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, Sat., 29 Mar. 0.0353 0.0302 0.0328
21:01-22:00, Sat., 29 Mar. 0.0358 0.0311 0.0333
20:01-21:00, Sat., 29 Mar. 0.0367 0.0328 0.0346
19:01-20:00, Sat., 29 Mar. 0.0377 0.0332 0.0351
18:01-19:00, Sat., 29 Mar. 0.0394 0.0343 0.0366
17:01-18:00, Sat., 29 Mar. 0.0431 0.0370 0.0398
16:01-17:00, Sat., 29 Mar. 0.0457 0.0395 0.0420
15:01-16:00, Sat., 29 Mar. 0.0455 0.0381 0.0421
14:01-15:00, Sat., 29 Mar. 0.0444 0.0394 0.0415
13:01-14:00, Sat., 29 Mar. 0.0462 0.0416 0.0441
12:01-13:00, Sat., 29 Mar. 0.0509 0.0433 0.0471
11:01-12:00, Sat., 29 Mar. 0.0555 0.0480 0.0523
10:01-11:00, Sat., 29 Mar. 0.0603 0.0523 0.0567
09:01-10:00, Sat., 29 Mar. 0.0583 0.0520 0.0555
08:01-09:00, Sat., 29 Mar. 0.0588 0.0496 0.0535
07:01-08:00, Sat., 29 Mar. 0.0510 0.0367 0.0439
06:01-07:00, Sat., 29 Mar. 0.0425 0.0361 0.0388
05:01-06:00, Sat., 29 Mar. 0.0398 0.0334 0.0374
04:01-05:00, Sat., 29 Mar. 0.0355 0.0308 0.0335
03:01-04:00, Sat., 29 Mar. 0.0357 0.0317 0.0337
02:01-03:00, Sat., 29 Mar. 0.0358 0.0308 0.0334
01:01-02:00, Sat., 29 Mar. 0.0352 0.0302 0.0335
00:01-01:00, Sat., 29 Mar. 0.0352 0.0306 0.0334
23:01-24:00, Fri., 28 Mar. 0.0359 0.0316 0.0337
22:01-23:00, Fri., 28 Mar. 0.0360 0.0314 0.0341
21:01-22:00, Fri., 28 Mar. 0.0373 0.0322 0.0348
20:01-21:00, Fri., 28 Mar. 0.0407 0.0332 0.0373
19:01-20:00, Fri., 28 Mar. 0.0441 0.0381 0.0412
18:01-19:00, Fri., 28 Mar. 0.0405 0.0314 0.0351
17:01-18:00, Fri., 28 Mar. 0.0358 0.0304 0.0338
16:01-17:00, Fri., 28 Mar. 0.0370 0.0315 0.0337
15:01-16:00, Fri., 28 Mar. 0.0360 0.0317 0.0335
14:01-15:00, Fri., 28 Mar. 0.0367 0.0307 0.0334
13:01-14:00, Fri., 28 Mar. 0.0363 0.0320 0.0338
12:01-13:00, Fri., 28 Mar. 0.0360 0.0317 0.0339
11:01-12:00, Fri., 28 Mar. 0.0361 0.0318 0.0341
10:01-11:00, Fri., 28 Mar. 0.0367 0.0322 0.0346
09:01-10:00, Fri., 28 Mar. 0.0391 0.0332 0.0360
08:01-09:00, Fri., 28 Mar. 0.0449 0.0356 0.0405
07:01-08:00, Fri., 28 Mar. 0.0431 0.0355 0.0400
06:01-07:00, Fri., 28 Mar. 0.0384 0.0323 0.0347
05:01-06:00, Fri., 28 Mar. 0.0355 0.0306 0.0335
04:01-05:00, Fri., 28 Mar. 0.0351 0.0319 0.0338
03:01-04:00, Fri., 28 Mar. 0.0356 0.0306 0.0333
02:01-03:00, Fri., 28 Mar. 0.0356 0.0311 0.0332
01:01-02:00, Fri., 28 Mar. 0.0349 0.0314 0.0332
00:01-01:00, Fri., 28 Mar. 0.0356 0.0308 0.0332
