Radiation doses in the air / Measurement results by the hour (Edogawa)

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., 22 Dec. 0.0426 0.0378 0.0399
10:01-11:00, Sun., 22 Dec. 0.0423 0.0370 0.0399
09:01-10:00, Sun., 22 Dec. 0.0427 0.0377 0.0401
08:01-09:00, Sun., 22 Dec. 0.0416 0.0382 0.0400
07:01-08:00, Sun., 22 Dec. 0.0425 0.0374 0.0401
06:01-07:00, Sun., 22 Dec. 0.0423 0.0366 0.0400
05:01-06:00, Sun., 22 Dec. 0.0424 0.0383 0.0402
04:01-05:00, Sun., 22 Dec. 0.0425 0.0379 0.0402
03:01-04:00, Sun., 22 Dec. 0.0434 0.0377 0.0401
02:01-03:00, Sun., 22 Dec. 0.0425 0.0376 0.0399
01:01-02:00, Sun., 22 Dec. 0.0426 0.0369 0.0400
00:01-01:00, Sun., 22 Dec. 0.0419 0.0372 0.0397
23:01-24:00, Sat., 21 Dec. 0.0417 0.0374 0.0395
22:01-23:00, Sat., 21 Dec. 0.0416 0.0370 0.0394
21:01-22:00, Sat., 21 Dec. 0.0418 0.0373 0.0395
20:01-21:00, Sat., 21 Dec. 0.0417 0.0373 0.0394
19:01-20:00, Sat., 21 Dec. 0.0411 0.0370 0.0392
18:01-19:00, Sat., 21 Dec. 0.0414 0.0369 0.0389
17:01-18:00, Sat., 21 Dec. 0.0419 0.0370 0.0393
16:01-17:00, Sat., 21 Dec. 0.0417 0.0365 0.0385
15:01-16:00, Sat., 21 Dec. 0.0409 0.0361 0.0386
14:01-15:00, Sat., 21 Dec. 0.0409 0.0362 0.0388
13:01-14:00, Sat., 21 Dec. 0.0411 0.0370 0.0392
12:01-13:00, Sat., 21 Dec. 0.0424 0.0371 0.0392
11:01-12:00, Sat., 21 Dec. 0.0421 0.0370 0.0396
10:01-11:00, Sat., 21 Dec. 0.0427 0.0385 0.0407
09:01-10:00, Sat., 21 Dec. 0.0439 0.0384 0.0412
08:01-09:00, Sat., 21 Dec. 0.0429 0.0386 0.0407
07:01-08:00, Sat., 21 Dec. 0.0433 0.0384 0.0408
06:01-07:00, Sat., 21 Dec. 0.0427 0.0381 0.0406
05:01-06:00, Sat., 21 Dec. 0.0423 0.0382 0.0401
04:01-05:00, Sat., 21 Dec. 0.0431 0.0382 0.0405
03:01-04:00, Sat., 21 Dec. 0.0424 0.0381 0.0399
02:01-03:00, Sat., 21 Dec. 0.0419 0.0375 0.0401
01:01-02:00, Sat., 21 Dec. 0.0421 0.0367 0.0398
00:01-01:00, Sat., 21 Dec. 0.0421 0.0374 0.0398
23:01-24:00, Fri., 20 Dec. 0.0425 0.0379 0.0397
22:01-23:00, Fri., 20 Dec. 0.0412 0.0373 0.0392
21:01-22:00, Fri., 20 Dec. 0.0414 0.0367 0.0391
20:01-21:00, Fri., 20 Dec. 0.0412 0.0363 0.0388
19:01-20:00, Fri., 20 Dec. 0.0406 0.0362 0.0387
18:01-19:00, Fri., 20 Dec. 0.0419 0.0367 0.0389
17:01-18:00, Fri., 20 Dec. 0.0407 0.0366 0.0388
16:01-17:00, Fri., 20 Dec. 0.0409 0.0367 0.0389
15:01-16:00, Fri., 20 Dec. 0.0405 0.0352 0.0384
14:01-15:00, Fri., 20 Dec. 0.0408 0.0360 0.0386
