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
19:01-20:00, Fri., 13 Feb. 0.0355 0.0297 0.0332
18:01-19:00, Fri., 13 Feb. 0.0349 0.0306 0.0329
17:01-18:00, Fri., 13 Feb. 0.0359 0.0302 0.0330
16:01-17:00, Fri., 13 Feb. 0.0355 0.0309 0.0335
15:01-16:00, Fri., 13 Feb. 0.0363 0.0322 0.0338
14:01-15:00, Fri., 13 Feb. 0.0365 0.0309 0.0337
13:01-14:00, Fri., 13 Feb. 0.0361 0.0315 0.0339
12:01-13:00, Fri., 13 Feb. 0.0362 0.0316 0.0343
11:01-12:00, Fri., 13 Feb. 0.0367 0.0320 0.0345
10:01-11:00, Fri., 13 Feb. 0.0372 0.0329 0.0349
09:01-10:00, Fri., 13 Feb. 0.0378 0.0325 0.0352
08:01-09:00, Fri., 13 Feb. 0.0388 0.0340 0.0361
07:01-08:00, Fri., 13 Feb. 0.0388 0.0343 0.0366
06:01-07:00, Fri., 13 Feb. 0.0380 0.0332 0.0356
05:01-06:00, Fri., 13 Feb. 0.0374 0.0329 0.0352
04:01-05:00, Fri., 13 Feb. 0.0377 0.0329 0.0354
03:01-04:00, Fri., 13 Feb. 0.0373 0.0335 0.0354
02:01-03:00, Fri., 13 Feb. 0.0375 0.0324 0.0349
01:01-02:00, Fri., 13 Feb. 0.0364 0.0320 0.0346
00:01-01:00, Fri., 13 Feb. 0.0377 0.0327 0.0346
23:01-24:00, Thu., 12 Feb. 0.0367 0.0322 0.0344
22:01-23:00, Thu., 12 Feb. 0.0366 0.0317 0.0341
21:01-22:00, Thu., 12 Feb. 0.0370 0.0314 0.0340
20:01-21:00, Thu., 12 Feb. 0.0355 0.0312 0.0333
19:01-20:00, Thu., 12 Feb. 0.0357 0.0305 0.0337
18:01-19:00, Thu., 12 Feb. 0.0361 0.0311 0.0334
17:01-18:00, Thu., 12 Feb. 0.0353 0.0311 0.0330
16:01-17:00, Thu., 12 Feb. 0.0352 0.0301 0.0331
15:01-16:00, Thu., 12 Feb. 0.0360 0.0306 0.0336
14:01-15:00, Thu., 12 Feb. 0.0357 0.0311 0.0337
13:01-14:00, Thu., 12 Feb. 0.0359 0.0316 0.0336
12:01-13:00, Thu., 12 Feb. 0.0356 0.0318 0.0336
11:01-12:00, Thu., 12 Feb. 0.0359 0.0304 0.0335
10:01-11:00, Thu., 12 Feb. 0.0361 0.0314 0.0336
09:01-10:00, Thu., 12 Feb. 0.0363 0.0311 0.0336
08:01-09:00, Thu., 12 Feb. 0.0360 0.0314 0.0336
07:01-08:00, Thu., 12 Feb. 0.0362 0.0311 0.0336
06:01-07:00, Thu., 12 Feb. 0.0359 0.0318 0.0336
05:01-06:00, Thu., 12 Feb. 0.0363 0.0312 0.0335
04:01-05:00, Thu., 12 Feb. 0.0359 0.0311 0.0331
03:01-04:00, Thu., 12 Feb. 0.0355 0.0317 0.0336
02:01-03:00, Thu., 12 Feb. 0.0351 0.0312 0.0335
01:01-02:00, Thu., 12 Feb. 0.0363 0.0322 0.0341
00:01-01:00, Thu., 12 Feb. 0.0370 0.0326 0.0348
23:01-24:00, Wed., 11 Feb. 0.0379 0.0327 0.0348
22:01-23:00, Wed., 11 Feb. 0.0357 0.0315 0.0338
21:01-22:00, Wed., 11 Feb. 0.0363 0.0307 0.0331
