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
04:01-05:00, Sun., 27 Jul. 0.0401 0.0336 0.0366
03:01-04:00, Sun., 27 Jul. 0.0391 0.0336 0.0361
02:01-03:00, Sun., 27 Jul. 0.0379 0.0339 0.0359
01:01-02:00, Sun., 27 Jul. 0.0388 0.0331 0.0363
00:01-01:00, Sun., 27 Jul. 0.0393 0.0341 0.0363
23:01-24:00, Sat., 26 Jul. 0.0383 0.0333 0.0356
22:01-23:00, Sat., 26 Jul. 0.0374 0.0318 0.0351
21:01-22:00, Sat., 26 Jul. 0.0370 0.0325 0.0349
20:01-21:00, Sat., 26 Jul. 0.0374 0.0321 0.0346
19:01-20:00, Sat., 26 Jul. 0.0369 0.0311 0.0344
18:01-19:00, Sat., 26 Jul. 0.0374 0.0322 0.0344
17:01-18:00, Sat., 26 Jul. 0.0370 0.0310 0.0345
16:01-17:00, Sat., 26 Jul. 0.0367 0.0321 0.0346
15:01-16:00, Sat., 26 Jul. 0.0371 0.0322 0.0347
14:01-15:00, Sat., 26 Jul. 0.0370 0.0315 0.0342
13:01-14:00, Sat., 26 Jul. 0.0367 0.0318 0.0343
12:01-13:00, Sat., 26 Jul. 0.0365 0.0322 0.0342
11:01-12:00, Sat., 26 Jul. 0.0373 0.0326 0.0346
10:01-11:00, Sat., 26 Jul. 0.0377 0.0329 0.0350
09:01-10:00, Sat., 26 Jul. 0.0374 0.0329 0.0354
08:01-09:00, Sat., 26 Jul. 0.0381 0.0329 0.0355
07:01-08:00, Sat., 26 Jul. 0.0402 0.0343 0.0365
06:01-07:00, Sat., 26 Jul. 0.0395 0.0341 0.0369
05:01-06:00, Sat., 26 Jul. 0.0397 0.0338 0.0373
04:01-05:00, Sat., 26 Jul. 0.0398 0.0348 0.0372
03:01-04:00, Sat., 26 Jul. 0.0396 0.0353 0.0376
02:01-03:00, Sat., 26 Jul. 0.0391 0.0348 0.0367
01:01-02:00, Sat., 26 Jul. 0.0387 0.0336 0.0363
00:01-01:00, Sat., 26 Jul. 0.0388 0.0336 0.0360
23:01-24:00, Fri., 25 Jul. 0.0384 0.0332 0.0359
22:01-23:00, Fri., 25 Jul. 0.0376 0.0337 0.0356
21:01-22:00, Fri., 25 Jul. 0.0371 0.0325 0.0355
20:01-21:00, Fri., 25 Jul. 0.0377 0.0313 0.0346
19:01-20:00, Fri., 25 Jul. 0.0369 0.0323 0.0346
18:01-19:00, Fri., 25 Jul. 0.0369 0.0316 0.0344
17:01-18:00, Fri., 25 Jul. 0.0360 0.0311 0.0343
16:01-17:00, Fri., 25 Jul. 0.0370 0.0325 0.0343
15:01-16:00, Fri., 25 Jul. 0.0362 0.0322 0.0343
14:01-15:00, Fri., 25 Jul. 0.0365 0.0320 0.0341
13:01-14:00, Fri., 25 Jul. 0.0367 0.0325 0.0343
12:01-13:00, Fri., 25 Jul. 0.0367 0.0322 0.0343
11:01-12:00, Fri., 25 Jul. 0.0361 0.0325 0.0343
10:01-11:00, Fri., 25 Jul. 0.0371 0.0322 0.0349
09:01-10:00, Fri., 25 Jul. 0.0379 0.0317 0.0353
08:01-09:00, Fri., 25 Jul. 0.0377 0.0326 0.0352
07:01-08:00, Fri., 25 Jul. 0.0374 0.0329 0.0355
06:01-07:00, Fri., 25 Jul. 0.0381 0.0340 0.0362