13:01-14:00, Fri., 20 Dec. 0.0408 0.0353 0.0384
12:01-13:00, Fri., 20 Dec. 0.0412 0.0353 0.0389
11:01-12:00, Fri., 20 Dec. 0.0418 0.0363 0.0389
10:01-11:00, Fri., 20 Dec. 0.0408 0.0363 0.0386
09:01-10:00, Fri., 20 Dec. 0.0409 0.0358 0.0383
08:01-09:00, Fri., 20 Dec. 0.0425 0.0374 0.0397
07:01-08:00, Fri., 20 Dec. 0.0418 0.0364 0.0395
06:01-07:00, Fri., 20 Dec. 0.0419 0.0374 0.0395
05:01-06:00, Fri., 20 Dec. 0.0414 0.0370 0.0395
04:01-05:00, Fri., 20 Dec. 0.0419 0.0364 0.0393
03:01-04:00, Fri., 20 Dec. 0.0415 0.0363 0.0393
02:01-03:00, Fri., 20 Dec. 0.0419 0.0367 0.0391
01:01-02:00, Fri., 20 Dec. 0.0407 0.0360 0.0389
00:01-01:00, Fri., 20 Dec. 0.0419 0.0361 0.0392
23:01-24:00, Thu., 19 Dec. 0.0420 0.0370 0.0391
22:01-23:00, Thu., 19 Dec. 0.0411 0.0363 0.0387
21:01-22:00, Thu., 19 Dec. 0.0416 0.0370 0.0388
20:01-21:00, Thu., 19 Dec. 0.0423 0.0360 0.0388
19:01-20:00, Thu., 19 Dec. 0.0412 0.0371 0.0390
18:01-19:00, Thu., 19 Dec. 0.0415 0.0365 0.0392
17:01-18:00, Thu., 19 Dec. 0.0417 0.0361 0.0394
16:01-17:00, Thu., 19 Dec. 0.0412 0.0377 0.0394
15:01-16:00, Thu., 19 Dec. 0.0419 0.0363 0.0395
14:01-15:00, Thu., 19 Dec. 0.0424 0.0367 0.0395
13:01-14:00, Thu., 19 Dec. 0.0421 0.0371 0.0394
12:01-13:00, Thu., 19 Dec. 0.0422 0.0376 0.0396
11:01-12:00, Thu., 19 Dec. 0.0437 0.0382 0.0411
10:01-11:00, Thu., 19 Dec. 0.0457 0.0402 0.0429
09:01-10:00, Thu., 19 Dec. 0.0496 0.0414 0.0453
08:01-09:00, Thu., 19 Dec. 0.0531 0.0450 0.0496
07:01-08:00, Thu., 19 Dec. 0.0457 0.0385 0.0411
06:01-07:00, Thu., 19 Dec. 0.0440 0.0377 0.0407
05:01-06:00, Thu., 19 Dec. 0.0443 0.0391 0.0421
04:01-05:00, Thu., 19 Dec. 0.0450 0.0391 0.0417
03:01-04:00, Thu., 19 Dec. 0.0446 0.0395 0.0420
02:01-03:00, Thu., 19 Dec. 0.0439 0.0389 0.0413
01:01-02:00, Thu., 19 Dec. 0.0426 0.0381 0.0400
00:01-01:00, Thu., 19 Dec. 0.0416 0.0377 0.0398
23:01-24:00, Wed., 18 Dec. 0.0417 0.0380 0.0398
22:01-23:00, Wed., 18 Dec. 0.0418 0.0367 0.0397
21:01-22:00, Wed., 18 Dec. 0.0423 0.0374 0.0396
20:01-21:00, Wed., 18 Dec. 0.0423 0.0377 0.0396
19:01-20:00, Wed., 18 Dec. 0.0425 0.0374 0.0396
18:01-19:00, Wed., 18 Dec. 0.0409 0.0373 0.0393
17:01-18:00, Wed., 18 Dec. 0.0429 0.0375 0.0398
16:01-17:00, Wed., 18 Dec. 0.0423 0.0372 0.0397
15:01-16:00, Wed., 18 Dec. 0.0419 0.0367 0.0396
14:01-15:00, Wed., 18 Dec. 0.0419 0.0377 0.0397
13:01-14:00, Wed., 18 Dec. 0.0428 0.0370 0.0396