20:01-21:00, Wed., 11 Feb. 0.0349 0.0301 0.0331
19:01-20:00, Wed., 11 Feb. 0.0357 0.0301 0.0332
18:01-19:00, Wed., 11 Feb. 0.0354 0.0313 0.0332
17:01-18:00, Wed., 11 Feb. 0.0370 0.0315 0.0344
16:01-17:00, Wed., 11 Feb. 0.0389 0.0332 0.0358
15:01-16:00, Wed., 11 Feb. 0.0370 0.0315 0.0347
14:01-15:00, Wed., 11 Feb. 0.0382 0.0326 0.0351
13:01-14:00, Wed., 11 Feb. 0.0384 0.0332 0.0363
12:01-13:00, Wed., 11 Feb. 0.0481 0.0363 0.0417
11:01-12:00, Wed., 11 Feb. 0.0561 0.0470 0.0517
10:01-11:00, Wed., 11 Feb. 0.0561 0.0445 0.0508
09:01-10:00, Wed., 11 Feb. 0.0469 0.0421 0.0445
08:01-09:00, Wed., 11 Feb. 0.0458 0.0374 0.0422
07:01-08:00, Wed., 11 Feb. 0.0499 0.0386 0.0433
06:01-07:00, Wed., 11 Feb. 0.0439 0.0347 0.0385
05:01-06:00, Wed., 11 Feb. 0.0381 0.0327 0.0357
04:01-05:00, Wed., 11 Feb. 0.0374 0.0319 0.0350
03:01-04:00, Wed., 11 Feb. 0.0374 0.0323 0.0352
02:01-03:00, Wed., 11 Feb. 0.0377 0.0332 0.0353
01:01-02:00, Wed., 11 Feb. 0.0377 0.0329 0.0349
00:01-01:00, Wed., 11 Feb. 0.0376 0.0319 0.0346
23:01-24:00, Tue., 10 Feb. 0.0366 0.0329 0.0346
22:01-23:00, Tue., 10 Feb. 0.0365 0.0314 0.0343
21:01-22:00, Tue., 10 Feb. 0.0369 0.0322 0.0344
20:01-21:00, Tue., 10 Feb. 0.0356 0.0315 0.0335
19:01-20:00, Tue., 10 Feb. 0.0370 0.0302 0.0335
18:01-19:00, Tue., 10 Feb. 0.0359 0.0306 0.0332
17:01-18:00, Tue., 10 Feb. 0.0362 0.0301 0.0330
16:01-17:00, Tue., 10 Feb. 0.0360 0.0315 0.0333
15:01-16:00, Tue., 10 Feb. 0.0350 0.0299 0.0330
14:01-15:00, Tue., 10 Feb. 0.0359 0.0306 0.0331
13:01-14:00, Tue., 10 Feb. 0.0351 0.0302 0.0331
12:01-13:00, Tue., 10 Feb. 0.0356 0.0308 0.0332
11:01-12:00, Tue., 10 Feb. 0.0355 0.0306 0.0332
10:01-11:00, Tue., 10 Feb. 0.0361 0.0311 0.0336
09:01-10:00, Tue., 10 Feb. 0.0376 0.0321 0.0343
08:01-09:00, Tue., 10 Feb. 0.0366 0.0323 0.0345
07:01-08:00, Tue., 10 Feb. 0.0369 0.0324 0.0351
06:01-07:00, Tue., 10 Feb. 0.0381 0.0340 0.0359
05:01-06:00, Tue., 10 Feb. 0.0378 0.0332 0.0355
04:01-05:00, Tue., 10 Feb. 0.0377 0.0332 0.0355
03:01-04:00, Tue., 10 Feb. 0.0374 0.0327 0.0350
02:01-03:00, Tue., 10 Feb. 0.0364 0.0326 0.0346
01:01-02:00, Tue., 10 Feb. 0.0365 0.0329 0.0344
00:01-01:00, Tue., 10 Feb. 0.0384 0.0312 0.0342
23:01-24:00, Mon., 09 Feb. 0.0363 0.0307 0.0337
22:01-23:00, Mon., 09 Feb. 0.0357 0.0315 0.0333
21:01-22:00, Mon., 09 Feb. 0.0352 0.0303 0.0331
