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
21:01-22:00, Thu., 16 Apr. 0.0329 0.0290 0.0310
20:01-21:00, Thu., 16 Apr. 0.0338 0.0298 0.0311
19:01-20:00, Thu., 16 Apr. 0.0339 0.0292 0.0311
18:01-19:00, Thu., 16 Apr. 0.0329 0.0288 0.0312
17:01-18:00, Thu., 16 Apr. 0.0342 0.0282 0.0310
16:01-17:00, Thu., 16 Apr. 0.0335 0.0293 0.0313
15:01-16:00, Thu., 16 Apr. 0.0343 0.0294 0.0315
14:01-15:00, Thu., 16 Apr. 0.0337 0.0294 0.0315
13:01-14:00, Thu., 16 Apr. 0.0341 0.0290 0.0317
12:01-13:00, Thu., 16 Apr. 0.0338 0.0297 0.0317
11:01-12:00, Thu., 16 Apr. 0.0342 0.0290 0.0319
10:01-11:00, Thu., 16 Apr. 0.0338 0.0300 0.0317
09:01-10:00, Thu., 16 Apr. 0.0339 0.0285 0.0315
08:01-09:00, Thu., 16 Apr. 0.0332 0.0280 0.0313
07:01-08:00, Thu., 16 Apr. 0.0338 0.0286 0.0316
06:01-07:00, Thu., 16 Apr. 0.0346 0.0299 0.0318
05:01-06:00, Thu., 16 Apr. 0.0350 0.0290 0.0320
04:01-05:00, Thu., 16 Apr. 0.0361 0.0301 0.0333
03:01-04:00, Thu., 16 Apr. 0.0377 0.0326 0.0354
02:01-03:00, Thu., 16 Apr. 0.0378 0.0334 0.0353
01:01-02:00, Thu., 16 Apr. 0.0385 0.0336 0.0357
00:01-01:00, Thu., 16 Apr. 0.0409 0.0354 0.0383
23:01-24:00, Wed., 15 Apr. 0.0465 0.0382 0.0420
22:01-23:00, Wed., 15 Apr. 0.0475 0.0380 0.0439
21:01-22:00, Wed., 15 Apr. 0.0428 0.0367 0.0395
20:01-21:00, Wed., 15 Apr. 0.0435 0.0364 0.0403
19:01-20:00, Wed., 15 Apr. 0.0378 0.0304 0.0334
18:01-19:00, Wed., 15 Apr. 0.0349 0.0303 0.0327
17:01-18:00, Wed., 15 Apr. 0.0337 0.0290 0.0317
16:01-17:00, Wed., 15 Apr. 0.0334 0.0287 0.0314
15:01-16:00, Wed., 15 Apr. 0.0343 0.0294 0.0314
14:01-15:00, Wed., 15 Apr. 0.0342 0.0284 0.0317
13:01-14:00, Wed., 15 Apr. 0.0340 0.0283 0.0318
12:01-13:00, Wed., 15 Apr. 0.0343 0.0290 0.0315
11:01-12:00, Wed., 15 Apr. 0.0343 0.0294 0.0313
10:01-11:00, Wed., 15 Apr. 0.0335 0.0289 0.0315
09:01-10:00, Wed., 15 Apr. 0.0350 0.0295 0.0316
08:01-09:00, Wed., 15 Apr. 0.0339 0.0299 0.0315
07:01-08:00, Wed., 15 Apr. 0.0339 0.0293 0.0312
06:01-07:00, Wed., 15 Apr. 0.0338 0.0290 0.0316
05:01-06:00, Wed., 15 Apr. 0.0336 0.0292 0.0314
04:01-05:00, Wed., 15 Apr. 0.0335 0.0288 0.0315
03:01-04:00, Wed., 15 Apr. 0.0336 0.0287 0.0317
02:01-03:00, Wed., 15 Apr. 0.0339 0.0297 0.0316
01:01-02:00, Wed., 15 Apr. 0.0337 0.0290 0.0314
00:01-01:00, Wed., 15 Apr. 0.0331 0.0289 0.0314
23:01-24:00, Tue., 14 Apr. 0.0332 0.0290 0.0310
