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
07:01-08:00, Sat., 22 Aug. 0.0387 0.0333 0.0358
06:01-07:00, Sat., 22 Aug. 0.0380 0.0332 0.0354
05:01-06:00, Sat., 22 Aug. 0.0381 0.0322 0.0353
04:01-05:00, Sat., 22 Aug. 0.0368 0.0317 0.0343
03:01-04:00, Sat., 22 Aug. 0.0360 0.0312 0.0341
02:01-03:00, Sat., 22 Aug. 0.0363 0.0325 0.0342
01:01-02:00, Sat., 22 Aug. 0.0365 0.0317 0.0347
00:01-01:00, Sat., 22 Aug. 0.0395 0.0336 0.0364
23:01-24:00, Fri., 21 Aug. 0.0374 0.0321 0.0350
22:01-23:00, Fri., 21 Aug. 0.0390 0.0328 0.0363
21:01-22:00, Fri., 21 Aug. 0.0495 0.0379 0.0433
20:01-21:00, Fri., 21 Aug. 0.0509 0.0426 0.0480
19:01-20:00, Fri., 21 Aug. 0.0471 0.0313 0.0393
18:01-19:00, Fri., 21 Aug. 0.0362 0.0312 0.0337
17:01-18:00, Fri., 21 Aug. 0.0363 0.0309 0.0337
16:01-17:00, Fri., 21 Aug. 0.0360 0.0318 0.0340
15:01-16:00, Fri., 21 Aug. 0.0371 0.0322 0.0346
14:01-15:00, Fri., 21 Aug. 0.0376 0.0325 0.0356
13:01-14:00, Fri., 21 Aug. 0.0369 0.0315 0.0343
12:01-13:00, Fri., 21 Aug. 0.0354 0.0309 0.0334
11:01-12:00, Fri., 21 Aug. 0.0357 0.0317 0.0336
10:01-11:00, Fri., 21 Aug. 0.0364 0.0322 0.0340
09:01-10:00, Fri., 21 Aug. 0.0386 0.0331 0.0354
08:01-09:00, Fri., 21 Aug. 0.0384 0.0329 0.0357
07:01-08:00, Fri., 21 Aug. 0.0384 0.0336 0.0360
06:01-07:00, Fri., 21 Aug. 0.0379 0.0340 0.0362
05:01-06:00, Fri., 21 Aug. 0.0395 0.0345 0.0366
04:01-05:00, Fri., 21 Aug. 0.0382 0.0339 0.0361
03:01-04:00, Fri., 21 Aug. 0.0377 0.0329 0.0350
02:01-03:00, Fri., 21 Aug. 0.0357 0.0317 0.0339
01:01-02:00, Fri., 21 Aug. 0.0359 0.0317 0.0336
00:01-01:00, Fri., 21 Aug. 0.0353 0.0316 0.0336
23:01-24:00, Thu., 20 Aug. 0.0361 0.0307 0.0336
22:01-23:00, Thu., 20 Aug. 0.0361 0.0314 0.0337
21:01-22:00, Thu., 20 Aug. 0.0377 0.0316 0.0348
20:01-21:00, Thu., 20 Aug. 0.0390 0.0338 0.0362
19:01-20:00, Thu., 20 Aug. 0.0370 0.0315 0.0344
18:01-19:00, Thu., 20 Aug. 0.0358 0.0313 0.0338
17:01-18:00, Thu., 20 Aug. 0.0356 0.0315 0.0337
16:01-17:00, Thu., 20 Aug. 0.0359 0.0312 0.0335
15:01-16:00, Thu., 20 Aug. 0.0358 0.0314 0.0333
14:01-15:00, Thu., 20 Aug. 0.0358 0.0301 0.0334
13:01-14:00, Thu., 20 Aug. 0.0353 0.0311 0.0335
12:01-13:00, Thu., 20 Aug. 0.0360 0.0312 0.0334
11:01-12:00, Thu., 20 Aug. 0.0370 0.0319 0.0341
10:01-11:00, Thu., 20 Aug. 0.0360 0.0310 0.0336
09:01-10:00, Thu., 20 Aug. 0.0373 0.0313 0.0340