12:01-13:00, Wed., 18 Dec. 0.0421 0.0366 0.0392
11:01-12:00, Wed., 18 Dec. 0.0434 0.0377 0.0399
10:01-11:00, Wed., 18 Dec. 0.0424 0.0373 0.0394
09:01-10:00, Wed., 18 Dec. 0.0425 0.0367 0.0395
08:01-09:00, Wed., 18 Dec. 0.0436 0.0377 0.0404
07:01-08:00, Wed., 18 Dec. 0.0439 0.0383 0.0410
06:01-07:00, Wed., 18 Dec. 0.0433 0.0387 0.0410
05:01-06:00, Wed., 18 Dec. 0.0430 0.0388 0.0411
04:01-05:00, Wed., 18 Dec. 0.0426 0.0390 0.0407
03:01-04:00, Wed., 18 Dec. 0.0429 0.0388 0.0406
02:01-03:00, Wed., 18 Dec. 0.0429 0.0384 0.0405
01:01-02:00, Wed., 18 Dec. 0.0431 0.0382 0.0405
00:01-01:00, Wed., 18 Dec. 0.0428 0.0384 0.0403
23:01-24:00, Tue., 17 Dec. 0.0422 0.0383 0.0401
22:01-23:00, Tue., 17 Dec. 0.0419 0.0363 0.0395
21:01-22:00, Tue., 17 Dec. 0.0427 0.0370 0.0394
20:01-21:00, Tue., 17 Dec. 0.0423 0.0367 0.0392
19:01-20:00, Tue., 17 Dec. 0.0409 0.0372 0.0391
18:01-19:00, Tue., 17 Dec. 0.0415 0.0363 0.0393
17:01-18:00, Tue., 17 Dec. 0.0416 0.0365 0.0392
16:01-17:00, Tue., 17 Dec. 0.0412 0.0370 0.0391
15:01-16:00, Tue., 17 Dec. 0.0413 0.0368 0.0392
14:01-15:00, Tue., 17 Dec. 0.0418 0.0374 0.0390
13:01-14:00, Tue., 17 Dec. 0.0427 0.0377 0.0399
12:01-13:00, Tue., 17 Dec. 0.0423 0.0380 0.0400
11:01-12:00, Tue., 17 Dec. 0.0426 0.0384 0.0401
10:01-11:00, Tue., 17 Dec. 0.0428 0.0386 0.0407
09:01-10:00, Tue., 17 Dec. 0.0433 0.0384 0.0406
08:01-09:00, Tue., 17 Dec. 0.0443 0.0385 0.0412
07:01-08:00, Tue., 17 Dec. 0.0437 0.0383 0.0409
06:01-07:00, Tue., 17 Dec. 0.0447 0.0388 0.0412
05:01-06:00, Tue., 17 Dec. 0.0445 0.0392 0.0413
04:01-05:00, Tue., 17 Dec. 0.0438 0.0391 0.0413
03:01-04:00, Tue., 17 Dec. 0.0430 0.0374 0.0407
02:01-03:00, Tue., 17 Dec. 0.0434 0.0378 0.0405
01:01-02:00, Tue., 17 Dec. 0.0432 0.0386 0.0404
00:01-01:00, Tue., 17 Dec. 0.0419 0.0383 0.0402
23:01-24:00, Mon., 16 Dec. 0.0433 0.0376 0.0399
22:01-23:00, Mon., 16 Dec. 0.0423 0.0381 0.0398
21:01-22:00, Mon., 16 Dec. 0.0423 0.0363 0.0397
20:01-21:00, Mon., 16 Dec. 0.0423 0.0373 0.0392
19:01-20:00, Mon., 16 Dec. 0.0424 0.0377 0.0396
18:01-19:00, Mon., 16 Dec. 0.0416 0.0355 0.0394
17:01-18:00, Mon., 16 Dec. 0.0424 0.0370 0.0396
16:01-17:00, Mon., 16 Dec. 0.0405 0.0366 0.0391
15:01-16:00, Mon., 16 Dec. 0.0411 0.0363 0.0389
14:01-15:00, Mon., 16 Dec. 0.0410 0.0367 0.0390
13:01-14:00, Mon., 16 Dec. 0.0422 0.0369 0.0396
