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
11:01-12:00, Sat., 26 Apr. 0.0359 0.0302 0.0334
10:01-11:00, Sat., 26 Apr. 0.0356 0.0304 0.0332
09:01-10:00, Sat., 26 Apr. 0.0366 0.0316 0.0336
08:01-09:00, Sat., 26 Apr. 0.0355 0.0314 0.0334
07:01-08:00, Sat., 26 Apr. 0.0352 0.0301 0.0332
06:01-07:00, Sat., 26 Apr. 0.0360 0.0313 0.0331
05:01-06:00, Sat., 26 Apr. 0.0351 0.0311 0.0331
04:01-05:00, Sat., 26 Apr. 0.0354 0.0305 0.0328
03:01-04:00, Sat., 26 Apr. 0.0352 0.0298 0.0329
02:01-03:00, Sat., 26 Apr. 0.0352 0.0307 0.0329
01:01-02:00, Sat., 26 Apr. 0.0364 0.0309 0.0334
00:01-01:00, Sat., 26 Apr. 0.0350 0.0311 0.0331
23:01-24:00, Fri., 25 Apr. 0.0355 0.0308 0.0332
22:01-23:00, Fri., 25 Apr. 0.0359 0.0303 0.0331
21:01-22:00, Fri., 25 Apr. 0.0363 0.0318 0.0335
20:01-21:00, Fri., 25 Apr. 0.0366 0.0318 0.0338
19:01-20:00, Fri., 25 Apr. 0.0350 0.0308 0.0331
18:01-19:00, Fri., 25 Apr. 0.0353 0.0308 0.0331
17:01-18:00, Fri., 25 Apr. 0.0353 0.0313 0.0332
16:01-17:00, Fri., 25 Apr. 0.0358 0.0312 0.0332
15:01-16:00, Fri., 25 Apr. 0.0353 0.0310 0.0331
14:01-15:00, Fri., 25 Apr. 0.0361 0.0304 0.0332
13:01-14:00, Fri., 25 Apr. 0.0350 0.0305 0.0328
12:01-13:00, Fri., 25 Apr. 0.0359 0.0307 0.0330
11:01-12:00, Fri., 25 Apr. 0.0366 0.0308 0.0334
10:01-11:00, Fri., 25 Apr. 0.0362 0.0316 0.0334
09:01-10:00, Fri., 25 Apr. 0.0356 0.0312 0.0333
08:01-09:00, Fri., 25 Apr. 0.0359 0.0308 0.0335
07:01-08:00, Fri., 25 Apr. 0.0379 0.0314 0.0342
06:01-07:00, Fri., 25 Apr. 0.0380 0.0322 0.0347
05:01-06:00, Fri., 25 Apr. 0.0379 0.0325 0.0354
04:01-05:00, Fri., 25 Apr. 0.0357 0.0317 0.0337
03:01-04:00, Fri., 25 Apr. 0.0364 0.0310 0.0338
02:01-03:00, Fri., 25 Apr. 0.0356 0.0313 0.0332
01:01-02:00, Fri., 25 Apr. 0.0356 0.0311 0.0333
00:01-01:00, Fri., 25 Apr. 0.0368 0.0317 0.0336
23:01-24:00, Thu., 24 Apr. 0.0361 0.0312 0.0334
22:01-23:00, Thu., 24 Apr. 0.0354 0.0305 0.0331
21:01-22:00, Thu., 24 Apr. 0.0358 0.0320 0.0336
20:01-21:00, Thu., 24 Apr. 0.0358 0.0308 0.0332
19:01-20:00, Thu., 24 Apr. 0.0353 0.0312 0.0333
18:01-19:00, Thu., 24 Apr. 0.0360 0.0306 0.0330
17:01-18:00, Thu., 24 Apr. 0.0358 0.0301 0.0328
16:01-17:00, Thu., 24 Apr. 0.0358 0.0304 0.0331
15:01-16:00, Thu., 24 Apr. 0.0345 0.0299 0.0328
14:01-15:00, Thu., 24 Apr. 0.0351 0.0307 0.0333
13:01-14:00, Thu., 24 Apr. 0.0357 0.0311 0.0332
