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
19:01-20:00, Sun., 24 Jun. 0.0522 0.0463 0.0490
18:01-19:00, Sun., 24 Jun. 0.0514 0.0454 0.0488
17:01-18:00, Sun., 24 Jun. 0.0517 0.0466 0.0489
16:01-17:00, Sun., 24 Jun. 0.0516 0.0455 0.0489
15:01-16:00, Sun., 24 Jun. 0.0531 0.0453 0.0489
14:01-15:00, Sun., 24 Jun. 0.0533 0.0460 0.0486
13:01-14:00, Sun., 24 Jun. 0.0523 0.0453 0.0488
12:01-13:00, Sun., 24 Jun. 0.0519 0.0462 0.0492
11:01-12:00, Sun., 24 Jun. 0.0562 0.0475 0.0525
10:01-11:00, Sun., 24 Jun. 0.0640 0.0524 0.0581
09:01-10:00, Sun., 24 Jun. 0.0613 0.0522 0.0558
08:01-09:00, Sun., 24 Jun. 0.0545 0.0480 0.0507
07:01-08:00, Sun., 24 Jun. 0.0573 0.0490 0.0526
06:01-07:00, Sun., 24 Jun. 0.0582 0.0494 0.0541
05:01-06:00, Sun., 24 Jun. 0.0540 0.0456 0.0489
04:01-05:00, Sun., 24 Jun. 0.0522 0.0451 0.0490
03:01-04:00, Sun., 24 Jun. 0.0519 0.0453 0.0483
02:01-03:00, Sun., 24 Jun. 0.0513 0.0457 0.0480
01:01-02:00, Sun., 24 Jun. 0.0522 0.0459 0.0483
00:01-01:00, Sun., 24 Jun. 0.0524 0.0454 0.0485
23:01-24:00, Sat., 23 Jun. 0.0502 0.0443 0.0478
22:01-23:00, Sat., 23 Jun. 0.0516 0.0452 0.0482
21:01-22:00, Sat., 23 Jun. 0.0511 0.0450 0.0483
20:01-21:00, Sat., 23 Jun. 0.0537 0.0463 0.0500
19:01-20:00, Sat., 23 Jun. 0.0577 0.0471 0.0526
18:01-19:00, Sat., 23 Jun. 0.0637 0.0530 0.0575
17:01-18:00, Sat., 23 Jun. 0.0636 0.0550 0.0588
16:01-17:00, Sat., 23 Jun. 0.0626 0.0551 0.0582
15:01-16:00, Sat., 23 Jun. 0.0592 0.0507 0.0549
14:01-15:00, Sat., 23 Jun. 0.0550 0.0477 0.0509
13:01-14:00, Sat., 23 Jun. 0.0537 0.0473 0.0506
12:01-13:00, Sat., 23 Jun. 0.0542 0.0481 0.0510
11:01-12:00, Sat., 23 Jun. 0.0554 0.0459 0.0498
10:01-11:00, Sat., 23 Jun. 0.0523 0.0465 0.0496
09:01-10:00, Sat., 23 Jun. 0.0524 0.0470 0.0496
08:01-09:00, Sat., 23 Jun. 0.0519 0.0450 0.0497
07:01-08:00, Sat., 23 Jun. 0.0539 0.0467 0.0499
06:01-07:00, Sat., 23 Jun. 0.0537 0.0469 0.0500
05:01-06:00, Sat., 23 Jun. 0.0529 0.0464 0.0499
04:01-05:00, Sat., 23 Jun. 0.0531 0.0464 0.0497
03:01-04:00, Sat., 23 Jun. 0.0524 0.0454 0.0495
02:01-03:00, Sat., 23 Jun. 0.0534 0.0458 0.0494
01:01-02:00, Sat., 23 Jun. 0.0526 0.0461 0.0494
00:01-01:00, Sat., 23 Jun. 0.0520 0.0462 0.0491
23:01-24:00, Fri., 22 Jun. 0.0528 0.0450 0.0495
22:01-23:00, Fri., 22 Jun. 0.0525 0.0459 0.0490
21:01-22:00, Fri., 22 Jun. 0.0531 0.0462 0.0492
