Radiation doses in the air / Measurement results by the hour (Kodaira)

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
04:01-05:00, Thu., 25 Apr. 0.0351 0.0301 0.0330
03:01-04:00, Thu., 25 Apr. 0.0356 0.0298 0.0329
02:01-03:00, Thu., 25 Apr. 0.0349 0.0302 0.0329
01:01-02:00, Thu., 25 Apr. 0.0358 0.0305 0.0329
00:01-01:00, Thu., 25 Apr. 0.0371 0.0327 0.0347
23:01-24:00, Wed., 24 Apr. 0.0404 0.0343 0.0371
22:01-23:00, Wed., 24 Apr. 0.0407 0.0357 0.0383
21:01-22:00, Wed., 24 Apr. 0.0411 0.0348 0.0382
20:01-21:00, Wed., 24 Apr. 0.0396 0.0345 0.0370
19:01-20:00, Wed., 24 Apr. 0.0381 0.0332 0.0358
18:01-19:00, Wed., 24 Apr. 0.0379 0.0345 0.0358
17:01-18:00, Wed., 24 Apr. 0.0376 0.0328 0.0354
16:01-17:00, Wed., 24 Apr. 0.0381 0.0332 0.0357
15:01-16:00, Wed., 24 Apr. 0.0391 0.0335 0.0363
14:01-15:00, Wed., 24 Apr. 0.0386 0.0328 0.0355
13:01-14:00, Wed., 24 Apr. 0.0405 0.0340 0.0373
12:01-13:00, Wed., 24 Apr. 0.0408 0.0363 0.0384
11:01-12:00, Wed., 24 Apr. 0.0397 0.0338 0.0375
10:01-11:00, Wed., 24 Apr. 0.0380 0.0343 0.0358
09:01-10:00, Wed., 24 Apr. 0.0390 0.0318 0.0355
08:01-09:00, Wed., 24 Apr. 0.0376 0.0322 0.0348
07:01-08:00, Wed., 24 Apr. 0.0409 0.0337 0.0370
06:01-07:00, Wed., 24 Apr. 0.0423 0.0373 0.0397
05:01-06:00, Wed., 24 Apr. 0.0436 0.0374 0.0406
04:01-05:00, Wed., 24 Apr. 0.0398 0.0324 0.0362
03:01-04:00, Wed., 24 Apr. 0.0343 0.0297 0.0324
02:01-03:00, Wed., 24 Apr. 0.0348 0.0306 0.0327
01:01-02:00, Wed., 24 Apr. 0.0347 0.0303 0.0325
00:01-01:00, Wed., 24 Apr. 0.0352 0.0305 0.0330
23:01-24:00, Tue., 23 Apr. 0.0347 0.0309 0.0329
22:01-23:00, Tue., 23 Apr. 0.0353 0.0311 0.0333
21:01-22:00, Tue., 23 Apr. 0.0353 0.0304 0.0333
20:01-21:00, Tue., 23 Apr. 0.0369 0.0308 0.0341
19:01-20:00, Tue., 23 Apr. 0.0391 0.0336 0.0369
18:01-19:00, Tue., 23 Apr. 0.0409 0.0335 0.0373
17:01-18:00, Tue., 23 Apr. 0.0363 0.0311 0.0332
16:01-17:00, Tue., 23 Apr. 0.0351 0.0304 0.0331
15:01-16:00, Tue., 23 Apr. 0.0359 0.0316 0.0333
14:01-15:00, Tue., 23 Apr. 0.0362 0.0303 0.0335
13:01-14:00, Tue., 23 Apr. 0.0351 0.0297 0.0328
12:01-13:00, Tue., 23 Apr. 0.0355 0.0311 0.0331
11:01-12:00, Tue., 23 Apr. 0.0355 0.0308 0.0329
10:01-11:00, Tue., 23 Apr. 0.0356 0.0313 0.0329
09:01-10:00, Tue., 23 Apr. 0.0353 0.0310 0.0332
08:01-09:00, Tue., 23 Apr. 0.0362 0.0311 0.0334
07:01-08:00, Tue., 23 Apr. 0.0360 0.0311 0.0336
