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
16:01-17:00, Mon., 18 Aug. 0.0357 0.0309 0.0332
15:01-16:00, Mon., 18 Aug. 0.0354 0.0308 0.0330
14:01-15:00, Mon., 18 Aug. 0.0353 0.0305 0.0333
13:01-14:00, Mon., 18 Aug. 0.0350 0.0315 0.0332
12:01-13:00, Mon., 18 Aug. 0.0358 0.0306 0.0334
11:01-12:00, Mon., 18 Aug. 0.0356 0.0312 0.0333
10:01-11:00, Mon., 18 Aug. 0.0356 0.0303 0.0334
09:01-10:00, Mon., 18 Aug. 0.0356 0.0315 0.0333
08:01-09:00, Mon., 18 Aug. 0.0356 0.0310 0.0332
07:01-08:00, Mon., 18 Aug. 0.0353 0.0304 0.0332
06:01-07:00, Mon., 18 Aug. 0.0349 0.0302 0.0330
05:01-06:00, Mon., 18 Aug. 0.0364 0.0308 0.0332
04:01-05:00, Mon., 18 Aug. 0.0372 0.0307 0.0329
03:01-04:00, Mon., 18 Aug. 0.0357 0.0309 0.0333
02:01-03:00, Mon., 18 Aug. 0.0353 0.0306 0.0328
01:01-02:00, Mon., 18 Aug. 0.0360 0.0307 0.0329
00:01-01:00, Mon., 18 Aug. 0.0362 0.0304 0.0331
23:01-24:00, Sun., 17 Aug. 0.0349 0.0301 0.0328
22:01-23:00, Sun., 17 Aug. 0.0347 0.0310 0.0330
21:01-22:00, Sun., 17 Aug. 0.0356 0.0307 0.0328
20:01-21:00, Sun., 17 Aug. 0.0349 0.0304 0.0328
19:01-20:00, Sun., 17 Aug. 0.0353 0.0302 0.0328
18:01-19:00, Sun., 17 Aug. 0.0350 0.0309 0.0330
17:01-18:00, Sun., 17 Aug. 0.0354 0.0294 0.0328
16:01-17:00, Sun., 17 Aug. 0.0349 0.0305 0.0326
15:01-16:00, Sun., 17 Aug. 0.0362 0.0304 0.0326
14:01-15:00, Sun., 17 Aug. 0.0354 0.0301 0.0326
13:01-14:00, Sun., 17 Aug. 0.0352 0.0301 0.0327
12:01-13:00, Sun., 17 Aug. 0.0351 0.0310 0.0328
11:01-12:00, Sun., 17 Aug. 0.0349 0.0304 0.0327
10:01-11:00, Sun., 17 Aug. 0.0356 0.0306 0.0327
09:01-10:00, Sun., 17 Aug. 0.0353 0.0308 0.0327
08:01-09:00, Sun., 17 Aug. 0.0363 0.0305 0.0325
07:01-08:00, Sun., 17 Aug. 0.0341 0.0301 0.0322
06:01-07:00, Sun., 17 Aug. 0.0359 0.0297 0.0326
05:01-06:00, Sun., 17 Aug. 0.0352 0.0302 0.0327
04:01-05:00, Sun., 17 Aug. 0.0349 0.0304 0.0326
03:01-04:00, Sun., 17 Aug. 0.0347 0.0311 0.0326
02:01-03:00, Sun., 17 Aug. 0.0355 0.0297 0.0327
01:01-02:00, Sun., 17 Aug. 0.0350 0.0301 0.0327
00:01-01:00, Sun., 17 Aug. 0.0351 0.0304 0.0326
23:01-24:00, Sat., 16 Aug. 0.0350 0.0310 0.0326
22:01-23:00, Sat., 16 Aug. 0.0349 0.0299 0.0323
21:01-22:00, Sat., 16 Aug. 0.0351 0.0302 0.0323
20:01-21:00, Sat., 16 Aug. 0.0351 0.0297 0.0323
19:01-20:00, Sat., 16 Aug. 0.0352 0.0296 0.0326
18:01-19:00, Sat., 16 Aug. 0.0343 0.0295 0.0324
