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
15:01-16:00, Sat., 17 Oct. 0.0363 0.0309 0.0342
14:01-15:00, Sat., 17 Oct. 0.0374 0.0321 0.0343
13:01-14:00, Sat., 17 Oct. 0.0371 0.0323 0.0344
12:01-13:00, Sat., 17 Oct. 0.0372 0.0322 0.0343
11:01-12:00, Sat., 17 Oct. 0.0364 0.0313 0.0341
10:01-11:00, Sat., 17 Oct. 0.0370 0.0322 0.0346
09:01-10:00, Sat., 17 Oct. 0.0362 0.0325 0.0341
08:01-09:00, Sat., 17 Oct. 0.0364 0.0317 0.0344
07:01-08:00, Sat., 17 Oct. 0.0360 0.0326 0.0345
06:01-07:00, Sat., 17 Oct. 0.0363 0.0310 0.0340
05:01-06:00, Sat., 17 Oct. 0.0372 0.0325 0.0345
04:01-05:00, Sat., 17 Oct. 0.0371 0.0317 0.0350
03:01-04:00, Sat., 17 Oct. 0.0370 0.0322 0.0349
02:01-03:00, Sat., 17 Oct. 0.0395 0.0322 0.0348
01:01-02:00, Sat., 17 Oct. 0.0370 0.0327 0.0345
00:01-01:00, Sat., 17 Oct. 0.0376 0.0322 0.0344
23:01-24:00, Fri., 16 Oct. 0.0374 0.0329 0.0352
22:01-23:00, Fri., 16 Oct. 0.0378 0.0326 0.0352
21:01-22:00, Fri., 16 Oct. 0.0377 0.0320 0.0349
20:01-21:00, Fri., 16 Oct. 0.0366 0.0315 0.0343
19:01-20:00, Fri., 16 Oct. 0.0380 0.0321 0.0341
18:01-19:00, Fri., 16 Oct. 0.0378 0.0316 0.0338
17:01-18:00, Fri., 16 Oct. 0.0356 0.0318 0.0338
16:01-17:00, Fri., 16 Oct. 0.0370 0.0312 0.0341
15:01-16:00, Fri., 16 Oct. 0.0370 0.0318 0.0343
14:01-15:00, Fri., 16 Oct. 0.0364 0.0305 0.0342
13:01-14:00, Fri., 16 Oct. 0.0367 0.0320 0.0340
12:01-13:00, Fri., 16 Oct. 0.0363 0.0315 0.0342
11:01-12:00, Fri., 16 Oct. 0.0367 0.0318 0.0343
10:01-11:00, Fri., 16 Oct. 0.0363 0.0311 0.0341
09:01-10:00, Fri., 16 Oct. 0.0376 0.0314 0.0344
08:01-09:00, Fri., 16 Oct. 0.0375 0.0323 0.0346
07:01-08:00, Fri., 16 Oct. 0.0386 0.0317 0.0350
06:01-07:00, Fri., 16 Oct. 0.0370 0.0330 0.0351
05:01-06:00, Fri., 16 Oct. 0.0374 0.0329 0.0351
04:01-05:00, Fri., 16 Oct. 0.0371 0.0314 0.0344
03:01-04:00, Fri., 16 Oct. 0.0369 0.0311 0.0339
02:01-03:00, Fri., 16 Oct. 0.0360 0.0313 0.0336
01:01-02:00, Fri., 16 Oct. 0.0363 0.0321 0.0342
00:01-01:00, Fri., 16 Oct. 0.0375 0.0317 0.0344
23:01-24:00, Thu., 15 Oct. 0.0359 0.0320 0.0339
22:01-23:00, Thu., 15 Oct. 0.0356 0.0316 0.0337
21:01-22:00, Thu., 15 Oct. 0.0361 0.0313 0.0338
20:01-21:00, Thu., 15 Oct. 0.0368 0.0311 0.0339
19:01-20:00, Thu., 15 Oct. 0.0361 0.0312 0.0336
18:01-19:00, Thu., 15 Oct. 0.0360 0.0318 0.0339