12:01-13:00, Thu., 24 Apr. 0.0349 0.0308 0.0330
11:01-12:00, Thu., 24 Apr. 0.0352 0.0307 0.0331
10:01-11:00, Thu., 24 Apr. 0.0368 0.0308 0.0336
09:01-10:00, Thu., 24 Apr. 0.0360 0.0308 0.0332
08:01-09:00, Thu., 24 Apr. 0.0355 0.0311 0.0334
07:01-08:00, Thu., 24 Apr. 0.0370 0.0308 0.0339
06:01-07:00, Thu., 24 Apr. 0.0366 0.0304 0.0337
05:01-06:00, Thu., 24 Apr. 0.0362 0.0311 0.0338
04:01-05:00, Thu., 24 Apr. 0.0358 0.0322 0.0338
03:01-04:00, Thu., 24 Apr. 0.0363 0.0301 0.0338
02:01-03:00, Thu., 24 Apr. 0.0356 0.0311 0.0336
01:01-02:00, Thu., 24 Apr. 0.0362 0.0309 0.0332
00:01-01:00, Thu., 24 Apr. 0.0354 0.0311 0.0332
23:01-24:00, Wed., 23 Apr. 0.0344 0.0303 0.0329
22:01-23:00, Wed., 23 Apr. 0.0351 0.0304 0.0329
21:01-22:00, Wed., 23 Apr. 0.0351 0.0308 0.0332
20:01-21:00, Wed., 23 Apr. 0.0356 0.0300 0.0329
19:01-20:00, Wed., 23 Apr. 0.0349 0.0296 0.0329
18:01-19:00, Wed., 23 Apr. 0.0366 0.0301 0.0333
17:01-18:00, Wed., 23 Apr. 0.0356 0.0315 0.0337
16:01-17:00, Wed., 23 Apr. 0.0391 0.0329 0.0357
15:01-16:00, Wed., 23 Apr. 0.0443 0.0371 0.0407
14:01-15:00, Wed., 23 Apr. 0.0446 0.0377 0.0412
13:01-14:00, Wed., 23 Apr. 0.0399 0.0347 0.0377
12:01-13:00, Wed., 23 Apr. 0.0398 0.0347 0.0373
11:01-12:00, Wed., 23 Apr. 0.0398 0.0350 0.0374
10:01-11:00, Wed., 23 Apr. 0.0382 0.0338 0.0360
09:01-10:00, Wed., 23 Apr. 0.0390 0.0333 0.0357
08:01-09:00, Wed., 23 Apr. 0.0371 0.0325 0.0351
07:01-08:00, Wed., 23 Apr. 0.0370 0.0318 0.0342
06:01-07:00, Wed., 23 Apr. 0.0378 0.0318 0.0340
05:01-06:00, Wed., 23 Apr. 0.0419 0.0339 0.0371
04:01-05:00, Wed., 23 Apr. 0.0433 0.0369 0.0407
03:01-04:00, Wed., 23 Apr. 0.0464 0.0383 0.0422
02:01-03:00, Wed., 23 Apr. 0.0448 0.0390 0.0425
01:01-02:00, Wed., 23 Apr. 0.0417 0.0321 0.0364
00:01-01:00, Wed., 23 Apr. 0.0359 0.0314 0.0331
23:01-24:00, Tue., 22 Apr. 0.0356 0.0307 0.0333
22:01-23:00, Tue., 22 Apr. 0.0360 0.0308 0.0332
21:01-22:00, Tue., 22 Apr. 0.0360 0.0314 0.0332
20:01-21:00, Tue., 22 Apr. 0.0351 0.0313 0.0333
19:01-20:00, Tue., 22 Apr. 0.0346 0.0303 0.0329
18:01-19:00, Tue., 22 Apr. 0.0346 0.0311 0.0329
17:01-18:00, Tue., 22 Apr. 0.0351 0.0298 0.0327
16:01-17:00, Tue., 22 Apr. 0.0359 0.0310 0.0328
15:01-16:00, Tue., 22 Apr. 0.0355 0.0309 0.0329
14:01-15:00, Tue., 22 Apr. 0.0347 0.0300 0.0329
13:01-14:00, Tue., 22 Apr. 0.0349 0.0315 0.0332
