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.

【News about this monitoring post】

We will suspend the provision of data in part or whole of the following time slots by interruption of power supply and relevant facilities due to maintenance and inspection of equipment.

From 9:00 to 13:00 on Tuesday, June 26,2018 Hachioji
From 13:00 to 17:00 on Thursday, June 26,2018 Adachi
From 9:00 to 13:00 on Wednesday, June 27,2018 Chofu
From 13:00 to 17:00 on Wednesday, June 27,2018 Ota
From 9:00 to 13:00 on Thursday, June 28,2018 Kodaira 
From 13:00 to 17:00 on Thursday, June 28,2018 Edogawa
From 9:00 to 13:00 on Friday, June 29,2018 Shinjuku







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
21:01-22:00, Thu., 20 Sep. 0.0620 0.0547 0.0579
20:01-21:00, Thu., 20 Sep. 0.0624 0.0549 0.0582
19:01-20:00, Thu., 20 Sep. 0.0582 0.0507 0.0541
18:01-19:00, Thu., 20 Sep. 0.0581 0.0510 0.0544
17:01-18:00, Thu., 20 Sep. 0.0654 0.0553 0.0609
16:01-17:00, Thu., 20 Sep. 0.0692 0.0585 0.0633
15:01-16:00, Thu., 20 Sep. 0.0653 0.0589 0.0620
14:01-15:00, Thu., 20 Sep. 0.0630 0.0471 0.0532
13:01-14:00, Thu., 20 Sep. 0.0527 0.0438 0.0476
12:01-13:00, Thu., 20 Sep. 0.0518 0.0448 0.0476
11:01-12:00, Thu., 20 Sep. 0.0517 0.0447 0.0478
10:01-11:00, Thu., 20 Sep. 0.0507 0.0445 0.0474
09:01-10:00, Thu., 20 Sep. 0.0520 0.0447 0.0479
08:01-09:00, Thu., 20 Sep. 0.0513 0.0447 0.0477
07:01-08:00, Thu., 20 Sep. 0.0511 0.0438 0.0477
06:01-07:00, Thu., 20 Sep. 0.0506 0.0446 0.0478
05:01-06:00, Thu., 20 Sep. 0.0505 0.0447 0.0478
04:01-05:00, Thu., 20 Sep. 0.0505 0.0427 0.0472
03:01-04:00, Thu., 20 Sep. 0.0504 0.0447 0.0477
02:01-03:00, Thu., 20 Sep. 0.0510 0.0444 0.0477
01:01-02:00, Thu., 20 Sep. 0.0505 0.0440 0.0475
00:01-01:00, Thu., 20 Sep. 0.0520 0.0444 0.0476
23:01-24:00, Wed., 19 Sep. 0.0508 0.0447 0.0474
22:01-23:00, Wed., 19 Sep. 0.0511 0.0437 0.0473
21:01-22:00, Wed., 19 Sep. 0.0513 0.0440 0.0471
20:01-21:00, Wed., 19 Sep. 0.0505 0.0447 0.0473
19:01-20:00, Wed., 19 Sep. 0.0500 0.0444 0.0474
18:01-19:00, Wed., 19 Sep. 0.0505 0.0439 0.0476
17:01-18:00, Wed., 19 Sep. 0.0503 0.0449 0.0473
16:01-17:00, Wed., 19 Sep. 0.0497 0.0442 0.0473
15:01-16:00, Wed., 19 Sep. 0.0509 0.0446 0.0475
14:01-15:00, Wed., 19 Sep. 0.0501 0.0434 0.0472
13:01-14:00, Wed., 19 Sep. 0.0501 0.0446 0.0472
12:01-13:00, Wed., 19 Sep. 0.0504 0.0442 0.0475
11:01-12:00, Wed., 19 Sep. 0.0497 0.0442 0.0473
10:01-11:00, Wed., 19 Sep. 0.0495 0.0434 0.0471
