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
00:01-01:00, Tue., 20 May. 0.0345 0.0297 0.0315
23:01-24:00, Mon., 19 May. 0.0337 0.0290 0.0315
22:01-23:00, Mon., 19 May. 0.0343 0.0294 0.0315
21:01-22:00, Mon., 19 May. 0.0340 0.0294 0.0315
20:01-21:00, Mon., 19 May. 0.0348 0.0290 0.0315
19:01-20:00, Mon., 19 May. 0.0341 0.0301 0.0320
18:01-19:00, Mon., 19 May. 0.0342 0.0294 0.0317
17:01-18:00, Mon., 19 May. 0.0348 0.0294 0.0318
16:01-17:00, Mon., 19 May. 0.0334 0.0293 0.0317
15:01-16:00, Mon., 19 May. 0.0343 0.0299 0.0321
14:01-15:00, Mon., 19 May. 0.0339 0.0287 0.0319
13:01-14:00, Mon., 19 May. 0.0342 0.0297 0.0317
12:01-13:00, Mon., 19 May. 0.0343 0.0301 0.0318
11:01-12:00, Mon., 19 May. 0.0338 0.0294 0.0319
10:01-11:00, Mon., 19 May. 0.0347 0.0301 0.0323
09:01-10:00, Mon., 19 May. 0.0341 0.0290 0.0317
08:01-09:00, Mon., 19 May. 0.0344 0.0299 0.0318
07:01-08:00, Mon., 19 May. 0.0339 0.0297 0.0320
06:01-07:00, Mon., 19 May. 0.0346 0.0297 0.0324
05:01-06:00, Mon., 19 May. 0.0340 0.0299 0.0323
04:01-05:00, Mon., 19 May. 0.0346 0.0301 0.0325
03:01-04:00, Mon., 19 May. 0.0347 0.0300 0.0322
02:01-03:00, Mon., 19 May. 0.0352 0.0302 0.0326
01:01-02:00, Mon., 19 May. 0.0347 0.0295 0.0319
00:01-01:00, Mon., 19 May. 0.0346 0.0293 0.0318
23:01-24:00, Sun., 18 May. 0.0346 0.0294 0.0318
22:01-23:00, Sun., 18 May. 0.0341 0.0297 0.0320
21:01-22:00, Sun., 18 May. 0.0339 0.0289 0.0316
20:01-21:00, Sun., 18 May. 0.0340 0.0284 0.0315
19:01-20:00, Sun., 18 May. 0.0343 0.0298 0.0319
18:01-19:00, Sun., 18 May. 0.0343 0.0303 0.0320
17:01-18:00, Sun., 18 May. 0.0345 0.0297 0.0320
16:01-17:00, Sun., 18 May. 0.0350 0.0301 0.0321
15:01-16:00, Sun., 18 May. 0.0346 0.0292 0.0318
14:01-15:00, Sun., 18 May. 0.0349 0.0294 0.0318
13:01-14:00, Sun., 18 May. 0.0339 0.0287 0.0316
12:01-13:00, Sun., 18 May. 0.0345 0.0297 0.0318
11:01-12:00, Sun., 18 May. 0.0338 0.0297 0.0317
10:01-11:00, Sun., 18 May. 0.0336 0.0293 0.0318
09:01-10:00, Sun., 18 May. 0.0337 0.0296 0.0317
08:01-09:00, Sun., 18 May. 0.0356 0.0295 0.0317
07:01-08:00, Sun., 18 May. 0.0331 0.0292 0.0312
06:01-07:00, Sun., 18 May. 0.0336 0.0296 0.0313
05:01-06:00, Sun., 18 May. 0.0341 0.0289 0.0313
04:01-05:00, Sun., 18 May. 0.0332 0.0293 0.0312
03:01-04:00, Sun., 18 May. 0.0343 0.0294 0.0315
02:01-03:00, Sun., 18 May. 0.0331 0.0284 0.0313