05:01-06:00, Fri., 25 Jul. 0.0395 0.0348 0.0370
04:01-05:00, Fri., 25 Jul. 0.0403 0.0346 0.0371
03:01-04:00, Fri., 25 Jul. 0.0390 0.0343 0.0368
02:01-03:00, Fri., 25 Jul. 0.0395 0.0347 0.0372
01:01-02:00, Fri., 25 Jul. 0.0395 0.0343 0.0371
00:01-01:00, Fri., 25 Jul. 0.0391 0.0332 0.0364
23:01-24:00, Thu., 24 Jul. 0.0381 0.0330 0.0355
22:01-23:00, Thu., 24 Jul. 0.0370 0.0325 0.0349
21:01-22:00, Thu., 24 Jul. 0.0370 0.0325 0.0348
20:01-21:00, Thu., 24 Jul. 0.0370 0.0318 0.0343
19:01-20:00, Thu., 24 Jul. 0.0371 0.0323 0.0343
18:01-19:00, Thu., 24 Jul. 0.0357 0.0318 0.0340
17:01-18:00, Thu., 24 Jul. 0.0360 0.0323 0.0339
16:01-17:00, Thu., 24 Jul. 0.0371 0.0315 0.0342
15:01-16:00, Thu., 24 Jul. 0.0372 0.0317 0.0343
14:01-15:00, Thu., 24 Jul. 0.0374 0.0316 0.0344
13:01-14:00, Thu., 24 Jul. 0.0377 0.0322 0.0345
12:01-13:00, Thu., 24 Jul. 0.0363 0.0325 0.0346
11:01-12:00, Thu., 24 Jul. 0.0368 0.0325 0.0351
10:01-11:00, Thu., 24 Jul. 0.0382 0.0333 0.0359
09:01-10:00, Thu., 24 Jul. 0.0398 0.0341 0.0358
08:01-09:00, Thu., 24 Jul. 0.0384 0.0337 0.0363
07:01-08:00, Thu., 24 Jul. 0.0394 0.0341 0.0366
06:01-07:00, Thu., 24 Jul. 0.0405 0.0350 0.0372
05:01-06:00, Thu., 24 Jul. 0.0392 0.0347 0.0372
04:01-05:00, Thu., 24 Jul. 0.0405 0.0349 0.0378
03:01-04:00, Thu., 24 Jul. 0.0401 0.0353 0.0375
02:01-03:00, Thu., 24 Jul. 0.0399 0.0341 0.0365
01:01-02:00, Thu., 24 Jul. 0.0389 0.0327 0.0359
00:01-01:00, Thu., 24 Jul. 0.0373 0.0318 0.0348
23:01-24:00, Wed., 23 Jul. 0.0367 0.0318 0.0344
22:01-23:00, Wed., 23 Jul. 0.0369 0.0320 0.0340
21:01-22:00, Wed., 23 Jul. 0.0377 0.0325 0.0344
20:01-21:00, Wed., 23 Jul. 0.0363 0.0325 0.0343
19:01-20:00, Wed., 23 Jul. 0.0363 0.0309 0.0339
18:01-19:00, Wed., 23 Jul. 0.0357 0.0311 0.0338
17:01-18:00, Wed., 23 Jul. 0.0363 0.0309 0.0338
16:01-17:00, Wed., 23 Jul. 0.0358 0.0323 0.0341
15:01-16:00, Wed., 23 Jul. 0.0362 0.0318 0.0341
14:01-15:00, Wed., 23 Jul. 0.0375 0.0315 0.0344
13:01-14:00, Wed., 23 Jul. 0.0358 0.0313 0.0340
12:01-13:00, Wed., 23 Jul. 0.0362 0.0319 0.0344
11:01-12:00, Wed., 23 Jul. 0.0390 0.0325 0.0356
10:01-11:00, Wed., 23 Jul. 0.0388 0.0333 0.0362
09:01-10:00, Wed., 23 Jul. 0.0388 0.0336 0.0363
08:01-09:00, Wed., 23 Jul. 0.0396 0.0349 0.0369
07:01-08:00, Wed., 23 Jul. 0.0394 0.0350 0.0373
06:01-07:00, Wed., 23 Jul. 0.0408 0.0355 0.0379