20:01-21:00, Fri., 22 Jun. 0.0523 0.0463 0.0492
19:01-20:00, Fri., 22 Jun. 0.0531 0.0459 0.0493
18:01-19:00, Fri., 22 Jun. 0.0533 0.0461 0.0492
17:01-18:00, Fri., 22 Jun. 0.0521 0.0450 0.0490
16:01-17:00, Fri., 22 Jun. 0.0514 0.0455 0.0490
15:01-16:00, Fri., 22 Jun. 0.0527 0.0454 0.0490
14:01-15:00, Fri., 22 Jun. 0.0509 0.0461 0.0489
13:01-14:00, Fri., 22 Jun. 0.0531 0.0457 0.0490
12:01-13:00, Fri., 22 Jun. 0.0519 0.0461 0.0491
11:01-12:00, Fri., 22 Jun. 0.0521 0.0464 0.0489
10:01-11:00, Fri., 22 Jun. 0.0511 0.0445 0.0484
09:01-10:00, Fri., 22 Jun. 0.0521 0.0460 0.0488
08:01-09:00, Fri., 22 Jun. 0.0532 0.0449 0.0491
07:01-08:00, Fri., 22 Jun. 0.0533 0.0456 0.0491
06:01-07:00, Fri., 22 Jun. 0.0516 0.0456 0.0487
05:01-06:00, Fri., 22 Jun. 0.0522 0.0461 0.0482
04:01-05:00, Fri., 22 Jun. 0.0517 0.0457 0.0489
03:01-04:00, Fri., 22 Jun. 0.0524 0.0449 0.0486
02:01-03:00, Fri., 22 Jun. 0.0515 0.0450 0.0487
01:01-02:00, Fri., 22 Jun. 0.0523 0.0448 0.0486
00:01-01:00, Fri., 22 Jun. 0.0515 0.0460 0.0487
23:01-24:00, Thu., 21 Jun. 0.0520 0.0450 0.0488
22:01-23:00, Thu., 21 Jun. 0.0511 0.0450 0.0483
21:01-22:00, Thu., 21 Jun. 0.0519 0.0457 0.0488
20:01-21:00, Thu., 21 Jun. 0.0522 0.0459 0.0487
19:01-20:00, Thu., 21 Jun. 0.0524 0.0451 0.0485
18:01-19:00, Thu., 21 Jun. 0.0530 0.0461 0.0490
17:01-18:00, Thu., 21 Jun. 0.0523 0.0446 0.0486
16:01-17:00, Thu., 21 Jun. 0.0509 0.0446 0.0479
15:01-16:00, Thu., 21 Jun. 0.0508 0.0452 0.0480
14:01-15:00, Thu., 21 Jun. 0.0517 0.0445 0.0482
13:01-14:00, Thu., 21 Jun. 0.0504 0.0449 0.0481
12:01-13:00, Thu., 21 Jun. 0.0516 0.0450 0.0480
11:01-12:00, Thu., 21 Jun. 0.0501 0.0444 0.0478
10:01-11:00, Thu., 21 Jun. 0.0522 0.0453 0.0479
09:01-10:00, Thu., 21 Jun. 0.0509 0.0451 0.0479
08:01-09:00, Thu., 21 Jun. 0.0510 0.0449 0.0481
07:01-08:00, Thu., 21 Jun. 0.0516 0.0454 0.0485
06:01-07:00, Thu., 21 Jun. 0.0532 0.0457 0.0486
05:01-06:00, Thu., 21 Jun. 0.0568 0.0467 0.0517
04:01-05:00, Thu., 21 Jun. 0.0629 0.0543 0.0582
03:01-04:00, Thu., 21 Jun. 0.0590 0.0520 0.0559
02:01-03:00, Thu., 21 Jun. 0.0565 0.0459 0.0499
01:01-02:00, Thu., 21 Jun. 0.0519 0.0460 0.0486
00:01-01:00, Thu., 21 Jun. 0.0557 0.0471 0.0510
23:01-24:00, Wed., 20 Jun. 0.0611 0.0533 0.0572
22:01-23:00, Wed., 20 Jun. 0.0629 0.0525 0.0577
21:01-22:00, Wed., 20 Jun. 0.0597 0.0504 0.0557