01:01-02:00, Sun., 18 May. 0.0342 0.0284 0.0311
00:01-01:00, Sun., 18 May. 0.0344 0.0290 0.0314
23:01-24:00, Sat., 17 May. 0.0336 0.0287 0.0313
22:01-23:00, Sat., 17 May. 0.0339 0.0291 0.0315
21:01-22:00, Sat., 17 May. 0.0339 0.0287 0.0313
20:01-21:00, Sat., 17 May. 0.0334 0.0290 0.0311
19:01-20:00, Sat., 17 May. 0.0332 0.0289 0.0312
18:01-19:00, Sat., 17 May. 0.0336 0.0292 0.0313
17:01-18:00, Sat., 17 May. 0.0338 0.0292 0.0314
16:01-17:00, Sat., 17 May. 0.0348 0.0305 0.0324
15:01-16:00, Sat., 17 May. 0.0393 0.0315 0.0353
14:01-15:00, Sat., 17 May. 0.0406 0.0355 0.0379
13:01-14:00, Sat., 17 May. 0.0405 0.0332 0.0365
12:01-13:00, Sat., 17 May. 0.0359 0.0307 0.0334
11:01-12:00, Sat., 17 May. 0.0360 0.0304 0.0330
10:01-11:00, Sat., 17 May. 0.0363 0.0315 0.0337
09:01-10:00, Sat., 17 May. 0.0365 0.0318 0.0349
08:01-09:00, Sat., 17 May. 0.0360 0.0316 0.0338
07:01-08:00, Sat., 17 May. 0.0356 0.0311 0.0329
06:01-07:00, Sat., 17 May. 0.0362 0.0309 0.0337
05:01-06:00, Sat., 17 May. 0.0396 0.0331 0.0365
04:01-05:00, Sat., 17 May. 0.0412 0.0343 0.0374
03:01-04:00, Sat., 17 May. 0.0410 0.0338 0.0376
02:01-03:00, Sat., 17 May. 0.0377 0.0316 0.0347
01:01-02:00, Sat., 17 May. 0.0346 0.0292 0.0320
00:01-01:00, Sat., 17 May. 0.0349 0.0292 0.0318
23:01-24:00, Fri., 16 May. 0.0341 0.0293 0.0318
22:01-23:00, Fri., 16 May. 0.0336 0.0290 0.0318
21:01-22:00, Fri., 16 May. 0.0344 0.0281 0.0315
20:01-21:00, Fri., 16 May. 0.0337 0.0294 0.0319
19:01-20:00, Fri., 16 May. 0.0337 0.0292 0.0316
18:01-19:00, Fri., 16 May. 0.0337 0.0303 0.0318
17:01-18:00, Fri., 16 May. 0.0340 0.0290 0.0316
16:01-17:00, Fri., 16 May. 0.0344 0.0290 0.0317
15:01-16:00, Fri., 16 May. 0.0346 0.0288 0.0316
14:01-15:00, Fri., 16 May. 0.0344 0.0297 0.0320
13:01-14:00, Fri., 16 May. 0.0338 0.0291 0.0319
12:01-13:00, Fri., 16 May. 0.0350 0.0304 0.0321
11:01-12:00, Fri., 16 May. 0.0347 0.0304 0.0323
10:01-11:00, Fri., 16 May. 0.0356 0.0301 0.0322
09:01-10:00, Fri., 16 May. 0.0343 0.0301 0.0322
08:01-09:00, Fri., 16 May. 0.0343 0.0300 0.0324
07:01-08:00, Fri., 16 May. 0.0345 0.0303 0.0324
06:01-07:00, Fri., 16 May. 0.0349 0.0306 0.0325
05:01-06:00, Fri., 16 May. 0.0341 0.0292 0.0320
04:01-05:00, Fri., 16 May. 0.0342 0.0294 0.0314
03:01-04:00, Fri., 16 May. 0.0335 0.0283 0.0312
02:01-03:00, Fri., 16 May. 0.0332 0.0297 0.0316
