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
17:01-18:00, Sat., 13 Dec. 0.0339 0.0286 0.0315
16:01-17:00, Sat., 13 Dec. 0.0339 0.0295 0.0315
15:01-16:00, Sat., 13 Dec. 0.0336 0.0284 0.0316
14:01-15:00, Sat., 13 Dec. 0.0344 0.0276 0.0316
13:01-14:00, Sat., 13 Dec. 0.0337 0.0297 0.0315
12:01-13:00, Sat., 13 Dec. 0.0339 0.0290 0.0317
11:01-12:00, Sat., 13 Dec. 0.0347 0.0297 0.0318
10:01-11:00, Sat., 13 Dec. 0.0340 0.0297 0.0317
09:01-10:00, Sat., 13 Dec. 0.0337 0.0294 0.0315
08:01-09:00, Sat., 13 Dec. 0.0343 0.0294 0.0317
07:01-08:00, Sat., 13 Dec. 0.0338 0.0286 0.0313
06:01-07:00, Sat., 13 Dec. 0.0335 0.0287 0.0314
05:01-06:00, Sat., 13 Dec. 0.0339 0.0290 0.0315
04:01-05:00, Sat., 13 Dec. 0.0338 0.0292 0.0316
03:01-04:00, Sat., 13 Dec. 0.0332 0.0297 0.0315
02:01-03:00, Sat., 13 Dec. 0.0343 0.0291 0.0315
01:01-02:00, Sat., 13 Dec. 0.0339 0.0294 0.0313
00:01-01:00, Sat., 13 Dec. 0.0339 0.0293 0.0316
23:01-24:00, Fri., 12 Dec. 0.0338 0.0298 0.0314
22:01-23:00, Fri., 12 Dec. 0.0332 0.0290 0.0312
21:01-22:00, Fri., 12 Dec. 0.0334 0.0285 0.0311
20:01-21:00, Fri., 12 Dec. 0.0345 0.0288 0.0314
19:01-20:00, Fri., 12 Dec. 0.0345 0.0288 0.0312
18:01-19:00, Fri., 12 Dec. 0.0338 0.0290 0.0314
17:01-18:00, Fri., 12 Dec. 0.0337 0.0285 0.0315
16:01-17:00, Fri., 12 Dec. 0.0336 0.0286 0.0315
15:01-16:00, Fri., 12 Dec. 0.0345 0.0296 0.0317
14:01-15:00, Fri., 12 Dec. 0.0342 0.0295 0.0316
13:01-14:00, Fri., 12 Dec. 0.0345 0.0297 0.0318
12:01-13:00, Fri., 12 Dec. 0.0339 0.0287 0.0318
11:01-12:00, Fri., 12 Dec. 0.0347 0.0300 0.0319
10:01-11:00, Fri., 12 Dec. 0.0336 0.0295 0.0317
09:01-10:00, Fri., 12 Dec. 0.0343 0.0295 0.0319
08:01-09:00, Fri., 12 Dec. 0.0360 0.0303 0.0321
07:01-08:00, Fri., 12 Dec. 0.0341 0.0304 0.0321
06:01-07:00, Fri., 12 Dec. 0.0349 0.0297 0.0323
05:01-06:00, Fri., 12 Dec. 0.0351 0.0296 0.0326
04:01-05:00, Fri., 12 Dec. 0.0344 0.0307 0.0327
03:01-04:00, Fri., 12 Dec. 0.0344 0.0304 0.0327
02:01-03:00, Fri., 12 Dec. 0.0346 0.0302 0.0327
01:01-02:00, Fri., 12 Dec. 0.0347 0.0306 0.0325
00:01-01:00, Fri., 12 Dec. 0.0345 0.0298 0.0330
23:01-24:00, Thu., 11 Dec. 0.0351 0.0307 0.0327
22:01-23:00, Thu., 11 Dec. 0.0356 0.0300 0.0326
21:01-22:00, Thu., 11 Dec. 0.0350 0.0304 0.0327
20:01-21:00, Thu., 11 Dec. 0.0354 0.0303 0.0326
19:01-20:00, Thu., 11 Dec. 0.0346 0.0306 0.0327
