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
22:01-23:00, Mon., 20 Apr. 0.0353 0.0303 0.0331
21:01-22:00, Mon., 20 Apr. 0.0356 0.0301 0.0329
20:01-21:00, Mon., 20 Apr. 0.0350 0.0310 0.0330
19:01-20:00, Mon., 20 Apr. 0.0349 0.0309 0.0328
18:01-19:00, Mon., 20 Apr. 0.0351 0.0311 0.0330
17:01-18:00, Mon., 20 Apr. 0.0361 0.0310 0.0328
16:01-17:00, Mon., 20 Apr. 0.0360 0.0310 0.0332
15:01-16:00, Mon., 20 Apr. 0.0352 0.0312 0.0333
14:01-15:00, Mon., 20 Apr. 0.0361 0.0311 0.0336
13:01-14:00, Mon., 20 Apr. 0.0361 0.0315 0.0337
12:01-13:00, Mon., 20 Apr. 0.0361 0.0309 0.0335
11:01-12:00, Mon., 20 Apr. 0.0358 0.0315 0.0333
10:01-11:00, Mon., 20 Apr. 0.0367 0.0315 0.0338
09:01-10:00, Mon., 20 Apr. 0.0357 0.0310 0.0338
08:01-09:00, Mon., 20 Apr. 0.0356 0.0315 0.0337
07:01-08:00, Mon., 20 Apr. 0.0365 0.0316 0.0340
06:01-07:00, Mon., 20 Apr. 0.0359 0.0318 0.0337
05:01-06:00, Mon., 20 Apr. 0.0357 0.0316 0.0337
04:01-05:00, Mon., 20 Apr. 0.0357 0.0309 0.0336
03:01-04:00, Mon., 20 Apr. 0.0362 0.0318 0.0336
02:01-03:00, Mon., 20 Apr. 0.0362 0.0311 0.0337
01:01-02:00, Mon., 20 Apr. 0.0353 0.0294 0.0331
00:01-01:00, Mon., 20 Apr. 0.0353 0.0303 0.0333
23:01-24:00, Sun., 19 Apr. 0.0355 0.0302 0.0334
22:01-23:00, Sun., 19 Apr. 0.0348 0.0304 0.0329
21:01-22:00, Sun., 19 Apr. 0.0349 0.0304 0.0329
20:01-21:00, Sun., 19 Apr. 0.0362 0.0302 0.0331
19:01-20:00, Sun., 19 Apr. 0.0353 0.0307 0.0330
18:01-19:00, Sun., 19 Apr. 0.0349 0.0304 0.0328
17:01-18:00, Sun., 19 Apr. 0.0351 0.0308 0.0330
16:01-17:00, Sun., 19 Apr. 0.0364 0.0315 0.0332
15:01-16:00, Sun., 19 Apr. 0.0365 0.0315 0.0336
14:01-15:00, Sun., 19 Apr. 0.0372 0.0315 0.0335
13:01-14:00, Sun., 19 Apr. 0.0358 0.0304 0.0336
12:01-13:00, Sun., 19 Apr. 0.0357 0.0317 0.0337
11:01-12:00, Sun., 19 Apr. 0.0360 0.0312 0.0336
10:01-11:00, Sun., 19 Apr. 0.0363 0.0317 0.0340
09:01-10:00, Sun., 19 Apr. 0.0363 0.0320 0.0340
08:01-09:00, Sun., 19 Apr. 0.0381 0.0325 0.0343
07:01-08:00, Sun., 19 Apr. 0.0368 0.0325 0.0343
06:01-07:00, Sun., 19 Apr. 0.0370 0.0319 0.0345
05:01-06:00, Sun., 19 Apr. 0.0362 0.0319 0.0341
04:01-05:00, Sun., 19 Apr. 0.0368 0.0317 0.0341
03:01-04:00, Sun., 19 Apr. 0.0364 0.0308 0.0338
02:01-03:00, Sun., 19 Apr. 0.0374 0.0318 0.0339
01:01-02:00, Sun., 19 Apr. 0.0360 0.0306 0.0339
00:01-01:00, Sun., 19 Apr. 0.0362 0.0317 0.0336
