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
11:01-12:00, Sat., 26 Apr. 0.0337 0.0294 0.0317
10:01-11:00, Sat., 26 Apr. 0.0343 0.0294 0.0318
09:01-10:00, Sat., 26 Apr. 0.0339 0.0297 0.0316
08:01-09:00, Sat., 26 Apr. 0.0334 0.0293 0.0314
07:01-08:00, Sat., 26 Apr. 0.0332 0.0294 0.0314
06:01-07:00, Sat., 26 Apr. 0.0333 0.0294 0.0315
05:01-06:00, Sat., 26 Apr. 0.0342 0.0293 0.0316
04:01-05:00, Sat., 26 Apr. 0.0339 0.0298 0.0317
03:01-04:00, Sat., 26 Apr. 0.0342 0.0297 0.0318
02:01-03:00, Sat., 26 Apr. 0.0341 0.0280 0.0315
01:01-02:00, Sat., 26 Apr. 0.0340 0.0287 0.0317
00:01-01:00, Sat., 26 Apr. 0.0345 0.0297 0.0317
23:01-24:00, Fri., 25 Apr. 0.0343 0.0291 0.0316
22:01-23:00, Fri., 25 Apr. 0.0339 0.0292 0.0314
21:01-22:00, Fri., 25 Apr. 0.0333 0.0301 0.0316
20:01-21:00, Fri., 25 Apr. 0.0345 0.0294 0.0316
19:01-20:00, Fri., 25 Apr. 0.0348 0.0294 0.0317
18:01-19:00, Fri., 25 Apr. 0.0348 0.0288 0.0318
17:01-18:00, Fri., 25 Apr. 0.0342 0.0304 0.0321
16:01-17:00, Fri., 25 Apr. 0.0338 0.0303 0.0320
15:01-16:00, Fri., 25 Apr. 0.0344 0.0295 0.0318
14:01-15:00, Fri., 25 Apr. 0.0340 0.0294 0.0319
13:01-14:00, Fri., 25 Apr. 0.0342 0.0300 0.0319
12:01-13:00, Fri., 25 Apr. 0.0341 0.0290 0.0318
11:01-12:00, Fri., 25 Apr. 0.0342 0.0303 0.0322
10:01-11:00, Fri., 25 Apr. 0.0340 0.0300 0.0320
09:01-10:00, Fri., 25 Apr. 0.0356 0.0287 0.0320
08:01-09:00, Fri., 25 Apr. 0.0339 0.0297 0.0314
07:01-08:00, Fri., 25 Apr. 0.0344 0.0293 0.0315
06:01-07:00, Fri., 25 Apr. 0.0341 0.0300 0.0316
05:01-06:00, Fri., 25 Apr. 0.0339 0.0287 0.0315
04:01-05:00, Fri., 25 Apr. 0.0342 0.0299 0.0318
03:01-04:00, Fri., 25 Apr. 0.0346 0.0291 0.0318
02:01-03:00, Fri., 25 Apr. 0.0339 0.0287 0.0319
01:01-02:00, Fri., 25 Apr. 0.0346 0.0298 0.0326
00:01-01:00, Fri., 25 Apr. 0.0356 0.0301 0.0330
23:01-24:00, Thu., 24 Apr. 0.0337 0.0284 0.0316
22:01-23:00, Thu., 24 Apr. 0.0337 0.0297 0.0315
21:01-22:00, Thu., 24 Apr. 0.0343 0.0288 0.0315
20:01-21:00, Thu., 24 Apr. 0.0348 0.0290 0.0315
19:01-20:00, Thu., 24 Apr. 0.0343 0.0290 0.0318
18:01-19:00, Thu., 24 Apr. 0.0342 0.0294 0.0319
17:01-18:00, Thu., 24 Apr. 0.0338 0.0294 0.0316
16:01-17:00, Thu., 24 Apr. 0.0336 0.0290 0.0316
15:01-16:00, Thu., 24 Apr. 0.0340 0.0296 0.0320
14:01-15:00, Thu., 24 Apr. 0.0347 0.0301 0.0321
13:01-14:00, Thu., 24 Apr. 0.0349 0.0298 0.0320