20:01-21:00, Wed., 20 Jun. 0.0580 0.0462 0.0521
19:01-20:00, Wed., 20 Jun. 0.0521 0.0459 0.0489
18:01-19:00, Wed., 20 Jun. 0.0528 0.0460 0.0488
17:01-18:00, Wed., 20 Jun. 0.0529 0.0445 0.0488
16:01-17:00, Wed., 20 Jun. 0.0510 0.0453 0.0484
15:01-16:00, Wed., 20 Jun. 0.0509 0.0449 0.0480
14:01-15:00, Wed., 20 Jun. 0.0511 0.0453 0.0478
13:01-14:00, Wed., 20 Jun. 0.0520 0.0451 0.0496
12:01-13:00, Wed., 20 Jun. 0.0553 0.0478 0.0514
11:01-12:00, Wed., 20 Jun. 0.0562 0.0496 0.0526
10:01-11:00, Wed., 20 Jun. 0.0556 0.0488 0.0526
09:01-10:00, Wed., 20 Jun. 0.0551 0.0485 0.0520
08:01-09:00, Wed., 20 Jun. 0.0552 0.0487 0.0521
07:01-08:00, Wed., 20 Jun. 0.0575 0.0497 0.0529
06:01-07:00, Wed., 20 Jun. 0.0570 0.0489 0.0526
05:01-06:00, Wed., 20 Jun. 0.0572 0.0496 0.0535
04:01-05:00, Wed., 20 Jun. 0.0559 0.0475 0.0517
03:01-04:00, Wed., 20 Jun. 0.0530 0.0467 0.0498
02:01-03:00, Wed., 20 Jun. 0.0519 0.0461 0.0489
01:01-02:00, Wed., 20 Jun. 0.0515 0.0460 0.0490
00:01-01:00, Wed., 20 Jun. 0.0517 0.0460 0.0490
23:01-24:00, Tue., 19 Jun. 0.0529 0.0466 0.0489
22:01-23:00, Tue., 19 Jun. 0.0537 0.0464 0.0491
21:01-22:00, Tue., 19 Jun. 0.0517 0.0452 0.0490
20:01-21:00, Tue., 19 Jun. 0.0544 0.0446 0.0495
19:01-20:00, Tue., 19 Jun. 0.0525 0.0457 0.0491
18:01-19:00, Tue., 19 Jun. 0.0521 0.0462 0.0490
17:01-18:00, Tue., 19 Jun. 0.0521 0.0452 0.0486
16:01-17:00, Tue., 19 Jun. 0.0518 0.0460 0.0491
15:01-16:00, Tue., 19 Jun. 0.0522 0.0461 0.0489
14:01-15:00, Tue., 19 Jun. 0.0524 0.0451 0.0487
13:01-14:00, Tue., 19 Jun. 0.0514 0.0455 0.0489
12:01-13:00, Tue., 19 Jun. 0.0511 0.0448 0.0487
11:01-12:00, Tue., 19 Jun. 0.0521 0.0453 0.0486
10:01-11:00, Tue., 19 Jun. 0.0526 0.0459 0.0488
09:01-10:00, Tue., 19 Jun. 0.0522 0.0455 0.0487
08:01-09:00, Tue., 19 Jun. 0.0525 0.0450 0.0487
07:01-08:00, Tue., 19 Jun. 0.0526 0.0447 0.0490
06:01-07:00, Tue., 19 Jun. 0.0515 0.0456 0.0488
05:01-06:00, Tue., 19 Jun. 0.0532 0.0464 0.0494
04:01-05:00, Tue., 19 Jun. 0.0524 0.0460 0.0491
03:01-04:00, Tue., 19 Jun. 0.0529 0.0460 0.0490
02:01-03:00, Tue., 19 Jun. 0.0524 0.0456 0.0487
01:01-02:00, Tue., 19 Jun. 0.0526 0.0454 0.0486
00:01-01:00, Tue., 19 Jun. 0.0519 0.0448 0.0482
23:01-24:00, Mon., 18 Jun. 0.0521 0.0461 0.0488
22:01-23:00, Mon., 18 Jun. 0.0516 0.0458 0.0488
21:01-22:00, Mon., 18 Jun. 0.0526 0.0454 0.0494
20:01-21:00, Mon., 18 Jun. 0.0535 0.0459 0.0498
