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

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
08:01-09:00, Tue., 12 May. 0.0394 0.0342 0.0363
07:01-08:00, Tue., 12 May. 0.0393 0.0337 0.0362
06:01-07:00, Tue., 12 May. 0.0395 0.0349 0.0364
05:01-06:00, Tue., 12 May. 0.0388 0.0336 0.0361
04:01-05:00, Tue., 12 May. 0.0395 0.0345 0.0362
03:01-04:00, Tue., 12 May. 0.0386 0.0347 0.0360
02:01-03:00, Tue., 12 May. 0.0392 0.0343 0.0360
01:01-02:00, Tue., 12 May. 0.0382 0.0346 0.0359
00:01-01:00, Tue., 12 May. 0.0386 0.0340 0.0360
23:01-24:00, Mon., 11 May. 0.0394 0.0342 0.0361
22:01-23:00, Mon., 11 May. 0.0379 0.0335 0.0359
21:01-22:00, Mon., 11 May. 0.0397 0.0337 0.0359
20:01-21:00, Mon., 11 May. 0.0399 0.0334 0.0361
19:01-20:00, Mon., 11 May. 0.0377 0.0345 0.0362
18:01-19:00, Mon., 11 May. 0.0387 0.0333 0.0359
17:01-18:00, Mon., 11 May. 0.0376 0.0339 0.0358
16:01-17:00, Mon., 11 May. 0.0383 0.0335 0.0357
15:01-16:00, Mon., 11 May. 0.0381 0.0341 0.0361
14:01-15:00, Mon., 11 May. 0.0391 0.0332 0.0362
13:01-14:00, Mon., 11 May. 0.0388 0.0333 0.0360
12:01-13:00, Mon., 11 May. 0.0382 0.0339 0.0360
11:01-12:00, Mon., 11 May. 0.0380 0.0343 0.0358
10:01-11:00, Mon., 11 May. 0.0389 0.0339 0.0363
09:01-10:00, Mon., 11 May. 0.0378 0.0330 0.0358
08:01-09:00, Mon., 11 May. 0.0410 0.0342 0.0365
07:01-08:00, Mon., 11 May. 0.0403 0.0342 0.0365
06:01-07:00, Mon., 11 May. 0.0400 0.0331 0.0364
05:01-06:00, Mon., 11 May. 0.0394 0.0339 0.0364
04:01-05:00, Mon., 11 May. 0.0400 0.0340 0.0359
03:01-04:00, Mon., 11 May. 0.0397 0.0342 0.0362
02:01-03:00, Mon., 11 May. 0.0385 0.0338 0.0359
01:01-02:00, Mon., 11 May. 0.0398 0.0338 0.0359
00:01-01:00, Mon., 11 May. 0.0379 0.0341 0.0359
23:01-24:00, Sun., 10 May. 0.0397 0.0336 0.0361
22:01-23:00, Sun., 10 May. 0.0385 0.0341 0.0360
21:01-22:00, Sun., 10 May. 0.0383 0.0334 0.0359
20:01-21:00, Sun., 10 May. 0.0395 0.0335 0.0359
19:01-20:00, Sun., 10 May. 0.0397 0.0339 0.0360
18:01-19:00, Sun., 10 May. 0.0379 0.0342 0.0359
17:01-18:00, Sun., 10 May. 0.0389 0.0339 0.0361
16:01-17:00, Sun., 10 May. 0.0384 0.0337 0.0359
15:01-16:00, Sun., 10 May. 0.0392 0.0337 0.0362
14:01-15:00, Sun., 10 May. 0.0376 0.0336 0.0360
13:01-14:00, Sun., 10 May. 0.0415 0.0339 0.0364
12:01-13:00, Sun., 10 May. 0.0401 0.0338 0.0362
11:01-12:00, Sun., 10 May. 0.0410 0.0338 0.0363