12:01-13:00, Mon., 16 Dec. 0.0426 0.0371 0.0396
11:01-12:00, Mon., 16 Dec. 0.0417 0.0367 0.0397
10:01-11:00, Mon., 16 Dec. 0.0426 0.0383 0.0403
09:01-10:00, Mon., 16 Dec. 0.0429 0.0380 0.0400
08:01-09:00, Mon., 16 Dec. 0.0419 0.0376 0.0402
07:01-08:00, Mon., 16 Dec. 0.0423 0.0384 0.0402
06:01-07:00, Mon., 16 Dec. 0.0422 0.0383 0.0401
05:01-06:00, Mon., 16 Dec. 0.0429 0.0381 0.0404
04:01-05:00, Mon., 16 Dec. 0.0422 0.0383 0.0403
03:01-04:00, Mon., 16 Dec. 0.0423 0.0381 0.0403
02:01-03:00, Mon., 16 Dec. 0.0433 0.0377 0.0402
01:01-02:00, Mon., 16 Dec. 0.0427 0.0369 0.0403
00:01-01:00, Mon., 16 Dec. 0.0425 0.0376 0.0396
23:01-24:00, Sun., 15 Dec. 0.0419 0.0374 0.0397
22:01-23:00, Sun., 15 Dec. 0.0426 0.0370 0.0394
21:01-22:00, Sun., 15 Dec. 0.0412 0.0371 0.0394
20:01-21:00, Sun., 15 Dec. 0.0427 0.0373 0.0394
19:01-20:00, Sun., 15 Dec. 0.0419 0.0377 0.0395
18:01-19:00, Sun., 15 Dec. 0.0422 0.0375 0.0394
17:01-18:00, Sun., 15 Dec. 0.0420 0.0371 0.0391
16:01-17:00, Sun., 15 Dec. 0.0412 0.0378 0.0392
15:01-16:00, Sun., 15 Dec. 0.0408 0.0360 0.0388
14:01-15:00, Sun., 15 Dec. 0.0409 0.0368 0.0388
13:01-14:00, Sun., 15 Dec. 0.0416 0.0369 0.0390
12:01-13:00, Sun., 15 Dec. 0.0419 0.0370 0.0392
11:01-12:00, Sun., 15 Dec. 0.0419 0.0373 0.0395
10:01-11:00, Sun., 15 Dec. 0.0426 0.0379 0.0396
09:01-10:00, Sun., 15 Dec. 0.0415 0.0377 0.0397
08:01-09:00, Sun., 15 Dec. 0.0422 0.0381 0.0399
07:01-08:00, Sun., 15 Dec. 0.0419 0.0377 0.0399
06:01-07:00, Sun., 15 Dec. 0.0416 0.0374 0.0395
05:01-06:00, Sun., 15 Dec. 0.0421 0.0372 0.0395
04:01-05:00, Sun., 15 Dec. 0.0419 0.0374 0.0396
03:01-04:00, Sun., 15 Dec. 0.0417 0.0374 0.0394
02:01-03:00, Sun., 15 Dec. 0.0421 0.0374 0.0395
01:01-02:00, Sun., 15 Dec. 0.0419 0.0365 0.0393
00:01-01:00, Sun., 15 Dec. 0.0420 0.0374 0.0396
23:01-24:00, Sat., 14 Dec. 0.0420 0.0374 0.0392
22:01-23:00, Sat., 14 Dec. 0.0413 0.0367 0.0391
21:01-22:00, Sat., 14 Dec. 0.0412 0.0374 0.0391
20:01-21:00, Sat., 14 Dec. 0.0428 0.0367 0.0393
19:01-20:00, Sat., 14 Dec. 0.0408 0.0373 0.0390
18:01-19:00, Sat., 14 Dec. 0.0411 0.0367 0.0392
17:01-18:00, Sat., 14 Dec. 0.0426 0.0366 0.0393
16:01-17:00, Sat., 14 Dec. 0.0409 0.0376 0.0392
15:01-16:00, Sat., 14 Dec. 0.0413 0.0367 0.0391
14:01-15:00, Sat., 14 Dec. 0.0419 0.0367 0.0389
13:01-14:00, Sat., 14 Dec. 0.0417 0.0367 0.0390
12:01-13:00, Sat., 14 Dec. 0.0423 0.0366 0.0392