12:01-13:00, Thu., 24 Apr. 0.0339 0.0298 0.0320
11:01-12:00, Thu., 24 Apr. 0.0344 0.0296 0.0322
10:01-11:00, Thu., 24 Apr. 0.0343 0.0297 0.0321
09:01-10:00, Thu., 24 Apr. 0.0350 0.0293 0.0319
08:01-09:00, Thu., 24 Apr. 0.0340 0.0296 0.0318
07:01-08:00, Thu., 24 Apr. 0.0356 0.0292 0.0317
06:01-07:00, Thu., 24 Apr. 0.0342 0.0287 0.0314
05:01-06:00, Thu., 24 Apr. 0.0342 0.0302 0.0320
04:01-05:00, Thu., 24 Apr. 0.0335 0.0294 0.0316
03:01-04:00, Thu., 24 Apr. 0.0337 0.0289 0.0312
02:01-03:00, Thu., 24 Apr. 0.0339 0.0298 0.0316
01:01-02:00, Thu., 24 Apr. 0.0342 0.0294 0.0317
00:01-01:00, Thu., 24 Apr. 0.0336 0.0294 0.0315
23:01-24:00, Wed., 23 Apr. 0.0335 0.0286 0.0314
22:01-23:00, Wed., 23 Apr. 0.0342 0.0297 0.0314
21:01-22:00, Wed., 23 Apr. 0.0339 0.0289 0.0313
20:01-21:00, Wed., 23 Apr. 0.0338 0.0291 0.0314
19:01-20:00, Wed., 23 Apr. 0.0332 0.0298 0.0313
18:01-19:00, Wed., 23 Apr. 0.0336 0.0285 0.0317
17:01-18:00, Wed., 23 Apr. 0.0352 0.0303 0.0328
16:01-17:00, Wed., 23 Apr. 0.0362 0.0312 0.0340
15:01-16:00, Wed., 23 Apr. 0.0370 0.0314 0.0341
14:01-15:00, Wed., 23 Apr. 0.0398 0.0336 0.0368
13:01-14:00, Wed., 23 Apr. 0.0416 0.0351 0.0390
12:01-13:00, Wed., 23 Apr. 0.0391 0.0323 0.0363
11:01-12:00, Wed., 23 Apr. 0.0381 0.0343 0.0360
10:01-11:00, Wed., 23 Apr. 0.0393 0.0339 0.0366
09:01-10:00, Wed., 23 Apr. 0.0383 0.0333 0.0359
08:01-09:00, Wed., 23 Apr. 0.0388 0.0316 0.0354
07:01-08:00, Wed., 23 Apr. 0.0359 0.0309 0.0336
06:01-07:00, Wed., 23 Apr. 0.0395 0.0341 0.0370
05:01-06:00, Wed., 23 Apr. 0.0408 0.0353 0.0375
04:01-05:00, Wed., 23 Apr. 0.0421 0.0370 0.0395
03:01-04:00, Wed., 23 Apr. 0.0426 0.0360 0.0400
02:01-03:00, Wed., 23 Apr. 0.0420 0.0341 0.0384
01:01-02:00, Wed., 23 Apr. 0.0365 0.0301 0.0328
00:01-01:00, Wed., 23 Apr. 0.0342 0.0297 0.0321
23:01-24:00, Tue., 22 Apr. 0.0341 0.0304 0.0322
22:01-23:00, Tue., 22 Apr. 0.0343 0.0296 0.0322
21:01-22:00, Tue., 22 Apr. 0.0342 0.0294 0.0317
20:01-21:00, Tue., 22 Apr. 0.0340 0.0294 0.0317
19:01-20:00, Tue., 22 Apr. 0.0341 0.0296 0.0320
18:01-19:00, Tue., 22 Apr. 0.0353 0.0301 0.0322
17:01-18:00, Tue., 22 Apr. 0.0343 0.0291 0.0318
16:01-17:00, Tue., 22 Apr. 0.0338 0.0297 0.0319
15:01-16:00, Tue., 22 Apr. 0.0339 0.0287 0.0322
14:01-15:00, Tue., 22 Apr. 0.0348 0.0294 0.0321
13:01-14:00, Tue., 22 Apr. 0.0339 0.0304 0.0323