05:01-06:00, Wed., 23 Jul. 0.0402 0.0354 0.0377
04:01-05:00, Wed., 23 Jul. 0.0395 0.0337 0.0367
03:01-04:00, Wed., 23 Jul. 0.0380 0.0329 0.0356
02:01-03:00, Wed., 23 Jul. 0.0382 0.0338 0.0357
01:01-02:00, Wed., 23 Jul. 0.0371 0.0331 0.0350
00:01-01:00, Wed., 23 Jul. 0.0385 0.0323 0.0356
23:01-24:00, Tue., 22 Jul. 0.0375 0.0326 0.0357
22:01-23:00, Tue., 22 Jul. 0.0372 0.0323 0.0348
21:01-22:00, Tue., 22 Jul. 0.0368 0.0316 0.0339
20:01-21:00, Tue., 22 Jul. 0.0365 0.0317 0.0340
19:01-20:00, Tue., 22 Jul. 0.0361 0.0316 0.0338
18:01-19:00, Tue., 22 Jul. 0.0358 0.0318 0.0338
17:01-18:00, Tue., 22 Jul. 0.0361 0.0314 0.0334
16:01-17:00, Tue., 22 Jul. 0.0354 0.0308 0.0336
15:01-16:00, Tue., 22 Jul. 0.0359 0.0308 0.0339
14:01-15:00, Tue., 22 Jul. 0.0363 0.0322 0.0340
13:01-14:00, Tue., 22 Jul. 0.0370 0.0318 0.0342
12:01-13:00, Tue., 22 Jul. 0.0374 0.0316 0.0343
11:01-12:00, Tue., 22 Jul. 0.0365 0.0325 0.0343
10:01-11:00, Tue., 22 Jul. 0.0367 0.0322 0.0346
09:01-10:00, Tue., 22 Jul. 0.0367 0.0325 0.0349
08:01-09:00, Tue., 22 Jul. 0.0381 0.0325 0.0352
07:01-08:00, Tue., 22 Jul. 0.0383 0.0341 0.0363
06:01-07:00, Tue., 22 Jul. 0.0398 0.0348 0.0370
05:01-06:00, Tue., 22 Jul. 0.0377 0.0327 0.0354
04:01-05:00, Tue., 22 Jul. 0.0383 0.0320 0.0347
03:01-04:00, Tue., 22 Jul. 0.0377 0.0326 0.0346
02:01-03:00, Tue., 22 Jul. 0.0365 0.0323 0.0344
01:01-02:00, Tue., 22 Jul. 0.0377 0.0325 0.0343
00:01-01:00, Tue., 22 Jul. 0.0367 0.0314 0.0340
23:01-24:00, Mon., 21 Jul. 0.0372 0.0318 0.0341
22:01-23:00, Mon., 21 Jul. 0.0373 0.0313 0.0340
21:01-22:00, Mon., 21 Jul. 0.0357 0.0308 0.0336
20:01-21:00, Mon., 21 Jul. 0.0360 0.0315 0.0336
19:01-20:00, Mon., 21 Jul. 0.0353 0.0310 0.0334
18:01-19:00, Mon., 21 Jul. 0.0367 0.0312 0.0334
17:01-18:00, Mon., 21 Jul. 0.0356 0.0309 0.0337
16:01-17:00, Mon., 21 Jul. 0.0354 0.0311 0.0336
15:01-16:00, Mon., 21 Jul. 0.0373 0.0313 0.0337
14:01-15:00, Mon., 21 Jul. 0.0380 0.0315 0.0339
13:01-14:00, Mon., 21 Jul. 0.0357 0.0313 0.0334
12:01-13:00, Mon., 21 Jul. 0.0355 0.0321 0.0336
11:01-12:00, Mon., 21 Jul. 0.0366 0.0314 0.0339
10:01-11:00, Mon., 21 Jul. 0.0368 0.0318 0.0343
09:01-10:00, Mon., 21 Jul. 0.0379 0.0322 0.0348
08:01-09:00, Mon., 21 Jul. 0.0373 0.0328 0.0354
07:01-08:00, Mon., 21 Jul. 0.0395 0.0337 0.0363
06:01-07:00, Mon., 21 Jul. 0.0396 0.0346 0.0371
05:01-06:00, Mon., 21 Jul. 0.0396 0.0349 0.0368