08:01-09:00, Thu., 20 Aug. 0.0362 0.0321 0.0338
07:01-08:00, Thu., 20 Aug. 0.0373 0.0323 0.0350
06:01-07:00, Thu., 20 Aug. 0.0381 0.0329 0.0358
05:01-06:00, Thu., 20 Aug. 0.0377 0.0314 0.0355
04:01-05:00, Thu., 20 Aug. 0.0373 0.0322 0.0347
03:01-04:00, Thu., 20 Aug. 0.0360 0.0311 0.0337
02:01-03:00, Thu., 20 Aug. 0.0356 0.0307 0.0333
01:01-02:00, Thu., 20 Aug. 0.0353 0.0298 0.0332
00:01-01:00, Thu., 20 Aug. 0.0365 0.0311 0.0335
23:01-24:00, Wed., 19 Aug. 0.0361 0.0308 0.0332
22:01-23:00, Wed., 19 Aug. 0.0357 0.0312 0.0334
21:01-22:00, Wed., 19 Aug. 0.0355 0.0317 0.0332
20:01-21:00, Wed., 19 Aug. 0.0358 0.0309 0.0336
19:01-20:00, Wed., 19 Aug. 0.0363 0.0311 0.0334
18:01-19:00, Wed., 19 Aug. 0.0355 0.0311 0.0335
17:01-18:00, Wed., 19 Aug. 0.0357 0.0307 0.0336
16:01-17:00, Wed., 19 Aug. 0.0355 0.0313 0.0335
15:01-16:00, Wed., 19 Aug. 0.0353 0.0311 0.0333
14:01-15:00, Wed., 19 Aug. 0.0354 0.0313 0.0337
13:01-14:00, Wed., 19 Aug. 0.0355 0.0304 0.0333
12:01-13:00, Wed., 19 Aug. 0.0356 0.0306 0.0336
11:01-12:00, Wed., 19 Aug. 0.0363 0.0304 0.0335
10:01-11:00, Wed., 19 Aug. 0.0373 0.0317 0.0338
09:01-10:00, Wed., 19 Aug. 0.0358 0.0323 0.0340
08:01-09:00, Wed., 19 Aug. 0.0371 0.0311 0.0339
07:01-08:00, Wed., 19 Aug. 0.0366 0.0324 0.0347
06:01-07:00, Wed., 19 Aug. 0.0386 0.0318 0.0349
05:01-06:00, Wed., 19 Aug. 0.0371 0.0314 0.0344
04:01-05:00, Wed., 19 Aug. 0.0371 0.0325 0.0346
03:01-04:00, Wed., 19 Aug. 0.0363 0.0318 0.0342
02:01-03:00, Wed., 19 Aug. 0.0363 0.0318 0.0339
01:01-02:00, Wed., 19 Aug. 0.0354 0.0311 0.0334
00:01-01:00, Wed., 19 Aug. 0.0347 0.0303 0.0328
23:01-24:00, Tue., 18 Aug. 0.0356 0.0306 0.0330
22:01-23:00, Tue., 18 Aug. 0.0349 0.0303 0.0331
21:01-22:00, Tue., 18 Aug. 0.0366 0.0309 0.0330
20:01-21:00, Tue., 18 Aug. 0.0351 0.0312 0.0332
19:01-20:00, Tue., 18 Aug. 0.0356 0.0308 0.0333
18:01-19:00, Tue., 18 Aug. 0.0353 0.0305 0.0333
17:01-18:00, Tue., 18 Aug. 0.0356 0.0309 0.0335
16:01-17:00, Tue., 18 Aug. 0.0360 0.0306 0.0335
15:01-16:00, Tue., 18 Aug. 0.0363 0.0302 0.0334
14:01-15:00, Tue., 18 Aug. 0.0356 0.0305 0.0332
13:01-14:00, Tue., 18 Aug. 0.0356 0.0302 0.0332
12:01-13:00, Tue., 18 Aug. 0.0349 0.0310 0.0331
11:01-12:00, Tue., 18 Aug. 0.0354 0.0307 0.0335
10:01-11:00, Tue., 18 Aug. 0.0359 0.0314 0.0336
09:01-10:00, Tue., 18 Aug. 0.0356 0.0315 0.0340