06:01-07:00, Tue., 23 Apr. 0.0360 0.0296 0.0337
05:01-06:00, Tue., 23 Apr. 0.0360 0.0299 0.0332
04:01-05:00, Tue., 23 Apr. 0.0357 0.0313 0.0332
03:01-04:00, Tue., 23 Apr. 0.0347 0.0314 0.0331
02:01-03:00, Tue., 23 Apr. 0.0352 0.0306 0.0328
01:01-02:00, Tue., 23 Apr. 0.0349 0.0301 0.0332
00:01-01:00, Tue., 23 Apr. 0.0352 0.0304 0.0329
23:01-24:00, Mon., 22 Apr. 0.0355 0.0310 0.0332
22:01-23:00, Mon., 22 Apr. 0.0362 0.0309 0.0332
21:01-22:00, Mon., 22 Apr. 0.0352 0.0305 0.0329
20:01-21:00, Mon., 22 Apr. 0.0353 0.0308 0.0331
19:01-20:00, Mon., 22 Apr. 0.0355 0.0309 0.0334
18:01-19:00, Mon., 22 Apr. 0.0350 0.0309 0.0332
17:01-18:00, Mon., 22 Apr. 0.0356 0.0307 0.0330
16:01-17:00, Mon., 22 Apr. 0.0349 0.0310 0.0331
15:01-16:00, Mon., 22 Apr. 0.0348 0.0308 0.0328
14:01-15:00, Mon., 22 Apr. 0.0346 0.0307 0.0328
13:01-14:00, Mon., 22 Apr. 0.0362 0.0299 0.0330
12:01-13:00, Mon., 22 Apr. 0.0354 0.0306 0.0331
11:01-12:00, Mon., 22 Apr. 0.0360 0.0298 0.0333
10:01-11:00, Mon., 22 Apr. 0.0370 0.0324 0.0350
09:01-10:00, Mon., 22 Apr. 0.0389 0.0340 0.0365
08:01-09:00, Mon., 22 Apr. 0.0398 0.0352 0.0376
07:01-08:00, Mon., 22 Apr. 0.0387 0.0330 0.0361
06:01-07:00, Mon., 22 Apr. 0.0401 0.0341 0.0371
05:01-06:00, Mon., 22 Apr. 0.0416 0.0350 0.0383
04:01-05:00, Mon., 22 Apr. 0.0447 0.0387 0.0416
03:01-04:00, Mon., 22 Apr. 0.0456 0.0382 0.0411
02:01-03:00, Mon., 22 Apr. 0.0446 0.0360 0.0405
01:01-02:00, Mon., 22 Apr. 0.0478 0.0406 0.0445
00:01-01:00, Mon., 22 Apr. 0.0478 0.0427 0.0448
23:01-24:00, Sun., 21 Apr. 0.0482 0.0411 0.0450
22:01-23:00, Sun., 21 Apr. 0.0476 0.0419 0.0448
21:01-22:00, Sun., 21 Apr. 0.0463 0.0405 0.0431
20:01-21:00, Sun., 21 Apr. 0.0454 0.0393 0.0431
19:01-20:00, Sun., 21 Apr. 0.0447 0.0392 0.0420
18:01-19:00, Sun., 21 Apr. 0.0414 0.0330 0.0364
17:01-18:00, Sun., 21 Apr. 0.0360 0.0313 0.0340
16:01-17:00, Sun., 21 Apr. 0.0386 0.0329 0.0353
15:01-16:00, Sun., 21 Apr. 0.0416 0.0351 0.0383
14:01-15:00, Sun., 21 Apr. 0.0397 0.0315 0.0350
13:01-14:00, Sun., 21 Apr. 0.0351 0.0306 0.0333
12:01-13:00, Sun., 21 Apr. 0.0366 0.0304 0.0334
11:01-12:00, Sun., 21 Apr. 0.0362 0.0306 0.0333
10:01-11:00, Sun., 21 Apr. 0.0354 0.0303 0.0333
09:01-10:00, Sun., 21 Apr. 0.0362 0.0311 0.0335
08:01-09:00, Sun., 21 Apr. 0.0362 0.0304 0.0338
07:01-08:00, Sun., 21 Apr. 0.0368 0.0321 0.0343
