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, Sun., 23 Feb. 0.0360 0.0304 0.0330
10:01-11:00, Sun., 23 Feb. 0.0358 0.0308 0.0333
09:01-10:00, Sun., 23 Feb. 0.0355 0.0316 0.0334
08:01-09:00, Sun., 23 Feb. 0.0358 0.0307 0.0339
07:01-08:00, Sun., 23 Feb. 0.0361 0.0318 0.0338
06:01-07:00, Sun., 23 Feb. 0.0359 0.0317 0.0337
05:01-06:00, Sun., 23 Feb. 0.0357 0.0311 0.0333
04:01-05:00, Sun., 23 Feb. 0.0353 0.0297 0.0330
03:01-04:00, Sun., 23 Feb. 0.0362 0.0311 0.0341
02:01-03:00, Sun., 23 Feb. 0.0370 0.0316 0.0344
01:01-02:00, Sun., 23 Feb. 0.0367 0.0325 0.0343
00:01-01:00, Sun., 23 Feb. 0.0355 0.0315 0.0334
23:01-24:00, Sat., 22 Feb. 0.0365 0.0312 0.0333
22:01-23:00, Sat., 22 Feb. 0.0356 0.0311 0.0332
21:01-22:00, Sat., 22 Feb. 0.0360 0.0311 0.0332
20:01-21:00, Sat., 22 Feb. 0.0356 0.0311 0.0331
19:01-20:00, Sat., 22 Feb. 0.0364 0.0308 0.0331
18:01-19:00, Sat., 22 Feb. 0.0360 0.0304 0.0330
17:01-18:00, Sat., 22 Feb. 0.0362 0.0308 0.0332
16:01-17:00, Sat., 22 Feb. 0.0354 0.0308 0.0333
15:01-16:00, Sat., 22 Feb. 0.0364 0.0304 0.0334
14:01-15:00, Sat., 22 Feb. 0.0357 0.0314 0.0336
13:01-14:00, Sat., 22 Feb. 0.0360 0.0310 0.0334
12:01-13:00, Sat., 22 Feb. 0.0358 0.0312 0.0336
11:01-12:00, Sat., 22 Feb. 0.0353 0.0310 0.0334
10:01-11:00, Sat., 22 Feb. 0.0358 0.0315 0.0335
09:01-10:00, Sat., 22 Feb. 0.0361 0.0315 0.0338
08:01-09:00, Sat., 22 Feb. 0.0358 0.0311 0.0337
07:01-08:00, Sat., 22 Feb. 0.0358 0.0312 0.0339
06:01-07:00, Sat., 22 Feb. 0.0368 0.0317 0.0340
05:01-06:00, Sat., 22 Feb. 0.0353 0.0313 0.0334
04:01-05:00, Sat., 22 Feb. 0.0360 0.0315 0.0334
03:01-04:00, Sat., 22 Feb. 0.0364 0.0314 0.0334
02:01-03:00, Sat., 22 Feb. 0.0364 0.0308 0.0330
01:01-02:00, Sat., 22 Feb. 0.0348 0.0306 0.0331
00:01-01:00, Sat., 22 Feb. 0.0349 0.0305 0.0327
23:01-24:00, Fri., 21 Feb. 0.0349 0.0308 0.0331
22:01-23:00, Fri., 21 Feb. 0.0353 0.0299 0.0331
21:01-22:00, Fri., 21 Feb. 0.0367 0.0301 0.0332
20:01-21:00, Fri., 21 Feb. 0.0353 0.0308 0.0329
19:01-20:00, Fri., 21 Feb. 0.0353 0.0310 0.0328
18:01-19:00, Fri., 21 Feb. 0.0360 0.0308 0.0331
17:01-18:00, Fri., 21 Feb. 0.0349 0.0308 0.0328
16:01-17:00, Fri., 21 Feb. 0.0349 0.0311 0.0329
15:01-16:00, Fri., 21 Feb. 0.0355 0.0312 0.0331
14:01-15:00, Fri., 21 Feb. 0.0362 0.0301 0.0332
13:01-14:00, Fri., 21 Feb. 0.0363 0.0308 0.0336