17:01-18:00, Sat., 16 Aug. 0.0346 0.0295 0.0325
16:01-17:00, Sat., 16 Aug. 0.0347 0.0302 0.0326
15:01-16:00, Sat., 16 Aug. 0.0340 0.0302 0.0323
14:01-15:00, Sat., 16 Aug. 0.0353 0.0305 0.0324
13:01-14:00, Sat., 16 Aug. 0.0356 0.0304 0.0325
12:01-13:00, Sat., 16 Aug. 0.0360 0.0306 0.0326
11:01-12:00, Sat., 16 Aug. 0.0349 0.0301 0.0327
10:01-11:00, Sat., 16 Aug. 0.0348 0.0304 0.0324
09:01-10:00, Sat., 16 Aug. 0.0347 0.0307 0.0324
08:01-09:00, Sat., 16 Aug. 0.0349 0.0305 0.0326
07:01-08:00, Sat., 16 Aug. 0.0343 0.0304 0.0326
06:01-07:00, Sat., 16 Aug. 0.0363 0.0311 0.0328
05:01-06:00, Sat., 16 Aug. 0.0350 0.0294 0.0326
04:01-05:00, Sat., 16 Aug. 0.0344 0.0300 0.0324
03:01-04:00, Sat., 16 Aug. 0.0347 0.0301 0.0325
02:01-03:00, Sat., 16 Aug. 0.0351 0.0302 0.0324
01:01-02:00, Sat., 16 Aug. 0.0351 0.0301 0.0324
00:01-01:00, Sat., 16 Aug. 0.0349 0.0301 0.0325
23:01-24:00, Fri., 15 Aug. 0.0346 0.0298 0.0324
22:01-23:00, Fri., 15 Aug. 0.0352 0.0300 0.0323
21:01-22:00, Fri., 15 Aug. 0.0350 0.0304 0.0323
20:01-21:00, Fri., 15 Aug. 0.0354 0.0305 0.0325
19:01-20:00, Fri., 15 Aug. 0.0346 0.0309 0.0325
18:01-19:00, Fri., 15 Aug. 0.0344 0.0307 0.0324
17:01-18:00, Fri., 15 Aug. 0.0343 0.0305 0.0322
16:01-17:00, Fri., 15 Aug. 0.0354 0.0307 0.0325
15:01-16:00, Fri., 15 Aug. 0.0353 0.0305 0.0326
14:01-15:00, Fri., 15 Aug. 0.0349 0.0302 0.0324
13:01-14:00, Fri., 15 Aug. 0.0346 0.0295 0.0326
12:01-13:00, Fri., 15 Aug. 0.0349 0.0305 0.0327
11:01-12:00, Fri., 15 Aug. 0.0343 0.0302 0.0324
10:01-11:00, Fri., 15 Aug. 0.0347 0.0298 0.0326
09:01-10:00, Fri., 15 Aug. 0.0349 0.0302 0.0326
08:01-09:00, Fri., 15 Aug. 0.0341 0.0303 0.0323
07:01-08:00, Fri., 15 Aug. 0.0350 0.0301 0.0324
06:01-07:00, Fri., 15 Aug. 0.0340 0.0302 0.0324
05:01-06:00, Fri., 15 Aug. 0.0343 0.0295 0.0325
04:01-05:00, Fri., 15 Aug. 0.0346 0.0305 0.0323
03:01-04:00, Fri., 15 Aug. 0.0343 0.0304 0.0323
02:01-03:00, Fri., 15 Aug. 0.0346 0.0299 0.0325
01:01-02:00, Fri., 15 Aug. 0.0352 0.0306 0.0323
00:01-01:00, Fri., 15 Aug. 0.0339 0.0300 0.0322
23:01-24:00, Thu., 14 Aug. 0.0343 0.0301 0.0323
22:01-23:00, Thu., 14 Aug. 0.0343 0.0298 0.0322
21:01-22:00, Thu., 14 Aug. 0.0353 0.0297 0.0322
20:01-21:00, Thu., 14 Aug. 0.0344 0.0297 0.0323
19:01-20:00, Thu., 14 Aug. 0.0349 0.0297 0.0324
18:01-19:00, Thu., 14 Aug. 0.0350 0.0299 0.0322
