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
12:01-13:00, Sat., 27 Jul. 0.0367 0.0317 0.0345
11:01-12:00, Sat., 27 Jul. 0.0367 0.0315 0.0348
10:01-11:00, Sat., 27 Jul. 0.0380 0.0332 0.0354
09:01-10:00, Sat., 27 Jul. 0.0377 0.0336 0.0354
08:01-09:00, Sat., 27 Jul. 0.0381 0.0335 0.0355
07:01-08:00, Sat., 27 Jul. 0.0387 0.0336 0.0361
06:01-07:00, Sat., 27 Jul. 0.0384 0.0340 0.0362
05:01-06:00, Sat., 27 Jul. 0.0387 0.0332 0.0355
04:01-05:00, Sat., 27 Jul. 0.0377 0.0329 0.0352
03:01-04:00, Sat., 27 Jul. 0.0372 0.0328 0.0353
02:01-03:00, Sat., 27 Jul. 0.0380 0.0320 0.0347
01:01-02:00, Sat., 27 Jul. 0.0377 0.0315 0.0350
00:01-01:00, Sat., 27 Jul. 0.0378 0.0332 0.0355
23:01-24:00, Fri., 26 Jul. 0.0401 0.0340 0.0361
22:01-23:00, Fri., 26 Jul. 0.0423 0.0356 0.0386
21:01-22:00, Fri., 26 Jul. 0.0410 0.0354 0.0379
20:01-21:00, Fri., 26 Jul. 0.0381 0.0332 0.0357
19:01-20:00, Fri., 26 Jul. 0.0372 0.0316 0.0343
18:01-19:00, Fri., 26 Jul. 0.0363 0.0321 0.0341
17:01-18:00, Fri., 26 Jul. 0.0375 0.0322 0.0344
16:01-17:00, Fri., 26 Jul. 0.0367 0.0324 0.0343
15:01-16:00, Fri., 26 Jul. 0.0366 0.0322 0.0343
14:01-15:00, Fri., 26 Jul. 0.0367 0.0315 0.0343
13:01-14:00, Fri., 26 Jul. 0.0378 0.0322 0.0344
12:01-13:00, Fri., 26 Jul. 0.0367 0.0325 0.0344
11:01-12:00, Fri., 26 Jul. 0.0374 0.0328 0.0345
10:01-11:00, Fri., 26 Jul. 0.0373 0.0319 0.0345
09:01-10:00, Fri., 26 Jul. 0.0377 0.0315 0.0348
08:01-09:00, Fri., 26 Jul. 0.0372 0.0328 0.0349
07:01-08:00, Fri., 26 Jul. 0.0381 0.0336 0.0356
06:01-07:00, Fri., 26 Jul. 0.0376 0.0332 0.0356
05:01-06:00, Fri., 26 Jul. 0.0379 0.0342 0.0361
04:01-05:00, Fri., 26 Jul. 0.0403 0.0336 0.0364
03:01-04:00, Fri., 26 Jul. 0.0376 0.0329 0.0356
02:01-03:00, Fri., 26 Jul. 0.0368 0.0309 0.0349
01:01-02:00, Fri., 26 Jul. 0.0372 0.0332 0.0349
00:01-01:00, Fri., 26 Jul. 0.0381 0.0328 0.0347
23:01-24:00, Thu., 25 Jul. 0.0368 0.0328 0.0350
22:01-23:00, Thu., 25 Jul. 0.0376 0.0325 0.0348
21:01-22:00, Thu., 25 Jul. 0.0372 0.0316 0.0348
20:01-21:00, Thu., 25 Jul. 0.0371 0.0330 0.0352
19:01-20:00, Thu., 25 Jul. 0.0385 0.0332 0.0359
18:01-19:00, Thu., 25 Jul. 0.0397 0.0350 0.0372
17:01-18:00, Thu., 25 Jul. 0.0415 0.0354 0.0390
16:01-17:00, Thu., 25 Jul. 0.0398 0.0327 0.0358
15:01-16:00, Thu., 25 Jul. 0.0374 0.0319 0.0343
14:01-15:00, Thu., 25 Jul. 0.0362 0.0311 0.0343