22:01-23:00, Tue., 14 Apr. 0.0336 0.0297 0.0315
21:01-22:00, Tue., 14 Apr. 0.0335 0.0294 0.0313
20:01-21:00, Tue., 14 Apr. 0.0346 0.0287 0.0312
19:01-20:00, Tue., 14 Apr. 0.0330 0.0294 0.0312
18:01-19:00, Tue., 14 Apr. 0.0345 0.0294 0.0316
17:01-18:00, Tue., 14 Apr. 0.0340 0.0296 0.0315
16:01-17:00, Tue., 14 Apr. 0.0334 0.0287 0.0311
15:01-16:00, Tue., 14 Apr. 0.0332 0.0290 0.0312
14:01-15:00, Tue., 14 Apr. 0.0330 0.0290 0.0317
13:01-14:00, Tue., 14 Apr. 0.0339 0.0286 0.0317
12:01-13:00, Tue., 14 Apr. 0.0339 0.0291 0.0314
11:01-12:00, Tue., 14 Apr. 0.0335 0.0294 0.0315
10:01-11:00, Tue., 14 Apr. 0.0337 0.0290 0.0316
09:01-10:00, Tue., 14 Apr. 0.0332 0.0294 0.0313
08:01-09:00, Tue., 14 Apr. 0.0342 0.0296 0.0318
07:01-08:00, Tue., 14 Apr. 0.0342 0.0297 0.0319
06:01-07:00, Tue., 14 Apr. 0.0346 0.0294 0.0318
05:01-06:00, Tue., 14 Apr. 0.0343 0.0295 0.0314
04:01-05:00, Tue., 14 Apr. 0.0356 0.0291 0.0314
03:01-04:00, Tue., 14 Apr. 0.0335 0.0289 0.0313
02:01-03:00, Tue., 14 Apr. 0.0334 0.0294 0.0314
01:01-02:00, Tue., 14 Apr. 0.0330 0.0297 0.0312
00:01-01:00, Tue., 14 Apr. 0.0333 0.0291 0.0311
23:01-24:00, Mon., 13 Apr. 0.0335 0.0286 0.0311
22:01-23:00, Mon., 13 Apr. 0.0335 0.0283 0.0314
21:01-22:00, Mon., 13 Apr. 0.0329 0.0290 0.0312
20:01-21:00, Mon., 13 Apr. 0.0341 0.0293 0.0314
19:01-20:00, Mon., 13 Apr. 0.0340 0.0291 0.0314
18:01-19:00, Mon., 13 Apr. 0.0332 0.0291 0.0312
17:01-18:00, Mon., 13 Apr. 0.0336 0.0291 0.0314
16:01-17:00, Mon., 13 Apr. 0.0336 0.0296 0.0315
15:01-16:00, Mon., 13 Apr. 0.0338 0.0290 0.0314
14:01-15:00, Mon., 13 Apr. 0.0348 0.0297 0.0315
13:01-14:00, Mon., 13 Apr. 0.0338 0.0297 0.0316
12:01-13:00, Mon., 13 Apr. 0.0335 0.0287 0.0314
11:01-12:00, Mon., 13 Apr. 0.0348 0.0294 0.0315
10:01-11:00, Mon., 13 Apr. 0.0341 0.0284 0.0315
09:01-10:00, Mon., 13 Apr. 0.0339 0.0298 0.0317
08:01-09:00, Mon., 13 Apr. 0.0352 0.0301 0.0320
07:01-08:00, Mon., 13 Apr. 0.0338 0.0298 0.0319
06:01-07:00, Mon., 13 Apr. 0.0339 0.0293 0.0317
05:01-06:00, Mon., 13 Apr. 0.0336 0.0293 0.0315
04:01-05:00, Mon., 13 Apr. 0.0332 0.0289 0.0314
03:01-04:00, Mon., 13 Apr. 0.0334 0.0290 0.0314
02:01-03:00, Mon., 13 Apr. 0.0332 0.0283 0.0311
01:01-02:00, Mon., 13 Apr. 0.0339 0.0294 0.0314
00:01-01:00, Mon., 13 Apr. 0.0335 0.0287 0.0313
23:01-24:00, Sun., 12 Apr. 0.0337 0.0297 0.0316