12:01-13:00, Tue., 22 Apr. 0.0358 0.0311 0.0331
11:01-12:00, Tue., 22 Apr. 0.0349 0.0306 0.0328
10:01-11:00, Tue., 22 Apr. 0.0353 0.0311 0.0331
09:01-10:00, Tue., 22 Apr. 0.0367 0.0304 0.0334
08:01-09:00, Tue., 22 Apr. 0.0373 0.0319 0.0338
07:01-08:00, Tue., 22 Apr. 0.0358 0.0312 0.0340
06:01-07:00, Tue., 22 Apr. 0.0361 0.0317 0.0339
05:01-06:00, Tue., 22 Apr. 0.0370 0.0314 0.0338
04:01-05:00, Tue., 22 Apr. 0.0368 0.0313 0.0339
03:01-04:00, Tue., 22 Apr. 0.0363 0.0306 0.0335
02:01-03:00, Tue., 22 Apr. 0.0354 0.0303 0.0331
01:01-02:00, Tue., 22 Apr. 0.0353 0.0300 0.0330
00:01-01:00, Tue., 22 Apr. 0.0357 0.0299 0.0329
23:01-24:00, Mon., 21 Apr. 0.0349 0.0308 0.0326
22:01-23:00, Mon., 21 Apr. 0.0346 0.0301 0.0331
21:01-22:00, Mon., 21 Apr. 0.0370 0.0306 0.0330
20:01-21:00, Mon., 21 Apr. 0.0356 0.0314 0.0332
19:01-20:00, Mon., 21 Apr. 0.0357 0.0308 0.0331
18:01-19:00, Mon., 21 Apr. 0.0350 0.0295 0.0331
17:01-18:00, Mon., 21 Apr. 0.0352 0.0302 0.0328
16:01-17:00, Mon., 21 Apr. 0.0350 0.0312 0.0331
15:01-16:00, Mon., 21 Apr. 0.0355 0.0318 0.0334
14:01-15:00, Mon., 21 Apr. 0.0355 0.0312 0.0334
13:01-14:00, Mon., 21 Apr. 0.0356 0.0315 0.0333
12:01-13:00, Mon., 21 Apr. 0.0356 0.0309 0.0334
11:01-12:00, Mon., 21 Apr. 0.0357 0.0308 0.0330
10:01-11:00, Mon., 21 Apr. 0.0356 0.0309 0.0334
09:01-10:00, Mon., 21 Apr. 0.0352 0.0306 0.0330
08:01-09:00, Mon., 21 Apr. 0.0365 0.0315 0.0334
07:01-08:00, Mon., 21 Apr. 0.0363 0.0317 0.0337
06:01-07:00, Mon., 21 Apr. 0.0361 0.0316 0.0333
05:01-06:00, Mon., 21 Apr. 0.0360 0.0308 0.0335
04:01-05:00, Mon., 21 Apr. 0.0363 0.0318 0.0338
03:01-04:00, Mon., 21 Apr. 0.0358 0.0308 0.0335
02:01-03:00, Mon., 21 Apr. 0.0368 0.0318 0.0337
01:01-02:00, Mon., 21 Apr. 0.0360 0.0311 0.0336
00:01-01:00, Mon., 21 Apr. 0.0362 0.0316 0.0336
23:01-24:00, Sun., 20 Apr. 0.0363 0.0308 0.0333
22:01-23:00, Sun., 20 Apr. 0.0354 0.0311 0.0334
21:01-22:00, Sun., 20 Apr. 0.0361 0.0314 0.0334
20:01-21:00, Sun., 20 Apr. 0.0358 0.0305 0.0330
19:01-20:00, Sun., 20 Apr. 0.0345 0.0304 0.0327
18:01-19:00, Sun., 20 Apr. 0.0350 0.0304 0.0328
17:01-18:00, Sun., 20 Apr. 0.0355 0.0300 0.0331
16:01-17:00, Sun., 20 Apr. 0.0352 0.0304 0.0328
15:01-16:00, Sun., 20 Apr. 0.0356 0.0308 0.0328
14:01-15:00, Sun., 20 Apr. 0.0363 0.0287 0.0328
13:01-14:00, Sun., 20 Apr. 0.0350 0.0297 0.0327
12:01-13:00, Sun., 20 Apr. 0.0360 0.0306 0.0330