23:01-24:00, Thu., 27 Mar. 0.0353 0.0306 0.0330
22:01-23:00, Thu., 27 Mar. 0.0360 0.0304 0.0330
21:01-22:00, Thu., 27 Mar. 0.0356 0.0304 0.0329
20:01-21:00, Thu., 27 Mar. 0.0367 0.0290 0.0331
19:01-20:00, Thu., 27 Mar. 0.0353 0.0304 0.0331
18:01-19:00, Thu., 27 Mar. 0.0354 0.0305 0.0330
17:01-18:00, Thu., 27 Mar. 0.0352 0.0304 0.0333
16:01-17:00, Thu., 27 Mar. 0.0357 0.0315 0.0335
15:01-16:00, Thu., 27 Mar. 0.0367 0.0308 0.0337
14:01-15:00, Thu., 27 Mar. 0.0364 0.0317 0.0338
13:01-14:00, Thu., 27 Mar. 0.0361 0.0312 0.0340
12:01-13:00, Thu., 27 Mar. 0.0359 0.0312 0.0339
11:01-12:00, Thu., 27 Mar. 0.0372 0.0312 0.0340
10:01-11:00, Thu., 27 Mar. 0.0374 0.0318 0.0340
09:01-10:00, Thu., 27 Mar. 0.0391 0.0315 0.0342
08:01-09:00, Thu., 27 Mar. 0.0365 0.0318 0.0342
07:01-08:00, Thu., 27 Mar. 0.0364 0.0322 0.0342
06:01-07:00, Thu., 27 Mar. 0.0364 0.0318 0.0340
05:01-06:00, Thu., 27 Mar. 0.0370 0.0316 0.0336
04:01-05:00, Thu., 27 Mar. 0.0357 0.0321 0.0336
03:01-04:00, Thu., 27 Mar. 0.0361 0.0307 0.0336
02:01-03:00, Thu., 27 Mar. 0.0364 0.0315 0.0336
01:01-02:00, Thu., 27 Mar. 0.0358 0.0310 0.0336
00:01-01:00, Thu., 27 Mar. 0.0368 0.0317 0.0338
23:01-24:00, Wed., 26 Mar. 0.0379 0.0311 0.0340
22:01-23:00, Wed., 26 Mar. 0.0368 0.0308 0.0339
21:01-22:00, Wed., 26 Mar. 0.0371 0.0311 0.0335
20:01-21:00, Wed., 26 Mar. 0.0356 0.0304 0.0337
19:01-20:00, Wed., 26 Mar. 0.0359 0.0309 0.0334
18:01-19:00, Wed., 26 Mar. 0.0357 0.0304 0.0332
17:01-18:00, Wed., 26 Mar. 0.0356 0.0308 0.0336
16:01-17:00, Wed., 26 Mar. 0.0362 0.0307 0.0336
15:01-16:00, Wed., 26 Mar. 0.0368 0.0319 0.0339
14:01-15:00, Wed., 26 Mar. 0.0366 0.0314 0.0341
13:01-14:00, Wed., 26 Mar. 0.0361 0.0322 0.0342
12:01-13:00, Wed., 26 Mar. 0.0374 0.0316 0.0342
11:01-12:00, Wed., 26 Mar. 0.0361 0.0321 0.0339
10:01-11:00, Wed., 26 Mar. 0.0365 0.0322 0.0342
09:01-10:00, Wed., 26 Mar. 0.0367 0.0317 0.0340
08:01-09:00, Wed., 26 Mar. 0.0361 0.0308 0.0340
07:01-08:00, Wed., 26 Mar. 0.0370 0.0313 0.0342
06:01-07:00, Wed., 26 Mar. 0.0363 0.0323 0.0339
05:01-06:00, Wed., 26 Mar. 0.0363 0.0309 0.0335
04:01-05:00, Wed., 26 Mar. 0.0356 0.0307 0.0336
03:01-04:00, Wed., 26 Mar. 0.0359 0.0307 0.0335
02:01-03:00, Wed., 26 Mar. 0.0360 0.0304 0.0336
01:01-02:00, Wed., 26 Mar. 0.0349 0.0307 0.0334
00:01-01:00, Wed., 26 Mar. 0.0358 0.0313 0.0335