09:01-10:00, Wed., 19 Sep. 0.0517 0.0434 0.0470
08:01-09:00, Wed., 19 Sep. 0.0504 0.0439 0.0472
07:01-08:00, Wed., 19 Sep. 0.0509 0.0441 0.0469
06:01-07:00, Wed., 19 Sep. 0.0499 0.0440 0.0468
05:01-06:00, Wed., 19 Sep. 0.0496 0.0436 0.0466
04:01-05:00, Wed., 19 Sep. 0.0491 0.0439 0.0468
03:01-04:00, Wed., 19 Sep. 0.0510 0.0450 0.0474
02:01-03:00, Wed., 19 Sep. 0.0515 0.0450 0.0485
01:01-02:00, Wed., 19 Sep. 0.0597 0.0487 0.0534
00:01-01:00, Wed., 19 Sep. 0.0654 0.0563 0.0606
23:01-24:00, Tue., 18 Sep. 0.0611 0.0455 0.0516
22:01-23:00, Tue., 18 Sep. 0.0519 0.0441 0.0480
21:01-22:00, Tue., 18 Sep. 0.0555 0.0483 0.0524
20:01-21:00, Tue., 18 Sep. 0.0648 0.0500 0.0582
19:01-20:00, Tue., 18 Sep. 0.0622 0.0494 0.0558
18:01-19:00, Tue., 18 Sep. 0.0543 0.0443 0.0482
17:01-18:00, Tue., 18 Sep. 0.0495 0.0447 0.0471
16:01-17:00, Tue., 18 Sep. 0.0496 0.0438 0.0468
15:01-16:00, Tue., 18 Sep. 0.0502 0.0431 0.0470
14:01-15:00, Tue., 18 Sep. 0.0503 0.0437 0.0466
13:01-14:00, Tue., 18 Sep. 0.0504 0.0442 0.0470
12:01-13:00, Tue., 18 Sep. 0.0497 0.0418 0.0467
11:01-12:00, Tue., 18 Sep. 0.0498 0.0427 0.0465
10:01-11:00, Tue., 18 Sep. 0.0502 0.0445 0.0469
09:01-10:00, Tue., 18 Sep. 0.0490 0.0437 0.0463
08:01-09:00, Tue., 18 Sep. 0.0495 0.0437 0.0464
07:01-08:00, Tue., 18 Sep. 0.0497 0.0438 0.0465
06:01-07:00, Tue., 18 Sep. 0.0501 0.0433 0.0465
05:01-06:00, Tue., 18 Sep. 0.0491 0.0434 0.0460
04:01-05:00, Tue., 18 Sep. 0.0503 0.0439 0.0463
03:01-04:00, Tue., 18 Sep. 0.0492 0.0427 0.0462
02:01-03:00, Tue., 18 Sep. 0.0499 0.0445 0.0469
01:01-02:00, Tue., 18 Sep. 0.0524 0.0436 0.0478
00:01-01:00, Tue., 18 Sep. 0.0508 0.0453 0.0478
23:01-24:00, Mon., 17 Sep. 0.0510 0.0437 0.0472
22:01-23:00, Mon., 17 Sep. 0.0539 0.0464 0.0501
21:01-22:00, Mon., 17 Sep. 0.0631 0.0505 0.0574
20:01-21:00, Mon., 17 Sep. 0.0690 0.0570 0.0630
19:01-20:00, Mon., 17 Sep. 0.0788 0.0621 0.0710
18:01-19:00, Mon., 17 Sep. 0.0834 0.0600 0.0749
17:01-18:00, Mon., 17 Sep. 0.0651 0.0566 0.0607
16:01-17:00, Mon., 17 Sep. 0.0664 0.0454 0.0519
15:01-16:00, Mon., 17 Sep. 0.0509 0.0450 0.0479
14:01-15:00, Mon., 17 Sep. 0.0508 0.0452 0.0476
13:01-14:00, Mon., 17 Sep. 0.0512 0.0449 0.0476
12:01-13:00, Mon., 17 Sep. 0.0507 0.0447 0.0476
11:01-12:00, Mon., 17 Sep. 0.0527 0.0453 0.0481
10:01-11:00, Mon., 17 Sep. 0.0513 0.0453 0.0483
09:01-10:00, Mon., 17 Sep. 0.0508 0.0447 0.0477
08:01-09:00, Mon., 17 Sep. 0.0508 0.0442 0.0478
07:01-08:00, Mon., 17 Sep. 0.0510 0.0450 0.0478