10:01-11:00, Sun., 10 May. 0.0387 0.0337 0.0361
09:01-10:00, Sun., 10 May. 0.0393 0.0338 0.0363
08:01-09:00, Sun., 10 May. 0.0403 0.0350 0.0366
07:01-08:00, Sun., 10 May. 0.0389 0.0346 0.0364
06:01-07:00, Sun., 10 May. 0.0388 0.0343 0.0362
05:01-06:00, Sun., 10 May. 0.0396 0.0340 0.0362
04:01-05:00, Sun., 10 May. 0.0386 0.0339 0.0359
03:01-04:00, Sun., 10 May. 0.0398 0.0337 0.0360
02:01-03:00, Sun., 10 May. 0.0402 0.0339 0.0359
01:01-02:00, Sun., 10 May. 0.0381 0.0336 0.0360
00:01-01:00, Sun., 10 May. 0.0398 0.0335 0.0361
23:01-24:00, Sat., 09 May. 0.0386 0.0332 0.0359
22:01-23:00, Sat., 09 May. 0.0384 0.0340 0.0359
21:01-22:00, Sat., 09 May. 0.0390 0.0329 0.0361
20:01-21:00, Sat., 09 May. 0.0390 0.0342 0.0359
19:01-20:00, Sat., 09 May. 0.0394 0.0341 0.0360
18:01-19:00, Sat., 09 May. 0.0425 0.0336 0.0361
17:01-18:00, Sat., 09 May. 0.0393 0.0343 0.0362
16:01-17:00, Sat., 09 May. 0.0378 0.0339 0.0361
15:01-16:00, Sat., 09 May. 0.0383 0.0339 0.0359
14:01-15:00, Sat., 09 May. 0.0395 0.0340 0.0362
13:01-14:00, Sat., 09 May. 0.0386 0.0328 0.0362
12:01-13:00, Sat., 09 May. 0.0392 0.0339 0.0363
11:01-12:00, Sat., 09 May. 0.0372 0.0336 0.0360
10:01-11:00, Sat., 09 May. 0.0390 0.0341 0.0362
09:01-10:00, Sat., 09 May. 0.0382 0.0331 0.0361
08:01-09:00, Sat., 09 May. 0.0386 0.0348 0.0363
07:01-08:00, Sat., 09 May. 0.0396 0.0333 0.0361
06:01-07:00, Sat., 09 May. 0.0382 0.0335 0.0361
05:01-06:00, Sat., 09 May. 0.0379 0.0336 0.0359
04:01-05:00, Sat., 09 May. 0.0387 0.0339 0.0360
03:01-04:00, Sat., 09 May. 0.0400 0.0333 0.0360
02:01-03:00, Sat., 09 May. 0.0417 0.0339 0.0365
01:01-02:00, Sat., 09 May. 0.0390 0.0344 0.0362
00:01-01:00, Sat., 09 May. 0.0396 0.0338 0.0363
23:01-24:00, Fri., 08 May. 0.0397 0.0337 0.0365
22:01-23:00, Fri., 08 May. 0.0387 0.0344 0.0361
21:01-22:00, Fri., 08 May. 0.0399 0.0343 0.0362
20:01-21:00, Fri., 08 May. 0.0380 0.0342 0.0360
19:01-20:00, Fri., 08 May. 0.0399 0.0336 0.0361
18:01-19:00, Fri., 08 May. 0.0386 0.0340 0.0362
17:01-18:00, Fri., 08 May. 0.0377 0.0341 0.0357
16:01-17:00, Fri., 08 May. 0.0390 0.0338 0.0363
15:01-16:00, Fri., 08 May. 0.0406 0.0338 0.0359
14:01-15:00, Fri., 08 May. 0.0397 0.0331 0.0362
13:01-14:00, Fri., 08 May. 0.0386 0.0342 0.0364
12:01-13:00, Fri., 08 May. 0.0382 0.0341 0.0359
11:01-12:00, Fri., 08 May. 0.0375 0.0339 0.0360
10:01-11:00, Fri., 08 May. 0.0389 0.0338 0.0360
