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

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
10:01-11:00, Sun., 06 Jul. 0.0376 0.0326 0.0351
09:01-10:00, Sun., 06 Jul. 0.0379 0.0324 0.0353
08:01-09:00, Sun., 06 Jul. 0.0377 0.0324 0.0356
07:01-08:00, Sun., 06 Jul. 0.0384 0.0325 0.0354
06:01-07:00, Sun., 06 Jul. 0.0371 0.0331 0.0354
05:01-06:00, Sun., 06 Jul. 0.0382 0.0322 0.0352
04:01-05:00, Sun., 06 Jul. 0.0375 0.0328 0.0352
03:01-04:00, Sun., 06 Jul. 0.0387 0.0332 0.0355
02:01-03:00, Sun., 06 Jul. 0.0391 0.0333 0.0360
01:01-02:00, Sun., 06 Jul. 0.0397 0.0335 0.0361
00:01-01:00, Sun., 06 Jul. 0.0377 0.0326 0.0354
23:01-24:00, Sat., 05 Jul. 0.0388 0.0339 0.0360
22:01-23:00, Sat., 05 Jul. 0.0443 0.0359 0.0396
21:01-22:00, Sat., 05 Jul. 0.0503 0.0420 0.0464
20:01-21:00, Sat., 05 Jul. 0.0513 0.0418 0.0465
19:01-20:00, Sat., 05 Jul. 0.0450 0.0325 0.0371
18:01-19:00, Sat., 05 Jul. 0.0377 0.0315 0.0348
17:01-18:00, Sat., 05 Jul. 0.0374 0.0328 0.0349
16:01-17:00, Sat., 05 Jul. 0.0380 0.0332 0.0352
15:01-16:00, Sat., 05 Jul. 0.0374 0.0325 0.0353
14:01-15:00, Sat., 05 Jul. 0.0383 0.0323 0.0353
13:01-14:00, Sat., 05 Jul. 0.0374 0.0326 0.0354
12:01-13:00, Sat., 05 Jul. 0.0381 0.0330 0.0355
11:01-12:00, Sat., 05 Jul. 0.0388 0.0336 0.0358
10:01-11:00, Sat., 05 Jul. 0.0381 0.0341 0.0359
09:01-10:00, Sat., 05 Jul. 0.0382 0.0334 0.0357
08:01-09:00, Sat., 05 Jul. 0.0381 0.0343 0.0360
07:01-08:00, Sat., 05 Jul. 0.0395 0.0338 0.0361
06:01-07:00, Sat., 05 Jul. 0.0391 0.0336 0.0363
05:01-06:00, Sat., 05 Jul. 0.0389 0.0339 0.0362
04:01-05:00, Sat., 05 Jul. 0.0376 0.0332 0.0359
03:01-04:00, Sat., 05 Jul. 0.0377 0.0328 0.0357
02:01-03:00, Sat., 05 Jul. 0.0386 0.0331 0.0361
01:01-02:00, Sat., 05 Jul. 0.0389 0.0338 0.0364
00:01-01:00, Sat., 05 Jul. 0.0383 0.0335 0.0362
23:01-24:00, Fri., 04 Jul. 0.0388 0.0348 0.0370
22:01-23:00, Fri., 04 Jul. 0.0468 0.0374 0.0417
21:01-22:00, Fri., 04 Jul. 0.0556 0.0454 0.0507
20:01-21:00, Fri., 04 Jul. 0.0531 0.0420 0.0474
19:01-20:00, Fri., 04 Jul. 0.0435 0.0337 0.0380
18:01-19:00, Fri., 04 Jul. 0.0363 0.0325 0.0345
17:01-18:00, Fri., 04 Jul. 0.0367 0.0327 0.0345
16:01-17:00, Fri., 04 Jul. 0.0362 0.0327 0.0345
15:01-16:00, Fri., 04 Jul. 0.0363 0.0318 0.0343
14:01-15:00, Fri., 04 Jul. 0.0381 0.0309 0.0344
13:01-14:00, Fri., 04 Jul. 0.0368 0.0315 0.0347