04:01-05:00, Mon., 21 Jul. 0.0383 0.0339 0.0365
03:01-04:00, Mon., 21 Jul. 0.0377 0.0335 0.0360
02:01-03:00, Mon., 21 Jul. 0.0380 0.0328 0.0355
01:01-02:00, Mon., 21 Jul. 0.0377 0.0325 0.0349
00:01-01:00, Mon., 21 Jul. 0.0363 0.0304 0.0339
23:01-24:00, Sun., 20 Jul. 0.0353 0.0313 0.0339
22:01-23:00, Sun., 20 Jul. 0.0367 0.0317 0.0340
21:01-22:00, Sun., 20 Jul. 0.0364 0.0309 0.0335
20:01-21:00, Sun., 20 Jul. 0.0356 0.0303 0.0335
19:01-20:00, Sun., 20 Jul. 0.0357 0.0314 0.0334
18:01-19:00, Sun., 20 Jul. 0.0355 0.0313 0.0333
17:01-18:00, Sun., 20 Jul. 0.0360 0.0315 0.0337
16:01-17:00, Sun., 20 Jul. 0.0370 0.0317 0.0338
15:01-16:00, Sun., 20 Jul. 0.0361 0.0309 0.0336
14:01-15:00, Sun., 20 Jul. 0.0352 0.0307 0.0335
13:01-14:00, Sun., 20 Jul. 0.0353 0.0314 0.0334
12:01-13:00, Sun., 20 Jul. 0.0352 0.0313 0.0333
11:01-12:00, Sun., 20 Jul. 0.0359 0.0300 0.0334
10:01-11:00, Sun., 20 Jul. 0.0360 0.0305 0.0333
09:01-10:00, Sun., 20 Jul. 0.0358 0.0317 0.0337
08:01-09:00, Sun., 20 Jul. 0.0364 0.0315 0.0339
07:01-08:00, Sun., 20 Jul. 0.0376 0.0329 0.0349
06:01-07:00, Sun., 20 Jul. 0.0378 0.0331 0.0353
05:01-06:00, Sun., 20 Jul. 0.0386 0.0327 0.0352
04:01-05:00, Sun., 20 Jul. 0.0373 0.0319 0.0351
03:01-04:00, Sun., 20 Jul. 0.0372 0.0327 0.0347
02:01-03:00, Sun., 20 Jul. 0.0361 0.0316 0.0338
01:01-02:00, Sun., 20 Jul. 0.0356 0.0310 0.0339
00:01-01:00, Sun., 20 Jul. 0.0361 0.0316 0.0338
23:01-24:00, Sat., 19 Jul. 0.0370 0.0317 0.0336
22:01-23:00, Sat., 19 Jul. 0.0352 0.0318 0.0335
21:01-22:00, Sat., 19 Jul. 0.0356 0.0315 0.0335
20:01-21:00, Sat., 19 Jul. 0.0355 0.0311 0.0331
19:01-20:00, Sat., 19 Jul. 0.0357 0.0315 0.0333
18:01-19:00, Sat., 19 Jul. 0.0360 0.0316 0.0336
17:01-18:00, Sat., 19 Jul. 0.0360 0.0305 0.0331
16:01-17:00, Sat., 19 Jul. 0.0354 0.0298 0.0334
15:01-16:00, Sat., 19 Jul. 0.0358 0.0311 0.0331
14:01-15:00, Sat., 19 Jul. 0.0354 0.0308 0.0329
13:01-14:00, Sat., 19 Jul. 0.0353 0.0311 0.0330
12:01-13:00, Sat., 19 Jul. 0.0348 0.0306 0.0329
11:01-12:00, Sat., 19 Jul. 0.0353 0.0305 0.0328
10:01-11:00, Sat., 19 Jul. 0.0345 0.0311 0.0329
09:01-10:00, Sat., 19 Jul. 0.0367 0.0305 0.0334
08:01-09:00, Sat., 19 Jul. 0.0368 0.0311 0.0339
07:01-08:00, Sat., 19 Jul. 0.0371 0.0325 0.0349
06:01-07:00, Sat., 19 Jul. 0.0371 0.0321 0.0347
05:01-06:00, Sat., 19 Jul. 0.0369 0.0313 0.0343