19:01-20:00, Mon., 18 Jun. 0.0574 0.0471 0.0506
18:01-19:00, Mon., 18 Jun. 0.0517 0.0467 0.0488
17:01-18:00, Mon., 18 Jun. 0.0510 0.0458 0.0486
16:01-17:00, Mon., 18 Jun. 0.0517 0.0459 0.0488
15:01-16:00, Mon., 18 Jun. 0.0530 0.0460 0.0489
14:01-15:00, Mon., 18 Jun. 0.0535 0.0461 0.0489
13:01-14:00, Mon., 18 Jun. 0.0525 0.0456 0.0496
12:01-13:00, Mon., 18 Jun. 0.0546 0.0460 0.0490
11:01-12:00, Mon., 18 Jun. 0.0534 0.0456 0.0493
10:01-11:00, Mon., 18 Jun. 0.0528 0.0450 0.0488
09:01-10:00, Mon., 18 Jun. 0.0517 0.0465 0.0490
08:01-09:00, Mon., 18 Jun. 0.0529 0.0451 0.0497
07:01-08:00, Mon., 18 Jun. 0.0532 0.0461 0.0492
06:01-07:00, Mon., 18 Jun. 0.0537 0.0449 0.0494
05:01-06:00, Mon., 18 Jun. 0.0536 0.0467 0.0491
04:01-05:00, Mon., 18 Jun. 0.0531 0.0456 0.0490
03:01-04:00, Mon., 18 Jun. 0.0507 0.0450 0.0487
02:01-03:00, Mon., 18 Jun. 0.0512 0.0455 0.0490
01:01-02:00, Mon., 18 Jun. 0.0513 0.0457 0.0487
00:01-01:00, Mon., 18 Jun. 0.0512 0.0464 0.0487
23:01-24:00, Sun., 17 Jun. 0.0510 0.0451 0.0485
22:01-23:00, Sun., 17 Jun. 0.0513 0.0456 0.0488
21:01-22:00, Sun., 17 Jun. 0.0529 0.0453 0.0487
20:01-21:00, Sun., 17 Jun. 0.0514 0.0454 0.0485
19:01-20:00, Sun., 17 Jun. 0.0521 0.0459 0.0487
18:01-19:00, Sun., 17 Jun. 0.0511 0.0458 0.0483
17:01-18:00, Sun., 17 Jun. 0.0513 0.0440 0.0484
16:01-17:00, Sun., 17 Jun. 0.0519 0.0450 0.0483
15:01-16:00, Sun., 17 Jun. 0.0510 0.0446 0.0485
14:01-15:00, Sun., 17 Jun. 0.0522 0.0451 0.0486
13:01-14:00, Sun., 17 Jun. 0.0532 0.0453 0.0484
12:01-13:00, Sun., 17 Jun. 0.0515 0.0456 0.0483
11:01-12:00, Sun., 17 Jun. 0.0507 0.0431 0.0481
10:01-11:00, Sun., 17 Jun. 0.0520 0.0452 0.0484
09:01-10:00, Sun., 17 Jun. 0.0527 0.0456 0.0483
08:01-09:00, Sun., 17 Jun. 0.0514 0.0438 0.0479
07:01-08:00, Sun., 17 Jun. 0.0516 0.0458 0.0482
06:01-07:00, Sun., 17 Jun. 0.0513 0.0454 0.0482
05:01-06:00, Sun., 17 Jun. 0.0525 0.0451 0.0482
04:01-05:00, Sun., 17 Jun. 0.0506 0.0454 0.0481
03:01-04:00, Sun., 17 Jun. 0.0506 0.0434 0.0481
02:01-03:00, Sun., 17 Jun. 0.0516 0.0446 0.0479
01:01-02:00, Sun., 17 Jun. 0.0532 0.0450 0.0481
00:01-01:00, Sun., 17 Jun. 0.0521 0.0437 0.0483
23:01-24:00, Sat., 16 Jun. 0.0511 0.0447 0.0479
22:01-23:00, Sat., 16 Jun. 0.0510 0.0443 0.0482
21:01-22:00, Sat., 16 Jun. 0.0514 0.0440 0.0481
20:01-21:00, Sat., 16 Jun. 0.0511 0.0446 0.0480