12:01-13:00, Fri., 21 Feb. 0.0359 0.0310 0.0335
11:01-12:00, Fri., 21 Feb. 0.0356 0.0307 0.0330
10:01-11:00, Fri., 21 Feb. 0.0357 0.0314 0.0333
09:01-10:00, Fri., 21 Feb. 0.0370 0.0313 0.0335
08:01-09:00, Fri., 21 Feb. 0.0356 0.0318 0.0336
07:01-08:00, Fri., 21 Feb. 0.0359 0.0316 0.0335
06:01-07:00, Fri., 21 Feb. 0.0359 0.0310 0.0331
05:01-06:00, Fri., 21 Feb. 0.0352 0.0295 0.0333
04:01-05:00, Fri., 21 Feb. 0.0356 0.0309 0.0335
03:01-04:00, Fri., 21 Feb. 0.0356 0.0317 0.0332
02:01-03:00, Fri., 21 Feb. 0.0363 0.0311 0.0332
01:01-02:00, Fri., 21 Feb. 0.0353 0.0309 0.0330
00:01-01:00, Fri., 21 Feb. 0.0350 0.0310 0.0330
23:01-24:00, Thu., 20 Feb. 0.0357 0.0308 0.0328
22:01-23:00, Thu., 20 Feb. 0.0353 0.0316 0.0331
21:01-22:00, Thu., 20 Feb. 0.0353 0.0301 0.0326
20:01-21:00, Thu., 20 Feb. 0.0352 0.0301 0.0329
19:01-20:00, Thu., 20 Feb. 0.0348 0.0305 0.0328
18:01-19:00, Thu., 20 Feb. 0.0349 0.0305 0.0326
17:01-18:00, Thu., 20 Feb. 0.0353 0.0303 0.0326
16:01-17:00, Thu., 20 Feb. 0.0349 0.0303 0.0328
15:01-16:00, Thu., 20 Feb. 0.0359 0.0302 0.0333
14:01-15:00, Thu., 20 Feb. 0.0355 0.0308 0.0329
13:01-14:00, Thu., 20 Feb. 0.0356 0.0305 0.0328
12:01-13:00, Thu., 20 Feb. 0.0347 0.0303 0.0327
11:01-12:00, Thu., 20 Feb. 0.0348 0.0305 0.0328
10:01-11:00, Thu., 20 Feb. 0.0354 0.0308 0.0330
09:01-10:00, Thu., 20 Feb. 0.0367 0.0314 0.0333
08:01-09:00, Thu., 20 Feb. 0.0359 0.0322 0.0340
07:01-08:00, Thu., 20 Feb. 0.0362 0.0322 0.0338
06:01-07:00, Thu., 20 Feb. 0.0359 0.0310 0.0335
05:01-06:00, Thu., 20 Feb. 0.0349 0.0311 0.0329
04:01-05:00, Thu., 20 Feb. 0.0351 0.0308 0.0331
03:01-04:00, Thu., 20 Feb. 0.0351 0.0315 0.0332
02:01-03:00, Thu., 20 Feb. 0.0363 0.0304 0.0334
01:01-02:00, Thu., 20 Feb. 0.0355 0.0308 0.0332
00:01-01:00, Thu., 20 Feb. 0.0359 0.0314 0.0335
23:01-24:00, Wed., 19 Feb. 0.0350 0.0308 0.0331
22:01-23:00, Wed., 19 Feb. 0.0352 0.0308 0.0330
21:01-22:00, Wed., 19 Feb. 0.0358 0.0305 0.0332
20:01-21:00, Wed., 19 Feb. 0.0354 0.0308 0.0331
19:01-20:00, Wed., 19 Feb. 0.0353 0.0311 0.0332
18:01-19:00, Wed., 19 Feb. 0.0361 0.0310 0.0330
17:01-18:00, Wed., 19 Feb. 0.0346 0.0308 0.0329
16:01-17:00, Wed., 19 Feb. 0.0353 0.0308 0.0329
15:01-16:00, Wed., 19 Feb. 0.0348 0.0305 0.0328
14:01-15:00, Wed., 19 Feb. 0.0356 0.0305 0.0328
13:01-14:00, Wed., 19 Feb. 0.0363 0.0305 0.0331