23:01-24:00, Sat., 18 Apr. 0.0353 0.0311 0.0335
22:01-23:00, Sat., 18 Apr. 0.0353 0.0310 0.0329
21:01-22:00, Sat., 18 Apr. 0.0355 0.0304 0.0326
20:01-21:00, Sat., 18 Apr. 0.0345 0.0306 0.0326
19:01-20:00, Sat., 18 Apr. 0.0347 0.0307 0.0324
18:01-19:00, Sat., 18 Apr. 0.0347 0.0305 0.0326
17:01-18:00, Sat., 18 Apr. 0.0347 0.0304 0.0328
16:01-17:00, Sat., 18 Apr. 0.0346 0.0307 0.0327
15:01-16:00, Sat., 18 Apr. 0.0357 0.0308 0.0331
14:01-15:00, Sat., 18 Apr. 0.0352 0.0308 0.0331
13:01-14:00, Sat., 18 Apr. 0.0361 0.0292 0.0329
12:01-13:00, Sat., 18 Apr. 0.0355 0.0301 0.0327
11:01-12:00, Sat., 18 Apr. 0.0361 0.0308 0.0329
10:01-11:00, Sat., 18 Apr. 0.0359 0.0303 0.0329
09:01-10:00, Sat., 18 Apr. 0.0351 0.0305 0.0331
08:01-09:00, Sat., 18 Apr. 0.0362 0.0304 0.0334
07:01-08:00, Sat., 18 Apr. 0.0358 0.0306 0.0335
06:01-07:00, Sat., 18 Apr. 0.0357 0.0311 0.0335
05:01-06:00, Sat., 18 Apr. 0.0361 0.0317 0.0333
04:01-05:00, Sat., 18 Apr. 0.0357 0.0318 0.0335
03:01-04:00, Sat., 18 Apr. 0.0355 0.0317 0.0333
02:01-03:00, Sat., 18 Apr. 0.0351 0.0304 0.0328
01:01-02:00, Sat., 18 Apr. 0.0360 0.0301 0.0326
00:01-01:00, Sat., 18 Apr. 0.0350 0.0308 0.0325
23:01-24:00, Fri., 17 Apr. 0.0353 0.0308 0.0329
22:01-23:00, Fri., 17 Apr. 0.0349 0.0305 0.0327
21:01-22:00, Fri., 17 Apr. 0.0353 0.0312 0.0328
20:01-21:00, Fri., 17 Apr. 0.0350 0.0297 0.0326
19:01-20:00, Fri., 17 Apr. 0.0343 0.0311 0.0326
18:01-19:00, Fri., 17 Apr. 0.0350 0.0297 0.0324
17:01-18:00, Fri., 17 Apr. 0.0347 0.0307 0.0325
16:01-17:00, Fri., 17 Apr. 0.0358 0.0313 0.0330
15:01-16:00, Fri., 17 Apr. 0.0351 0.0308 0.0328
14:01-15:00, Fri., 17 Apr. 0.0352 0.0305 0.0329
13:01-14:00, Fri., 17 Apr. 0.0358 0.0306 0.0328
12:01-13:00, Fri., 17 Apr. 0.0355 0.0317 0.0334
11:01-12:00, Fri., 17 Apr. 0.0357 0.0311 0.0331
10:01-11:00, Fri., 17 Apr. 0.0349 0.0303 0.0327
09:01-10:00, Fri., 17 Apr. 0.0358 0.0308 0.0330
08:01-09:00, Fri., 17 Apr. 0.0348 0.0308 0.0330
07:01-08:00, Fri., 17 Apr. 0.0351 0.0306 0.0331
06:01-07:00, Fri., 17 Apr. 0.0349 0.0310 0.0327
05:01-06:00, Fri., 17 Apr. 0.0349 0.0307 0.0328
04:01-05:00, Fri., 17 Apr. 0.0355 0.0296 0.0328
03:01-04:00, Fri., 17 Apr. 0.0349 0.0298 0.0328
02:01-03:00, Fri., 17 Apr. 0.0347 0.0308 0.0327
01:01-02:00, Fri., 17 Apr. 0.0353 0.0299 0.0330
00:01-01:00, Fri., 17 Apr. 0.0343 0.0311 0.0328