17:01-18:00, Thu., 15 Oct. 0.0364 0.0312 0.0337
16:01-17:00, Thu., 15 Oct. 0.0360 0.0321 0.0336
15:01-16:00, Thu., 15 Oct. 0.0362 0.0316 0.0337
14:01-15:00, Thu., 15 Oct. 0.0359 0.0315 0.0339
13:01-14:00, Thu., 15 Oct. 0.0362 0.0312 0.0340
12:01-13:00, Thu., 15 Oct. 0.0364 0.0322 0.0341
11:01-12:00, Thu., 15 Oct. 0.0361 0.0311 0.0340
10:01-11:00, Thu., 15 Oct. 0.0370 0.0320 0.0345
09:01-10:00, Thu., 15 Oct. 0.0366 0.0317 0.0340
08:01-09:00, Thu., 15 Oct. 0.0363 0.0307 0.0339
07:01-08:00, Thu., 15 Oct. 0.0364 0.0317 0.0339
06:01-07:00, Thu., 15 Oct. 0.0369 0.0314 0.0342
05:01-06:00, Thu., 15 Oct. 0.0364 0.0320 0.0343
04:01-05:00, Thu., 15 Oct. 0.0367 0.0321 0.0342
03:01-04:00, Thu., 15 Oct. 0.0370 0.0319 0.0345
02:01-03:00, Thu., 15 Oct. 0.0363 0.0317 0.0343
01:01-02:00, Thu., 15 Oct. 0.0366 0.0321 0.0344
00:01-01:00, Thu., 15 Oct. 0.0366 0.0315 0.0343
23:01-24:00, Wed., 14 Oct. 0.0363 0.0318 0.0344
22:01-23:00, Wed., 14 Oct. 0.0371 0.0329 0.0350
21:01-22:00, Wed., 14 Oct. 0.0377 0.0320 0.0348
20:01-21:00, Wed., 14 Oct. 0.0370 0.0325 0.0348
19:01-20:00, Wed., 14 Oct. 0.0368 0.0316 0.0343
18:01-19:00, Wed., 14 Oct. 0.0371 0.0322 0.0344
17:01-18:00, Wed., 14 Oct. 0.0360 0.0313 0.0339
16:01-17:00, Wed., 14 Oct. 0.0360 0.0317 0.0334
15:01-16:00, Wed., 14 Oct. 0.0370 0.0319 0.0340
14:01-15:00, Wed., 14 Oct. 0.0370 0.0322 0.0339
13:01-14:00, Wed., 14 Oct. 0.0363 0.0318 0.0342
12:01-13:00, Wed., 14 Oct. 0.0374 0.0315 0.0340
11:01-12:00, Wed., 14 Oct. 0.0374 0.0319 0.0343
10:01-11:00, Wed., 14 Oct. 0.0373 0.0317 0.0342
09:01-10:00, Wed., 14 Oct. 0.0361 0.0316 0.0339
08:01-09:00, Wed., 14 Oct. 0.0368 0.0312 0.0339
07:01-08:00, Wed., 14 Oct. 0.0370 0.0319 0.0343
06:01-07:00, Wed., 14 Oct. 0.0365 0.0317 0.0343
05:01-06:00, Wed., 14 Oct. 0.0369 0.0320 0.0341
04:01-05:00, Wed., 14 Oct. 0.0361 0.0311 0.0343
03:01-04:00, Wed., 14 Oct. 0.0363 0.0322 0.0342
02:01-03:00, Wed., 14 Oct. 0.0366 0.0322 0.0341
01:01-02:00, Wed., 14 Oct. 0.0361 0.0308 0.0340
00:01-01:00, Wed., 14 Oct. 0.0374 0.0321 0.0342
23:01-24:00, Tue., 13 Oct. 0.0361 0.0322 0.0342
22:01-23:00, Tue., 13 Oct. 0.0363 0.0322 0.0339
21:01-22:00, Tue., 13 Oct. 0.0365 0.0317 0.0336
20:01-21:00, Tue., 13 Oct. 0.0357 0.0315 0.0334
19:01-20:00, Tue., 13 Oct. 0.0359 0.0301 0.0330