12:01-13:00, Fri., 04 Jul. 0.0363 0.0311 0.0343
11:01-12:00, Fri., 04 Jul. 0.0372 0.0322 0.0345
10:01-11:00, Fri., 04 Jul. 0.0368 0.0322 0.0345
09:01-10:00, Fri., 04 Jul. 0.0372 0.0322 0.0347
08:01-09:00, Fri., 04 Jul. 0.0372 0.0325 0.0348
07:01-08:00, Fri., 04 Jul. 0.0381 0.0330 0.0352
06:01-07:00, Fri., 04 Jul. 0.0377 0.0332 0.0352
05:01-06:00, Fri., 04 Jul. 0.0386 0.0318 0.0349
04:01-05:00, Fri., 04 Jul. 0.0369 0.0315 0.0348
03:01-04:00, Fri., 04 Jul. 0.0373 0.0322 0.0350
02:01-03:00, Fri., 04 Jul. 0.0376 0.0321 0.0347
01:01-02:00, Fri., 04 Jul. 0.0371 0.0328 0.0347
00:01-01:00, Fri., 04 Jul. 0.0373 0.0322 0.0346
23:01-24:00, Thu., 03 Jul. 0.0369 0.0323 0.0346
22:01-23:00, Thu., 03 Jul. 0.0374 0.0329 0.0346
21:01-22:00, Thu., 03 Jul. 0.0370 0.0318 0.0345
20:01-21:00, Thu., 03 Jul. 0.0373 0.0330 0.0348
19:01-20:00, Thu., 03 Jul. 0.0366 0.0325 0.0347
18:01-19:00, Thu., 03 Jul. 0.0374 0.0322 0.0345
17:01-18:00, Thu., 03 Jul. 0.0370 0.0323 0.0345
16:01-17:00, Thu., 03 Jul. 0.0363 0.0320 0.0342
15:01-16:00, Thu., 03 Jul. 0.0369 0.0321 0.0341
14:01-15:00, Thu., 03 Jul. 0.0372 0.0324 0.0347
13:01-14:00, Thu., 03 Jul. 0.0368 0.0329 0.0346
12:01-13:00, Thu., 03 Jul. 0.0372 0.0325 0.0345
11:01-12:00, Thu., 03 Jul. 0.0370 0.0320 0.0346
10:01-11:00, Thu., 03 Jul. 0.0375 0.0322 0.0346
09:01-10:00, Thu., 03 Jul. 0.0370 0.0330 0.0349
08:01-09:00, Thu., 03 Jul. 0.0396 0.0333 0.0361
07:01-08:00, Thu., 03 Jul. 0.0393 0.0339 0.0367
06:01-07:00, Thu., 03 Jul. 0.0399 0.0346 0.0373
05:01-06:00, Thu., 03 Jul. 0.0391 0.0350 0.0371
04:01-05:00, Thu., 03 Jul. 0.0396 0.0346 0.0369
03:01-04:00, Thu., 03 Jul. 0.0391 0.0335 0.0360
02:01-03:00, Thu., 03 Jul. 0.0369 0.0331 0.0352
01:01-02:00, Thu., 03 Jul. 0.0377 0.0325 0.0350
00:01-01:00, Thu., 03 Jul. 0.0374 0.0328 0.0350
23:01-24:00, Wed., 02 Jul. 0.0375 0.0328 0.0348
22:01-23:00, Wed., 02 Jul. 0.0372 0.0330 0.0350
21:01-22:00, Wed., 02 Jul. 0.0385 0.0329 0.0347
20:01-21:00, Wed., 02 Jul. 0.0372 0.0332 0.0350
19:01-20:00, Wed., 02 Jul. 0.0374 0.0322 0.0348
18:01-19:00, Wed., 02 Jul. 0.0376 0.0325 0.0348
17:01-18:00, Wed., 02 Jul. 0.0381 0.0319 0.0351
16:01-17:00, Wed., 02 Jul. 0.0365 0.0331 0.0351
15:01-16:00, Wed., 02 Jul. 0.0370 0.0328 0.0349
14:01-15:00, Wed., 02 Jul. 0.0386 0.0319 0.0349
13:01-14:00, Wed., 02 Jul. 0.0385 0.0319 0.0351
12:01-13:00, Wed., 02 Jul. 0.0384 0.0329 0.0356