13:01-14:00, Thu., 25 Jul. 0.0367 0.0322 0.0345
12:01-13:00, Thu., 25 Jul. 0.0372 0.0304 0.0344
11:01-12:00, Thu., 25 Jul. 0.0372 0.0327 0.0346
10:01-11:00, Thu., 25 Jul. 0.0371 0.0322 0.0345
09:01-10:00, Thu., 25 Jul. 0.0381 0.0324 0.0348
08:01-09:00, Thu., 25 Jul. 0.0384 0.0329 0.0357
07:01-08:00, Thu., 25 Jul. 0.0390 0.0333 0.0365
06:01-07:00, Thu., 25 Jul. 0.0395 0.0342 0.0367
05:01-06:00, Thu., 25 Jul. 0.0395 0.0337 0.0362
04:01-05:00, Thu., 25 Jul. 0.0384 0.0332 0.0360
03:01-04:00, Thu., 25 Jul. 0.0388 0.0344 0.0362
02:01-03:00, Thu., 25 Jul. 0.0381 0.0334 0.0358
01:01-02:00, Thu., 25 Jul. 0.0375 0.0332 0.0352
00:01-01:00, Thu., 25 Jul. 0.0378 0.0325 0.0351
23:01-24:00, Wed., 24 Jul. 0.0377 0.0330 0.0347
22:01-23:00, Wed., 24 Jul. 0.0389 0.0330 0.0350
21:01-22:00, Wed., 24 Jul. 0.0376 0.0323 0.0347
20:01-21:00, Wed., 24 Jul. 0.0364 0.0326 0.0344
19:01-20:00, Wed., 24 Jul. 0.0361 0.0316 0.0341
18:01-19:00, Wed., 24 Jul. 0.0367 0.0319 0.0340
17:01-18:00, Wed., 24 Jul. 0.0361 0.0315 0.0339
16:01-17:00, Wed., 24 Jul. 0.0364 0.0313 0.0339
15:01-16:00, Wed., 24 Jul. 0.0371 0.0318 0.0344
14:01-15:00, Wed., 24 Jul. 0.0388 0.0336 0.0357
13:01-14:00, Wed., 24 Jul. 0.0425 0.0350 0.0383
12:01-13:00, Wed., 24 Jul. 0.0451 0.0321 0.0406
11:01-12:00, Wed., 24 Jul. 0.0375 0.0327 0.0352
10:01-11:00, Wed., 24 Jul. 0.0377 0.0330 0.0352
09:01-10:00, Wed., 24 Jul. 0.0379 0.0336 0.0356
08:01-09:00, Wed., 24 Jul. 0.0387 0.0334 0.0356
07:01-08:00, Wed., 24 Jul. 0.0377 0.0329 0.0353
06:01-07:00, Wed., 24 Jul. 0.0381 0.0327 0.0360
05:01-06:00, Wed., 24 Jul. 0.0387 0.0339 0.0362
04:01-05:00, Wed., 24 Jul. 0.0395 0.0346 0.0366
03:01-04:00, Wed., 24 Jul. 0.0380 0.0339 0.0359
02:01-03:00, Wed., 24 Jul. 0.0384 0.0339 0.0362
01:01-02:00, Wed., 24 Jul. 0.0381 0.0332 0.0357
00:01-01:00, Wed., 24 Jul. 0.0381 0.0319 0.0357
23:01-24:00, Tue., 23 Jul. 0.0385 0.0329 0.0356
22:01-23:00, Tue., 23 Jul. 0.0384 0.0321 0.0357
21:01-22:00, Tue., 23 Jul. 0.0368 0.0315 0.0344
20:01-21:00, Tue., 23 Jul. 0.0377 0.0328 0.0348
19:01-20:00, Tue., 23 Jul. 0.0376 0.0315 0.0344
18:01-19:00, Tue., 23 Jul. 0.0377 0.0321 0.0349
17:01-18:00, Tue., 23 Jul. 0.0362 0.0322 0.0343
16:01-17:00, Tue., 23 Jul. 0.0377 0.0324 0.0348
15:01-16:00, Tue., 23 Jul. 0.0376 0.0318 0.0347
14:01-15:00, Tue., 23 Jul. 0.0374 0.0314 0.0345