01:01-02:00, Fri., 16 May. 0.0335 0.0297 0.0318
00:01-01:00, Fri., 16 May. 0.0333 0.0293 0.0316
23:01-24:00, Thu., 15 May. 0.0353 0.0291 0.0318
22:01-23:00, Thu., 15 May. 0.0343 0.0295 0.0319
21:01-22:00, Thu., 15 May. 0.0346 0.0294 0.0317
20:01-21:00, Thu., 15 May. 0.0336 0.0295 0.0315
19:01-20:00, Thu., 15 May. 0.0343 0.0287 0.0318
18:01-19:00, Thu., 15 May. 0.0339 0.0298 0.0314
17:01-18:00, Thu., 15 May. 0.0338 0.0296 0.0315
16:01-17:00, Thu., 15 May. 0.0339 0.0293 0.0318
15:01-16:00, Thu., 15 May. 0.0343 0.0299 0.0320
14:01-15:00, Thu., 15 May. 0.0345 0.0297 0.0316
13:01-14:00, Thu., 15 May. 0.0340 0.0295 0.0318
12:01-13:00, Thu., 15 May. 0.0339 0.0303 0.0318
11:01-12:00, Thu., 15 May. 0.0344 0.0303 0.0316
10:01-11:00, Thu., 15 May. 0.0346 0.0292 0.0319
09:01-10:00, Thu., 15 May. 0.0346 0.0281 0.0316
08:01-09:00, Thu., 15 May. 0.0337 0.0290 0.0316
07:01-08:00, Thu., 15 May. 0.0336 0.0290 0.0316
06:01-07:00, Thu., 15 May. 0.0343 0.0293 0.0317
05:01-06:00, Thu., 15 May. 0.0342 0.0289 0.0318
04:01-05:00, Thu., 15 May. 0.0335 0.0289 0.0315
03:01-04:00, Thu., 15 May. 0.0333 0.0280 0.0314
02:01-03:00, Thu., 15 May. 0.0342 0.0292 0.0314
01:01-02:00, Thu., 15 May. 0.0333 0.0290 0.0312
00:01-01:00, Thu., 15 May. 0.0339 0.0293 0.0315
23:01-24:00, Wed., 14 May. 0.0343 0.0284 0.0315
22:01-23:00, Wed., 14 May. 0.0335 0.0294 0.0316
21:01-22:00, Wed., 14 May. 0.0345 0.0295 0.0316
20:01-21:00, Wed., 14 May. 0.0342 0.0294 0.0316
19:01-20:00, Wed., 14 May. 0.0343 0.0291 0.0315
18:01-19:00, Wed., 14 May. 0.0339 0.0300 0.0317
17:01-18:00, Wed., 14 May. 0.0332 0.0295 0.0313
16:01-17:00, Wed., 14 May. 0.0339 0.0287 0.0314
15:01-16:00, Wed., 14 May. 0.0336 0.0295 0.0317
14:01-15:00, Wed., 14 May. 0.0336 0.0297 0.0315
13:01-14:00, Wed., 14 May. 0.0346 0.0296 0.0321
12:01-13:00, Wed., 14 May. 0.0342 0.0294 0.0319
11:01-12:00, Wed., 14 May. 0.0342 0.0297 0.0319
10:01-11:00, Wed., 14 May. 0.0346 0.0302 0.0318
09:01-10:00, Wed., 14 May. 0.0336 0.0288 0.0315
08:01-09:00, Wed., 14 May. 0.0336 0.0291 0.0316
07:01-08:00, Wed., 14 May. 0.0340 0.0302 0.0320
06:01-07:00, Wed., 14 May. 0.0336 0.0294 0.0316
05:01-06:00, Wed., 14 May. 0.0343 0.0289 0.0315
04:01-05:00, Wed., 14 May. 0.0339 0.0297 0.0315
03:01-04:00, Wed., 14 May. 0.0348 0.0290 0.0315
02:01-03:00, Wed., 14 May. 0.0336 0.0294 0.0315
01:01-02:00, Wed., 14 May. 0.0336 0.0287 0.0314