04:01-05:00, Sat., 19 Jul. 0.0363 0.0322 0.0345
03:01-04:00, Sat., 19 Jul. 0.0370 0.0312 0.0343
02:01-03:00, Sat., 19 Jul. 0.0365 0.0315 0.0340
01:01-02:00, Sat., 19 Jul. 0.0360 0.0315 0.0337
00:01-01:00, Sat., 19 Jul. 0.0366 0.0308 0.0334
23:01-24:00, Fri., 18 Jul. 0.0361 0.0311 0.0332
22:01-23:00, Fri., 18 Jul. 0.0352 0.0311 0.0333
21:01-22:00, Fri., 18 Jul. 0.0355 0.0304 0.0331
20:01-21:00, Fri., 18 Jul. 0.0356 0.0311 0.0333
19:01-20:00, Fri., 18 Jul. 0.0356 0.0309 0.0330
18:01-19:00, Fri., 18 Jul. 0.0353 0.0306 0.0328
17:01-18:00, Fri., 18 Jul. 0.0360 0.0305 0.0327
16:01-17:00, Fri., 18 Jul. 0.0352 0.0315 0.0330
15:01-16:00, Fri., 18 Jul. 0.0360 0.0307 0.0330
14:01-15:00, Fri., 18 Jul. 0.0356 0.0310 0.0329
13:01-14:00, Fri., 18 Jul. 0.0349 0.0307 0.0329
12:01-13:00, Fri., 18 Jul. 0.0356 0.0306 0.0326
11:01-12:00, Fri., 18 Jul. 0.0363 0.0308 0.0328
10:01-11:00, Fri., 18 Jul. 0.0351 0.0304 0.0328
09:01-10:00, Fri., 18 Jul. 0.0347 0.0296 0.0328
08:01-09:00, Fri., 18 Jul. 0.0356 0.0310 0.0330
07:01-08:00, Fri., 18 Jul. 0.0360 0.0308 0.0333
06:01-07:00, Fri., 18 Jul. 0.0355 0.0304 0.0333
05:01-06:00, Fri., 18 Jul. 0.0363 0.0311 0.0335
04:01-05:00, Fri., 18 Jul. 0.0353 0.0309 0.0332
03:01-04:00, Fri., 18 Jul. 0.0363 0.0305 0.0330
02:01-03:00, Fri., 18 Jul. 0.0348 0.0304 0.0332
01:01-02:00, Fri., 18 Jul. 0.0345 0.0315 0.0329
00:01-01:00, Fri., 18 Jul. 0.0353 0.0304 0.0331
23:01-24:00, Thu., 17 Jul. 0.0361 0.0297 0.0326
22:01-23:00, Thu., 17 Jul. 0.0353 0.0305 0.0328
21:01-22:00, Thu., 17 Jul. 0.0367 0.0305 0.0330
20:01-21:00, Thu., 17 Jul. 0.0354 0.0307 0.0329
19:01-20:00, Thu., 17 Jul. 0.0350 0.0306 0.0329
18:01-19:00, Thu., 17 Jul. 0.0348 0.0299 0.0326
17:01-18:00, Thu., 17 Jul. 0.0346 0.0302 0.0328
16:01-17:00, Thu., 17 Jul. 0.0347 0.0295 0.0328
15:01-16:00, Thu., 17 Jul. 0.0353 0.0304 0.0328
14:01-15:00, Thu., 17 Jul. 0.0355 0.0308 0.0328
13:01-14:00, Thu., 17 Jul. 0.0353 0.0301 0.0324
12:01-13:00, Thu., 17 Jul. 0.0349 0.0300 0.0325
11:01-12:00, Thu., 17 Jul. 0.0349 0.0300 0.0325
10:01-11:00, Thu., 17 Jul. 0.0347 0.0301 0.0328
09:01-10:00, Thu., 17 Jul. 0.0349 0.0302 0.0322
08:01-09:00, Thu., 17 Jul. 0.0347 0.0306 0.0324
07:01-08:00, Thu., 17 Jul. 0.0353 0.0306 0.0328
06:01-07:00, Thu., 17 Jul. 0.0344 0.0298 0.0325
05:01-06:00, Thu., 17 Jul. 0.0349 0.0303 0.0327