08:01-09:00, Tue., 18 Aug. 0.0362 0.0315 0.0341
07:01-08:00, Tue., 18 Aug. 0.0380 0.0322 0.0357
06:01-07:00, Tue., 18 Aug. 0.0384 0.0325 0.0357
05:01-06:00, Tue., 18 Aug. 0.0379 0.0336 0.0355
04:01-05:00, Tue., 18 Aug. 0.0380 0.0331 0.0353
03:01-04:00, Tue., 18 Aug. 0.0361 0.0322 0.0345
02:01-03:00, Tue., 18 Aug. 0.0367 0.0322 0.0344
01:01-02:00, Tue., 18 Aug. 0.0363 0.0325 0.0341
00:01-01:00, Tue., 18 Aug. 0.0367 0.0309 0.0338
23:01-24:00, Mon., 17 Aug. 0.0353 0.0314 0.0333
22:01-23:00, Mon., 17 Aug. 0.0362 0.0310 0.0331
21:01-22:00, Mon., 17 Aug. 0.0343 0.0311 0.0329
20:01-21:00, Mon., 17 Aug. 0.0355 0.0316 0.0332
19:01-20:00, Mon., 17 Aug. 0.0352 0.0309 0.0334
18:01-19:00, Mon., 17 Aug. 0.0353 0.0296 0.0332
17:01-18:00, Mon., 17 Aug. 0.0356 0.0309 0.0335
16:01-17:00, Mon., 17 Aug. 0.0349 0.0308 0.0332
15:01-16:00, Mon., 17 Aug. 0.0349 0.0303 0.0330
14:01-15:00, Mon., 17 Aug. 0.0359 0.0301 0.0331
13:01-14:00, Mon., 17 Aug. 0.0359 0.0314 0.0332
12:01-13:00, Mon., 17 Aug. 0.0366 0.0309 0.0332
11:01-12:00, Mon., 17 Aug. 0.0369 0.0302 0.0332
10:01-11:00, Mon., 17 Aug. 0.0359 0.0312 0.0333
09:01-10:00, Mon., 17 Aug. 0.0369 0.0310 0.0332
08:01-09:00, Mon., 17 Aug. 0.0355 0.0318 0.0335
07:01-08:00, Mon., 17 Aug. 0.0350 0.0299 0.0330
06:01-07:00, Mon., 17 Aug. 0.0357 0.0316 0.0332
05:01-06:00, Mon., 17 Aug. 0.0349 0.0309 0.0327
04:01-05:00, Mon., 17 Aug. 0.0351 0.0304 0.0328
03:01-04:00, Mon., 17 Aug. 0.0349 0.0299 0.0330
02:01-03:00, Mon., 17 Aug. 0.0361 0.0307 0.0327
01:01-02:00, Mon., 17 Aug. 0.0347 0.0314 0.0329
00:01-01:00, Mon., 17 Aug. 0.0352 0.0303 0.0328
23:01-24:00, Sun., 16 Aug. 0.0361 0.0302 0.0329
22:01-23:00, Sun., 16 Aug. 0.0359 0.0304 0.0330
21:01-22:00, Sun., 16 Aug. 0.0354 0.0308 0.0331
20:01-21:00, Sun., 16 Aug. 0.0358 0.0308 0.0335
19:01-20:00, Sun., 16 Aug. 0.0358 0.0312 0.0335
18:01-19:00, Sun., 16 Aug. 0.0357 0.0318 0.0338
17:01-18:00, Sun., 16 Aug. 0.0362 0.0315 0.0336
16:01-17:00, Sun., 16 Aug. 0.0363 0.0308 0.0340
15:01-16:00, Sun., 16 Aug. 0.0361 0.0302 0.0335
14:01-15:00, Sun., 16 Aug. 0.0357 0.0304 0.0334
13:01-14:00, Sun., 16 Aug. 0.0353 0.0310 0.0334
12:01-13:00, Sun., 16 Aug. 0.0364 0.0313 0.0337
11:01-12:00, Sun., 16 Aug. 0.0366 0.0309 0.0335
10:01-11:00, Sun., 16 Aug. 0.0371 0.0314 0.0334
09:01-10:00, Sun., 16 Aug. 0.0355 0.0313 0.0333
08:01-09:00, Sun., 16 Aug. 0.0361 0.0311 0.0337