09:01-10:00, Fri., 08 May. 0.0391 0.0345 0.0362
08:01-09:00, Fri., 08 May. 0.0393 0.0339 0.0360
07:01-08:00, Fri., 08 May. 0.0378 0.0338 0.0360
06:01-07:00, Fri., 08 May. 0.0396 0.0338 0.0359
05:01-06:00, Fri., 08 May. 0.0381 0.0342 0.0360
04:01-05:00, Fri., 08 May. 0.0390 0.0336 0.0360
03:01-04:00, Fri., 08 May. 0.0396 0.0346 0.0362
02:01-03:00, Fri., 08 May. 0.0388 0.0341 0.0361
01:01-02:00, Fri., 08 May. 0.0379 0.0341 0.0358
00:01-01:00, Fri., 08 May. 0.0389 0.0342 0.0360
23:01-24:00, Thu., 07 May. 0.0374 0.0339 0.0358
22:01-23:00, Thu., 07 May. 0.0378 0.0338 0.0359
21:01-22:00, Thu., 07 May. 0.0388 0.0344 0.0360
20:01-21:00, Thu., 07 May. 0.0389 0.0342 0.0360
19:01-20:00, Thu., 07 May. 0.0384 0.0341 0.0357
18:01-19:00, Thu., 07 May. 0.0379 0.0339 0.0359
17:01-18:00, Thu., 07 May. 0.0371 0.0337 0.0355
16:01-17:00, Thu., 07 May. 0.0373 0.0339 0.0354
15:01-16:00, Thu., 07 May. 0.0392 0.0337 0.0358
14:01-15:00, Thu., 07 May. 0.0379 0.0339 0.0360
13:01-14:00, Thu., 07 May. 0.0397 0.0339 0.0357
12:01-13:00, Thu., 07 May. 0.0386 0.0340 0.0360
11:01-12:00, Thu., 07 May. 0.0380 0.0337 0.0361
10:01-11:00, Thu., 07 May. 0.0392 0.0343 0.0361
09:01-10:00, Thu., 07 May. 0.0392 0.0329 0.0360
08:01-09:00, Thu., 07 May. 0.0418 0.0341 0.0362
07:01-08:00, Thu., 07 May. 0.0390 0.0345 0.0365
06:01-07:00, Thu., 07 May. 0.0398 0.0342 0.0365
05:01-06:00, Thu., 07 May. 0.0387 0.0339 0.0363
04:01-05:00, Thu., 07 May. 0.0398 0.0339 0.0363
03:01-04:00, Thu., 07 May. 0.0392 0.0336 0.0359
02:01-03:00, Thu., 07 May. 0.0401 0.0338 0.0362
01:01-02:00, Thu., 07 May. 0.0383 0.0341 0.0359
00:01-01:00, Thu., 07 May. 0.0387 0.0327 0.0357
23:01-24:00, Wed., 06 May. 0.0376 0.0329 0.0357
22:01-23:00, Wed., 06 May. 0.0397 0.0332 0.0357
21:01-22:00, Wed., 06 May. 0.0372 0.0334 0.0355
20:01-21:00, Wed., 06 May. 0.0375 0.0336 0.0357
19:01-20:00, Wed., 06 May. 0.0383 0.0328 0.0356
18:01-19:00, Wed., 06 May. 0.0391 0.0335 0.0361
17:01-18:00, Wed., 06 May. 0.0378 0.0337 0.0359
16:01-17:00, Wed., 06 May. 0.0389 0.0327 0.0359
15:01-16:00, Wed., 06 May. 0.0390 0.0339 0.0360
14:01-15:00, Wed., 06 May. 0.0377 0.0336 0.0358
13:01-14:00, Wed., 06 May. 0.0387 0.0331 0.0358
12:01-13:00, Wed., 06 May. 0.0386 0.0337 0.0357
11:01-12:00, Wed., 06 May. 0.0395 0.0336 0.0361
10:01-11:00, Wed., 06 May. 0.0390 0.0346 0.0365