11:01-12:00, Sun., 20 Apr. 0.0353 0.0295 0.0327
10:01-11:00, Sun., 20 Apr. 0.0372 0.0315 0.0343
09:01-10:00, Sun., 20 Apr. 0.0367 0.0316 0.0346
08:01-09:00, Sun., 20 Apr. 0.0368 0.0315 0.0347
07:01-08:00, Sun., 20 Apr. 0.0390 0.0332 0.0352
06:01-07:00, Sun., 20 Apr. 0.0370 0.0328 0.0351
05:01-06:00, Sun., 20 Apr. 0.0379 0.0329 0.0352
04:01-05:00, Sun., 20 Apr. 0.0367 0.0320 0.0341
03:01-04:00, Sun., 20 Apr. 0.0360 0.0311 0.0337
02:01-03:00, Sun., 20 Apr. 0.0356 0.0308 0.0336
01:01-02:00, Sun., 20 Apr. 0.0353 0.0319 0.0334
00:01-01:00, Sun., 20 Apr. 0.0353 0.0310 0.0335
23:01-24:00, Sat., 19 Apr. 0.0358 0.0314 0.0335
22:01-23:00, Sat., 19 Apr. 0.0356 0.0313 0.0332
21:01-22:00, Sat., 19 Apr. 0.0349 0.0301 0.0331
20:01-21:00, Sat., 19 Apr. 0.0357 0.0304 0.0330
19:01-20:00, Sat., 19 Apr. 0.0349 0.0308 0.0330
18:01-19:00, Sat., 19 Apr. 0.0352 0.0305 0.0329
17:01-18:00, Sat., 19 Apr. 0.0349 0.0308 0.0330
16:01-17:00, Sat., 19 Apr. 0.0354 0.0316 0.0333
15:01-16:00, Sat., 19 Apr. 0.0354 0.0312 0.0334
14:01-15:00, Sat., 19 Apr. 0.0360 0.0313 0.0336
13:01-14:00, Sat., 19 Apr. 0.0369 0.0318 0.0335
12:01-13:00, Sat., 19 Apr. 0.0353 0.0311 0.0337
11:01-12:00, Sat., 19 Apr. 0.0365 0.0323 0.0343
10:01-11:00, Sat., 19 Apr. 0.0367 0.0320 0.0340
09:01-10:00, Sat., 19 Apr. 0.0367 0.0316 0.0340
08:01-09:00, Sat., 19 Apr. 0.0371 0.0315 0.0347
07:01-08:00, Sat., 19 Apr. 0.0376 0.0336 0.0356
06:01-07:00, Sat., 19 Apr. 0.0381 0.0337 0.0359
05:01-06:00, Sat., 19 Apr. 0.0377 0.0317 0.0348
04:01-05:00, Sat., 19 Apr. 0.0368 0.0311 0.0344
03:01-04:00, Sat., 19 Apr. 0.0368 0.0317 0.0341
02:01-03:00, Sat., 19 Apr. 0.0375 0.0325 0.0349
01:01-02:00, Sat., 19 Apr. 0.0362 0.0320 0.0343
00:01-01:00, Sat., 19 Apr. 0.0376 0.0319 0.0345
23:01-24:00, Fri., 18 Apr. 0.0363 0.0324 0.0342
22:01-23:00, Fri., 18 Apr. 0.0363 0.0311 0.0338
21:01-22:00, Fri., 18 Apr. 0.0360 0.0307 0.0336
20:01-21:00, Fri., 18 Apr. 0.0352 0.0305 0.0329
19:01-20:00, Fri., 18 Apr. 0.0346 0.0314 0.0328
18:01-19:00, Fri., 18 Apr. 0.0357 0.0306 0.0330
17:01-18:00, Fri., 18 Apr. 0.0347 0.0307 0.0326
16:01-17:00, Fri., 18 Apr. 0.0350 0.0302 0.0328
15:01-16:00, Fri., 18 Apr. 0.0349 0.0307 0.0330
14:01-15:00, Fri., 18 Apr. 0.0352 0.0308 0.0332
13:01-14:00, Fri., 18 Apr. 0.0354 0.0312 0.0330
12:01-13:00, Fri., 18 Apr. 0.0361 0.0316 0.0336