11:01-12:00, Wed., 02 Jul. 0.0377 0.0336 0.0357
10:01-11:00, Wed., 02 Jul. 0.0388 0.0330 0.0363
09:01-10:00, Wed., 02 Jul. 0.0390 0.0335 0.0364
08:01-09:00, Wed., 02 Jul. 0.0401 0.0342 0.0371
07:01-08:00, Wed., 02 Jul. 0.0399 0.0351 0.0374
06:01-07:00, Wed., 02 Jul. 0.0396 0.0339 0.0365
05:01-06:00, Wed., 02 Jul. 0.0383 0.0346 0.0363
04:01-05:00, Wed., 02 Jul. 0.0394 0.0336 0.0361
03:01-04:00, Wed., 02 Jul. 0.0384 0.0332 0.0360
02:01-03:00, Wed., 02 Jul. 0.0388 0.0329 0.0358
01:01-02:00, Wed., 02 Jul. 0.0381 0.0336 0.0356
00:01-01:00, Wed., 02 Jul. 0.0378 0.0336 0.0355
23:01-24:00, Tue., 01 Jul. 0.0391 0.0329 0.0361
22:01-23:00, Tue., 01 Jul. 0.0395 0.0349 0.0376
21:01-22:00, Tue., 01 Jul. 0.0409 0.0356 0.0385
20:01-21:00, Tue., 01 Jul. 0.0424 0.0349 0.0391
19:01-20:00, Tue., 01 Jul. 0.0393 0.0329 0.0357
18:01-19:00, Tue., 01 Jul. 0.0371 0.0322 0.0346
17:01-18:00, Tue., 01 Jul. 0.0371 0.0325 0.0350
16:01-17:00, Tue., 01 Jul. 0.0381 0.0342 0.0357
15:01-16:00, Tue., 01 Jul. 0.0383 0.0339 0.0364
14:01-15:00, Tue., 01 Jul. 0.0384 0.0324 0.0361
13:01-14:00, Tue., 01 Jul. 0.0370 0.0327 0.0347
12:01-13:00, Tue., 01 Jul. 0.0369 0.0332 0.0348
11:01-12:00, Tue., 01 Jul. 0.0373 0.0320 0.0347
10:01-11:00, Tue., 01 Jul. 0.0373 0.0329 0.0349
09:01-10:00, Tue., 01 Jul. 0.0377 0.0334 0.0354
08:01-09:00, Tue., 01 Jul. 0.0381 0.0336 0.0353
07:01-08:00, Tue., 01 Jul. 0.0383 0.0329 0.0359
06:01-07:00, Tue., 01 Jul. 0.0382 0.0333 0.0354
05:01-06:00, Tue., 01 Jul. 0.0377 0.0316 0.0351
04:01-05:00, Tue., 01 Jul. 0.0374 0.0322 0.0350
03:01-04:00, Tue., 01 Jul. 0.0381 0.0332 0.0351
02:01-03:00, Tue., 01 Jul. 0.0376 0.0326 0.0351
01:01-02:00, Tue., 01 Jul. 0.0373 0.0331 0.0351
00:01-01:00, Tue., 01 Jul. 0.0370 0.0325 0.0349
23:01-24:00, Mon., 30 Jun. 0.0370 0.0324 0.0347
22:01-23:00, Mon., 30 Jun. 0.0363 0.0318 0.0346
21:01-22:00, Mon., 30 Jun. 0.0373 0.0326 0.0348
20:01-21:00, Mon., 30 Jun. 0.0369 0.0329 0.0347
19:01-20:00, Mon., 30 Jun. 0.0366 0.0319 0.0344
18:01-19:00, Mon., 30 Jun. 0.0372 0.0325 0.0345
17:01-18:00, Mon., 30 Jun. 0.0373 0.0324 0.0346
16:01-17:00, Mon., 30 Jun. 0.0374 0.0323 0.0347
15:01-16:00, Mon., 30 Jun. 0.0372 0.0325 0.0346
14:01-15:00, Mon., 30 Jun. 0.0370 0.0322 0.0346
13:01-14:00, Mon., 30 Jun. 0.0370 0.0318 0.0346
12:01-13:00, Mon., 30 Jun. 0.0377 0.0327 0.0347