07:01-08:00, Sun., 16 Aug. 0.0368 0.0311 0.0334
06:01-07:00, Sun., 16 Aug. 0.0354 0.0310 0.0331
05:01-06:00, Sun., 16 Aug. 0.0349 0.0312 0.0333
04:01-05:00, Sun., 16 Aug. 0.0347 0.0307 0.0328
03:01-04:00, Sun., 16 Aug. 0.0349 0.0305 0.0330
02:01-03:00, Sun., 16 Aug. 0.0358 0.0303 0.0329
01:01-02:00, Sun., 16 Aug. 0.0357 0.0309 0.0327
00:01-01:00, Sun., 16 Aug. 0.0354 0.0308 0.0329
23:01-24:00, Sat., 15 Aug. 0.0352 0.0313 0.0330
22:01-23:00, Sat., 15 Aug. 0.0360 0.0303 0.0332
21:01-22:00, Sat., 15 Aug. 0.0349 0.0294 0.0331
20:01-21:00, Sat., 15 Aug. 0.0349 0.0313 0.0331
19:01-20:00, Sat., 15 Aug. 0.0360 0.0311 0.0331
18:01-19:00, Sat., 15 Aug. 0.0356 0.0309 0.0328
17:01-18:00, Sat., 15 Aug. 0.0356 0.0305 0.0329
16:01-17:00, Sat., 15 Aug. 0.0353 0.0308 0.0333
15:01-16:00, Sat., 15 Aug. 0.0358 0.0311 0.0329
14:01-15:00, Sat., 15 Aug. 0.0356 0.0312 0.0332
13:01-14:00, Sat., 15 Aug. 0.0370 0.0314 0.0334
12:01-13:00, Sat., 15 Aug. 0.0358 0.0308 0.0331
11:01-12:00, Sat., 15 Aug. 0.0358 0.0307 0.0331
10:01-11:00, Sat., 15 Aug. 0.0353 0.0309 0.0331
09:01-10:00, Sat., 15 Aug. 0.0366 0.0307 0.0331
08:01-09:00, Sat., 15 Aug. 0.0363 0.0304 0.0330
07:01-08:00, Sat., 15 Aug. 0.0353 0.0305 0.0330
06:01-07:00, Sat., 15 Aug. 0.0353 0.0304 0.0330
05:01-06:00, Sat., 15 Aug. 0.0354 0.0308 0.0332
04:01-05:00, Sat., 15 Aug. 0.0366 0.0311 0.0339
03:01-04:00, Sat., 15 Aug. 0.0381 0.0326 0.0351
02:01-03:00, Sat., 15 Aug. 0.0360 0.0303 0.0334
01:01-02:00, Sat., 15 Aug. 0.0363 0.0321 0.0343
00:01-01:00, Sat., 15 Aug. 0.0363 0.0312 0.0339
23:01-24:00, Fri., 14 Aug. 0.0376 0.0325 0.0346
22:01-23:00, Fri., 14 Aug. 0.0390 0.0323 0.0364
21:01-22:00, Fri., 14 Aug. 0.0376 0.0315 0.0340
20:01-21:00, Fri., 14 Aug. 0.0356 0.0317 0.0335
19:01-20:00, Fri., 14 Aug. 0.0356 0.0309 0.0333
18:01-19:00, Fri., 14 Aug. 0.0352 0.0301 0.0332
17:01-18:00, Fri., 14 Aug. 0.0360 0.0304 0.0333
16:01-17:00, Fri., 14 Aug. 0.0360 0.0308 0.0335
15:01-16:00, Fri., 14 Aug. 0.0353 0.0311 0.0332
14:01-15:00, Fri., 14 Aug. 0.0357 0.0308 0.0334
13:01-14:00, Fri., 14 Aug. 0.0370 0.0311 0.0336
12:01-13:00, Fri., 14 Aug. 0.0361 0.0304 0.0333
11:01-12:00, Fri., 14 Aug. 0.0358 0.0301 0.0336
10:01-11:00, Fri., 14 Aug. 0.0358 0.0304 0.0334
09:01-10:00, Fri., 14 Aug. 0.0356 0.0301 0.0335
08:01-09:00, Fri., 14 Aug. 0.0357 0.0308 0.0334