23:01-24:00, Tue., 25 Mar. 0.0369 0.0318 0.0339
22:01-23:00, Tue., 25 Mar. 0.0362 0.0318 0.0340
21:01-22:00, Tue., 25 Mar. 0.0362 0.0312 0.0341
20:01-21:00, Tue., 25 Mar. 0.0363 0.0318 0.0336
19:01-20:00, Tue., 25 Mar. 0.0360 0.0306 0.0335
18:01-19:00, Tue., 25 Mar. 0.0359 0.0315 0.0333
17:01-18:00, Tue., 25 Mar. 0.0363 0.0316 0.0336
16:01-17:00, Tue., 25 Mar. 0.0363 0.0314 0.0339
15:01-16:00, Tue., 25 Mar. 0.0362 0.0317 0.0339
14:01-15:00, Tue., 25 Mar. 0.0371 0.0317 0.0338
13:01-14:00, Tue., 25 Mar. 0.0366 0.0304 0.0336
12:01-13:00, Tue., 25 Mar. 0.0360 0.0313 0.0336
11:01-12:00, Tue., 25 Mar. 0.0358 0.0310 0.0334
10:01-11:00, Tue., 25 Mar. 0.0353 0.0299 0.0333
09:01-10:00, Tue., 25 Mar. 0.0365 0.0315 0.0338
08:01-09:00, Tue., 25 Mar. 0.0366 0.0324 0.0339
07:01-08:00, Tue., 25 Mar. 0.0363 0.0322 0.0342
06:01-07:00, Tue., 25 Mar. 0.0367 0.0317 0.0340
05:01-06:00, Tue., 25 Mar. 0.0368 0.0313 0.0338
04:01-05:00, Tue., 25 Mar. 0.0361 0.0318 0.0340
03:01-04:00, Tue., 25 Mar. 0.0361 0.0318 0.0339
02:01-03:00, Tue., 25 Mar. 0.0363 0.0320 0.0339
01:01-02:00, Tue., 25 Mar. 0.0363 0.0315 0.0338
00:01-01:00, Tue., 25 Mar. 0.0356 0.0315 0.0335
23:01-24:00, Mon., 24 Mar. 0.0368 0.0308 0.0339
22:01-23:00, Mon., 24 Mar. 0.0364 0.0320 0.0336
21:01-22:00, Mon., 24 Mar. 0.0363 0.0316 0.0336
20:01-21:00, Mon., 24 Mar. 0.0350 0.0308 0.0330
19:01-20:00, Mon., 24 Mar. 0.0357 0.0299 0.0333
18:01-19:00, Mon., 24 Mar. 0.0354 0.0308 0.0333
17:01-18:00, Mon., 24 Mar. 0.0358 0.0308 0.0333
16:01-17:00, Mon., 24 Mar. 0.0355 0.0313 0.0333
15:01-16:00, Mon., 24 Mar. 0.0348 0.0308 0.0333
14:01-15:00, Mon., 24 Mar. 0.0357 0.0310 0.0332
13:01-14:00, Mon., 24 Mar. 0.0356 0.0305 0.0333
12:01-13:00, Mon., 24 Mar. 0.0360 0.0311 0.0331
11:01-12:00, Mon., 24 Mar. 0.0362 0.0317 0.0340
10:01-11:00, Mon., 24 Mar. 0.0358 0.0310 0.0338
09:01-10:00, Mon., 24 Mar. 0.0364 0.0315 0.0340
08:01-09:00, Mon., 24 Mar. 0.0365 0.0314 0.0338
07:01-08:00, Mon., 24 Mar. 0.0356 0.0314 0.0336
06:01-07:00, Mon., 24 Mar. 0.0369 0.0315 0.0336
05:01-06:00, Mon., 24 Mar. 0.0356 0.0320 0.0338
04:01-05:00, Mon., 24 Mar. 0.0356 0.0316 0.0336
03:01-04:00, Mon., 24 Mar. 0.0361 0.0308 0.0331
02:01-03:00, Mon., 24 Mar. 0.0360 0.0312 0.0331
01:01-02:00, Mon., 24 Mar. 0.0361 0.0305 0.0332
00:01-01:00, Mon., 24 Mar. 0.0354 0.0312 0.0331
23:01-24:00, Sun., 23 Mar. 0.0356 0.0313 0.0333