19:01-20:00, Sat., 16 Jun. 0.0511 0.0446 0.0482
18:01-19:00, Sat., 16 Jun. 0.0519 0.0453 0.0480
17:01-18:00, Sat., 16 Jun. 0.0510 0.0456 0.0480
16:01-17:00, Sat., 16 Jun. 0.0512 0.0447 0.0479
15:01-16:00, Sat., 16 Jun. 0.0504 0.0453 0.0479
14:01-15:00, Sat., 16 Jun. 0.0513 0.0454 0.0481
13:01-14:00, Sat., 16 Jun. 0.0508 0.0450 0.0483
12:01-13:00, Sat., 16 Jun. 0.0509 0.0441 0.0478
11:01-12:00, Sat., 16 Jun. 0.0508 0.0451 0.0477
10:01-11:00, Sat., 16 Jun. 0.0524 0.0448 0.0474
09:01-10:00, Sat., 16 Jun. 0.0520 0.0451 0.0481
08:01-09:00, Sat., 16 Jun. 0.0520 0.0454 0.0480
07:01-08:00, Sat., 16 Jun. 0.0514 0.0442 0.0478
06:01-07:00, Sat., 16 Jun. 0.0538 0.0468 0.0497
05:01-06:00, Sat., 16 Jun. 0.0551 0.0482 0.0516
04:01-05:00, Sat., 16 Jun. 0.0574 0.0496 0.0538
03:01-04:00, Sat., 16 Jun. 0.0537 0.0460 0.0504
02:01-03:00, Sat., 16 Jun. 0.0512 0.0454 0.0480
01:01-02:00, Sat., 16 Jun. 0.0519 0.0444 0.0484
00:01-01:00, Sat., 16 Jun. 0.0531 0.0455 0.0492
23:01-24:00, Fri., 15 Jun. 0.0517 0.0456 0.0482
22:01-23:00, Fri., 15 Jun. 0.0506 0.0441 0.0481
21:01-22:00, Fri., 15 Jun. 0.0507 0.0449 0.0478
20:01-21:00, Fri., 15 Jun. 0.0509 0.0448 0.0480
19:01-20:00, Fri., 15 Jun. 0.0513 0.0452 0.0479
18:01-19:00, Fri., 15 Jun. 0.0518 0.0451 0.0480
17:01-18:00, Fri., 15 Jun. 0.0504 0.0452 0.0479
16:01-17:00, Fri., 15 Jun. 0.0512 0.0453 0.0482
15:01-16:00, Fri., 15 Jun. 0.0530 0.0459 0.0494
14:01-15:00, Fri., 15 Jun. 0.0556 0.0483 0.0521
13:01-14:00, Fri., 15 Jun. 0.0555 0.0474 0.0513
12:01-13:00, Fri., 15 Jun. 0.0550 0.0490 0.0515
11:01-12:00, Fri., 15 Jun. 0.0565 0.0496 0.0528
10:01-11:00, Fri., 15 Jun. 0.0555 0.0471 0.0513
09:01-10:00, Fri., 15 Jun. 0.0539 0.0452 0.0497
08:01-09:00, Fri., 15 Jun. 0.0533 0.0460 0.0488
07:01-08:00, Fri., 15 Jun. 0.0511 0.0450 0.0485
06:01-07:00, Fri., 15 Jun. 0.0526 0.0458 0.0488
05:01-06:00, Fri., 15 Jun. 0.0526 0.0452 0.0486
04:01-05:00, Fri., 15 Jun. 0.0538 0.0463 0.0490
03:01-04:00, Fri., 15 Jun. 0.0524 0.0465 0.0491
02:01-03:00, Fri., 15 Jun. 0.0562 0.0467 0.0511
01:01-02:00, Fri., 15 Jun. 0.0547 0.0474 0.0504
00:01-01:00, Fri., 15 Jun. 0.0523 0.0470 0.0494
23:01-24:00, Thu., 14 Jun. 0.0525 0.0466 0.0492
22:01-23:00, Thu., 14 Jun. 0.0522 0.0460 0.0490
21:01-22:00, Thu., 14 Jun. 0.0521 0.0463 0.0489
20:01-21:00, Thu., 14 Jun. 0.0536 0.0465 0.0494