18:01-19:00, Thu., 11 Dec. 0.0348 0.0303 0.0323
17:01-18:00, Thu., 11 Dec. 0.0353 0.0301 0.0324
16:01-17:00, Thu., 11 Dec. 0.0353 0.0301 0.0327
15:01-16:00, Thu., 11 Dec. 0.0349 0.0293 0.0324
14:01-15:00, Thu., 11 Dec. 0.0353 0.0301 0.0326
13:01-14:00, Thu., 11 Dec. 0.0350 0.0302 0.0326
12:01-13:00, Thu., 11 Dec. 0.0349 0.0302 0.0325
11:01-12:00, Thu., 11 Dec. 0.0357 0.0307 0.0328
10:01-11:00, Thu., 11 Dec. 0.0350 0.0301 0.0326
09:01-10:00, Thu., 11 Dec. 0.0351 0.0307 0.0325
08:01-09:00, Thu., 11 Dec. 0.0344 0.0311 0.0329
07:01-08:00, Thu., 11 Dec. 0.0346 0.0305 0.0327
06:01-07:00, Thu., 11 Dec. 0.0349 0.0315 0.0328
05:01-06:00, Thu., 11 Dec. 0.0356 0.0306 0.0326
04:01-05:00, Thu., 11 Dec. 0.0351 0.0306 0.0328
03:01-04:00, Thu., 11 Dec. 0.0347 0.0295 0.0327
02:01-03:00, Thu., 11 Dec. 0.0353 0.0305 0.0323
01:01-02:00, Thu., 11 Dec. 0.0354 0.0307 0.0326
00:01-01:00, Thu., 11 Dec. 0.0340 0.0295 0.0321
23:01-24:00, Wed., 10 Dec. 0.0345 0.0302 0.0322
22:01-23:00, Wed., 10 Dec. 0.0338 0.0297 0.0320
21:01-22:00, Wed., 10 Dec. 0.0350 0.0300 0.0322
20:01-21:00, Wed., 10 Dec. 0.0346 0.0289 0.0319
19:01-20:00, Wed., 10 Dec. 0.0337 0.0298 0.0321
18:01-19:00, Wed., 10 Dec. 0.0351 0.0303 0.0325
17:01-18:00, Wed., 10 Dec. 0.0354 0.0304 0.0329
16:01-17:00, Wed., 10 Dec. 0.0349 0.0298 0.0325
15:01-16:00, Wed., 10 Dec. 0.0355 0.0301 0.0327
14:01-15:00, Wed., 10 Dec. 0.0354 0.0312 0.0331
13:01-14:00, Wed., 10 Dec. 0.0356 0.0303 0.0327
12:01-13:00, Wed., 10 Dec. 0.0356 0.0315 0.0334
11:01-12:00, Wed., 10 Dec. 0.0353 0.0318 0.0335
10:01-11:00, Wed., 10 Dec. 0.0359 0.0315 0.0338
09:01-10:00, Wed., 10 Dec. 0.0350 0.0306 0.0328
08:01-09:00, Wed., 10 Dec. 0.0363 0.0299 0.0327
07:01-08:00, Wed., 10 Dec. 0.0354 0.0301 0.0325
06:01-07:00, Wed., 10 Dec. 0.0352 0.0300 0.0326
05:01-06:00, Wed., 10 Dec. 0.0344 0.0295 0.0322
04:01-05:00, Wed., 10 Dec. 0.0341 0.0295 0.0321
03:01-04:00, Wed., 10 Dec. 0.0343 0.0291 0.0323
02:01-03:00, Wed., 10 Dec. 0.0343 0.0306 0.0324
01:01-02:00, Wed., 10 Dec. 0.0350 0.0299 0.0321
00:01-01:00, Wed., 10 Dec. 0.0349 0.0297 0.0322
23:01-24:00, Tue., 09 Dec. 0.0348 0.0301 0.0324
22:01-23:00, Tue., 09 Dec. 0.0349 0.0298 0.0322
21:01-22:00, Tue., 09 Dec. 0.0349 0.0297 0.0324
20:01-21:00, Tue., 09 Dec. 0.0343 0.0301 0.0324
19:01-20:00, Tue., 09 Dec. 0.0346 0.0297 0.0323