12:01-13:00, Tue., 22 Apr. 0.0345 0.0301 0.0321
11:01-12:00, Tue., 22 Apr. 0.0344 0.0297 0.0320
10:01-11:00, Tue., 22 Apr. 0.0342 0.0303 0.0321
09:01-10:00, Tue., 22 Apr. 0.0345 0.0296 0.0320
08:01-09:00, Tue., 22 Apr. 0.0347 0.0301 0.0321
07:01-08:00, Tue., 22 Apr. 0.0345 0.0293 0.0322
06:01-07:00, Tue., 22 Apr. 0.0345 0.0307 0.0324
05:01-06:00, Tue., 22 Apr. 0.0347 0.0300 0.0322
04:01-05:00, Tue., 22 Apr. 0.0342 0.0294 0.0321
03:01-04:00, Tue., 22 Apr. 0.0349 0.0301 0.0322
02:01-03:00, Tue., 22 Apr. 0.0343 0.0305 0.0325
01:01-02:00, Tue., 22 Apr. 0.0344 0.0291 0.0322
00:01-01:00, Tue., 22 Apr. 0.0344 0.0304 0.0321
23:01-24:00, Mon., 21 Apr. 0.0344 0.0300 0.0320
22:01-23:00, Mon., 21 Apr. 0.0343 0.0301 0.0321
21:01-22:00, Mon., 21 Apr. 0.0343 0.0288 0.0319
20:01-21:00, Mon., 21 Apr. 0.0345 0.0302 0.0322
19:01-20:00, Mon., 21 Apr. 0.0339 0.0291 0.0318
18:01-19:00, Mon., 21 Apr. 0.0342 0.0295 0.0319
17:01-18:00, Mon., 21 Apr. 0.0343 0.0298 0.0320
16:01-17:00, Mon., 21 Apr. 0.0346 0.0302 0.0324
15:01-16:00, Mon., 21 Apr. 0.0353 0.0302 0.0323
14:01-15:00, Mon., 21 Apr. 0.0342 0.0296 0.0320
13:01-14:00, Mon., 21 Apr. 0.0353 0.0304 0.0323
12:01-13:00, Mon., 21 Apr. 0.0343 0.0297 0.0321
11:01-12:00, Mon., 21 Apr. 0.0339 0.0301 0.0323
10:01-11:00, Mon., 21 Apr. 0.0356 0.0301 0.0328
09:01-10:00, Mon., 21 Apr. 0.0338 0.0293 0.0320
08:01-09:00, Mon., 21 Apr. 0.0341 0.0297 0.0319
07:01-08:00, Mon., 21 Apr. 0.0349 0.0308 0.0323
06:01-07:00, Mon., 21 Apr. 0.0341 0.0304 0.0320
05:01-06:00, Mon., 21 Apr. 0.0345 0.0303 0.0322
04:01-05:00, Mon., 21 Apr. 0.0340 0.0301 0.0322
03:01-04:00, Mon., 21 Apr. 0.0350 0.0301 0.0322
02:01-03:00, Mon., 21 Apr. 0.0341 0.0301 0.0319
01:01-02:00, Mon., 21 Apr. 0.0340 0.0298 0.0319
00:01-01:00, Mon., 21 Apr. 0.0334 0.0292 0.0318
23:01-24:00, Sun., 20 Apr. 0.0336 0.0293 0.0316
22:01-23:00, Sun., 20 Apr. 0.0333 0.0290 0.0315
21:01-22:00, Sun., 20 Apr. 0.0337 0.0294 0.0317
20:01-21:00, Sun., 20 Apr. 0.0339 0.0299 0.0318
19:01-20:00, Sun., 20 Apr. 0.0339 0.0298 0.0317
18:01-19:00, Sun., 20 Apr. 0.0339 0.0295 0.0317
17:01-18:00, Sun., 20 Apr. 0.0344 0.0301 0.0320
16:01-17:00, Sun., 20 Apr. 0.0350 0.0295 0.0318
15:01-16:00, Sun., 20 Apr. 0.0344 0.0299 0.0320
14:01-15:00, Sun., 20 Apr. 0.0348 0.0295 0.0319
13:01-14:00, Sun., 20 Apr. 0.0341 0.0301 0.0319
12:01-13:00, Sun., 20 Apr. 0.0341 0.0294 0.0318