11:01-12:00, Mon., 30 Jun. 0.0367 0.0327 0.0345
10:01-11:00, Mon., 30 Jun. 0.0367 0.0328 0.0347
09:01-10:00, Mon., 30 Jun. 0.0377 0.0324 0.0352
08:01-09:00, Mon., 30 Jun. 0.0391 0.0328 0.0358
07:01-08:00, Mon., 30 Jun. 0.0388 0.0337 0.0360
06:01-07:00, Mon., 30 Jun. 0.0398 0.0336 0.0366
05:01-06:00, Mon., 30 Jun. 0.0385 0.0341 0.0366
04:01-05:00, Mon., 30 Jun. 0.0391 0.0349 0.0369
03:01-04:00, Mon., 30 Jun. 0.0396 0.0343 0.0366
02:01-03:00, Mon., 30 Jun. 0.0390 0.0337 0.0366
01:01-02:00, Mon., 30 Jun. 0.0388 0.0335 0.0360
00:01-01:00, Mon., 30 Jun. 0.0383 0.0335 0.0357
23:01-24:00, Sun., 29 Jun. 0.0372 0.0330 0.0352
22:01-23:00, Sun., 29 Jun. 0.0364 0.0330 0.0348
21:01-22:00, Sun., 29 Jun. 0.0376 0.0318 0.0346
20:01-21:00, Sun., 29 Jun. 0.0374 0.0318 0.0342
19:01-20:00, Sun., 29 Jun. 0.0374 0.0322 0.0347
18:01-19:00, Sun., 29 Jun. 0.0367 0.0320 0.0343
17:01-18:00, Sun., 29 Jun. 0.0365 0.0325 0.0346
16:01-17:00, Sun., 29 Jun. 0.0362 0.0322 0.0343
15:01-16:00, Sun., 29 Jun. 0.0361 0.0322 0.0341
14:01-15:00, Sun., 29 Jun. 0.0366 0.0315 0.0342
13:01-14:00, Sun., 29 Jun. 0.0359 0.0325 0.0344
12:01-13:00, Sun., 29 Jun. 0.0372 0.0323 0.0345
11:01-12:00, Sun., 29 Jun. 0.0370 0.0324 0.0347
10:01-11:00, Sun., 29 Jun. 0.0377 0.0328 0.0350
09:01-10:00, Sun., 29 Jun. 0.0384 0.0334 0.0353
08:01-09:00, Sun., 29 Jun. 0.0375 0.0333 0.0352
07:01-08:00, Sun., 29 Jun. 0.0386 0.0333 0.0355
06:01-07:00, Sun., 29 Jun. 0.0388 0.0332 0.0358
05:01-06:00, Sun., 29 Jun. 0.0374 0.0339 0.0360
04:01-05:00, Sun., 29 Jun. 0.0386 0.0334 0.0358
03:01-04:00, Sun., 29 Jun. 0.0390 0.0337 0.0359
02:01-03:00, Sun., 29 Jun. 0.0382 0.0335 0.0355
01:01-02:00, Sun., 29 Jun. 0.0373 0.0324 0.0347
00:01-01:00, Sun., 29 Jun. 0.0367 0.0323 0.0348
23:01-24:00, Sat., 28 Jun. 0.0377 0.0312 0.0345
22:01-23:00, Sat., 28 Jun. 0.0374 0.0319 0.0345
21:01-22:00, Sat., 28 Jun. 0.0377 0.0325 0.0347
20:01-21:00, Sat., 28 Jun. 0.0365 0.0325 0.0346
19:01-20:00, Sat., 28 Jun. 0.0374 0.0327 0.0349
18:01-19:00, Sat., 28 Jun. 0.0372 0.0326 0.0346
17:01-18:00, Sat., 28 Jun. 0.0377 0.0322 0.0345
16:01-17:00, Sat., 28 Jun. 0.0376 0.0329 0.0346
15:01-16:00, Sat., 28 Jun. 0.0378 0.0319 0.0343
14:01-15:00, Sat., 28 Jun. 0.0362 0.0314 0.0342
13:01-14:00, Sat., 28 Jun. 0.0372 0.0322 0.0343
12:01-13:00, Sat., 28 Jun. 0.0367 0.0320 0.0341
11:01-12:00, Sat., 28 Jun. 0.0375 0.0318 0.0345