18:01-19:00, Tue., 09 Dec. 0.0354 0.0301 0.0324
17:01-18:00, Tue., 09 Dec. 0.0356 0.0306 0.0328
16:01-17:00, Tue., 09 Dec. 0.0349 0.0304 0.0325
15:01-16:00, Tue., 09 Dec. 0.0357 0.0302 0.0326
14:01-15:00, Tue., 09 Dec. 0.0355 0.0303 0.0328
13:01-14:00, Tue., 09 Dec. 0.0348 0.0301 0.0327
12:01-13:00, Tue., 09 Dec. 0.0353 0.0299 0.0328
11:01-12:00, Tue., 09 Dec. 0.0359 0.0307 0.0333
10:01-11:00, Tue., 09 Dec. 0.0349 0.0317 0.0331
09:01-10:00, Tue., 09 Dec. 0.0349 0.0305 0.0326
08:01-09:00, Tue., 09 Dec. 0.0349 0.0306 0.0325
07:01-08:00, Tue., 09 Dec. 0.0345 0.0304 0.0325
06:01-07:00, Tue., 09 Dec. 0.0349 0.0307 0.0325
05:01-06:00, Tue., 09 Dec. 0.0348 0.0304 0.0328
04:01-05:00, Tue., 09 Dec. 0.0349 0.0307 0.0329
03:01-04:00, Tue., 09 Dec. 0.0356 0.0310 0.0328
02:01-03:00, Tue., 09 Dec. 0.0356 0.0304 0.0329
01:01-02:00, Tue., 09 Dec. 0.0350 0.0302 0.0328
00:01-01:00, Tue., 09 Dec. 0.0344 0.0301 0.0326
23:01-24:00, Mon., 08 Dec. 0.0351 0.0302 0.0325
22:01-23:00, Mon., 08 Dec. 0.0345 0.0306 0.0325
21:01-22:00, Mon., 08 Dec. 0.0348 0.0306 0.0326
20:01-21:00, Mon., 08 Dec. 0.0350 0.0300 0.0327
19:01-20:00, Mon., 08 Dec. 0.0351 0.0312 0.0329
18:01-19:00, Mon., 08 Dec. 0.0350 0.0297 0.0326
17:01-18:00, Mon., 08 Dec. 0.0353 0.0305 0.0324
16:01-17:00, Mon., 08 Dec. 0.0354 0.0309 0.0326
15:01-16:00, Mon., 08 Dec. 0.0353 0.0308 0.0328
14:01-15:00, Mon., 08 Dec. 0.0349 0.0307 0.0326
13:01-14:00, Mon., 08 Dec. 0.0350 0.0302 0.0326
12:01-13:00, Mon., 08 Dec. 0.0350 0.0310 0.0331
11:01-12:00, Mon., 08 Dec. 0.0361 0.0301 0.0331
10:01-11:00, Mon., 08 Dec. 0.0360 0.0301 0.0336
09:01-10:00, Mon., 08 Dec. 0.0353 0.0304 0.0334
08:01-09:00, Mon., 08 Dec. 0.0353 0.0302 0.0334
07:01-08:00, Mon., 08 Dec. 0.0356 0.0316 0.0334
06:01-07:00, Mon., 08 Dec. 0.0360 0.0308 0.0332
05:01-06:00, Mon., 08 Dec. 0.0358 0.0312 0.0332
04:01-05:00, Mon., 08 Dec. 0.0357 0.0310 0.0333
03:01-04:00, Mon., 08 Dec. 0.0365 0.0303 0.0331
02:01-03:00, Mon., 08 Dec. 0.0353 0.0304 0.0330
01:01-02:00, Mon., 08 Dec. 0.0353 0.0311 0.0328
00:01-01:00, Mon., 08 Dec. 0.0343 0.0308 0.0326
23:01-24:00, Sun., 07 Dec. 0.0349 0.0303 0.0322
22:01-23:00, Sun., 07 Dec. 0.0351 0.0301 0.0322
21:01-22:00, Sun., 07 Dec. 0.0339 0.0300 0.0321
20:01-21:00, Sun., 07 Dec. 0.0352 0.0296 0.0321
19:01-20:00, Sun., 07 Dec. 0.0343 0.0302 0.0321
18:01-19:00, Sun., 07 Dec. 0.0350 0.0293 0.0321
