.0294 0.0318
04:01-05:00, Sun., 20 Jul. 0.0345 0.0301 0.0320
03:01-04:00, Sun., 20 Jul. 0.0345 0.0297 0.0318
02:01-03:00, Sun., 20 Jul. 0.0347 0.0298 0.0319
01:01-02:00, Sun., 20 Jul. 0.0350 0.0300 0.0319
00:01-01:00, Sun., 20 Jul. 0.0346 0.0301 0.0321
23:01-24:00, Sat., 19 Jul. 0.0348 0.0299 0.0320
22:01-23:00, Sat., 19 Jul. 0.0345 0.0299 0.0320
21:01-22:00, Sat., 19 Jul. 0.0349 0.0299 0.0317
20:01-21:00, Sat., 19 Jul. 0.0347 0.0294 0.0318
19:01-20:00, Sat., 19 Jul. 0.0348 0.0298 0.0317
18:01-19:00, Sat., 19 Jul. 0.0337 0.0292 0.0317
17:01-18:00, Sat., 19 Jul. 0.0339 0.0290 0.0317
16:01-17:00, Sat., 19 Jul. 0.0353 0.0297 0.0320
15:01-16:00, Sat., 19 Jul. 0.0353 0.0300 0.0318
14:01-15:00, Sat., 19 Jul. 0.0337 0.0295 0.0320
13:01-14:00, Sat., 19 Jul. 0.0343 0.0294 0.0319
12:01-13:00, Sat., 19 Jul. 0.0341 0.0290 0.0317
11:01-12:00, Sat., 19 Jul. 0.0343 0.0294 0.0321
10:01-11:00, Sat., 19 Jul. 0.0332 0.0291 0.0314
09:01-10:00, Sat., 19 Jul. 0.0334 0.0297 0.0316
08:01-09:00, Sat., 19 Jul. 0.0349 0.0291 0.0317
07:01-08:00, Sat., 19 Jul. 0.0337 0.0289 0.0315
06:01-07:00, Sat., 19 Jul. 0.0346 0.0295 0.0318
05:01-06:00, Sat., 19 Jul. 0.0342 0.0297 0.0318
04:01-05:00, Sat., 19 Jul. 0.0343 0.0294 0.0319
03:01-04:00, Sat., 19 Jul. 0.0333 0.0297 0.0316
02:01-03:00, Sat., 19 Jul. 0.0343 0.0283 0.0317
01:01-02:00, Sat., 19 Jul. 0.0346 0.0289 0.0317
00:01-01:00, Sat., 19 Jul. 0.0342 0.0297 0.0316
23:01-24:00, Fri., 18 Jul. 0.0336 0.0291 0.0315
22:01-23:00, Fri., 18 Jul. 0.0337 0.0295 0.0317
21:01-22:00, Fri., 18 Jul. 0.0353 0.0299 0.0318
20:01-21:00, Fri., 18 Jul. 0.0331 0.0290 0.0313
19:01-20:00, Fri., 18 Jul. 0.0334 0.0291 0.0314
18:01-19:00, Fri., 18 Jul. 0.0341 0.0282 0.0315
17:01-18:00, Fri., 18 Jul. 0.0338 0.0299 0.0317
16:01-17:00, Fri., 18 Jul. 0.0339 0.0295 0.0315
15:01-16:00, Fri., 18 Jul. 0.0330 0.0290 0.0313
14:01-15:00, Fri., 18 Jul. 0.0332 0.0297 0.0314
13:01-14:00, Fri., 18 Jul. 0.0323 0.0271 0.0303
12:01-13:00, Fri., 18 Jul. 0.0334 0.0280 0.0307
11:01-12:00, Fri., 18 Jul. 0.0337 0.0301 0.0318
10:01-11:00, Fri., 18 Jul. 0.0343 0.0287 0.0314
09:01-10:00, Fri., 18 Jul. 0.0330 0.0290 0.0311
08:01-09:00, Fri., 18 Jul. 0.0332 0.0294 0.0312
07:01-08:00, Fri., 18 Jul. 0.0343 0.0291 0.0314
06:01-07:00, Fri., 18 Jul. 0.0336 0.0290 0.0312
05:01-06:00, Fri., 18 Jul. 0.0334 0.0289 0.0314
04:01-05:00, Fri., 18 Jul. 0.0349 0.0289 0.0314
03:01-04:00, Fri., 18 Jul. 0.0346 0.0285 0.0313
02:01-03:00, Fri., 18 Jul. 0.0335 0.0285 0.0314
01:01-02:00, Fri., 18 Jul. 0.0351 0.0299 0.0316
00:01-01:00, Fri., 18 Jul. 0.0329 0.0294 0.0312
23:01-24:00, Thu., 17 Jul. 0.0336 0.0290 0.0315
22:01-23:00, Thu., 17 Jul. 0.0354 0.0289 0.0312
21:01-22:00, Thu., 17 Jul. 0.0332 0.0285 0.0310
20:01-21:00, Thu., 17 Jul. 0.0339 0.0292 0.0314
19:01-20:00, Thu., 17 Jul. 0.0339 0.0288 0.0315
18:01-19:00, Thu., 17 Jul. 0.0330 0.0289 0.0312
17:01-18:00, Thu., 17 Jul. 0.0335 0.0290 0.0315
16:01-17:00, Thu., 17 Jul. 0.0338 0.0284 0.0312
15:01-16:00, Thu., 17 Jul. 0.0332 0.0289 0.0313
14:01-15:00, Thu., 17 Jul. 0.0332 0.0285 0.0313
13:01-14:00, Thu., 17 Jul. 0.0348 0.0285 0.0311
12:01-13:00, Thu., 17 Jul. 0.0339 0.0293 0.0312
11:01-12:00, Thu., 17 Jul. 0.0327 0.0294 0.0312
10:01-11:00, Thu., 17 Jul. 0.0333 0.0289 0.0314
09:01-10:00, Thu., 17 Jul. 0.0334 0.0289 0.0308
08:01-09:00, Thu., 17 Jul. 0.0329 0.0294 0.0311
07:01-08:00, Thu., 17 Jul. 0.0341 0.0280 0.0311
06:01-07:00, Thu., 17 Jul. 0.0330 0.0294 0.0310
05:01-06:00, Thu., 17 Jul. 0.0337 0.0284 0.0307