06:01-07:00, Sun., 21 Apr. 0.0358 0.0314 0.0336
05:01-06:00, Sun., 21 Apr. 0.0360 0.0312 0.0336
04:01-05:00, Sun., 21 Apr. 0.0361 0.0308 0.0340
03:01-04:00, Sun., 21 Apr. 0.0364 0.0318 0.0338
02:01-03:00, Sun., 21 Apr. 0.0359 0.0316 0.0338
01:01-02:00, Sun., 21 Apr. 0.0359 0.0322 0.0338
00:01-01:00, Sun., 21 Apr. 0.0364 0.0300 0.0339
23:01-24:00, Sat., 20 Apr. 0.0361 0.0319 0.0337
22:01-23:00, Sat., 20 Apr. 0.0356 0.0310 0.0334
21:01-22:00, Sat., 20 Apr. 0.0356 0.0315 0.0338
20:01-21:00, Sat., 20 Apr. 0.0355 0.0309 0.0334
19:01-20:00, Sat., 20 Apr. 0.0349 0.0308 0.0332
18:01-19:00, Sat., 20 Apr. 0.0358 0.0308 0.0331
17:01-18:00, Sat., 20 Apr. 0.0350 0.0304 0.0333
16:01-17:00, Sat., 20 Apr. 0.0353 0.0306 0.0331
15:01-16:00, Sat., 20 Apr. 0.0360 0.0315 0.0338
14:01-15:00, Sat., 20 Apr. 0.0362 0.0310 0.0336
13:01-14:00, Sat., 20 Apr. 0.0353 0.0306 0.0337
12:01-13:00, Sat., 20 Apr. 0.0363 0.0318 0.0337
11:01-12:00, Sat., 20 Apr. 0.0359 0.0309 0.0335
10:01-11:00, Sat., 20 Apr. 0.0363 0.0315 0.0337
09:01-10:00, Sat., 20 Apr. 0.0367 0.0315 0.0337
08:01-09:00, Sat., 20 Apr. 0.0356 0.0305 0.0336
07:01-08:00, Sat., 20 Apr. 0.0367 0.0315 0.0334
06:01-07:00, Sat., 20 Apr. 0.0361 0.0317 0.0342
05:01-06:00, Sat., 20 Apr. 0.0365 0.0311 0.0344
04:01-05:00, Sat., 20 Apr. 0.0370 0.0311 0.0341
03:01-04:00, Sat., 20 Apr. 0.0363 0.0317 0.0343
02:01-03:00, Sat., 20 Apr. 0.0367 0.0313 0.0343
01:01-02:00, Sat., 20 Apr. 0.0370 0.0310 0.0343
00:01-01:00, Sat., 20 Apr. 0.0363 0.0314 0.0340
23:01-24:00, Fri., 19 Apr. 0.0357 0.0317 0.0339
22:01-23:00, Fri., 19 Apr. 0.0356 0.0311 0.0335
21:01-22:00, Fri., 19 Apr. 0.0371 0.0311 0.0334
20:01-21:00, Fri., 19 Apr. 0.0353 0.0312 0.0334
19:01-20:00, Fri., 19 Apr. 0.0349 0.0310 0.0333
18:01-19:00, Fri., 19 Apr. 0.0361 0.0318 0.0336
17:01-18:00, Fri., 19 Apr. 0.0360 0.0307 0.0332
16:01-17:00, Fri., 19 Apr. 0.0352 0.0312 0.0333
15:01-16:00, Fri., 19 Apr. 0.0364 0.0316 0.0338
14:01-15:00, Fri., 19 Apr. 0.0361 0.0318 0.0335
13:01-14:00, Fri., 19 Apr. 0.0360 0.0308 0.0338
12:01-13:00, Fri., 19 Apr. 0.0364 0.0317 0.0336
11:01-12:00, Fri., 19 Apr. 0.0356 0.0316 0.0336
10:01-11:00, Fri., 19 Apr. 0.0358 0.0314 0.0337
09:01-10:00, Fri., 19 Apr. 0.0359 0.0310 0.0337
08:01-09:00, Fri., 19 Apr. 0.0362 0.0315 0.0337
07:01-08:00, Fri., 19 Apr. 0.0366 0.0309 0.0338
06:01-07:00, Fri., 19 Apr. 0.0358 0.0315 0.0336