22:01-23:00, Sun., 23 Mar. 0.0357 0.0313 0.0332
21:01-22:00, Sun., 23 Mar. 0.0359 0.0306 0.0330
20:01-21:00, Sun., 23 Mar. 0.0352 0.0309 0.0329
19:01-20:00, Sun., 23 Mar. 0.0356 0.0311 0.0335
18:01-19:00, Sun., 23 Mar. 0.0360 0.0308 0.0333
17:01-18:00, Sun., 23 Mar. 0.0360 0.0311 0.0332
16:01-17:00, Sun., 23 Mar. 0.0361 0.0315 0.0334
15:01-16:00, Sun., 23 Mar. 0.0353 0.0319 0.0336
14:01-15:00, Sun., 23 Mar. 0.0361 0.0312 0.0336
13:01-14:00, Sun., 23 Mar. 0.0365 0.0316 0.0338
12:01-13:00, Sun., 23 Mar. 0.0360 0.0314 0.0335
11:01-12:00, Sun., 23 Mar. 0.0356 0.0316 0.0340
10:01-11:00, Sun., 23 Mar. 0.0363 0.0317 0.0337
09:01-10:00, Sun., 23 Mar. 0.0372 0.0320 0.0345
08:01-09:00, Sun., 23 Mar. 0.0375 0.0322 0.0345
07:01-08:00, Sun., 23 Mar. 0.0360 0.0314 0.0334
06:01-07:00, Sun., 23 Mar. 0.0349 0.0315 0.0332
05:01-06:00, Sun., 23 Mar. 0.0362 0.0304 0.0332
04:01-05:00, Sun., 23 Mar. 0.0360 0.0317 0.0334
03:01-04:00, Sun., 23 Mar. 0.0359 0.0302 0.0331
02:01-03:00, Sun., 23 Mar. 0.0349 0.0310 0.0330
01:01-02:00, Sun., 23 Mar. 0.0356 0.0304 0.0329
00:01-01:00, Sun., 23 Mar. 0.0360 0.0314 0.0333
23:01-24:00, Sat., 22 Mar. 0.0362 0.0311 0.0330
22:01-23:00, Sat., 22 Mar. 0.0351 0.0318 0.0333
21:01-22:00, Sat., 22 Mar. 0.0365 0.0315 0.0334
20:01-21:00, Sat., 22 Mar. 0.0353 0.0314 0.0334
19:01-20:00, Sat., 22 Mar. 0.0353 0.0310 0.0335
18:01-19:00, Sat., 22 Mar. 0.0359 0.0311 0.0332
17:01-18:00, Sat., 22 Mar. 0.0353 0.0307 0.0332
16:01-17:00, Sat., 22 Mar. 0.0367 0.0315 0.0336
15:01-16:00, Sat., 22 Mar. 0.0356 0.0316 0.0336
14:01-15:00, Sat., 22 Mar. 0.0356 0.0313 0.0336
13:01-14:00, Sat., 22 Mar. 0.0370 0.0314 0.0335
12:01-13:00, Sat., 22 Mar. 0.0353 0.0311 0.0334
11:01-12:00, Sat., 22 Mar. 0.0350 0.0308 0.0331
10:01-11:00, Sat., 22 Mar. 0.0363 0.0312 0.0336
09:01-10:00, Sat., 22 Mar. 0.0363 0.0315 0.0337
08:01-09:00, Sat., 22 Mar. 0.0358 0.0313 0.0339
07:01-08:00, Sat., 22 Mar. 0.0360 0.0311 0.0339
06:01-07:00, Sat., 22 Mar. 0.0370 0.0322 0.0343
05:01-06:00, Sat., 22 Mar. 0.0367 0.0322 0.0342
04:01-05:00, Sat., 22 Mar. 0.0364 0.0308 0.0340
03:01-04:00, Sat., 22 Mar. 0.0372 0.0322 0.0341
02:01-03:00, Sat., 22 Mar. 0.0362 0.0313 0.0339
01:01-02:00, Sat., 22 Mar. 0.0359 0.0318 0.0337
00:01-01:00, Sat., 22 Mar. 0.0367 0.0310 0.0335
23:01-24:00, Fri., 21 Mar. 0.0352 0.0315 0.0332