17:01-18:00, Thu., 14 Aug. 0.0348 0.0301 0.0325
16:01-17:00, Thu., 14 Aug. 0.0343 0.0297 0.0323
15:01-16:00, Thu., 14 Aug. 0.0347 0.0304 0.0324
14:01-15:00, Thu., 14 Aug. 0.0342 0.0302 0.0325
13:01-14:00, Thu., 14 Aug. 0.0342 0.0300 0.0323
12:01-13:00, Thu., 14 Aug. 0.0346 0.0296 0.0320
11:01-12:00, Thu., 14 Aug. 0.0346 0.0300 0.0321
10:01-11:00, Thu., 14 Aug. 0.0345 0.0291 0.0323
09:01-10:00, Thu., 14 Aug. 0.0351 0.0286 0.0320
08:01-09:00, Thu., 14 Aug. 0.0345 0.0297 0.0324
07:01-08:00, Thu., 14 Aug. 0.0346 0.0297 0.0325
06:01-07:00, Thu., 14 Aug. 0.0351 0.0303 0.0325
05:01-06:00, Thu., 14 Aug. 0.0354 0.0297 0.0323
04:01-05:00, Thu., 14 Aug. 0.0353 0.0304 0.0324
03:01-04:00, Thu., 14 Aug. 0.0343 0.0301 0.0322
02:01-03:00, Thu., 14 Aug. 0.0350 0.0297 0.0321
01:01-02:00, Thu., 14 Aug. 0.0344 0.0304 0.0323
00:01-01:00, Thu., 14 Aug. 0.0343 0.0302 0.0324
23:01-24:00, Wed., 13 Aug. 0.0353 0.0295 0.0323
22:01-23:00, Wed., 13 Aug. 0.0351 0.0288 0.0322
21:01-22:00, Wed., 13 Aug. 0.0353 0.0302 0.0327
20:01-21:00, Wed., 13 Aug. 0.0346 0.0300 0.0323
19:01-20:00, Wed., 13 Aug. 0.0350 0.0303 0.0325
18:01-19:00, Wed., 13 Aug. 0.0343 0.0293 0.0323
17:01-18:00, Wed., 13 Aug. 0.0344 0.0304 0.0323
16:01-17:00, Wed., 13 Aug. 0.0348 0.0299 0.0323
15:01-16:00, Wed., 13 Aug. 0.0346 0.0303 0.0322
14:01-15:00, Wed., 13 Aug. 0.0349 0.0304 0.0325
13:01-14:00, Wed., 13 Aug. 0.0346 0.0295 0.0324
12:01-13:00, Wed., 13 Aug. 0.0352 0.0304 0.0324
11:01-12:00, Wed., 13 Aug. 0.0346 0.0304 0.0324
10:01-11:00, Wed., 13 Aug. 0.0347 0.0300 0.0322
09:01-10:00, Wed., 13 Aug. 0.0349 0.0301 0.0323
08:01-09:00, Wed., 13 Aug. 0.0363 0.0301 0.0320
07:01-08:00, Wed., 13 Aug. 0.0349 0.0301 0.0322
06:01-07:00, Wed., 13 Aug. 0.0351 0.0299 0.0324
05:01-06:00, Wed., 13 Aug. 0.0343 0.0300 0.0320
04:01-05:00, Wed., 13 Aug. 0.0353 0.0306 0.0322
03:01-04:00, Wed., 13 Aug. 0.0348 0.0304 0.0324
02:01-03:00, Wed., 13 Aug. 0.0354 0.0301 0.0324
01:01-02:00, Wed., 13 Aug. 0.0346 0.0301 0.0325
00:01-01:00, Wed., 13 Aug. 0.0350 0.0308 0.0326
23:01-24:00, Tue., 12 Aug. 0.0353 0.0300 0.0327
22:01-23:00, Tue., 12 Aug. 0.0346 0.0293 0.0323
21:01-22:00, Tue., 12 Aug. 0.0369 0.0307 0.0339
20:01-21:00, Tue., 12 Aug. 0.0398 0.0337 0.0370
19:01-20:00, Tue., 12 Aug. 0.0395 0.0336 0.0369
18:01-19:00, Tue., 12 Aug. 0.0376 0.0312 0.0341
17:01-18:00, Tue., 12 Aug. 0.0369 0.0297 0.0327