17:01-18:00, Sun., 07 Dec. 0.0344 0.0274 0.0318
16:01-17:00, Sun., 07 Dec. 0.0347 0.0299 0.0323
15:01-16:00, Sun., 07 Dec. 0.0346 0.0299 0.0322
14:01-15:00, Sun., 07 Dec. 0.0343 0.0303 0.0323
13:01-14:00, Sun., 07 Dec. 0.0341 0.0303 0.0323
12:01-13:00, Sun., 07 Dec. 0.0355 0.0304 0.0324
11:01-12:00, Sun., 07 Dec. 0.0358 0.0311 0.0333
10:01-11:00, Sun., 07 Dec. 0.0355 0.0314 0.0335
09:01-10:00, Sun., 07 Dec. 0.0354 0.0316 0.0337
08:01-09:00, Sun., 07 Dec. 0.0364 0.0311 0.0341
07:01-08:00, Sun., 07 Dec. 0.0370 0.0314 0.0342
06:01-07:00, Sun., 07 Dec. 0.0356 0.0301 0.0325
05:01-06:00, Sun., 07 Dec. 0.0351 0.0301 0.0331
04:01-05:00, Sun., 07 Dec. 0.0349 0.0308 0.0329
03:01-04:00, Sun., 07 Dec. 0.0359 0.0305 0.0327
02:01-03:00, Sun., 07 Dec. 0.0364 0.0308 0.0329
01:01-02:00, Sun., 07 Dec. 0.0349 0.0301 0.0325
00:01-01:00, Sun., 07 Dec. 0.0349 0.0303 0.0327
23:01-24:00, Sat., 06 Dec. 0.0349 0.0304 0.0326
22:01-23:00, Sat., 06 Dec. 0.0349 0.0290 0.0325
21:01-22:00, Sat., 06 Dec. 0.0339 0.0294 0.0320
20:01-21:00, Sat., 06 Dec. 0.0351 0.0293 0.0322
19:01-20:00, Sat., 06 Dec. 0.0349 0.0304 0.0323
18:01-19:00, Sat., 06 Dec. 0.0341 0.0295 0.0321
17:01-18:00, Sat., 06 Dec. 0.0336 0.0293 0.0318
16:01-17:00, Sat., 06 Dec. 0.0340 0.0301 0.0320
15:01-16:00, Sat., 06 Dec. 0.0339 0.0302 0.0322
14:01-15:00, Sat., 06 Dec. 0.0338 0.0293 0.0320
13:01-14:00, Sat., 06 Dec. 0.0341 0.0301 0.0322
12:01-13:00, Sat., 06 Dec. 0.0344 0.0299 0.0323
11:01-12:00, Sat., 06 Dec. 0.0347 0.0304 0.0324
10:01-11:00, Sat., 06 Dec. 0.0349 0.0291 0.0322
09:01-10:00, Sat., 06 Dec. 0.0349 0.0302 0.0327
08:01-09:00, Sat., 06 Dec. 0.0348 0.0308 0.0328
07:01-08:00, Sat., 06 Dec. 0.0344 0.0304 0.0324
06:01-07:00, Sat., 06 Dec. 0.0349 0.0300 0.0323
05:01-06:00, Sat., 06 Dec. 0.0346 0.0296 0.0322
04:01-05:00, Sat., 06 Dec. 0.0353 0.0290 0.0323
03:01-04:00, Sat., 06 Dec. 0.0345 0.0294 0.0322
02:01-03:00, Sat., 06 Dec. 0.0349 0.0303 0.0323
01:01-02:00, Sat., 06 Dec. 0.0341 0.0306 0.0325
00:01-01:00, Sat., 06 Dec. 0.0341 0.0308 0.0322
23:01-24:00, Fri., 05 Dec. 0.0344 0.0301 0.0323
22:01-23:00, Fri., 05 Dec. 0.0339 0.0294 0.0321
21:01-22:00, Fri., 05 Dec. 0.0342 0.0297 0.0320
20:01-21:00, Fri., 05 Dec. 0.0341 0.0301 0.0321
19:01-20:00, Fri., 05 Dec. 0.0349 0.0294 0.0323
18:01-19:00, Fri., 05 Dec. 0.0346 0.0297 0.0322