22:01-23:00, Fri., 21 Mar. 0.0356 0.0315 0.0335
21:01-22:00, Fri., 21 Mar. 0.0360 0.0315 0.0335
20:01-21:00, Fri., 21 Mar. 0.0350 0.0315 0.0335
19:01-20:00, Fri., 21 Mar. 0.0355 0.0308 0.0334
18:01-19:00, Fri., 21 Mar. 0.0359 0.0315 0.0334
17:01-18:00, Fri., 21 Mar. 0.0365 0.0307 0.0332
16:01-17:00, Fri., 21 Mar. 0.0362 0.0310 0.0332
15:01-16:00, Fri., 21 Mar. 0.0362 0.0302 0.0336
14:01-15:00, Fri., 21 Mar. 0.0362 0.0311 0.0333
13:01-14:00, Fri., 21 Mar. 0.0351 0.0317 0.0334
12:01-13:00, Fri., 21 Mar. 0.0364 0.0308 0.0331
11:01-12:00, Fri., 21 Mar. 0.0356 0.0310 0.0332
10:01-11:00, Fri., 21 Mar. 0.0357 0.0311 0.0333
09:01-10:00, Fri., 21 Mar. 0.0361 0.0309 0.0335
08:01-09:00, Fri., 21 Mar. 0.0366 0.0322 0.0342
07:01-08:00, Fri., 21 Mar. 0.0376 0.0321 0.0349
06:01-07:00, Fri., 21 Mar. 0.0370 0.0325 0.0349
05:01-06:00, Fri., 21 Mar. 0.0374 0.0327 0.0350
04:01-05:00, Fri., 21 Mar. 0.0373 0.0329 0.0350
03:01-04:00, Fri., 21 Mar. 0.0356 0.0317 0.0338
02:01-03:00, Fri., 21 Mar. 0.0357 0.0311 0.0337
01:01-02:00, Fri., 21 Mar. 0.0361 0.0317 0.0339
00:01-01:00, Fri., 21 Mar. 0.0363 0.0318 0.0340
23:01-24:00, Thu., 20 Mar. 0.0355 0.0315 0.0335
22:01-23:00, Thu., 20 Mar. 0.0372 0.0308 0.0337
21:01-22:00, Thu., 20 Mar. 0.0355 0.0304 0.0332
20:01-21:00, Thu., 20 Mar. 0.0345 0.0303 0.0324
19:01-20:00, Thu., 20 Mar. 0.0348 0.0304 0.0326
18:01-19:00, Thu., 20 Mar. 0.0353 0.0300 0.0324
17:01-18:00, Thu., 20 Mar. 0.0350 0.0303 0.0326
16:01-17:00, Thu., 20 Mar. 0.0354 0.0314 0.0329
15:01-16:00, Thu., 20 Mar. 0.0344 0.0313 0.0328
14:01-15:00, Thu., 20 Mar. 0.0350 0.0302 0.0329
13:01-14:00, Thu., 20 Mar. 0.0363 0.0305 0.0331
12:01-13:00, Thu., 20 Mar. 0.0353 0.0298 0.0327
11:01-12:00, Thu., 20 Mar. 0.0353 0.0307 0.0329
10:01-11:00, Thu., 20 Mar. 0.0353 0.0303 0.0326
09:01-10:00, Thu., 20 Mar. 0.0346 0.0303 0.0327
08:01-09:00, Thu., 20 Mar. 0.0355 0.0308 0.0331
07:01-08:00, Thu., 20 Mar. 0.0370 0.0318 0.0340
06:01-07:00, Thu., 20 Mar. 0.0363 0.0315 0.0333
05:01-06:00, Thu., 20 Mar. 0.0352 0.0304 0.0330
04:01-05:00, Thu., 20 Mar. 0.0353 0.0304 0.0328
03:01-04:00, Thu., 20 Mar. 0.0355 0.0298 0.0330
02:01-03:00, Thu., 20 Mar. 0.0348 0.0305 0.0329
01:01-02:00, Thu., 20 Mar. 0.0352 0.0308 0.0327
00:01-01:00, Thu., 20 Mar. 0.0349 0.0303 0.0326
23:01-24:00, Wed., 19 Mar. 0.0353 0.0306 0.0328