13:01-14:00, Tue., 23 Jul. 0.0380 0.0322 0.0346
12:01-13:00, Tue., 23 Jul. 0.0370 0.0313 0.0344
11:01-12:00, Tue., 23 Jul. 0.0374 0.0318 0.0344
10:01-11:00, Tue., 23 Jul. 0.0365 0.0324 0.0343
09:01-10:00, Tue., 23 Jul. 0.0371 0.0326 0.0346
08:01-09:00, Tue., 23 Jul. 0.0370 0.0332 0.0351
07:01-08:00, Tue., 23 Jul. 0.0377 0.0325 0.0352
06:01-07:00, Tue., 23 Jul. 0.0381 0.0328 0.0355
05:01-06:00, Tue., 23 Jul. 0.0384 0.0336 0.0357
04:01-05:00, Tue., 23 Jul. 0.0380 0.0340 0.0356
03:01-04:00, Tue., 23 Jul. 0.0384 0.0328 0.0356
02:01-03:00, Tue., 23 Jul. 0.0378 0.0322 0.0355
01:01-02:00, Tue., 23 Jul. 0.0378 0.0331 0.0355
00:01-01:00, Tue., 23 Jul. 0.0374 0.0325 0.0353
23:01-24:00, Mon., 22 Jul. 0.0377 0.0315 0.0354
22:01-23:00, Mon., 22 Jul. 0.0370 0.0331 0.0349
21:01-22:00, Mon., 22 Jul. 0.0371 0.0321 0.0345
20:01-21:00, Mon., 22 Jul. 0.0379 0.0322 0.0348
19:01-20:00, Mon., 22 Jul. 0.0388 0.0324 0.0354
18:01-19:00, Mon., 22 Jul. 0.0368 0.0317 0.0343
17:01-18:00, Mon., 22 Jul. 0.0375 0.0330 0.0349
16:01-17:00, Mon., 22 Jul. 0.0391 0.0329 0.0360
15:01-16:00, Mon., 22 Jul. 0.0433 0.0354 0.0393
14:01-15:00, Mon., 22 Jul. 0.0447 0.0318 0.0388
13:01-14:00, Mon., 22 Jul. 0.0364 0.0326 0.0349
12:01-13:00, Mon., 22 Jul. 0.0377 0.0330 0.0351
11:01-12:00, Mon., 22 Jul. 0.0372 0.0331 0.0352
10:01-11:00, Mon., 22 Jul. 0.0376 0.0329 0.0350
09:01-10:00, Mon., 22 Jul. 0.0385 0.0329 0.0356
08:01-09:00, Mon., 22 Jul. 0.0381 0.0332 0.0357
07:01-08:00, Mon., 22 Jul. 0.0387 0.0335 0.0362
06:01-07:00, Mon., 22 Jul. 0.0389 0.0337 0.0364
05:01-06:00, Mon., 22 Jul. 0.0387 0.0339 0.0362
04:01-05:00, Mon., 22 Jul. 0.0385 0.0322 0.0360
03:01-04:00, Mon., 22 Jul. 0.0382 0.0319 0.0351
02:01-03:00, Mon., 22 Jul. 0.0376 0.0316 0.0354
01:01-02:00, Mon., 22 Jul. 0.0374 0.0316 0.0349
00:01-01:00, Mon., 22 Jul. 0.0365 0.0326 0.0345
23:01-24:00, Sun., 21 Jul. 0.0374 0.0320 0.0345
22:01-23:00, Sun., 21 Jul. 0.0369 0.0318 0.0342
21:01-22:00, Sun., 21 Jul. 0.0360 0.0323 0.0341
20:01-21:00, Sun., 21 Jul. 0.0365 0.0323 0.0344
19:01-20:00, Sun., 21 Jul. 0.0373 0.0318 0.0342
18:01-19:00, Sun., 21 Jul. 0.0362 0.0317 0.0340
17:01-18:00, Sun., 21 Jul. 0.0367 0.0315 0.0337
16:01-17:00, Sun., 21 Jul. 0.0363 0.0318 0.0340
15:01-16:00, Sun., 21 Jul. 0.0358 0.0312 0.0340
14:01-15:00, Sun., 21 Jul. 0.0370 0.0318 0.0341
13:01-14:00, Sun., 21 Jul. 0.0363 0.0317 0.0340