16:01-17:00, Tue., 12 Aug. 0.0348 0.0304 0.0321
15:01-16:00, Tue., 12 Aug. 0.0349 0.0301 0.0321
14:01-15:00, Tue., 12 Aug. 0.0340 0.0296 0.0321
13:01-14:00, Tue., 12 Aug. 0.0343 0.0295 0.0320
12:01-13:00, Tue., 12 Aug. 0.0336 0.0299 0.0319
11:01-12:00, Tue., 12 Aug. 0.0332 0.0292 0.0314
10:01-11:00, Tue., 12 Aug. 0.0346 0.0292 0.0317
09:01-10:00, Tue., 12 Aug. 0.0339 0.0296 0.0314
08:01-09:00, Tue., 12 Aug. 0.0339 0.0299 0.0316
07:01-08:00, Tue., 12 Aug. 0.0346 0.0299 0.0316
06:01-07:00, Tue., 12 Aug. 0.0342 0.0296 0.0317
05:01-06:00, Tue., 12 Aug. 0.0341 0.0299 0.0320
04:01-05:00, Tue., 12 Aug. 0.0358 0.0304 0.0324
03:01-04:00, Tue., 12 Aug. 0.0341 0.0295 0.0317
02:01-03:00, Tue., 12 Aug. 0.0335 0.0295 0.0317
01:01-02:00, Tue., 12 Aug. 0.0337 0.0297 0.0316
00:01-01:00, Tue., 12 Aug. 0.0342 0.0301 0.0318
23:01-24:00, Mon., 11 Aug. 0.0342 0.0293 0.0315
22:01-23:00, Mon., 11 Aug. 0.0340 0.0292 0.0316
21:01-22:00, Mon., 11 Aug. 0.0335 0.0300 0.0317
20:01-21:00, Mon., 11 Aug. 0.0335 0.0297 0.0315
19:01-20:00, Mon., 11 Aug. 0.0343 0.0293 0.0318
18:01-19:00, Mon., 11 Aug. 0.0356 0.0297 0.0327
17:01-18:00, Mon., 11 Aug. 0.0368 0.0293 0.0324
16:01-17:00, Mon., 11 Aug. 0.0374 0.0306 0.0339
15:01-16:00, Mon., 11 Aug. 0.0420 0.0346 0.0381
14:01-15:00, Mon., 11 Aug. 0.0485 0.0401 0.0455
13:01-14:00, Mon., 11 Aug. 0.0503 0.0446 0.0471
12:01-13:00, Mon., 11 Aug. 0.0480 0.0367 0.0421
11:01-12:00, Mon., 11 Aug. 0.0500 0.0381 0.0443
10:01-11:00, Mon., 11 Aug. 0.0510 0.0368 0.0417
09:01-10:00, Mon., 11 Aug. 0.0409 0.0334 0.0376
08:01-09:00, Mon., 11 Aug. 0.0349 0.0297 0.0322
07:01-08:00, Mon., 11 Aug. 0.0355 0.0286 0.0317
06:01-07:00, Mon., 11 Aug. 0.0357 0.0304 0.0326
05:01-06:00, Mon., 11 Aug. 0.0363 0.0314 0.0339
04:01-05:00, Mon., 11 Aug. 0.0384 0.0327 0.0354
03:01-04:00, Mon., 11 Aug. 0.0382 0.0329 0.0353
02:01-03:00, Mon., 11 Aug. 0.0386 0.0335 0.0357
01:01-02:00, Mon., 11 Aug. 0.0362 0.0308 0.0335
00:01-01:00, Mon., 11 Aug. 0.0356 0.0294 0.0320
23:01-24:00, Sun., 10 Aug. 0.0341 0.0294 0.0316
22:01-23:00, Sun., 10 Aug. 0.0337 0.0293 0.0315
21:01-22:00, Sun., 10 Aug. 0.0336 0.0298 0.0317
20:01-21:00, Sun., 10 Aug. 0.0344 0.0297 0.0319
19:01-20:00, Sun., 10 Aug. 0.0359 0.0303 0.0333
18:01-19:00, Sun., 10 Aug. 0.0428 0.0320 0.0369
17:01-18:00, Sun., 10 Aug. 0.0434 0.0384 0.0412