22:01-23:00, Sun., 12 Apr. 0.0339 0.0296 0.0312
21:01-22:00, Sun., 12 Apr. 0.0336 0.0294 0.0312
20:01-21:00, Sun., 12 Apr. 0.0346 0.0290 0.0313
19:01-20:00, Sun., 12 Apr. 0.0331 0.0287 0.0312
18:01-19:00, Sun., 12 Apr. 0.0336 0.0290 0.0315
17:01-18:00, Sun., 12 Apr. 0.0334 0.0290 0.0315
16:01-17:00, Sun., 12 Apr. 0.0343 0.0295 0.0316
15:01-16:00, Sun., 12 Apr. 0.0334 0.0297 0.0315
14:01-15:00, Sun., 12 Apr. 0.0343 0.0290 0.0318
13:01-14:00, Sun., 12 Apr. 0.0339 0.0297 0.0319
12:01-13:00, Sun., 12 Apr. 0.0344 0.0285 0.0317
11:01-12:00, Sun., 12 Apr. 0.0341 0.0295 0.0317
10:01-11:00, Sun., 12 Apr. 0.0333 0.0290 0.0316
09:01-10:00, Sun., 12 Apr. 0.0336 0.0290 0.0315
08:01-09:00, Sun., 12 Apr. 0.0338 0.0293 0.0314
07:01-08:00, Sun., 12 Apr. 0.0338 0.0293 0.0315
06:01-07:00, Sun., 12 Apr. 0.0336 0.0290 0.0316
05:01-06:00, Sun., 12 Apr. 0.0336 0.0282 0.0312
04:01-05:00, Sun., 12 Apr. 0.0341 0.0289 0.0317
03:01-04:00, Sun., 12 Apr. 0.0333 0.0289 0.0312
02:01-03:00, Sun., 12 Apr. 0.0337 0.0298 0.0315
01:01-02:00, Sun., 12 Apr. 0.0337 0.0294 0.0315
00:01-01:00, Sun., 12 Apr. 0.0336 0.0292 0.0315
23:01-24:00, Sat., 11 Apr. 0.0341 0.0288 0.0316
22:01-23:00, Sat., 11 Apr. 0.0345 0.0283 0.0314
21:01-22:00, Sat., 11 Apr. 0.0337 0.0292 0.0312
20:01-21:00, Sat., 11 Apr. 0.0346 0.0293 0.0318
19:01-20:00, Sat., 11 Apr. 0.0339 0.0290 0.0317
18:01-19:00, Sat., 11 Apr. 0.0341 0.0291 0.0314
17:01-18:00, Sat., 11 Apr. 0.0341 0.0291 0.0318
16:01-17:00, Sat., 11 Apr. 0.0356 0.0291 0.0320
15:01-16:00, Sat., 11 Apr. 0.0346 0.0295 0.0318
14:01-15:00, Sat., 11 Apr. 0.0346 0.0295 0.0320
13:01-14:00, Sat., 11 Apr. 0.0347 0.0297 0.0320
12:01-13:00, Sat., 11 Apr. 0.0347 0.0294 0.0321
11:01-12:00, Sat., 11 Apr. 0.0336 0.0297 0.0320
10:01-11:00, Sat., 11 Apr. 0.0339 0.0293 0.0320
09:01-10:00, Sat., 11 Apr. 0.0351 0.0290 0.0323
08:01-09:00, Sat., 11 Apr. 0.0352 0.0294 0.0324
07:01-08:00, Sat., 11 Apr. 0.0347 0.0297 0.0319
06:01-07:00, Sat., 11 Apr. 0.0347 0.0299 0.0319
05:01-06:00, Sat., 11 Apr. 0.0345 0.0294 0.0318
04:01-05:00, Sat., 11 Apr. 0.0340 0.0288 0.0317
03:01-04:00, Sat., 11 Apr. 0.0337 0.0292 0.0316
02:01-03:00, Sat., 11 Apr. 0.0340 0.0288 0.0312
01:01-02:00, Sat., 11 Apr. 0.0336 0.0288 0.0313
00:01-01:00, Sat., 11 Apr. 0.0339 0.0289 0.0312
23:01-24:00, Fri., 10 Apr. 0.0339 0.0300 0.0316
22:01-23:00, Fri., 10 Apr. 0.0350 0.0303 0.0325