07:01-08:00, Fri., 14 Aug. 0.0354 0.0302 0.0330
06:01-07:00, Fri., 14 Aug. 0.0356 0.0307 0.0334
05:01-06:00, Fri., 14 Aug. 0.0356 0.0314 0.0336
04:01-05:00, Fri., 14 Aug. 0.0367 0.0323 0.0342
03:01-04:00, Fri., 14 Aug. 0.0364 0.0313 0.0343
02:01-03:00, Fri., 14 Aug. 0.0367 0.0315 0.0343
01:01-02:00, Fri., 14 Aug. 0.0407 0.0350 0.0371
00:01-01:00, Fri., 14 Aug. 0.0403 0.0361 0.0378
23:01-24:00, Thu., 13 Aug. 0.0402 0.0347 0.0375
22:01-23:00, Thu., 13 Aug. 0.0391 0.0342 0.0367
21:01-22:00, Thu., 13 Aug. 0.0372 0.0314 0.0340
20:01-21:00, Thu., 13 Aug. 0.0352 0.0311 0.0330
19:01-20:00, Thu., 13 Aug. 0.0347 0.0310 0.0330
18:01-19:00, Thu., 13 Aug. 0.0359 0.0311 0.0334
17:01-18:00, Thu., 13 Aug. 0.0370 0.0322 0.0343
16:01-17:00, Thu., 13 Aug. 0.0375 0.0318 0.0344
15:01-16:00, Thu., 13 Aug. 0.0355 0.0310 0.0333
14:01-15:00, Thu., 13 Aug. 0.0361 0.0319 0.0338
13:01-14:00, Thu., 13 Aug. 0.0370 0.0322 0.0344
12:01-13:00, Thu., 13 Aug. 0.0393 0.0335 0.0368
11:01-12:00, Thu., 13 Aug. 0.0431 0.0360 0.0396
10:01-11:00, Thu., 13 Aug. 0.0385 0.0325 0.0345
09:01-10:00, Thu., 13 Aug. 0.0367 0.0329 0.0344
08:01-09:00, Thu., 13 Aug. 0.0369 0.0319 0.0348
07:01-08:00, Thu., 13 Aug. 0.0360 0.0311 0.0337
06:01-07:00, Thu., 13 Aug. 0.0364 0.0313 0.0336
05:01-06:00, Thu., 13 Aug. 0.0363 0.0299 0.0334
04:01-05:00, Thu., 13 Aug. 0.0367 0.0307 0.0330
03:01-04:00, Thu., 13 Aug. 0.0353 0.0317 0.0331
02:01-03:00, Thu., 13 Aug. 0.0360 0.0312 0.0332
01:01-02:00, Thu., 13 Aug. 0.0355 0.0308 0.0331
00:01-01:00, Thu., 13 Aug. 0.0351 0.0308 0.0331
23:01-24:00, Wed., 12 Aug. 0.0359 0.0314 0.0331
22:01-23:00, Wed., 12 Aug. 0.0367 0.0315 0.0332
21:01-22:00, Wed., 12 Aug. 0.0368 0.0320 0.0341
20:01-21:00, Wed., 12 Aug. 0.0398 0.0323 0.0363
19:01-20:00, Wed., 12 Aug. 0.0402 0.0332 0.0362
18:01-19:00, Wed., 12 Aug. 0.0400 0.0342 0.0370
17:01-18:00, Wed., 12 Aug. 0.0398 0.0331 0.0357
16:01-17:00, Wed., 12 Aug. 0.0402 0.0340 0.0374
15:01-16:00, Wed., 12 Aug. 0.0397 0.0315 0.0348
14:01-15:00, Wed., 12 Aug. 0.0362 0.0309 0.0339
13:01-14:00, Wed., 12 Aug. 0.0378 0.0325 0.0355
12:01-13:00, Wed., 12 Aug. 0.0392 0.0315 0.0352
11:01-12:00, Wed., 12 Aug. 0.0356 0.0318 0.0335
10:01-11:00, Wed., 12 Aug. 0.0358 0.0313 0.0331
09:01-10:00, Wed., 12 Aug. 0.0365 0.0315 0.0342
08:01-09:00, Wed., 12 Aug. 0.0377 0.0318 0.0352