09:01-10:00, Wed., 06 May. 0.0410 0.0338 0.0363
08:01-09:00, Wed., 06 May. 0.0378 0.0341 0.0362
07:01-08:00, Wed., 06 May. 0.0394 0.0334 0.0360
06:01-07:00, Wed., 06 May. 0.0397 0.0344 0.0360
05:01-06:00, Wed., 06 May. 0.0371 0.0333 0.0356
04:01-05:00, Wed., 06 May. 0.0388 0.0334 0.0359
03:01-04:00, Wed., 06 May. 0.0374 0.0338 0.0356
02:01-03:00, Wed., 06 May. 0.0386 0.0335 0.0359
01:01-02:00, Wed., 06 May. 0.0386 0.0332 0.0357
00:01-01:00, Wed., 06 May. 0.0373 0.0345 0.0359
23:01-24:00, Tue., 05 May. 0.0391 0.0337 0.0358
22:01-23:00, Tue., 05 May. 0.0380 0.0334 0.0357
21:01-22:00, Tue., 05 May. 0.0374 0.0339 0.0360
20:01-21:00, Tue., 05 May. 0.0381 0.0332 0.0357
19:01-20:00, Tue., 05 May. 0.0385 0.0340 0.0358
18:01-19:00, Tue., 05 May. 0.0371 0.0325 0.0357
17:01-18:00, Tue., 05 May. 0.0391 0.0332 0.0356
16:01-17:00, Tue., 05 May. 0.0401 0.0332 0.0358
15:01-16:00, Tue., 05 May. 0.0400 0.0341 0.0362
14:01-15:00, Tue., 05 May. 0.0381 0.0337 0.0359
13:01-14:00, Tue., 05 May. 0.0403 0.0343 0.0359
12:01-13:00, Tue., 05 May. 0.0384 0.0340 0.0360
11:01-12:00, Tue., 05 May. 0.0386 0.0339 0.0358
10:01-11:00, Tue., 05 May. 0.0393 0.0337 0.0362
09:01-10:00, Tue., 05 May. 0.0377 0.0325 0.0359
08:01-09:00, Tue., 05 May. 0.0390 0.0337 0.0362
07:01-08:00, Tue., 05 May. 0.0380 0.0340 0.0360
06:01-07:00, Tue., 05 May. 0.0412 0.0331 0.0360
05:01-06:00, Tue., 05 May. 0.0383 0.0339 0.0358
04:01-05:00, Tue., 05 May. 0.0390 0.0339 0.0360
03:01-04:00, Tue., 05 May. 0.0391 0.0340 0.0357
02:01-03:00, Tue., 05 May. 0.0371 0.0332 0.0358
01:01-02:00, Tue., 05 May. 0.0385 0.0338 0.0359
00:01-01:00, Tue., 05 May. 0.0377 0.0329 0.0357
23:01-24:00, Mon., 04 May. 0.0389 0.0339 0.0360
22:01-23:00, Mon., 04 May. 0.0388 0.0340 0.0361
21:01-22:00, Mon., 04 May. 0.0393 0.0342 0.0359
20:01-21:00, Mon., 04 May. 0.0395 0.0346 0.0362
19:01-20:00, Mon., 04 May. 0.0386 0.0336 0.0360
18:01-19:00, Mon., 04 May. 0.0381 0.0336 0.0360
17:01-18:00, Mon., 04 May. 0.0387 0.0333 0.0359
16:01-17:00, Mon., 04 May. 0.0387 0.0336 0.0361
15:01-16:00, Mon., 04 May. 0.0402 0.0341 0.0362
14:01-15:00, Mon., 04 May. 0.0393 0.0342 0.0365
13:01-14:00, Mon., 04 May. 0.0391 0.0345 0.0364
12:01-13:00, Mon., 04 May. 0.0393 0.0335 0.0363
11:01-12:00, Mon., 04 May. 0.0393 0.0348 0.0365
10:01-11:00, Mon., 04 May. 0.0408 0.0338 0.0364
09:01-10:00, Mon., 04 May. 0.0384 0.0342 0.0363