12:01-13:00, Sun., 21 Jul. 0.0371 0.0318 0.0341
11:01-12:00, Sun., 21 Jul. 0.0363 0.0321 0.0343
10:01-11:00, Sun., 21 Jul. 0.0364 0.0308 0.0341
09:01-10:00, Sun., 21 Jul. 0.0370 0.0328 0.0348
08:01-09:00, Sun., 21 Jul. 0.0376 0.0328 0.0348
07:01-08:00, Sun., 21 Jul. 0.0381 0.0331 0.0355
06:01-07:00, Sun., 21 Jul. 0.0383 0.0327 0.0355
05:01-06:00, Sun., 21 Jul. 0.0379 0.0324 0.0353
04:01-05:00, Sun., 21 Jul. 0.0388 0.0331 0.0358
03:01-04:00, Sun., 21 Jul. 0.0399 0.0326 0.0358
02:01-03:00, Sun., 21 Jul. 0.0374 0.0322 0.0344
01:01-02:00, Sun., 21 Jul. 0.0372 0.0321 0.0342
00:01-01:00, Sun., 21 Jul. 0.0377 0.0325 0.0350
23:01-24:00, Sat., 20 Jul. 0.0398 0.0339 0.0367
22:01-23:00, Sat., 20 Jul. 0.0410 0.0321 0.0364
21:01-22:00, Sat., 20 Jul. 0.0367 0.0321 0.0348
20:01-21:00, Sat., 20 Jul. 0.0367 0.0324 0.0344
19:01-20:00, Sat., 20 Jul. 0.0372 0.0322 0.0349
18:01-19:00, Sat., 20 Jul. 0.0375 0.0322 0.0345
17:01-18:00, Sat., 20 Jul. 0.0372 0.0319 0.0346
16:01-17:00, Sat., 20 Jul. 0.0369 0.0328 0.0350
15:01-16:00, Sat., 20 Jul. 0.0370 0.0322 0.0348
14:01-15:00, Sat., 20 Jul. 0.0379 0.0327 0.0347
13:01-14:00, Sat., 20 Jul. 0.0373 0.0315 0.0350
12:01-13:00, Sat., 20 Jul. 0.0359 0.0322 0.0345
11:01-12:00, Sat., 20 Jul. 0.0372 0.0312 0.0342
10:01-11:00, Sat., 20 Jul. 0.0371 0.0315 0.0339
09:01-10:00, Sat., 20 Jul. 0.0362 0.0318 0.0340
08:01-09:00, Sat., 20 Jul. 0.0370 0.0318 0.0342
07:01-08:00, Sat., 20 Jul. 0.0363 0.0311 0.0343
06:01-07:00, Sat., 20 Jul. 0.0388 0.0339 0.0360
05:01-06:00, Sat., 20 Jul. 0.0384 0.0336 0.0357
04:01-05:00, Sat., 20 Jul. 0.0383 0.0336 0.0358
03:01-04:00, Sat., 20 Jul. 0.0366 0.0329 0.0348
02:01-03:00, Sat., 20 Jul. 0.0370 0.0327 0.0348
01:01-02:00, Sat., 20 Jul. 0.0369 0.0326 0.0344
00:01-01:00, Sat., 20 Jul. 0.0362 0.0318 0.0341
23:01-24:00, Fri., 19 Jul. 0.0364 0.0318 0.0337
22:01-23:00, Fri., 19 Jul. 0.0357 0.0315 0.0335
21:01-22:00, Fri., 19 Jul. 0.0367 0.0312 0.0336
20:01-21:00, Fri., 19 Jul. 0.0357 0.0311 0.0338
19:01-20:00, Fri., 19 Jul. 0.0363 0.0310 0.0338
18:01-19:00, Fri., 19 Jul. 0.0350 0.0311 0.0334
17:01-18:00, Fri., 19 Jul. 0.0359 0.0311 0.0335
16:01-17:00, Fri., 19 Jul. 0.0357 0.0309 0.0335
15:01-16:00, Fri., 19 Jul. 0.0350 0.0311 0.0334
14:01-15:00, Fri., 19 Jul. 0.0355 0.0308 0.0333
13:01-14:00, Fri., 19 Jul. 0.0356 0.0315 0.0333