00:01-01:00, Wed., 14 May. 0.0335 0.0289 0.0314
23:01-24:00, Tue., 13 May. 0.0333 0.0294 0.0314
22:01-23:00, Tue., 13 May. 0.0332 0.0294 0.0314
21:01-22:00, Tue., 13 May. 0.0334 0.0285 0.0318
20:01-21:00, Tue., 13 May. 0.0346 0.0294 0.0316
19:01-20:00, Tue., 13 May. 0.0346 0.0290 0.0315
18:01-19:00, Tue., 13 May. 0.0342 0.0301 0.0317
17:01-18:00, Tue., 13 May. 0.0343 0.0295 0.0316
16:01-17:00, Tue., 13 May. 0.0334 0.0283 0.0318
15:01-16:00, Tue., 13 May. 0.0340 0.0297 0.0318
14:01-15:00, Tue., 13 May. 0.0349 0.0294 0.0319
13:01-14:00, Tue., 13 May. 0.0341 0.0293 0.0319
12:01-13:00, Tue., 13 May. 0.0341 0.0301 0.0319
11:01-12:00, Tue., 13 May. 0.0342 0.0300 0.0320
10:01-11:00, Tue., 13 May. 0.0344 0.0296 0.0315
09:01-10:00, Tue., 13 May. 0.0348 0.0297 0.0316
08:01-09:00, Tue., 13 May. 0.0342 0.0301 0.0319
07:01-08:00, Tue., 13 May. 0.0339 0.0289 0.0316
06:01-07:00, Tue., 13 May. 0.0340 0.0287 0.0312
05:01-06:00, Tue., 13 May. 0.0339 0.0297 0.0316
04:01-05:00, Tue., 13 May. 0.0338 0.0297 0.0314
03:01-04:00, Tue., 13 May. 0.0336 0.0293 0.0314
02:01-03:00, Tue., 13 May. 0.0336 0.0292 0.0314
01:01-02:00, Tue., 13 May. 0.0338 0.0283 0.0312
00:01-01:00, Tue., 13 May. 0.0340 0.0287 0.0315
23:01-24:00, Mon., 12 May. 0.0335 0.0290 0.0313
22:01-23:00, Mon., 12 May. 0.0329 0.0287 0.0312
21:01-22:00, Mon., 12 May. 0.0335 0.0290 0.0314
20:01-21:00, Mon., 12 May. 0.0341 0.0294 0.0313
19:01-20:00, Mon., 12 May. 0.0340 0.0286 0.0312
18:01-19:00, Mon., 12 May. 0.0333 0.0285 0.0309
17:01-18:00, Mon., 12 May. 0.0334 0.0290 0.0313
16:01-17:00, Mon., 12 May. 0.0348 0.0290 0.0313
15:01-16:00, Mon., 12 May. 0.0342 0.0297 0.0318
14:01-15:00, Mon., 12 May. 0.0345 0.0291 0.0318
13:01-14:00, Mon., 12 May. 0.0338 0.0289 0.0317
12:01-13:00, Mon., 12 May. 0.0354 0.0295 0.0318
11:01-12:00, Mon., 12 May. 0.0334 0.0296 0.0314
10:01-11:00, Mon., 12 May. 0.0336 0.0284 0.0314
09:01-10:00, Mon., 12 May. 0.0339 0.0291 0.0316
08:01-09:00, Mon., 12 May. 0.0363 0.0301 0.0330
07:01-08:00, Mon., 12 May. 0.0368 0.0325 0.0343
06:01-07:00, Mon., 12 May. 0.0363 0.0315 0.0340
05:01-06:00, Mon., 12 May. 0.0382 0.0325 0.0349
04:01-05:00, Mon., 12 May. 0.0380 0.0326 0.0355
03:01-04:00, Mon., 12 May. 0.0393 0.0346 0.0368
02:01-03:00, Mon., 12 May. 0.0395 0.0339 0.0367
01:01-02:00, Mon., 12 May. 0.0385 0.0326 0.0348