23:01-24:00, Thu., 16 Apr. 0.0349 0.0307 0.0327
22:01-23:00, Thu., 16 Apr. 0.0351 0.0308 0.0327
21:01-22:00, Thu., 16 Apr. 0.0352 0.0304 0.0326
20:01-21:00, Thu., 16 Apr. 0.0346 0.0310 0.0327
19:01-20:00, Thu., 16 Apr. 0.0353 0.0297 0.0325
18:01-19:00, Thu., 16 Apr. 0.0352 0.0299 0.0324
17:01-18:00, Thu., 16 Apr. 0.0357 0.0307 0.0330
16:01-17:00, Thu., 16 Apr. 0.0358 0.0301 0.0327
15:01-16:00, Thu., 16 Apr. 0.0367 0.0315 0.0334
14:01-15:00, Thu., 16 Apr. 0.0354 0.0313 0.0336
13:01-14:00, Thu., 16 Apr. 0.0357 0.0312 0.0335
12:01-13:00, Thu., 16 Apr. 0.0349 0.0308 0.0329
11:01-12:00, Thu., 16 Apr. 0.0356 0.0308 0.0333
10:01-11:00, Thu., 16 Apr. 0.0353 0.0298 0.0329
09:01-10:00, Thu., 16 Apr. 0.0350 0.0310 0.0329
08:01-09:00, Thu., 16 Apr. 0.0349 0.0308 0.0329
07:01-08:00, Thu., 16 Apr. 0.0361 0.0311 0.0332
06:01-07:00, Thu., 16 Apr. 0.0350 0.0311 0.0331
05:01-06:00, Thu., 16 Apr. 0.0363 0.0315 0.0333
04:01-05:00, Thu., 16 Apr. 0.0361 0.0320 0.0340
03:01-04:00, Thu., 16 Apr. 0.0395 0.0335 0.0362
02:01-03:00, Thu., 16 Apr. 0.0412 0.0346 0.0383
01:01-02:00, Thu., 16 Apr. 0.0397 0.0339 0.0372
00:01-01:00, Thu., 16 Apr. 0.0403 0.0361 0.0379
23:01-24:00, Wed., 15 Apr. 0.0447 0.0377 0.0402
22:01-23:00, Wed., 15 Apr. 0.0477 0.0422 0.0448
21:01-22:00, Wed., 15 Apr. 0.0501 0.0444 0.0469
20:01-21:00, Wed., 15 Apr. 0.0502 0.0423 0.0461
19:01-20:00, Wed., 15 Apr. 0.0458 0.0350 0.0400
18:01-19:00, Wed., 15 Apr. 0.0395 0.0322 0.0362
17:01-18:00, Wed., 15 Apr. 0.0354 0.0311 0.0330
16:01-17:00, Wed., 15 Apr. 0.0355 0.0303 0.0328
15:01-16:00, Wed., 15 Apr. 0.0363 0.0306 0.0333
14:01-15:00, Wed., 15 Apr. 0.0353 0.0310 0.0331
13:01-14:00, Wed., 15 Apr. 0.0349 0.0302 0.0330
12:01-13:00, Wed., 15 Apr. 0.0349 0.0304 0.0331
11:01-12:00, Wed., 15 Apr. 0.0363 0.0308 0.0333
10:01-11:00, Wed., 15 Apr. 0.0360 0.0313 0.0336
09:01-10:00, Wed., 15 Apr. 0.0380 0.0314 0.0335
08:01-09:00, Wed., 15 Apr. 0.0353 0.0314 0.0332
07:01-08:00, Wed., 15 Apr. 0.0357 0.0317 0.0337
06:01-07:00, Wed., 15 Apr. 0.0366 0.0316 0.0337
05:01-06:00, Wed., 15 Apr. 0.0369 0.0312 0.0334
04:01-05:00, Wed., 15 Apr. 0.0355 0.0318 0.0335
03:01-04:00, Wed., 15 Apr. 0.0356 0.0304 0.0330
02:01-03:00, Wed., 15 Apr. 0.0352 0.0308 0.0330
01:01-02:00, Wed., 15 Apr. 0.0355 0.0308 0.0328
00:01-01:00, Wed., 15 Apr. 0.0350 0.0304 0.0329
23:01-24:00, Tue., 14 Apr. 0.0356 0.0309 0.0330