12:01-13:00, Wed., 19 Feb. 0.0354 0.0310 0.0334
11:01-12:00, Wed., 19 Feb. 0.0356 0.0304 0.0332
10:01-11:00, Wed., 19 Feb. 0.0363 0.0304 0.0334
09:01-10:00, Wed., 19 Feb. 0.0361 0.0316 0.0335
08:01-09:00, Wed., 19 Feb. 0.0356 0.0312 0.0334
07:01-08:00, Wed., 19 Feb. 0.0356 0.0304 0.0332
06:01-07:00, Wed., 19 Feb. 0.0352 0.0311 0.0336
05:01-06:00, Wed., 19 Feb. 0.0365 0.0315 0.0339
04:01-05:00, Wed., 19 Feb. 0.0353 0.0315 0.0336
03:01-04:00, Wed., 19 Feb. 0.0367 0.0315 0.0338
02:01-03:00, Wed., 19 Feb. 0.0359 0.0318 0.0337
01:01-02:00, Wed., 19 Feb. 0.0356 0.0311 0.0338
00:01-01:00, Wed., 19 Feb. 0.0359 0.0322 0.0339
23:01-24:00, Tue., 18 Feb. 0.0367 0.0314 0.0336
22:01-23:00, Tue., 18 Feb. 0.0366 0.0308 0.0336
21:01-22:00, Tue., 18 Feb. 0.0356 0.0317 0.0337
20:01-21:00, Tue., 18 Feb. 0.0352 0.0307 0.0334
19:01-20:00, Tue., 18 Feb. 0.0360 0.0315 0.0335
18:01-19:00, Tue., 18 Feb. 0.0355 0.0309 0.0334
17:01-18:00, Tue., 18 Feb. 0.0360 0.0310 0.0337
16:01-17:00, Tue., 18 Feb. 0.0364 0.0299 0.0333
15:01-16:00, Tue., 18 Feb. 0.0359 0.0316 0.0333
14:01-15:00, Tue., 18 Feb. 0.0355 0.0315 0.0333
13:01-14:00, Tue., 18 Feb. 0.0358 0.0315 0.0335
12:01-13:00, Tue., 18 Feb. 0.0358 0.0304 0.0335
11:01-12:00, Tue., 18 Feb. 0.0359 0.0314 0.0335
10:01-11:00, Tue., 18 Feb. 0.0369 0.0311 0.0337
09:01-10:00, Tue., 18 Feb. 0.0356 0.0312 0.0337
08:01-09:00, Tue., 18 Feb. 0.0358 0.0317 0.0336
07:01-08:00, Tue., 18 Feb. 0.0360 0.0298 0.0336
06:01-07:00, Tue., 18 Feb. 0.0360 0.0316 0.0337
05:01-06:00, Tue., 18 Feb. 0.0370 0.0318 0.0338
04:01-05:00, Tue., 18 Feb. 0.0362 0.0311 0.0337
03:01-04:00, Tue., 18 Feb. 0.0361 0.0320 0.0341
02:01-03:00, Tue., 18 Feb. 0.0355 0.0322 0.0338
01:01-02:00, Tue., 18 Feb. 0.0369 0.0318 0.0343
00:01-01:00, Tue., 18 Feb. 0.0360 0.0316 0.0339
23:01-24:00, Mon., 17 Feb. 0.0370 0.0313 0.0337
22:01-23:00, Mon., 17 Feb. 0.0356 0.0318 0.0339
21:01-22:00, Mon., 17 Feb. 0.0361 0.0318 0.0338
20:01-21:00, Mon., 17 Feb. 0.0367 0.0318 0.0339
19:01-20:00, Mon., 17 Feb. 0.0363 0.0318 0.0340
18:01-19:00, Mon., 17 Feb. 0.0358 0.0318 0.0338
17:01-18:00, Mon., 17 Feb. 0.0367 0.0323 0.0340
16:01-17:00, Mon., 17 Feb. 0.0375 0.0321 0.0338
15:01-16:00, Mon., 17 Feb. 0.0358 0.0311 0.0335
14:01-15:00, Mon., 17 Feb. 0.0370 0.0315 0.0340
13:01-14:00, Mon., 17 Feb. 0.0362 0.0305 0.0339
12:01-13:00, Mon., 17 Feb. 0.0360 0.0315 0.0340