00:01-01:00, Mon., 12 May. 0.0366 0.0319 0.0345
23:01-24:00, Sun., 11 May. 0.0391 0.0323 0.0355
22:01-23:00, Sun., 11 May. 0.0382 0.0336 0.0363
21:01-22:00, Sun., 11 May. 0.0381 0.0329 0.0352
20:01-21:00, Sun., 11 May. 0.0341 0.0297 0.0321
19:01-20:00, Sun., 11 May. 0.0343 0.0291 0.0320
18:01-19:00, Sun., 11 May. 0.0349 0.0290 0.0319
17:01-18:00, Sun., 11 May. 0.0338 0.0297 0.0318
16:01-17:00, Sun., 11 May. 0.0345 0.0288 0.0321
15:01-16:00, Sun., 11 May. 0.0347 0.0301 0.0324
14:01-15:00, Sun., 11 May. 0.0339 0.0295 0.0321
13:01-14:00, Sun., 11 May. 0.0343 0.0299 0.0323
12:01-13:00, Sun., 11 May. 0.0346 0.0301 0.0324
11:01-12:00, Sun., 11 May. 0.0348 0.0297 0.0321
10:01-11:00, Sun., 11 May. 0.0344 0.0299 0.0324
09:01-10:00, Sun., 11 May. 0.0344 0.0299 0.0323
08:01-09:00, Sun., 11 May. 0.0348 0.0298 0.0325
07:01-08:00, Sun., 11 May. 0.0353 0.0304 0.0321
06:01-07:00, Sun., 11 May. 0.0358 0.0292 0.0320
05:01-06:00, Sun., 11 May. 0.0345 0.0298 0.0318
04:01-05:00, Sun., 11 May. 0.0356 0.0290 0.0319
03:01-04:00, Sun., 11 May. 0.0343 0.0293 0.0318
02:01-03:00, Sun., 11 May. 0.0346 0.0297 0.0323
01:01-02:00, Sun., 11 May. 0.0347 0.0301 0.0324
00:01-01:00, Sun., 11 May. 0.0353 0.0308 0.0326
23:01-24:00, Sat., 10 May. 0.0344 0.0307 0.0323
22:01-23:00, Sat., 10 May. 0.0351 0.0300 0.0325
21:01-22:00, Sat., 10 May. 0.0344 0.0304 0.0324
20:01-21:00, Sat., 10 May. 0.0355 0.0301 0.0325
19:01-20:00, Sat., 10 May. 0.0349 0.0296 0.0321
18:01-19:00, Sat., 10 May. 0.0342 0.0299 0.0319
17:01-18:00, Sat., 10 May. 0.0353 0.0294 0.0319
16:01-17:00, Sat., 10 May. 0.0339 0.0294 0.0318
15:01-16:00, Sat., 10 May. 0.0348 0.0294 0.0319
14:01-15:00, Sat., 10 May. 0.0349 0.0292 0.0315
13:01-14:00, Sat., 10 May. 0.0346 0.0294 0.0315
12:01-13:00, Sat., 10 May. 0.0333 0.0295 0.0316
11:01-12:00, Sat., 10 May. 0.0349 0.0300 0.0321
10:01-11:00, Sat., 10 May. 0.0367 0.0316 0.0342
09:01-10:00, Sat., 10 May. 0.0400 0.0336 0.0357
08:01-09:00, Sat., 10 May. 0.0367 0.0321 0.0346
07:01-08:00, Sat., 10 May. 0.0404 0.0339 0.0372
06:01-07:00, Sat., 10 May. 0.0418 0.0358 0.0383
05:01-06:00, Sat., 10 May. 0.0387 0.0320 0.0348
04:01-05:00, Sat., 10 May. 0.0379 0.0315 0.0350
03:01-04:00, Sat., 10 May. 0.0449 0.0354 0.0396
02:01-03:00, Sat., 10 May. 0.0433 0.0352 0.0392
01:01-02:00, Sat., 10 May. 0.0382 0.0332 0.0355