21:01-22:00, Fri., 10 Apr. 0.0429 0.0321 0.0374
20:01-21:00, Fri., 10 Apr. 0.0580 0.0409 0.0498
19:01-20:00, Fri., 10 Apr. 0.0566 0.0491 0.0531
18:01-19:00, Fri., 10 Apr. 0.0519 0.0425 0.0469
17:01-18:00, Fri., 10 Apr. 0.0454 0.0346 0.0412
16:01-17:00, Fri., 10 Apr. 0.0363 0.0312 0.0334
15:01-16:00, Fri., 10 Apr. 0.0384 0.0313 0.0343
14:01-15:00, Fri., 10 Apr. 0.0402 0.0328 0.0363
13:01-14:00, Fri., 10 Apr. 0.0412 0.0333 0.0370
12:01-13:00, Fri., 10 Apr. 0.0388 0.0335 0.0360
11:01-12:00, Fri., 10 Apr. 0.0387 0.0323 0.0354
10:01-11:00, Fri., 10 Apr. 0.0381 0.0321 0.0350
09:01-10:00, Fri., 10 Apr. 0.0363 0.0310 0.0338
08:01-09:00, Fri., 10 Apr. 0.0365 0.0318 0.0344
07:01-08:00, Fri., 10 Apr. 0.0370 0.0312 0.0336
06:01-07:00, Fri., 10 Apr. 0.0352 0.0296 0.0326
05:01-06:00, Fri., 10 Apr. 0.0370 0.0300 0.0337
04:01-05:00, Fri., 10 Apr. 0.0392 0.0337 0.0360
03:01-04:00, Fri., 10 Apr. 0.0380 0.0330 0.0352
02:01-03:00, Fri., 10 Apr. 0.0387 0.0308 0.0351
01:01-02:00, Fri., 10 Apr. 0.0353 0.0300 0.0328
00:01-01:00, Fri., 10 Apr. 0.0368 0.0318 0.0345
23:01-24:00, Thu., 09 Apr. 0.0356 0.0305 0.0328
22:01-23:00, Thu., 09 Apr. 0.0352 0.0301 0.0330
21:01-22:00, Thu., 09 Apr. 0.0341 0.0291 0.0315
20:01-21:00, Thu., 09 Apr. 0.0333 0.0297 0.0314
19:01-20:00, Thu., 09 Apr. 0.0340 0.0290 0.0315
18:01-19:00, Thu., 09 Apr. 0.0340 0.0297 0.0315
17:01-18:00, Thu., 09 Apr. 0.0336 0.0291 0.0315
16:01-17:00, Thu., 09 Apr. 0.0343 0.0294 0.0313
15:01-16:00, Thu., 09 Apr. 0.0329 0.0289 0.0312
14:01-15:00, Thu., 09 Apr. 0.0329 0.0290 0.0311
13:01-14:00, Thu., 09 Apr. 0.0327 0.0295 0.0312
12:01-13:00, Thu., 09 Apr. 0.0343 0.0285 0.0316
11:01-12:00, Thu., 09 Apr. 0.0334 0.0302 0.0317
10:01-11:00, Thu., 09 Apr. 0.0331 0.0287 0.0313
09:01-10:00, Thu., 09 Apr. 0.0341 0.0293 0.0315
08:01-09:00, Thu., 09 Apr. 0.0341 0.0295 0.0314
07:01-08:00, Thu., 09 Apr. 0.0334 0.0294 0.0315
06:01-07:00, Thu., 09 Apr. 0.0335 0.0280 0.0317
05:01-06:00, Thu., 09 Apr. 0.0336 0.0294 0.0315
04:01-05:00, Thu., 09 Apr. 0.0334 0.0295 0.0316
03:01-04:00, Thu., 09 Apr. 0.0336 0.0295 0.0318
02:01-03:00, Thu., 09 Apr. 0.0346 0.0293 0.0315
01:01-02:00, Thu., 09 Apr. 0.0355 0.0295 0.0316
00:01-01:00, Thu., 09 Apr. 0.0346 0.0292 0.0317
23:01-24:00, Wed., 08 Apr. 0.0336 0.0294 0.0316
22:01-23:00, Wed., 08 Apr. 0.0334 0.0285 0.0316