11:01-12:00, Mon., 17 Feb. 0.0376 0.0319 0.0342
10:01-11:00, Mon., 17 Feb. 0.0359 0.0303 0.0334
09:01-10:00, Mon., 17 Feb. 0.0371 0.0302 0.0335
08:01-09:00, Mon., 17 Feb. 0.0382 0.0311 0.0354
07:01-08:00, Mon., 17 Feb. 0.0388 0.0342 0.0362
06:01-07:00, Mon., 17 Feb. 0.0387 0.0332 0.0360
05:01-06:00, Mon., 17 Feb. 0.0377 0.0332 0.0353
04:01-05:00, Mon., 17 Feb. 0.0368 0.0317 0.0346
03:01-04:00, Mon., 17 Feb. 0.0358 0.0317 0.0338
02:01-03:00, Mon., 17 Feb. 0.0362 0.0314 0.0336
01:01-02:00, Mon., 17 Feb. 0.0359 0.0307 0.0332
00:01-01:00, Mon., 17 Feb. 0.0355 0.0309 0.0333
23:01-24:00, Sun., 16 Feb. 0.0366 0.0318 0.0338
22:01-23:00, Sun., 16 Feb. 0.0364 0.0308 0.0333
21:01-22:00, Sun., 16 Feb. 0.0356 0.0312 0.0333
20:01-21:00, Sun., 16 Feb. 0.0358 0.0302 0.0329
19:01-20:00, Sun., 16 Feb. 0.0357 0.0312 0.0330
18:01-19:00, Sun., 16 Feb. 0.0359 0.0311 0.0330
17:01-18:00, Sun., 16 Feb. 0.0355 0.0312 0.0332
16:01-17:00, Sun., 16 Feb. 0.0359 0.0308 0.0335
15:01-16:00, Sun., 16 Feb. 0.0356 0.0311 0.0332
14:01-15:00, Sun., 16 Feb. 0.0351 0.0317 0.0334
13:01-14:00, Sun., 16 Feb. 0.0349 0.0314 0.0332
12:01-13:00, Sun., 16 Feb. 0.0351 0.0305 0.0334
11:01-12:00, Sun., 16 Feb. 0.0355 0.0318 0.0336
10:01-11:00, Sun., 16 Feb. 0.0371 0.0321 0.0343
09:01-10:00, Sun., 16 Feb. 0.0368 0.0316 0.0343
08:01-09:00, Sun., 16 Feb. 0.0371 0.0331 0.0348
07:01-08:00, Sun., 16 Feb. 0.0381 0.0329 0.0352
06:01-07:00, Sun., 16 Feb. 0.0377 0.0317 0.0346
05:01-06:00, Sun., 16 Feb. 0.0377 0.0322 0.0345
04:01-05:00, Sun., 16 Feb. 0.0371 0.0320 0.0345
03:01-04:00, Sun., 16 Feb. 0.0362 0.0315 0.0340
02:01-03:00, Sun., 16 Feb. 0.0356 0.0317 0.0335
01:01-02:00, Sun., 16 Feb. 0.0370 0.0322 0.0338
00:01-01:00, Sun., 16 Feb. 0.0357 0.0312 0.0335
23:01-24:00, Sat., 15 Feb. 0.0346 0.0310 0.0329
22:01-23:00, Sat., 15 Feb. 0.0351 0.0302 0.0328
21:01-22:00, Sat., 15 Feb. 0.0356 0.0314 0.0329
20:01-21:00, Sat., 15 Feb. 0.0348 0.0302 0.0327
19:01-20:00, Sat., 15 Feb. 0.0350 0.0308 0.0327
18:01-19:00, Sat., 15 Feb. 0.0346 0.0301 0.0325
17:01-18:00, Sat., 15 Feb. 0.0352 0.0307 0.0325
16:01-17:00, Sat., 15 Feb. 0.0354 0.0308 0.0331
15:01-16:00, Sat., 15 Feb. 0.0352 0.0304 0.0331
14:01-15:00, Sat., 15 Feb. 0.0355 0.0311 0.0331
13:01-14:00, Sat., 15 Feb. 0.0360 0.0312 0.0333
12:01-13:00, Sat., 15 Feb. 0.0353 0.0309 0.0332