05:01-06:00, Fri., 19 Apr. 0.0367 0.0315 0.0336
04:01-05:00, Fri., 19 Apr. 0.0363 0.0315 0.0338
03:01-04:00, Fri., 19 Apr. 0.0360 0.0317 0.0338
02:01-03:00, Fri., 19 Apr. 0.0363 0.0315 0.0343
01:01-02:00, Fri., 19 Apr. 0.0382 0.0338 0.0358
00:01-01:00, Fri., 19 Apr. 0.0445 0.0347 0.0404
23:01-24:00, Thu., 18 Apr. 0.0538 0.0446 0.0494
22:01-23:00, Thu., 18 Apr. 0.0515 0.0431 0.0466
21:01-22:00, Thu., 18 Apr. 0.0459 0.0341 0.0389
20:01-21:00, Thu., 18 Apr. 0.0383 0.0327 0.0354
19:01-20:00, Thu., 18 Apr. 0.0367 0.0310 0.0341
18:01-19:00, Thu., 18 Apr. 0.0367 0.0315 0.0338
17:01-18:00, Thu., 18 Apr. 0.0367 0.0315 0.0338
16:01-17:00, Thu., 18 Apr. 0.0369 0.0316 0.0337
15:01-16:00, Thu., 18 Apr. 0.0357 0.0311 0.0337
14:01-15:00, Thu., 18 Apr. 0.0368 0.0319 0.0337
13:01-14:00, Thu., 18 Apr. 0.0361 0.0309 0.0335
12:01-13:00, Thu., 18 Apr. 0.0359 0.0311 0.0334
11:01-12:00, Thu., 18 Apr. 0.0362 0.0306 0.0333
10:01-11:00, Thu., 18 Apr. 0.0356 0.0311 0.0336
09:01-10:00, Thu., 18 Apr. 0.0356 0.0306 0.0337
08:01-09:00, Thu., 18 Apr. 0.0365 0.0311 0.0339
07:01-08:00, Thu., 18 Apr. 0.0370 0.0302 0.0340
06:01-07:00, Thu., 18 Apr. 0.0363 0.0312 0.0339
05:01-06:00, Thu., 18 Apr. 0.0358 0.0316 0.0338
04:01-05:00, Thu., 18 Apr. 0.0360 0.0314 0.0337
03:01-04:00, Thu., 18 Apr. 0.0358 0.0315 0.0337
02:01-03:00, Thu., 18 Apr. 0.0356 0.0311 0.0335
01:01-02:00, Thu., 18 Apr. 0.0356 0.0308 0.0333
00:01-01:00, Thu., 18 Apr. 0.0362 0.0315 0.0337
23:01-24:00, Wed., 17 Apr. 0.0367 0.0315 0.0336
22:01-23:00, Wed., 17 Apr. 0.0358 0.0302 0.0333
21:01-22:00, Wed., 17 Apr. 0.0356 0.0307 0.0333
20:01-21:00, Wed., 17 Apr. 0.0361 0.0315 0.0334
19:01-20:00, Wed., 17 Apr. 0.0352 0.0303 0.0330
18:01-19:00, Wed., 17 Apr. 0.0351 0.0304 0.0328
17:01-18:00, Wed., 17 Apr. 0.0349 0.0307 0.0329
16:01-17:00, Wed., 17 Apr. 0.0358 0.0311 0.0333
15:01-16:00, Wed., 17 Apr. 0.0367 0.0307 0.0334
14:01-15:00, Wed., 17 Apr. 0.0360 0.0309 0.0335
13:01-14:00, Wed., 17 Apr. 0.0353 0.0315 0.0333
12:01-13:00, Wed., 17 Apr. 0.0359 0.0311 0.0335
11:01-12:00, Wed., 17 Apr. 0.0362 0.0308 0.0335
10:01-11:00, Wed., 17 Apr. 0.0351 0.0311 0.0332
09:01-10:00, Wed., 17 Apr. 0.0358 0.0307 0.0335
08:01-09:00, Wed., 17 Apr. 0.0360 0.0309 0.0338
07:01-08:00, Wed., 17 Apr. 0.0363 0.0323 0.0342
06:01-07:00, Wed., 17 Apr. 0.0363 0.0314 0.0336