22:01-23:00, Tue., 14 Apr. 0.0349 0.0311 0.0329
21:01-22:00, Tue., 14 Apr. 0.0349 0.0306 0.0327
20:01-21:00, Tue., 14 Apr. 0.0349 0.0307 0.0329
19:01-20:00, Tue., 14 Apr. 0.0351 0.0305 0.0328
18:01-19:00, Tue., 14 Apr. 0.0354 0.0304 0.0329
17:01-18:00, Tue., 14 Apr. 0.0351 0.0306 0.0329
16:01-17:00, Tue., 14 Apr. 0.0354 0.0307 0.0330
15:01-16:00, Tue., 14 Apr. 0.0367 0.0308 0.0333
14:01-15:00, Tue., 14 Apr. 0.0353 0.0308 0.0334
13:01-14:00, Tue., 14 Apr. 0.0364 0.0300 0.0336
12:01-13:00, Tue., 14 Apr. 0.0354 0.0306 0.0334
11:01-12:00, Tue., 14 Apr. 0.0360 0.0315 0.0333
10:01-11:00, Tue., 14 Apr. 0.0374 0.0320 0.0343
09:01-10:00, Tue., 14 Apr. 0.0370 0.0319 0.0342
08:01-09:00, Tue., 14 Apr. 0.0365 0.0326 0.0342
07:01-08:00, Tue., 14 Apr. 0.0369 0.0318 0.0345
06:01-07:00, Tue., 14 Apr. 0.0369 0.0312 0.0342
05:01-06:00, Tue., 14 Apr. 0.0366 0.0311 0.0341
04:01-05:00, Tue., 14 Apr. 0.0366 0.0321 0.0342
03:01-04:00, Tue., 14 Apr. 0.0361 0.0318 0.0341
02:01-03:00, Tue., 14 Apr. 0.0365 0.0321 0.0343
01:01-02:00, Tue., 14 Apr. 0.0361 0.0315 0.0338
00:01-01:00, Tue., 14 Apr. 0.0361 0.0314 0.0333
23:01-24:00, Mon., 13 Apr. 0.0353 0.0310 0.0332
22:01-23:00, Mon., 13 Apr. 0.0360 0.0308 0.0330
21:01-22:00, Mon., 13 Apr. 0.0354 0.0297 0.0328
20:01-21:00, Mon., 13 Apr. 0.0357 0.0310 0.0329
19:01-20:00, Mon., 13 Apr. 0.0347 0.0307 0.0328
18:01-19:00, Mon., 13 Apr. 0.0358 0.0311 0.0328
17:01-18:00, Mon., 13 Apr. 0.0349 0.0311 0.0329
16:01-17:00, Mon., 13 Apr. 0.0360 0.0309 0.0332
15:01-16:00, Mon., 13 Apr. 0.0355 0.0311 0.0334
14:01-15:00, Mon., 13 Apr. 0.0353 0.0315 0.0332
13:01-14:00, Mon., 13 Apr. 0.0357 0.0306 0.0332
12:01-13:00, Mon., 13 Apr. 0.0352 0.0311 0.0334
11:01-12:00, Mon., 13 Apr. 0.0365 0.0309 0.0336
10:01-11:00, Mon., 13 Apr. 0.0379 0.0318 0.0342
09:01-10:00, Mon., 13 Apr. 0.0364 0.0311 0.0339
08:01-09:00, Mon., 13 Apr. 0.0365 0.0312 0.0340
07:01-08:00, Mon., 13 Apr. 0.0360 0.0318 0.0341
06:01-07:00, Mon., 13 Apr. 0.0371 0.0320 0.0342
05:01-06:00, Mon., 13 Apr. 0.0362 0.0318 0.0344
04:01-05:00, Mon., 13 Apr. 0.0370 0.0320 0.0344
03:01-04:00, Mon., 13 Apr. 0.0361 0.0315 0.0341
02:01-03:00, Mon., 13 Apr. 0.0370 0.0318 0.0340
01:01-02:00, Mon., 13 Apr. 0.0369 0.0321 0.0346
00:01-01:00, Mon., 13 Apr. 0.0370 0.0320 0.0346
23:01-24:00, Sun., 12 Apr. 0.0363 0.0320 0.0339