20:01-21:00, Mon., 09 Feb. 0.0351 0.0312 0.0327
19:01-20:00, Mon., 09 Feb. 0.0347 0.0297 0.0325
18:01-19:00, Mon., 09 Feb. 0.0343 0.0302 0.0326
17:01-18:00, Mon., 09 Feb. 0.0356 0.0304 0.0327
16:01-17:00, Mon., 09 Feb. 0.0346 0.0293 0.0327
15:01-16:00, Mon., 09 Feb. 0.0345 0.0298 0.0325
14:01-15:00, Mon., 09 Feb. 0.0356 0.0302 0.0328
13:01-14:00, Mon., 09 Feb. 0.0347 0.0308 0.0327
12:01-13:00, Mon., 09 Feb. 0.0351 0.0308 0.0331
11:01-12:00, Mon., 09 Feb. 0.0352 0.0304 0.0326
10:01-11:00, Mon., 09 Feb. 0.0362 0.0294 0.0324
09:01-10:00, Mon., 09 Feb. 0.0353 0.0305 0.0329
08:01-09:00, Mon., 09 Feb. 0.0350 0.0298 0.0329
07:01-08:00, Mon., 09 Feb. 0.0362 0.0309 0.0335
06:01-07:00, Mon., 09 Feb. 0.0360 0.0319 0.0335
05:01-06:00, Mon., 09 Feb. 0.0358 0.0312 0.0333
04:01-05:00, Mon., 09 Feb. 0.0353 0.0314 0.0331
03:01-04:00, Mon., 09 Feb. 0.0349 0.0308 0.0329
02:01-03:00, Mon., 09 Feb. 0.0362 0.0301 0.0327
01:01-02:00, Mon., 09 Feb. 0.0343 0.0296 0.0326
00:01-01:00, Mon., 09 Feb. 0.0353 0.0308 0.0328
23:01-24:00, Sun., 08 Feb. 0.0348 0.0302 0.0325
22:01-23:00, Sun., 08 Feb. 0.0348 0.0307 0.0330
21:01-22:00, Sun., 08 Feb. 0.0347 0.0307 0.0329
20:01-21:00, Sun., 08 Feb. 0.0353 0.0308 0.0329
19:01-20:00, Sun., 08 Feb. 0.0355 0.0305 0.0329
18:01-19:00, Sun., 08 Feb. 0.0341 0.0301 0.0323
17:01-18:00, Sun., 08 Feb. 0.0340 0.0300 0.0323
16:01-17:00, Sun., 08 Feb. 0.0344 0.0301 0.0326
15:01-16:00, Sun., 08 Feb. 0.0353 0.0308 0.0326
14:01-15:00, Sun., 08 Feb. 0.0345 0.0307 0.0327
13:01-14:00, Sun., 08 Feb. 0.0354 0.0301 0.0333
12:01-13:00, Sun., 08 Feb. 0.0396 0.0328 0.0357
11:01-12:00, Sun., 08 Feb. 0.0410 0.0356 0.0378
10:01-11:00, Sun., 08 Feb. 0.0446 0.0354 0.0406
09:01-10:00, Sun., 08 Feb. 0.0452 0.0398 0.0430
08:01-09:00, Sun., 08 Feb. 0.0421 0.0348 0.0383
07:01-08:00, Sun., 08 Feb. 0.0380 0.0318 0.0342
06:01-07:00, Sun., 08 Feb. 0.0367 0.0308 0.0335
05:01-06:00, Sun., 08 Feb. 0.0377 0.0326 0.0352
04:01-05:00, Sun., 08 Feb. 0.0401 0.0350 0.0374
03:01-04:00, Sun., 08 Feb. 0.0425 0.0365 0.0395
02:01-03:00, Sun., 08 Feb. 0.0473 0.0398 0.0436
01:01-02:00, Sun., 08 Feb. 0.0462 0.0345 0.0396
00:01-01:00, Sun., 08 Feb. 0.0377 0.0336 0.0357
23:01-24:00, Sat., 07 Feb. 0.0423 0.0353 0.0389
22:01-23:00, Sat., 07 Feb. 0.0494 0.0394 0.0439
21:01-22:00, Sat., 07 Feb. 0.0500 0.0366 0.0449
20:01-21:00, Sat., 07 Feb. 0.0397 0.0335 0.0365