05:01-06:00, Wed., 17 Apr. 0.0356 0.0315 0.0333
04:01-05:00, Wed., 17 Apr. 0.0361 0.0302 0.0331
03:01-04:00, Wed., 17 Apr. 0.0349 0.0306 0.0331
02:01-03:00, Wed., 17 Apr. 0.0351 0.0302 0.0333
01:01-02:00, Wed., 17 Apr. 0.0356 0.0308 0.0329
00:01-01:00, Wed., 17 Apr. 0.0361 0.0305 0.0330
23:01-24:00, Tue., 16 Apr. 0.0353 0.0308 0.0328
22:01-23:00, Tue., 16 Apr. 0.0360 0.0311 0.0332
21:01-22:00, Tue., 16 Apr. 0.0352 0.0306 0.0329
20:01-21:00, Tue., 16 Apr. 0.0350 0.0304 0.0329
19:01-20:00, Tue., 16 Apr. 0.0349 0.0309 0.0329
18:01-19:00, Tue., 16 Apr. 0.0354 0.0307 0.0327
17:01-18:00, Tue., 16 Apr. 0.0355 0.0311 0.0329
16:01-17:00, Tue., 16 Apr. 0.0351 0.0305 0.0328
15:01-16:00, Tue., 16 Apr. 0.0349 0.0303 0.0324
14:01-15:00, Tue., 16 Apr. 0.0356 0.0297 0.0328
13:01-14:00, Tue., 16 Apr. 0.0356 0.0307 0.0329
12:01-13:00, Tue., 16 Apr. 0.0348 0.0307 0.0328
11:01-12:00, Tue., 16 Apr. 0.0353 0.0305 0.0327
10:01-11:00, Tue., 16 Apr. 0.0348 0.0302 0.0329
09:01-10:00, Tue., 16 Apr. 0.0357 0.0311 0.0336
08:01-09:00, Tue., 16 Apr. 0.0359 0.0317 0.0342
07:01-08:00, Tue., 16 Apr. 0.0375 0.0315 0.0344
06:01-07:00, Tue., 16 Apr. 0.0373 0.0318 0.0338
05:01-06:00, Tue., 16 Apr. 0.0349 0.0300 0.0327
04:01-05:00, Tue., 16 Apr. 0.0359 0.0311 0.0332
03:01-04:00, Tue., 16 Apr. 0.0350 0.0308 0.0327
02:01-03:00, Tue., 16 Apr. 0.0351 0.0304 0.0329
01:01-02:00, Tue., 16 Apr. 0.0352 0.0302 0.0327
00:01-01:00, Tue., 16 Apr. 0.0349 0.0308 0.0326
23:01-24:00, Mon., 15 Apr. 0.0350 0.0299 0.0328
22:01-23:00, Mon., 15 Apr. 0.0359 0.0307 0.0327
21:01-22:00, Mon., 15 Apr. 0.0348 0.0309 0.0328
20:01-21:00, Mon., 15 Apr. 0.0358 0.0307 0.0330
19:01-20:00, Mon., 15 Apr. 0.0348 0.0304 0.0323
18:01-19:00, Mon., 15 Apr. 0.0355 0.0308 0.0328
17:01-18:00, Mon., 15 Apr. 0.0349 0.0308 0.0325
16:01-17:00, Mon., 15 Apr. 0.0361 0.0307 0.0330
15:01-16:00, Mon., 15 Apr. 0.0361 0.0309 0.0331
14:01-15:00, Mon., 15 Apr. 0.0368 0.0313 0.0331
13:01-14:00, Mon., 15 Apr. 0.0353 0.0308 0.0331
12:01-13:00, Mon., 15 Apr. 0.0356 0.0310 0.0334
11:01-12:00, Mon., 15 Apr. 0.0353 0.0315 0.0332
10:01-11:00, Mon., 15 Apr. 0.0353 0.0308 0.0332
09:01-10:00, Mon., 15 Apr. 0.0364 0.0318 0.0339
08:01-09:00, Mon., 15 Apr. 0.0362 0.0318 0.0340
07:01-08:00, Mon., 15 Apr. 0.0365 0.0316 0.0337
06:01-07:00, Mon., 15 Apr. 0.0363 0.0318 0.0340
05:01-06:00, Mon., 15 Apr. 0.0360 0.0315 0.0341