12:01-13:00, Fri., 19 Jul. 0.0349 0.0311 0.0332
11:01-12:00, Fri., 19 Jul. 0.0352 0.0294 0.0330
10:01-11:00, Fri., 19 Jul. 0.0349 0.0301 0.0332
09:01-10:00, Fri., 19 Jul. 0.0356 0.0316 0.0335
08:01-09:00, Fri., 19 Jul. 0.0381 0.0318 0.0342
07:01-08:00, Fri., 19 Jul. 0.0386 0.0333 0.0352
06:01-07:00, Fri., 19 Jul. 0.0377 0.0335 0.0360
05:01-06:00, Fri., 19 Jul. 0.0388 0.0347 0.0363
04:01-05:00, Fri., 19 Jul. 0.0384 0.0332 0.0361
03:01-04:00, Fri., 19 Jul. 0.0374 0.0324 0.0352
02:01-03:00, Fri., 19 Jul. 0.0374 0.0320 0.0355
01:01-02:00, Fri., 19 Jul. 0.0375 0.0336 0.0356
00:01-01:00, Fri., 19 Jul. 0.0379 0.0330 0.0350
23:01-24:00, Thu., 18 Jul. 0.0371 0.0315 0.0339
22:01-23:00, Thu., 18 Jul. 0.0367 0.0311 0.0338
21:01-22:00, Thu., 18 Jul. 0.0357 0.0310 0.0335
20:01-21:00, Thu., 18 Jul. 0.0356 0.0315 0.0336
19:01-20:00, Thu., 18 Jul. 0.0359 0.0308 0.0338
18:01-19:00, Thu., 18 Jul. 0.0358 0.0311 0.0335
17:01-18:00, Thu., 18 Jul. 0.0360 0.0313 0.0334
16:01-17:00, Thu., 18 Jul. 0.0354 0.0304 0.0333
15:01-16:00, Thu., 18 Jul. 0.0353 0.0313 0.0335
14:01-15:00, Thu., 18 Jul. 0.0355 0.0318 0.0336
13:01-14:00, Thu., 18 Jul. 0.0351 0.0306 0.0333
12:01-13:00, Thu., 18 Jul. 0.0361 0.0315 0.0337
11:01-12:00, Thu., 18 Jul. 0.0367 0.0318 0.0337
10:01-11:00, Thu., 18 Jul. 0.0366 0.0319 0.0344
09:01-10:00, Thu., 18 Jul. 0.0367 0.0322 0.0346
08:01-09:00, Thu., 18 Jul. 0.0394 0.0334 0.0359
07:01-08:00, Thu., 18 Jul. 0.0383 0.0333 0.0361
06:01-07:00, Thu., 18 Jul. 0.0385 0.0339 0.0369
05:01-06:00, Thu., 18 Jul. 0.0386 0.0342 0.0363
04:01-05:00, Thu., 18 Jul. 0.0379 0.0336 0.0353
03:01-04:00, Thu., 18 Jul. 0.0375 0.0330 0.0351
02:01-03:00, Thu., 18 Jul. 0.0370 0.0317 0.0350
01:01-02:00, Thu., 18 Jul. 0.0368 0.0333 0.0349
00:01-01:00, Thu., 18 Jul. 0.0370 0.0319 0.0339
23:01-24:00, Wed., 17 Jul. 0.0373 0.0311 0.0338
22:01-23:00, Wed., 17 Jul. 0.0358 0.0317 0.0336
21:01-22:00, Wed., 17 Jul. 0.0363 0.0314 0.0337
20:01-21:00, Wed., 17 Jul. 0.0362 0.0310 0.0336
19:01-20:00, Wed., 17 Jul. 0.0360 0.0303 0.0335
18:01-19:00, Wed., 17 Jul. 0.0370 0.0310 0.0337
17:01-18:00, Wed., 17 Jul. 0.0370 0.0321 0.0342
16:01-17:00, Wed., 17 Jul. 0.0383 0.0329 0.0354
15:01-16:00, Wed., 17 Jul. 0.0386 0.0325 0.0359
14:01-15:00, Wed., 17 Jul. 0.0359 0.0320 0.0336
13:01-14:00, Wed., 17 Jul. 0.0353 0.0318 0.0335