19:01-20:00, Sat., 07 Feb. 0.0373 0.0311 0.0341
18:01-19:00, Sat., 07 Feb. 0.0358 0.0318 0.0336
17:01-18:00, Sat., 07 Feb. 0.0363 0.0311 0.0337
16:01-17:00, Sat., 07 Feb. 0.0376 0.0312 0.0341
15:01-16:00, Sat., 07 Feb. 0.0383 0.0321 0.0351
14:01-15:00, Sat., 07 Feb. 0.0426 0.0339 0.0385
13:01-14:00, Sat., 07 Feb. 0.0470 0.0418 0.0446
12:01-13:00, Sat., 07 Feb. 0.0450 0.0341 0.0399
11:01-12:00, Sat., 07 Feb. 0.0407 0.0349 0.0371
10:01-11:00, Sat., 07 Feb. 0.0374 0.0325 0.0351
09:01-10:00, Sat., 07 Feb. 0.0356 0.0315 0.0337
08:01-09:00, Sat., 07 Feb. 0.0367 0.0316 0.0340
07:01-08:00, Sat., 07 Feb. 0.0367 0.0315 0.0339
06:01-07:00, Sat., 07 Feb. 0.0377 0.0317 0.0341
05:01-06:00, Sat., 07 Feb. 0.0369 0.0313 0.0340
04:01-05:00, Sat., 07 Feb. 0.0367 0.0309 0.0338
03:01-04:00, Sat., 07 Feb. 0.0367 0.0318 0.0340
02:01-03:00, Sat., 07 Feb. 0.0372 0.0318 0.0339
01:01-02:00, Sat., 07 Feb. 0.0360 0.0314 0.0340
00:01-01:00, Sat., 07 Feb. 0.0363 0.0306 0.0340
23:01-24:00, Fri., 06 Feb. 0.0376 0.0318 0.0341
22:01-23:00, Fri., 06 Feb. 0.0377 0.0323 0.0341
21:01-22:00, Fri., 06 Feb. 0.0360 0.0315 0.0340
20:01-21:00, Fri., 06 Feb. 0.0358 0.0315 0.0340
19:01-20:00, Fri., 06 Feb. 0.0369 0.0318 0.0341
18:01-19:00, Fri., 06 Feb. 0.0368 0.0318 0.0339
17:01-18:00, Fri., 06 Feb. 0.0377 0.0319 0.0339
16:01-17:00, Fri., 06 Feb. 0.0361 0.0318 0.0339
15:01-16:00, Fri., 06 Feb. 0.0368 0.0318 0.0338
14:01-15:00, Fri., 06 Feb. 0.0355 0.0308 0.0337
13:01-14:00, Fri., 06 Feb. 0.0369 0.0316 0.0341
12:01-13:00, Fri., 06 Feb. 0.0363 0.0321 0.0342
11:01-12:00, Fri., 06 Feb. 0.0363 0.0317 0.0343
10:01-11:00, Fri., 06 Feb. 0.0386 0.0332 0.0352
09:01-10:00, Fri., 06 Feb. 0.0391 0.0338 0.0361
08:01-09:00, Fri., 06 Feb. 0.0388 0.0339 0.0361
07:01-08:00, Fri., 06 Feb. 0.0389 0.0331 0.0359
06:01-07:00, Fri., 06 Feb. 0.0382 0.0332 0.0358
05:01-06:00, Fri., 06 Feb. 0.0381 0.0337 0.0363
04:01-05:00, Fri., 06 Feb. 0.0381 0.0332 0.0356
03:01-04:00, Fri., 06 Feb. 0.0373 0.0330 0.0353
02:01-03:00, Fri., 06 Feb. 0.0380 0.0335 0.0358
01:01-02:00, Fri., 06 Feb. 0.0378 0.0336 0.0353
00:01-01:00, Fri., 06 Feb. 0.0377 0.0331 0.0349
23:01-24:00, Thu., 05 Feb. 0.0373 0.0322 0.0348
22:01-23:00, Thu., 05 Feb. 0.0367 0.0318 0.0346
21:01-22:00, Thu., 05 Feb. 0.0379 0.0311 0.0346
20:01-21:00, Thu., 05 Feb. 0.0374 0.0319 0.0343