21:01-22:00, Wed., 08 Apr. 0.0337 0.0292 0.0315
20:01-21:00, Wed., 08 Apr. 0.0338 0.0294 0.0315
19:01-20:00, Wed., 08 Apr. 0.0343 0.0293 0.0315
18:01-19:00, Wed., 08 Apr. 0.0332 0.0290 0.0312
17:01-18:00, Wed., 08 Apr. 0.0335 0.0287 0.0310
16:01-17:00, Wed., 08 Apr. 0.0341 0.0294 0.0314
15:01-16:00, Wed., 08 Apr. 0.0332 0.0297 0.0313
14:01-15:00, Wed., 08 Apr. 0.0339 0.0290 0.0314
13:01-14:00, Wed., 08 Apr. 0.0343 0.0285 0.0316
12:01-13:00, Wed., 08 Apr. 0.0355 0.0282 0.0318
11:01-12:00, Wed., 08 Apr. 0.0339 0.0293 0.0314
10:01-11:00, Wed., 08 Apr. 0.0341 0.0283 0.0314
09:01-10:00, Wed., 08 Apr. 0.0332 0.0292 0.0314
08:01-09:00, Wed., 08 Apr. 0.0335 0.0295 0.0313
07:01-08:00, Wed., 08 Apr. 0.0330 0.0292 0.0313
06:01-07:00, Wed., 08 Apr. 0.0341 0.0290 0.0311
05:01-06:00, Wed., 08 Apr. 0.0331 0.0289 0.0310
04:01-05:00, Wed., 08 Apr. 0.0329 0.0289 0.0310
03:01-04:00, Wed., 08 Apr. 0.0337 0.0295 0.0311
02:01-03:00, Wed., 08 Apr. 0.0328 0.0287 0.0310
01:01-02:00, Wed., 08 Apr. 0.0333 0.0286 0.0310
00:01-01:00, Wed., 08 Apr. 0.0335 0.0292 0.0313
23:01-24:00, Tue., 07 Apr. 0.0336 0.0291 0.0315
22:01-23:00, Tue., 07 Apr. 0.0343 0.0294 0.0314
21:01-22:00, Tue., 07 Apr. 0.0332 0.0285 0.0313
20:01-21:00, Tue., 07 Apr. 0.0344 0.0290 0.0315
19:01-20:00, Tue., 07 Apr. 0.0338 0.0294 0.0314
18:01-19:00, Tue., 07 Apr. 0.0340 0.0294 0.0317
17:01-18:00, Tue., 07 Apr. 0.0334 0.0290 0.0317
16:01-17:00, Tue., 07 Apr. 0.0341 0.0294 0.0317
15:01-16:00, Tue., 07 Apr. 0.0342 0.0290 0.0317
14:01-15:00, Tue., 07 Apr. 0.0354 0.0300 0.0327
13:01-14:00, Tue., 07 Apr. 0.0414 0.0322 0.0354
12:01-13:00, Tue., 07 Apr. 0.0397 0.0337 0.0371
11:01-12:00, Tue., 07 Apr. 0.0381 0.0312 0.0353
10:01-11:00, Tue., 07 Apr. 0.0355 0.0297 0.0322
09:01-10:00, Tue., 07 Apr. 0.0339 0.0289 0.0316
08:01-09:00, Tue., 07 Apr. 0.0329 0.0283 0.0313
07:01-08:00, Tue., 07 Apr. 0.0338 0.0280 0.0311
06:01-07:00, Tue., 07 Apr. 0.0339 0.0292 0.0310
05:01-06:00, Tue., 07 Apr. 0.0337 0.0286 0.0312
04:01-05:00, Tue., 07 Apr. 0.0334 0.0292 0.0313
03:01-04:00, Tue., 07 Apr. 0.0340 0.0288 0.0314
02:01-03:00, Tue., 07 Apr. 0.0337 0.0288 0.0315
01:01-02:00, Tue., 07 Apr. 0.0346 0.0288 0.0313
00:01-01:00, Tue., 07 Apr. 0.0334 0.0292 0.0314
23:01-24:00, Mon., 06 Apr. 0.0337 0.0284 0.0314
22:01-23:00, Mon., 06 Apr. 0.0346 0.0289 0.0314