11:01-12:00, Sun., 20 Apr. 0.0345 0.0298 0.0322
10:01-11:00, Sun., 20 Apr. 0.0347 0.0288 0.0318
09:01-10:00, Sun., 20 Apr. 0.0335 0.0290 0.0316
08:01-09:00, Sun., 20 Apr. 0.0349 0.0291 0.0319
07:01-08:00, Sun., 20 Apr. 0.0342 0.0289 0.0316
06:01-07:00, Sun., 20 Apr. 0.0343 0.0296 0.0319
05:01-06:00, Sun., 20 Apr. 0.0352 0.0285 0.0315
04:01-05:00, Sun., 20 Apr. 0.0339 0.0297 0.0314
03:01-04:00, Sun., 20 Apr. 0.0341 0.0294 0.0317
02:01-03:00, Sun., 20 Apr. 0.0342 0.0299 0.0318
01:01-02:00, Sun., 20 Apr. 0.0336 0.0303 0.0319
00:01-01:00, Sun., 20 Apr. 0.0340 0.0294 0.0316
23:01-24:00, Sat., 19 Apr. 0.0345 0.0300 0.0319
22:01-23:00, Sat., 19 Apr. 0.0340 0.0301 0.0317
21:01-22:00, Sat., 19 Apr. 0.0336 0.0291 0.0317
20:01-21:00, Sat., 19 Apr. 0.0343 0.0296 0.0316
19:01-20:00, Sat., 19 Apr. 0.0343 0.0300 0.0320
18:01-19:00, Sat., 19 Apr. 0.0343 0.0290 0.0319
17:01-18:00, Sat., 19 Apr. 0.0341 0.0293 0.0319
16:01-17:00, Sat., 19 Apr. 0.0352 0.0299 0.0319
15:01-16:00, Sat., 19 Apr. 0.0354 0.0305 0.0321
14:01-15:00, Sat., 19 Apr. 0.0341 0.0303 0.0322
13:01-14:00, Sat., 19 Apr. 0.0347 0.0301 0.0325
12:01-13:00, Sat., 19 Apr. 0.0352 0.0297 0.0323
11:01-12:00, Sat., 19 Apr. 0.0346 0.0304 0.0324
10:01-11:00, Sat., 19 Apr. 0.0340 0.0296 0.0318
09:01-10:00, Sat., 19 Apr. 0.0349 0.0296 0.0319
08:01-09:00, Sat., 19 Apr. 0.0346 0.0294 0.0317
07:01-08:00, Sat., 19 Apr. 0.0352 0.0292 0.0323
06:01-07:00, Sat., 19 Apr. 0.0349 0.0290 0.0320
05:01-06:00, Sat., 19 Apr. 0.0342 0.0294 0.0315
04:01-05:00, Sat., 19 Apr. 0.0346 0.0297 0.0318
03:01-04:00, Sat., 19 Apr. 0.0337 0.0300 0.0317
02:01-03:00, Sat., 19 Apr. 0.0336 0.0299 0.0318
01:01-02:00, Sat., 19 Apr. 0.0347 0.0290 0.0317
00:01-01:00, Sat., 19 Apr. 0.0338 0.0289 0.0317
23:01-24:00, Fri., 18 Apr. 0.0339 0.0289 0.0317
22:01-23:00, Fri., 18 Apr. 0.0340 0.0285 0.0317
21:01-22:00, Fri., 18 Apr. 0.0346 0.0301 0.0319
20:01-21:00, Fri., 18 Apr. 0.0335 0.0298 0.0317
19:01-20:00, Fri., 18 Apr. 0.0343 0.0292 0.0316
18:01-19:00, Fri., 18 Apr. 0.0344 0.0292 0.0315
17:01-18:00, Fri., 18 Apr. 0.0336 0.0291 0.0316
16:01-17:00, Fri., 18 Apr. 0.0348 0.0295 0.0319
15:01-16:00, Fri., 18 Apr. 0.0337 0.0296 0.0318
14:01-15:00, Fri., 18 Apr. 0.0340 0.0294 0.0320
13:01-14:00, Fri., 18 Apr. 0.0351 0.0298 0.0317
12:01-13:00, Fri., 18 Apr. 0.0337 0.0290 0.0317