11:01-12:00, Sat., 14 Dec. 0.0415 0.0374 0.0393
10:01-11:00, Sat., 14 Dec. 0.0417 0.0374 0.0394
09:01-10:00, Sat., 14 Dec. 0.0420 0.0374 0.0398
08:01-09:00, Sat., 14 Dec. 0.0418 0.0375 0.0397
07:01-08:00, Sat., 14 Dec. 0.0426 0.0375 0.0403
06:01-07:00, Sat., 14 Dec. 0.0433 0.0384 0.0409
05:01-06:00, Sat., 14 Dec. 0.0435 0.0382 0.0413
04:01-05:00, Sat., 14 Dec. 0.0435 0.0391 0.0413
03:01-04:00, Sat., 14 Dec. 0.0432 0.0379 0.0408
02:01-03:00, Sat., 14 Dec. 0.0440 0.0388 0.0412
01:01-02:00, Sat., 14 Dec. 0.0446 0.0398 0.0423
00:01-01:00, Sat., 14 Dec. 0.0472 0.0401 0.0431
23:01-24:00, Fri., 13 Dec. 0.0431 0.0387 0.0405
22:01-23:00, Fri., 13 Dec. 0.0425 0.0383 0.0403
21:01-22:00, Fri., 13 Dec. 0.0425 0.0381 0.0400
20:01-21:00, Fri., 13 Dec. 0.0424 0.0376 0.0402
19:01-20:00, Fri., 13 Dec. 0.0419 0.0380 0.0403
18:01-19:00, Fri., 13 Dec. 0.0420 0.0377 0.0399
17:01-18:00, Fri., 13 Dec. 0.0417 0.0374 0.0399
16:01-17:00, Fri., 13 Dec. 0.0419 0.0371 0.0397
15:01-16:00, Fri., 13 Dec. 0.0422 0.0374 0.0398
14:01-15:00, Fri., 13 Dec. 0.0423 0.0374 0.0398
13:01-14:00, Fri., 13 Dec. 0.0429 0.0383 0.0399
12:01-13:00, Fri., 13 Dec. 0.0421 0.0370 0.0397
11:01-12:00, Fri., 13 Dec. 0.0420 0.0373 0.0396
10:01-11:00, Fri., 13 Dec. 0.0419 0.0367 0.0396
09:01-10:00, Fri., 13 Dec. 0.0413 0.0373 0.0394
08:01-09:00, Fri., 13 Dec. 0.0420 0.0379 0.0397
07:01-08:00, Fri., 13 Dec. 0.0430 0.0373 0.0398
06:01-07:00, Fri., 13 Dec. 0.0423 0.0377 0.0398
05:01-06:00, Fri., 13 Dec. 0.0426 0.0365 0.0396
04:01-05:00, Fri., 13 Dec. 0.0418 0.0374 0.0393
03:01-04:00, Fri., 13 Dec. 0.0418 0.0370 0.0395
02:01-03:00, Fri., 13 Dec. 0.0412 0.0369 0.0393
01:01-02:00, Fri., 13 Dec. 0.0412 0.0366 0.0390
00:01-01:00, Fri., 13 Dec. 0.0419 0.0366 0.0391
23:01-24:00, Thu., 12 Dec. 0.0412 0.0369 0.0389
22:01-23:00, Thu., 12 Dec. 0.0418 0.0370 0.0389
21:01-22:00, Thu., 12 Dec. 0.0419 0.0363 0.0392
20:01-21:00, Thu., 12 Dec. 0.0414 0.0371 0.0392
19:01-20:00, Thu., 12 Dec. 0.0411 0.0371 0.0392
18:01-19:00, Thu., 12 Dec. 0.0425 0.0370 0.0390
17:01-18:00, Thu., 12 Dec. 0.0419 0.0366 0.0391
16:01-17:00, Thu., 12 Dec. 0.0418 0.0369 0.0390
15:01-16:00, Thu., 12 Dec. 0.0413 0.0363 0.0391
14:01-15:00, Thu., 12 Dec. 0.0419 0.0370 0.0394
13:01-14:00, Thu., 12 Dec. 0.0412 0.0363 0.0391
12:01-13:00, Thu., 12 Dec. 0.0421 0.0372 0.0392