06:01-07:00, Mon., 17 Sep. 0.0512 0.0452 0.0478
05:01-06:00, Mon., 17 Sep. 0.0502 0.0436 0.0474
04:01-05:00, Mon., 17 Sep. 0.0509 0.0444 0.0475
03:01-04:00, Mon., 17 Sep. 0.0520 0.0445 0.0473
02:01-03:00, Mon., 17 Sep. 0.0509 0.0436 0.0473
01:01-02:00, Mon., 17 Sep. 0.0506 0.0446 0.0474
00:01-01:00, Mon., 17 Sep. 0.0513 0.0441 0.0470
23:01-24:00, Sun., 16 Sep. 0.0505 0.0445 0.0475
22:01-23:00, Sun., 16 Sep. 0.0507 0.0442 0.0472
21:01-22:00, Sun., 16 Sep. 0.0495 0.0455 0.0471
20:01-21:00, Sun., 16 Sep. 0.0495 0.0448 0.0470
19:01-20:00, Sun., 16 Sep. 0.0505 0.0443 0.0473
18:01-19:00, Sun., 16 Sep. 0.0501 0.0441 0.0473
17:01-18:00, Sun., 16 Sep. 0.0511 0.0440 0.0469
16:01-17:00, Sun., 16 Sep. 0.0507 0.0437 0.0468
15:01-16:00, Sun., 16 Sep. 0.0497 0.0436 0.0469
14:01-15:00, Sun., 16 Sep. 0.0497 0.0433 0.0465
13:01-14:00, Sun., 16 Sep. 0.0490 0.0433 0.0465
12:01-13:00, Sun., 16 Sep. 0.0504 0.0433 0.0469
11:01-12:00, Sun., 16 Sep. 0.0498 0.0443 0.0470
10:01-11:00, Sun., 16 Sep. 0.0496 0.0450 0.0467
09:01-10:00, Sun., 16 Sep. 0.0497 0.0433 0.0467
08:01-09:00, Sun., 16 Sep. 0.0505 0.0438 0.0468
07:01-08:00, Sun., 16 Sep. 0.0495 0.0429 0.0466
06:01-07:00, Sun., 16 Sep. 0.0493 0.0437 0.0465
05:01-06:00, Sun., 16 Sep. 0.0521 0.0436 0.0470
04:01-05:00, Sun., 16 Sep. 0.0498 0.0444 0.0471
03:01-04:00, Sun., 16 Sep. 0.0501 0.0429 0.0471
02:01-03:00, Sun., 16 Sep. 0.0495 0.0428 0.0467
01:01-02:00, Sun., 16 Sep. 0.0503 0.0432 0.0464
00:01-01:00, Sun., 16 Sep. 0.0489 0.0429 0.0463
23:01-24:00, Sat., 15 Sep. 0.0515 0.0429 0.0467
22:01-23:00, Sat., 15 Sep. 0.0500 0.0443 0.0466
21:01-22:00, Sat., 15 Sep. 0.0492 0.0441 0.0466
20:01-21:00, Sat., 15 Sep. 0.0493 0.0424 0.0463
19:01-20:00, Sat., 15 Sep. 0.0491 0.0432 0.0465
18:01-19:00, Sat., 15 Sep. 0.0495 0.0426 0.0464
17:01-18:00, Sat., 15 Sep. 0.0492 0.0436 0.0461
16:01-17:00, Sat., 15 Sep. 0.0509 0.0441 0.0466
15:01-16:00, Sat., 15 Sep. 0.0504 0.0440 0.0470
14:01-15:00, Sat., 15 Sep. 0.0510 0.0447 0.0479
13:01-14:00, Sat., 15 Sep. 0.0530 0.0465 0.0496
12:01-13:00, Sat., 15 Sep. 0.0563 0.0477 0.0523
11:01-12:00, Sat., 15 Sep. 0.0567 0.0491 0.0534
10:01-11:00, Sat., 15 Sep. 0.0555 0.0485 0.0512
09:01-10:00, Sat., 15 Sep. 0.0530 0.0449 0.0503
08:01-09:00, Sat., 15 Sep. 0.0549 0.0480 0.0512
07:01-08:00, Sat., 15 Sep. 0.0522 0.0450 0.0480
06:01-07:00, Sat., 15 Sep. 0.0503 0.0443 0.0468
05:01-06:00, Sat., 15 Sep. 0.0495 0.0436 0.0467
04:01-05:00, Sat., 15 Sep. 0.0502 0.0432 0.0467