11:01-12:00, Fri., 18 Apr. 0.0342 0.0301 0.0317
10:01-11:00, Fri., 18 Apr. 0.0344 0.0297 0.0322
09:01-10:00, Fri., 18 Apr. 0.0350 0.0310 0.0326
08:01-09:00, Fri., 18 Apr. 0.0356 0.0291 0.0329
07:01-08:00, Fri., 18 Apr. 0.0352 0.0311 0.0328
06:01-07:00, Fri., 18 Apr. 0.0349 0.0300 0.0330
05:01-06:00, Fri., 18 Apr. 0.0355 0.0303 0.0327
04:01-05:00, Fri., 18 Apr. 0.0344 0.0290 0.0320
03:01-04:00, Fri., 18 Apr. 0.0339 0.0297 0.0319
02:01-03:00, Fri., 18 Apr. 0.0332 0.0298 0.0315
01:01-02:00, Fri., 18 Apr. 0.0340 0.0287 0.0319
00:01-01:00, Fri., 18 Apr. 0.0338 0.0300 0.0315
23:01-24:00, Thu., 17 Apr. 0.0348 0.0291 0.0317
22:01-23:00, Thu., 17 Apr. 0.0339 0.0288 0.0317
21:01-22:00, Thu., 17 Apr. 0.0339 0.0299 0.0319
20:01-21:00, Thu., 17 Apr. 0.0353 0.0284 0.0318
19:01-20:00, Thu., 17 Apr. 0.0341 0.0283 0.0318
18:01-19:00, Thu., 17 Apr. 0.0337 0.0295 0.0316
17:01-18:00, Thu., 17 Apr. 0.0342 0.0301 0.0319
16:01-17:00, Thu., 17 Apr. 0.0355 0.0304 0.0326
15:01-16:00, Thu., 17 Apr. 0.0353 0.0297 0.0323
14:01-15:00, Thu., 17 Apr. 0.0344 0.0292 0.0322
13:01-14:00, Thu., 17 Apr. 0.0346 0.0305 0.0322
12:01-13:00, Thu., 17 Apr. 0.0348 0.0297 0.0323
11:01-12:00, Thu., 17 Apr. 0.0346 0.0306 0.0325
10:01-11:00, Thu., 17 Apr. 0.0345 0.0297 0.0325
09:01-10:00, Thu., 17 Apr. 0.0349 0.0303 0.0320
08:01-09:00, Thu., 17 Apr. 0.0343 0.0293 0.0320
07:01-08:00, Thu., 17 Apr. 0.0344 0.0297 0.0323
06:01-07:00, Thu., 17 Apr. 0.0341 0.0304 0.0322
05:01-06:00, Thu., 17 Apr. 0.0342 0.0293 0.0323
04:01-05:00, Thu., 17 Apr. 0.0348 0.0301 0.0322
03:01-04:00, Thu., 17 Apr. 0.0345 0.0300 0.0320
02:01-03:00, Thu., 17 Apr. 0.0349 0.0294 0.0321
01:01-02:00, Thu., 17 Apr. 0.0340 0.0297 0.0319
00:01-01:00, Thu., 17 Apr. 0.0343 0.0297 0.0318
23:01-24:00, Wed., 16 Apr. 0.0338 0.0291 0.0312
22:01-23:00, Wed., 16 Apr. 0.0336 0.0292 0.0319
21:01-22:00, Wed., 16 Apr. 0.0335 0.0297 0.0313
20:01-21:00, Wed., 16 Apr. 0.0336 0.0291 0.0317
19:01-20:00, Wed., 16 Apr. 0.0353 0.0294 0.0320
18:01-19:00, Wed., 16 Apr. 0.0337 0.0295 0.0319
17:01-18:00, Wed., 16 Apr. 0.0346 0.0293 0.0322
16:01-17:00, Wed., 16 Apr. 0.0350 0.0301 0.0326
15:01-16:00, Wed., 16 Apr. 0.0349 0.0300 0.0325
14:01-15:00, Wed., 16 Apr. 0.0349 0.0304 0.0327
13:01-14:00, Wed., 16 Apr. 0.0349 0.0304 0.0327
12:01-13:00, Wed., 16 Apr. 0.0349 0.0303 0.0323