17:01-18:00, Fri., 05 Dec. 0.0354 0.0300 0.0323
16:01-17:00, Fri., 05 Dec. 0.0343 0.0301 0.0323
15:01-16:00, Fri., 05 Dec. 0.0353 0.0300 0.0322
14:01-15:00, Fri., 05 Dec. 0.0345 0.0303 0.0324
13:01-14:00, Fri., 05 Dec. 0.0345 0.0297 0.0324
12:01-13:00, Fri., 05 Dec. 0.0355 0.0297 0.0323
11:01-12:00, Fri., 05 Dec. 0.0347 0.0303 0.0328
10:01-11:00, Fri., 05 Dec. 0.0353 0.0298 0.0327
09:01-10:00, Fri., 05 Dec. 0.0348 0.0305 0.0325
08:01-09:00, Fri., 05 Dec. 0.0349 0.0304 0.0328
07:01-08:00, Fri., 05 Dec. 0.0350 0.0300 0.0326
06:01-07:00, Fri., 05 Dec. 0.0356 0.0301 0.0327
05:01-06:00, Fri., 05 Dec. 0.0354 0.0310 0.0326
04:01-05:00, Fri., 05 Dec. 0.0346 0.0295 0.0323
03:01-04:00, Fri., 05 Dec. 0.0346 0.0300 0.0321
02:01-03:00, Fri., 05 Dec. 0.0336 0.0297 0.0318
01:01-02:00, Fri., 05 Dec. 0.0343 0.0297 0.0320
00:01-01:00, Fri., 05 Dec. 0.0350 0.0298 0.0318
23:01-24:00, Thu., 04 Dec. 0.0346 0.0287 0.0318
22:01-23:00, Thu., 04 Dec. 0.0341 0.0294 0.0317
21:01-22:00, Thu., 04 Dec. 0.0341 0.0297 0.0319
20:01-21:00, Thu., 04 Dec. 0.0342 0.0286 0.0318
19:01-20:00, Thu., 04 Dec. 0.0349 0.0287 0.0315
18:01-19:00, Thu., 04 Dec. 0.0338 0.0297 0.0318
17:01-18:00, Thu., 04 Dec. 0.0349 0.0293 0.0319
16:01-17:00, Thu., 04 Dec. 0.0345 0.0297 0.0319
15:01-16:00, Thu., 04 Dec. 0.0342 0.0300 0.0322
14:01-15:00, Thu., 04 Dec. 0.0347 0.0303 0.0321
13:01-14:00, Thu., 04 Dec. 0.0340 0.0301 0.0322
12:01-13:00, Thu., 04 Dec. 0.0343 0.0295 0.0323
11:01-12:00, Thu., 04 Dec. 0.0349 0.0306 0.0323
10:01-11:00, Thu., 04 Dec. 0.0348 0.0301 0.0323
09:01-10:00, Thu., 04 Dec. 0.0354 0.0303 0.0323
08:01-09:00, Thu., 04 Dec. 0.0356 0.0300 0.0322
07:01-08:00, Thu., 04 Dec. 0.0352 0.0297 0.0323
06:01-07:00, Thu., 04 Dec. 0.0340 0.0296 0.0319
05:01-06:00, Thu., 04 Dec. 0.0350 0.0299 0.0320
04:01-05:00, Thu., 04 Dec. 0.0336 0.0297 0.0317
03:01-04:00, Thu., 04 Dec. 0.0341 0.0298 0.0320
02:01-03:00, Thu., 04 Dec. 0.0343 0.0285 0.0322
01:01-02:00, Thu., 04 Dec. 0.0351 0.0302 0.0322
00:01-01:00, Thu., 04 Dec. 0.0367 0.0307 0.0335
23:01-24:00, Wed., 03 Dec. 0.0415 0.0339 0.0377
22:01-23:00, Wed., 03 Dec. 0.0462 0.0318 0.0398
21:01-22:00, Wed., 03 Dec. 0.0342 0.0301 0.0323
20:01-21:00, Wed., 03 Dec. 0.0357 0.0304 0.0328
19:01-20:00, Wed., 03 Dec. 0.0353 0.0308 0.0332
18:01-19:00, Wed., 03 Dec. 0.0356 0.0307 0.0334