10:01-11:00, Sat., 28 Jun. 0.0373 0.0315 0.0341
09:01-10:00, Sat., 28 Jun. 0.0385 0.0322 0.0353
08:01-09:00, Sat., 28 Jun. 0.0387 0.0333 0.0357
07:01-08:00, Sat., 28 Jun. 0.0375 0.0328 0.0355
06:01-07:00, Sat., 28 Jun. 0.0377 0.0329 0.0358
05:01-06:00, Sat., 28 Jun. 0.0384 0.0332 0.0355
04:01-05:00, Sat., 28 Jun. 0.0388 0.0331 0.0360
03:01-04:00, Sat., 28 Jun. 0.0383 0.0331 0.0357
02:01-03:00, Sat., 28 Jun. 0.0375 0.0327 0.0355
01:01-02:00, Sat., 28 Jun. 0.0372 0.0329 0.0351
00:01-01:00, Sat., 28 Jun. 0.0377 0.0330 0.0349
23:01-24:00, Fri., 27 Jun. 0.0367 0.0329 0.0347
22:01-23:00, Fri., 27 Jun. 0.0372 0.0315 0.0343
21:01-22:00, Fri., 27 Jun. 0.0374 0.0318 0.0342
20:01-21:00, Fri., 27 Jun. 0.0366 0.0321 0.0342
19:01-20:00, Fri., 27 Jun. 0.0362 0.0311 0.0339
18:01-19:00, Fri., 27 Jun. 0.0375 0.0315 0.0341
17:01-18:00, Fri., 27 Jun. 0.0361 0.0318 0.0340
16:01-17:00, Fri., 27 Jun. 0.0361 0.0314 0.0339
15:01-16:00, Fri., 27 Jun. 0.0372 0.0319 0.0342
14:01-15:00, Fri., 27 Jun. 0.0356 0.0311 0.0339
13:01-14:00, Fri., 27 Jun. 0.0370 0.0315 0.0340
12:01-13:00, Fri., 27 Jun. 0.0365 0.0319 0.0342
11:01-12:00, Fri., 27 Jun. 0.0369 0.0322 0.0344
10:01-11:00, Fri., 27 Jun. 0.0367 0.0318 0.0346
09:01-10:00, Fri., 27 Jun. 0.0367 0.0313 0.0346
08:01-09:00, Fri., 27 Jun. 0.0372 0.0313 0.0346
07:01-08:00, Fri., 27 Jun. 0.0377 0.0329 0.0350
06:01-07:00, Fri., 27 Jun. 0.0372 0.0332 0.0349
05:01-06:00, Fri., 27 Jun. 0.0370 0.0319 0.0347
04:01-05:00, Fri., 27 Jun. 0.0368 0.0316 0.0345
03:01-04:00, Fri., 27 Jun. 0.0377 0.0325 0.0346
02:01-03:00, Fri., 27 Jun. 0.0368 0.0315 0.0344
01:01-02:00, Fri., 27 Jun. 0.0381 0.0325 0.0346
00:01-01:00, Fri., 27 Jun. 0.0366 0.0325 0.0345
23:01-24:00, Thu., 26 Jun. 0.0380 0.0328 0.0353
22:01-23:00, Thu., 26 Jun. 0.0405 0.0354 0.0376
21:01-22:00, Thu., 26 Jun. 0.0405 0.0349 0.0375
20:01-21:00, Thu., 26 Jun. 0.0429 0.0356 0.0394
19:01-20:00, Thu., 26 Jun. 0.0385 0.0321 0.0353
18:01-19:00, Thu., 26 Jun. 0.0365 0.0314 0.0336
17:01-18:00, Thu., 26 Jun. 0.0356 0.0301 0.0332
16:01-17:00, Thu., 26 Jun. 0.0356 0.0309 0.0330
15:01-16:00, Thu., 26 Jun. 0.0360 0.0311 0.0333
14:01-15:00, Thu., 26 Jun. 0.0357 0.0303 0.0330
13:01-14:00, Thu., 26 Jun. 0.0357 0.0312 0.0333
12:01-13:00, Thu., 26 Jun. 0.0354 0.0316 0.0334
11:01-12:00, Thu., 26 Jun. 0.0353 0.0309 0.0333