11:01-12:00, Fri., 18 Apr. 0.0362 0.0318 0.0339
10:01-11:00, Fri., 18 Apr. 0.0379 0.0318 0.0341
09:01-10:00, Fri., 18 Apr. 0.0363 0.0315 0.0340
08:01-09:00, Fri., 18 Apr. 0.0370 0.0321 0.0346
07:01-08:00, Fri., 18 Apr. 0.0382 0.0326 0.0350
06:01-07:00, Fri., 18 Apr. 0.0367 0.0306 0.0350
05:01-06:00, Fri., 18 Apr. 0.0377 0.0329 0.0350
04:01-05:00, Fri., 18 Apr. 0.0364 0.0321 0.0347
03:01-04:00, Fri., 18 Apr. 0.0370 0.0328 0.0344
02:01-03:00, Fri., 18 Apr. 0.0372 0.0324 0.0348
01:01-02:00, Fri., 18 Apr. 0.0384 0.0320 0.0343
00:01-01:00, Fri., 18 Apr. 0.0366 0.0322 0.0343
23:01-24:00, Thu., 17 Apr. 0.0366 0.0308 0.0344
22:01-23:00, Thu., 17 Apr. 0.0372 0.0318 0.0343
21:01-22:00, Thu., 17 Apr. 0.0365 0.0305 0.0333
20:01-21:00, Thu., 17 Apr. 0.0357 0.0309 0.0334
19:01-20:00, Thu., 17 Apr. 0.0356 0.0305 0.0331
18:01-19:00, Thu., 17 Apr. 0.0362 0.0308 0.0332
17:01-18:00, Thu., 17 Apr. 0.0351 0.0307 0.0329
16:01-17:00, Thu., 17 Apr. 0.0360 0.0311 0.0334
15:01-16:00, Thu., 17 Apr. 0.0360 0.0318 0.0337
14:01-15:00, Thu., 17 Apr. 0.0360 0.0314 0.0334
13:01-14:00, Thu., 17 Apr. 0.0360 0.0314 0.0333
12:01-13:00, Thu., 17 Apr. 0.0355 0.0307 0.0334
11:01-12:00, Thu., 17 Apr. 0.0360 0.0308 0.0333
10:01-11:00, Thu., 17 Apr. 0.0353 0.0312 0.0333
09:01-10:00, Thu., 17 Apr. 0.0361 0.0311 0.0333
08:01-09:00, Thu., 17 Apr. 0.0362 0.0322 0.0339
07:01-08:00, Thu., 17 Apr. 0.0360 0.0307 0.0336
06:01-07:00, Thu., 17 Apr. 0.0362 0.0307 0.0335
05:01-06:00, Thu., 17 Apr. 0.0350 0.0301 0.0334
04:01-05:00, Thu., 17 Apr. 0.0364 0.0308 0.0336
03:01-04:00, Thu., 17 Apr. 0.0354 0.0308 0.0333
02:01-03:00, Thu., 17 Apr. 0.0356 0.0304 0.0334
01:01-02:00, Thu., 17 Apr. 0.0359 0.0310 0.0334
00:01-01:00, Thu., 17 Apr. 0.0349 0.0313 0.0332
23:01-24:00, Wed., 16 Apr. 0.0351 0.0302 0.0328
22:01-23:00, Wed., 16 Apr. 0.0357 0.0304 0.0329
21:01-22:00, Wed., 16 Apr. 0.0356 0.0314 0.0332
20:01-21:00, Wed., 16 Apr. 0.0360 0.0309 0.0329
19:01-20:00, Wed., 16 Apr. 0.0354 0.0306 0.0330
18:01-19:00, Wed., 16 Apr. 0.0356 0.0309 0.0331
17:01-18:00, Wed., 16 Apr. 0.0346 0.0311 0.0330
16:01-17:00, Wed., 16 Apr. 0.0351 0.0317 0.0333
15:01-16:00, Wed., 16 Apr. 0.0362 0.0308 0.0336
14:01-15:00, Wed., 16 Apr. 0.0361 0.0310 0.0332
13:01-14:00, Wed., 16 Apr. 0.0357 0.0315 0.0335
12:01-13:00, Wed., 16 Apr. 0.0353 0.0314 0.0334