22:01-23:00, Sun., 12 Apr. 0.0362 0.0310 0.0333
21:01-22:00, Sun., 12 Apr. 0.0363 0.0309 0.0332
20:01-21:00, Sun., 12 Apr. 0.0356 0.0308 0.0331
19:01-20:00, Sun., 12 Apr. 0.0354 0.0305 0.0330
18:01-19:00, Sun., 12 Apr. 0.0349 0.0297 0.0328
17:01-18:00, Sun., 12 Apr. 0.0355 0.0307 0.0333
16:01-17:00, Sun., 12 Apr. 0.0353 0.0303 0.0333
15:01-16:00, Sun., 12 Apr. 0.0360 0.0311 0.0333
14:01-15:00, Sun., 12 Apr. 0.0355 0.0307 0.0335
13:01-14:00, Sun., 12 Apr. 0.0364 0.0314 0.0337
12:01-13:00, Sun., 12 Apr. 0.0358 0.0310 0.0337
11:01-12:00, Sun., 12 Apr. 0.0352 0.0317 0.0337
10:01-11:00, Sun., 12 Apr. 0.0358 0.0309 0.0335
09:01-10:00, Sun., 12 Apr. 0.0356 0.0311 0.0333
08:01-09:00, Sun., 12 Apr. 0.0356 0.0310 0.0336
07:01-08:00, Sun., 12 Apr. 0.0356 0.0305 0.0332
06:01-07:00, Sun., 12 Apr. 0.0360 0.0309 0.0335
05:01-06:00, Sun., 12 Apr. 0.0360 0.0314 0.0334
04:01-05:00, Sun., 12 Apr. 0.0353 0.0306 0.0332
03:01-04:00, Sun., 12 Apr. 0.0367 0.0316 0.0336
02:01-03:00, Sun., 12 Apr. 0.0357 0.0310 0.0335
01:01-02:00, Sun., 12 Apr. 0.0356 0.0308 0.0334
00:01-01:00, Sun., 12 Apr. 0.0356 0.0317 0.0335
23:01-24:00, Sat., 11 Apr. 0.0355 0.0314 0.0333
22:01-23:00, Sat., 11 Apr. 0.0360 0.0306 0.0333
21:01-22:00, Sat., 11 Apr. 0.0350 0.0308 0.0333
20:01-21:00, Sat., 11 Apr. 0.0356 0.0311 0.0333
19:01-20:00, Sat., 11 Apr. 0.0362 0.0311 0.0335
18:01-19:00, Sat., 11 Apr. 0.0362 0.0310 0.0338
17:01-18:00, Sat., 11 Apr. 0.0362 0.0315 0.0340
16:01-17:00, Sat., 11 Apr. 0.0364 0.0318 0.0341
15:01-16:00, Sat., 11 Apr. 0.0365 0.0315 0.0340
14:01-15:00, Sat., 11 Apr. 0.0364 0.0327 0.0344
13:01-14:00, Sat., 11 Apr. 0.0370 0.0322 0.0341
12:01-13:00, Sat., 11 Apr. 0.0364 0.0319 0.0342
11:01-12:00, Sat., 11 Apr. 0.0368 0.0313 0.0344
10:01-11:00, Sat., 11 Apr. 0.0368 0.0311 0.0345
09:01-10:00, Sat., 11 Apr. 0.0371 0.0319 0.0344
08:01-09:00, Sat., 11 Apr. 0.0365 0.0326 0.0346
07:01-08:00, Sat., 11 Apr. 0.0367 0.0315 0.0345
06:01-07:00, Sat., 11 Apr. 0.0375 0.0333 0.0349
05:01-06:00, Sat., 11 Apr. 0.0372 0.0322 0.0343
04:01-05:00, Sat., 11 Apr. 0.0361 0.0315 0.0342
03:01-04:00, Sat., 11 Apr. 0.0364 0.0323 0.0341
02:01-03:00, Sat., 11 Apr. 0.0360 0.0313 0.0336
01:01-02:00, Sat., 11 Apr. 0.0356 0.0315 0.0336
00:01-01:00, Sat., 11 Apr. 0.0364 0.0316 0.0341
23:01-24:00, Fri., 10 Apr. 0.0368 0.0313 0.0336