11:01-12:00, Sat., 15 Feb. 0.0358 0.0307 0.0331
10:01-11:00, Sat., 15 Feb. 0.0357 0.0301 0.0330
09:01-10:00, Sat., 15 Feb. 0.0363 0.0312 0.0333
08:01-09:00, Sat., 15 Feb. 0.0370 0.0330 0.0347
07:01-08:00, Sat., 15 Feb. 0.0371 0.0317 0.0347
06:01-07:00, Sat., 15 Feb. 0.0366 0.0325 0.0345
05:01-06:00, Sat., 15 Feb. 0.0354 0.0308 0.0334
04:01-05:00, Sat., 15 Feb. 0.0361 0.0314 0.0333
03:01-04:00, Sat., 15 Feb. 0.0356 0.0313 0.0335
02:01-03:00, Sat., 15 Feb. 0.0349 0.0308 0.0331
01:01-02:00, Sat., 15 Feb. 0.0361 0.0313 0.0334
00:01-01:00, Sat., 15 Feb. 0.0355 0.0315 0.0332
23:01-24:00, Fri., 14 Feb. 0.0349 0.0307 0.0330
22:01-23:00, Fri., 14 Feb. 0.0354 0.0311 0.0330
21:01-22:00, Fri., 14 Feb. 0.0355 0.0304 0.0330
20:01-21:00, Fri., 14 Feb. 0.0355 0.0303 0.0330
19:01-20:00, Fri., 14 Feb. 0.0350 0.0301 0.0328
18:01-19:00, Fri., 14 Feb. 0.0346 0.0301 0.0324
17:01-18:00, Fri., 14 Feb. 0.0348 0.0298 0.0328
16:01-17:00, Fri., 14 Feb. 0.0349 0.0305 0.0329
15:01-16:00, Fri., 14 Feb. 0.0356 0.0312 0.0334
14:01-15:00, Fri., 14 Feb. 0.0359 0.0315 0.0333
13:01-14:00, Fri., 14 Feb. 0.0363 0.0311 0.0336
12:01-13:00, Fri., 14 Feb. 0.0363 0.0318 0.0336
11:01-12:00, Fri., 14 Feb. 0.0356 0.0316 0.0337
10:01-11:00, Fri., 14 Feb. 0.0356 0.0315 0.0336
09:01-10:00, Fri., 14 Feb. 0.0361 0.0315 0.0343
08:01-09:00, Fri., 14 Feb. 0.0370 0.0317 0.0348
07:01-08:00, Fri., 14 Feb. 0.0374 0.0332 0.0353
06:01-07:00, Fri., 14 Feb. 0.0377 0.0333 0.0357
05:01-06:00, Fri., 14 Feb. 0.0379 0.0329 0.0352
04:01-05:00, Fri., 14 Feb. 0.0377 0.0330 0.0353
03:01-04:00, Fri., 14 Feb. 0.0375 0.0317 0.0340
02:01-03:00, Fri., 14 Feb. 0.0356 0.0311 0.0333
01:01-02:00, Fri., 14 Feb. 0.0356 0.0310 0.0332
00:01-01:00, Fri., 14 Feb. 0.0359 0.0308 0.0334
23:01-24:00, Thu., 13 Feb. 0.0354 0.0309 0.0329
22:01-23:00, Thu., 13 Feb. 0.0353 0.0315 0.0332
21:01-22:00, Thu., 13 Feb. 0.0353 0.0310 0.0330
20:01-21:00, Thu., 13 Feb. 0.0365 0.0314 0.0333
19:01-20:00, Thu., 13 Feb. 0.0351 0.0311 0.0332
18:01-19:00, Thu., 13 Feb. 0.0352 0.0305 0.0334
17:01-18:00, Thu., 13 Feb. 0.0365 0.0309 0.0333
16:01-17:00, Thu., 13 Feb. 0.0348 0.0312 0.0331
15:01-16:00, Thu., 13 Feb. 0.0357 0.0306 0.0335
14:01-15:00, Thu., 13 Feb. 0.0363 0.0315 0.0340
13:01-14:00, Thu., 13 Feb. 0.0369 0.0318 0.0340
12:01-13:00, Thu., 13 Feb. 0.0362 0.0309 0.0337