19:01-20:00, Thu., 05 Feb. 0.0372 0.0321 0.0342
18:01-19:00, Thu., 05 Feb. 0.0367 0.0315 0.0338
17:01-18:00, Thu., 05 Feb. 0.0372 0.0318 0.0341
16:01-17:00, Thu., 05 Feb. 0.0360 0.0308 0.0339
15:01-16:00, Thu., 05 Feb. 0.0361 0.0318 0.0340
14:01-15:00, Thu., 05 Feb. 0.0357 0.0315 0.0337
13:01-14:00, Thu., 05 Feb. 0.0360 0.0309 0.0339
12:01-13:00, Thu., 05 Feb. 0.0358 0.0323 0.0342
11:01-12:00, Thu., 05 Feb. 0.0367 0.0323 0.0343
10:01-11:00, Thu., 05 Feb. 0.0377 0.0327 0.0354
09:01-10:00, Thu., 05 Feb. 0.0384 0.0335 0.0360
08:01-09:00, Thu., 05 Feb. 0.0389 0.0332 0.0361
07:01-08:00, Thu., 05 Feb. 0.0399 0.0338 0.0363
06:01-07:00, Thu., 05 Feb. 0.0399 0.0351 0.0371
05:01-06:00, Thu., 05 Feb. 0.0402 0.0339 0.0367
04:01-05:00, Thu., 05 Feb. 0.0391 0.0340 0.0363
03:01-04:00, Thu., 05 Feb. 0.0390 0.0341 0.0362
02:01-03:00, Thu., 05 Feb. 0.0385 0.0332 0.0356
01:01-02:00, Thu., 05 Feb. 0.0381 0.0331 0.0354
00:01-01:00, Thu., 05 Feb. 0.0391 0.0327 0.0353
23:01-24:00, Wed., 04 Feb. 0.0384 0.0326 0.0351
22:01-23:00, Wed., 04 Feb. 0.0377 0.0329 0.0352
21:01-22:00, Wed., 04 Feb. 0.0380 0.0325 0.0348
20:01-21:00, Wed., 04 Feb. 0.0362 0.0322 0.0343
19:01-20:00, Wed., 04 Feb. 0.0358 0.0316 0.0337
18:01-19:00, Wed., 04 Feb. 0.0362 0.0315 0.0337
17:01-18:00, Wed., 04 Feb. 0.0360 0.0318 0.0335
16:01-17:00, Wed., 04 Feb. 0.0360 0.0315 0.0336
15:01-16:00, Wed., 04 Feb. 0.0356 0.0315 0.0339
14:01-15:00, Wed., 04 Feb. 0.0364 0.0316 0.0339
13:01-14:00, Wed., 04 Feb. 0.0375 0.0315 0.0340
12:01-13:00, Wed., 04 Feb. 0.0360 0.0317 0.0339
11:01-12:00, Wed., 04 Feb. 0.0361 0.0318 0.0339
10:01-11:00, Wed., 04 Feb. 0.0363 0.0320 0.0340
09:01-10:00, Wed., 04 Feb. 0.0367 0.0330 0.0348
08:01-09:00, Wed., 04 Feb. 0.0393 0.0345 0.0365
07:01-08:00, Wed., 04 Feb. 0.0392 0.0332 0.0365
06:01-07:00, Wed., 04 Feb. 0.0379 0.0326 0.0353
05:01-06:00, Wed., 04 Feb. 0.0377 0.0325 0.0349
04:01-05:00, Wed., 04 Feb. 0.0381 0.0318 0.0346
03:01-04:00, Wed., 04 Feb. 0.0371 0.0325 0.0349
02:01-03:00, Wed., 04 Feb. 0.0370 0.0317 0.0347
01:01-02:00, Wed., 04 Feb. 0.0381 0.0321 0.0344
00:01-01:00, Wed., 04 Feb. 0.0374 0.0318 0.0345
23:01-24:00, Tue., 03 Feb. 0.0376 0.0329 0.0348
22:01-23:00, Tue., 03 Feb. 0.0363 0.0321 0.0344
21:01-22:00, Tue., 03 Feb. 0.0367 0.0318 0.0342
20:01-21:00, Tue., 03 Feb. 0.0356 0.0307 0.0333