03:01-04:00, Sat., 15 Sep. 0.0500 0.0438 0.0472
02:01-03:00, Sat., 15 Sep. 0.0515 0.0458 0.0485
01:01-02:00, Sat., 15 Sep. 0.0535 0.0451 0.0489
00:01-01:00, Sat., 15 Sep. 0.0518 0.0444 0.0487
23:01-24:00, Fri., 14 Sep. 0.0549 0.0450 0.0488
22:01-23:00, Fri., 14 Sep. 0.0510 0.0457 0.0485
21:01-22:00, Fri., 14 Sep. 0.0501 0.0443 0.0472
20:01-21:00, Fri., 14 Sep. 0.0504 0.0439 0.0468
19:01-20:00, Fri., 14 Sep. 0.0499 0.0433 0.0471
18:01-19:00, Fri., 14 Sep. 0.0508 0.0435 0.0465
17:01-18:00, Fri., 14 Sep. 0.0504 0.0438 0.0469
16:01-17:00, Fri., 14 Sep. 0.0504 0.0436 0.0472
15:01-16:00, Fri., 14 Sep. 0.0502 0.0423 0.0467
14:01-15:00, Fri., 14 Sep. 0.0493 0.0442 0.0469
13:01-14:00, Fri., 14 Sep. 0.0496 0.0443 0.0466
12:01-13:00, Fri., 14 Sep. 0.0499 0.0438 0.0467
11:01-12:00, Fri., 14 Sep. 0.0507 0.0437 0.0472
10:01-11:00, Fri., 14 Sep. 0.0506 0.0452 0.0484
09:01-10:00, Fri., 14 Sep. 0.0530 0.0464 0.0492
08:01-09:00, Fri., 14 Sep. 0.0544 0.0469 0.0511
07:01-08:00, Fri., 14 Sep. 0.0556 0.0469 0.0508
06:01-07:00, Fri., 14 Sep. 0.0551 0.0467 0.0504
05:01-06:00, Fri., 14 Sep. 0.0511 0.0460 0.0488
04:01-05:00, Fri., 14 Sep. 0.0518 0.0461 0.0489
03:01-04:00, Fri., 14 Sep. 0.0523 0.0453 0.0490
02:01-03:00, Fri., 14 Sep. 0.0532 0.0461 0.0493
01:01-02:00, Fri., 14 Sep. 0.0529 0.0451 0.0501
00:01-01:00, Fri., 14 Sep. 0.0528 0.0462 0.0498
23:01-24:00, Thu., 13 Sep. 0.0514 0.0458 0.0486
22:01-23:00, Thu., 13 Sep. 0.0523 0.0462 0.0488
21:01-22:00, Thu., 13 Sep. 0.0540 0.0461 0.0501
20:01-21:00, Thu., 13 Sep. 0.0540 0.0477 0.0501
19:01-20:00, Thu., 13 Sep. 0.0504 0.0434 0.0477
18:01-19:00, Thu., 13 Sep. 0.0501 0.0446 0.0478
17:01-18:00, Thu., 13 Sep. 0.0511 0.0432 0.0476
16:01-17:00, Thu., 13 Sep. 0.0515 0.0459 0.0482
15:01-16:00, Thu., 13 Sep. 0.0523 0.0443 0.0479
14:01-15:00, Thu., 13 Sep. 0.0520 0.0460 0.0481
13:01-14:00, Thu., 13 Sep. 0.0514 0.0443 0.0477
12:01-13:00, Thu., 13 Sep. 0.0516 0.0441 0.0479
11:01-12:00, Thu., 13 Sep. 0.0515 0.0453 0.0482
10:01-11:00, Thu., 13 Sep. 0.0513 0.0444 0.0482
09:01-10:00, Thu., 13 Sep. 0.0523 0.0445 0.0479
08:01-09:00, Thu., 13 Sep. 0.0523 0.0452 0.0480
07:01-08:00, Thu., 13 Sep. 0.0507 0.0451 0.0480
06:01-07:00, Thu., 13 Sep. 0.0510 0.0453 0.0479
05:01-06:00, Thu., 13 Sep. 0.0509 0.0447 0.0477
04:01-05:00, Thu., 13 Sep. 0.0500 0.0453 0.0476
03:01-04:00, Thu., 13 Sep. 0.0503 0.0447 0.0480
02:01-03:00, Thu., 13 Sep. 0.0508 0.0448 0.0480
01:01-02:00, Thu., 13 Sep. 0.0502 0.0454 0.0477