08:01-09:00, Mon., 04 May. 0.0394 0.0343 0.0366
07:01-08:00, Mon., 04 May. 0.0433 0.0357 0.0390
06:01-07:00, Mon., 04 May. 0.0519 0.0401 0.0454
05:01-06:00, Mon., 04 May. 0.0500 0.0385 0.0447
04:01-05:00, Mon., 04 May. 0.0422 0.0353 0.0376
03:01-04:00, Mon., 04 May. 0.0401 0.0341 0.0366
02:01-03:00, Mon., 04 May. 0.0377 0.0332 0.0358
01:01-02:00, Mon., 04 May. 0.0387 0.0338 0.0362
00:01-01:00, Mon., 04 May. 0.0416 0.0331 0.0357
23:01-24:00, Sun., 03 May. 0.0382 0.0332 0.0357
22:01-23:00, Sun., 03 May. 0.0386 0.0333 0.0361
21:01-22:00, Sun., 03 May. 0.0394 0.0337 0.0363
20:01-21:00, Sun., 03 May. 0.0396 0.0340 0.0362
19:01-20:00, Sun., 03 May. 0.0379 0.0336 0.0357
18:01-19:00, Sun., 03 May. 0.0385 0.0332 0.0356
17:01-18:00, Sun., 03 May. 0.0379 0.0339 0.0359
16:01-17:00, Sun., 03 May. 0.0387 0.0336 0.0359
15:01-16:00, Sun., 03 May. 0.0403 0.0329 0.0362
14:01-15:00, Sun., 03 May. 0.0376 0.0338 0.0361
13:01-14:00, Sun., 03 May. 0.0387 0.0342 0.0362
12:01-13:00, Sun., 03 May. 0.0408 0.0345 0.0366
11:01-12:00, Sun., 03 May. 0.0396 0.0349 0.0368
10:01-11:00, Sun., 03 May. 0.0404 0.0341 0.0365
09:01-10:00, Sun., 03 May. 0.0396 0.0346 0.0367
08:01-09:00, Sun., 03 May. 0.0399 0.0352 0.0368
07:01-08:00, Sun., 03 May. 0.0403 0.0344 0.0370
06:01-07:00, Sun., 03 May. 0.0397 0.0352 0.0368
05:01-06:00, Sun., 03 May. 0.0393 0.0351 0.0369
04:01-05:00, Sun., 03 May. 0.0398 0.0351 0.0369
03:01-04:00, Sun., 03 May. 0.0397 0.0345 0.0368
02:01-03:00, Sun., 03 May. 0.0403 0.0345 0.0366
01:01-02:00, Sun., 03 May. 0.0390 0.0339 0.0366
00:01-01:00, Sun., 03 May. 0.0389 0.0346 0.0364
23:01-24:00, Sat., 02 May. 0.0393 0.0345 0.0362
22:01-23:00, Sat., 02 May. 0.0379 0.0339 0.0360
21:01-22:00, Sat., 02 May. 0.0386 0.0343 0.0361
20:01-21:00, Sat., 02 May. 0.0389 0.0335 0.0361
19:01-20:00, Sat., 02 May. 0.0400 0.0338 0.0360
18:01-19:00, Sat., 02 May. 0.0382 0.0338 0.0359
17:01-18:00, Sat., 02 May. 0.0377 0.0342 0.0359
16:01-17:00, Sat., 02 May. 0.0388 0.0336 0.0359
15:01-16:00, Sat., 02 May. 0.0389 0.0340 0.0361
14:01-15:00, Sat., 02 May. 0.0392 0.0339 0.0360
13:01-14:00, Sat., 02 May. 0.0391 0.0335 0.0361
12:01-13:00, Sat., 02 May. 0.0394 0.0330 0.0361
11:01-12:00, Sat., 02 May. 0.0374 0.0344 0.0359
10:01-11:00, Sat., 02 May. 0.0390 0.0340 0.0361
09:01-10:00, Sat., 02 May. 0.0396 0.0338 0.0361