16:01-17:00, Sun., 10 Aug. 0.0418 0.0362 0.0388
15:01-16:00, Sun., 10 Aug. 0.0380 0.0302 0.0352
14:01-15:00, Sun., 10 Aug. 0.0384 0.0324 0.0353
13:01-14:00, Sun., 10 Aug. 0.0368 0.0317 0.0343
12:01-13:00, Sun., 10 Aug. 0.0359 0.0311 0.0333
11:01-12:00, Sun., 10 Aug. 0.0402 0.0327 0.0363
10:01-11:00, Sun., 10 Aug. 0.0409 0.0360 0.0390
09:01-10:00, Sun., 10 Aug. 0.0450 0.0390 0.0424
08:01-09:00, Sun., 10 Aug. 0.0446 0.0351 0.0399
07:01-08:00, Sun., 10 Aug. 0.0384 0.0318 0.0345
06:01-07:00, Sun., 10 Aug. 0.0367 0.0309 0.0338
05:01-06:00, Sun., 10 Aug. 0.0362 0.0314 0.0345
04:01-05:00, Sun., 10 Aug. 0.0385 0.0329 0.0351
03:01-04:00, Sun., 10 Aug. 0.0381 0.0325 0.0358
02:01-03:00, Sun., 10 Aug. 0.0367 0.0318 0.0339
01:01-02:00, Sun., 10 Aug. 0.0362 0.0321 0.0340
00:01-01:00, Sun., 10 Aug. 0.0361 0.0314 0.0337
23:01-24:00, Sat., 09 Aug. 0.0368 0.0318 0.0338
22:01-23:00, Sat., 09 Aug. 0.0373 0.0318 0.0341
21:01-22:00, Sat., 09 Aug. 0.0366 0.0315 0.0340
20:01-21:00, Sat., 09 Aug. 0.0363 0.0320 0.0338
19:01-20:00, Sat., 09 Aug. 0.0367 0.0315 0.0338
18:01-19:00, Sat., 09 Aug. 0.0361 0.0315 0.0339
17:01-18:00, Sat., 09 Aug. 0.0363 0.0318 0.0338
16:01-17:00, Sat., 09 Aug. 0.0362 0.0311 0.0336
15:01-16:00, Sat., 09 Aug. 0.0358 0.0308 0.0338
14:01-15:00, Sat., 09 Aug. 0.0353 0.0319 0.0338
13:01-14:00, Sat., 09 Aug. 0.0356 0.0313 0.0340
12:01-13:00, Sat., 09 Aug. 0.0368 0.0313 0.0341
11:01-12:00, Sat., 09 Aug. 0.0357 0.0301 0.0340
10:01-11:00, Sat., 09 Aug. 0.0367 0.0322 0.0338
09:01-10:00, Sat., 09 Aug. 0.0355 0.0321 0.0337
08:01-09:00, Sat., 09 Aug. 0.0368 0.0315 0.0339
07:01-08:00, Sat., 09 Aug. 0.0359 0.0318 0.0339
06:01-07:00, Sat., 09 Aug. 0.0364 0.0317 0.0338
05:01-06:00, Sat., 09 Aug. 0.0367 0.0314 0.0340
04:01-05:00, Sat., 09 Aug. 0.0367 0.0320 0.0339
03:01-04:00, Sat., 09 Aug. 0.0366 0.0308 0.0338
02:01-03:00, Sat., 09 Aug. 0.0362 0.0320 0.0341
01:01-02:00, Sat., 09 Aug. 0.0365 0.0321 0.0339
00:01-01:00, Sat., 09 Aug. 0.0367 0.0317 0.0339
23:01-24:00, Fri., 08 Aug. 0.0366 0.0304 0.0334
22:01-23:00, Fri., 08 Aug. 0.0358 0.0316 0.0337
21:01-22:00, Fri., 08 Aug. 0.0365 0.0320 0.0339
20:01-21:00, Fri., 08 Aug. 0.0364 0.0316 0.0342
19:01-20:00, Fri., 08 Aug. 0.0362 0.0318 0.0339
18:01-19:00, Fri., 08 Aug. 0.0364 0.0315 0.0342
17:01-18:00, Fri., 08 Aug. 0.0363 0.0319 0.0340