00:01-01:00, Thu., 13 Sep. 0.0510 0.0450 0.0479
23:01-24:00, Wed., 12 Sep. 0.0516 0.0455 0.0483
22:01-23:00, Wed., 12 Sep. 0.0502 0.0451 0.0482
21:01-22:00, Wed., 12 Sep. 0.0513 0.0458 0.0485
20:01-21:00, Wed., 12 Sep. 0.0508 0.0450 0.0479
19:01-20:00, Wed., 12 Sep. 0.0504 0.0435 0.0472
18:01-19:00, Wed., 12 Sep. 0.0502 0.0452 0.0473
17:01-18:00, Wed., 12 Sep. 0.0511 0.0442 0.0475
16:01-17:00, Wed., 12 Sep. 0.0503 0.0447 0.0476
15:01-16:00, Wed., 12 Sep. 0.0523 0.0452 0.0477
14:01-15:00, Wed., 12 Sep. 0.0518 0.0440 0.0473
13:01-14:00, Wed., 12 Sep. 0.0497 0.0434 0.0472
12:01-13:00, Wed., 12 Sep. 0.0512 0.0439 0.0472
11:01-12:00, Wed., 12 Sep. 0.0509 0.0446 0.0474
10:01-11:00, Wed., 12 Sep. 0.0515 0.0443 0.0472
09:01-10:00, Wed., 12 Sep. 0.0504 0.0447 0.0473
08:01-09:00, Wed., 12 Sep. 0.0509 0.0429 0.0475
07:01-08:00, Wed., 12 Sep. 0.0501 0.0443 0.0472
06:01-07:00, Wed., 12 Sep. 0.0523 0.0438 0.0474
05:01-06:00, Wed., 12 Sep. 0.0502 0.0448 0.0474
04:01-05:00, Wed., 12 Sep. 0.0503 0.0431 0.0470
03:01-04:00, Wed., 12 Sep. 0.0517 0.0430 0.0473
02:01-03:00, Wed., 12 Sep. 0.0511 0.0439 0.0472
01:01-02:00, Wed., 12 Sep. 0.0505 0.0444 0.0471
00:01-01:00, Wed., 12 Sep. 0.0500 0.0415 0.0472
23:01-24:00, Tue., 11 Sep. 0.0508 0.0438 0.0472
22:01-23:00, Tue., 11 Sep. 0.0505 0.0433 0.0472
21:01-22:00, Tue., 11 Sep. 0.0498 0.0439 0.0469
20:01-21:00, Tue., 11 Sep. 0.0498 0.0439 0.0467
19:01-20:00, Tue., 11 Sep. 0.0503 0.0439 0.0470
18:01-19:00, Tue., 11 Sep. 0.0515 0.0444 0.0470
17:01-18:00, Tue., 11 Sep. 0.0501 0.0444 0.0471
16:01-17:00, Tue., 11 Sep. 0.0494 0.0439 0.0470
15:01-16:00, Tue., 11 Sep. 0.0506 0.0438 0.0469
14:01-15:00, Tue., 11 Sep. 0.0504 0.0442 0.0470
13:01-14:00, Tue., 11 Sep. 0.0500 0.0431 0.0470
12:01-13:00, Tue., 11 Sep. 0.0501 0.0445 0.0472
11:01-12:00, Tue., 11 Sep. 0.0506 0.0441 0.0475
10:01-11:00, Tue., 11 Sep. 0.0513 0.0432 0.0468
09:01-10:00, Tue., 11 Sep. 0.0497 0.0438 0.0469
08:01-09:00, Tue., 11 Sep. 0.0497 0.0443 0.0467
07:01-08:00, Tue., 11 Sep. 0.0506 0.0449 0.0469
06:01-07:00, Tue., 11 Sep. 0.0490 0.0443 0.0466
05:01-06:00, Tue., 11 Sep. 0.0501 0.0440 0.0467
04:01-05:00, Tue., 11 Sep. 0.0499 0.0443 0.0468
03:01-04:00, Tue., 11 Sep. 0.0502 0.0456 0.0479
02:01-03:00, Tue., 11 Sep. 0.0538 0.0476 0.0502
01:01-02:00, Tue., 11 Sep. 0.0547 0.0451 0.0496
00:01-01:00, Tue., 11 Sep. 0.0520 0.0459 0.0490
23:01-24:00, Mon., 10 Sep. 0.0524 0.0469 0.0496
22:01-23:00, Mon., 10 Sep. 0.0546 0.0451 0.0502