18:01-19:00, Tue., 13 Oct. 0.0356 0.0307 0.0331
17:01-18:00, Tue., 13 Oct. 0.0356 0.0309 0.0333
16:01-17:00, Tue., 13 Oct. 0.0353 0.0308 0.0332
15:01-16:00, Tue., 13 Oct. 0.0353 0.0315 0.0335
14:01-15:00, Tue., 13 Oct. 0.0360 0.0316 0.0336
13:01-14:00, Tue., 13 Oct. 0.0360 0.0311 0.0335
12:01-13:00, Tue., 13 Oct. 0.0355 0.0311 0.0335
11:01-12:00, Tue., 13 Oct. 0.0365 0.0314 0.0337
10:01-11:00, Tue., 13 Oct. 0.0353 0.0316 0.0334
09:01-10:00, Tue., 13 Oct. 0.0367 0.0318 0.0338
08:01-09:00, Tue., 13 Oct. 0.0360 0.0315 0.0340
07:01-08:00, Tue., 13 Oct. 0.0370 0.0322 0.0344
06:01-07:00, Tue., 13 Oct. 0.0362 0.0315 0.0338
05:01-06:00, Tue., 13 Oct. 0.0356 0.0311 0.0339
04:01-05:00, Tue., 13 Oct. 0.0365 0.0322 0.0337
03:01-04:00, Tue., 13 Oct. 0.0368 0.0313 0.0337
02:01-03:00, Tue., 13 Oct. 0.0357 0.0319 0.0337
01:01-02:00, Tue., 13 Oct. 0.0370 0.0317 0.0338
00:01-01:00, Tue., 13 Oct. 0.0356 0.0313 0.0337
23:01-24:00, Mon., 12 Oct. 0.0363 0.0308 0.0339
22:01-23:00, Mon., 12 Oct. 0.0352 0.0297 0.0332
21:01-22:00, Mon., 12 Oct. 0.0367 0.0315 0.0337
20:01-21:00, Mon., 12 Oct. 0.0356 0.0313 0.0333
19:01-20:00, Mon., 12 Oct. 0.0362 0.0307 0.0336
18:01-19:00, Mon., 12 Oct. 0.0361 0.0310 0.0336
17:01-18:00, Mon., 12 Oct. 0.0362 0.0315 0.0338
16:01-17:00, Mon., 12 Oct. 0.0364 0.0311 0.0337
15:01-16:00, Mon., 12 Oct. 0.0362 0.0313 0.0340
14:01-15:00, Mon., 12 Oct. 0.0364 0.0320 0.0341
13:01-14:00, Mon., 12 Oct. 0.0364 0.0320 0.0344
12:01-13:00, Mon., 12 Oct. 0.0370 0.0311 0.0344
11:01-12:00, Mon., 12 Oct. 0.0370 0.0316 0.0340
10:01-11:00, Mon., 12 Oct. 0.0366 0.0321 0.0344
09:01-10:00, Mon., 12 Oct. 0.0363 0.0322 0.0344
08:01-09:00, Mon., 12 Oct. 0.0362 0.0311 0.0342
07:01-08:00, Mon., 12 Oct. 0.0370 0.0330 0.0346
06:01-07:00, Mon., 12 Oct. 0.0370 0.0321 0.0345
05:01-06:00, Mon., 12 Oct. 0.0370 0.0322 0.0341
04:01-05:00, Mon., 12 Oct. 0.0367 0.0320 0.0342
03:01-04:00, Mon., 12 Oct. 0.0374 0.0328 0.0344
02:01-03:00, Mon., 12 Oct. 0.0370 0.0322 0.0344
01:01-02:00, Mon., 12 Oct. 0.0363 0.0320 0.0341
00:01-01:00, Mon., 12 Oct. 0.0361 0.0320 0.0338
23:01-24:00, Sun., 11 Oct. 0.0371 0.0318 0.0344
22:01-23:00, Sun., 11 Oct. 0.0363 0.0318 0.0342
21:01-22:00, Sun., 11 Oct. 0.0361 0.0322 0.0341
20:01-21:00, Sun., 11 Oct. 0.0360 0.0315 0.0337
19:01-20:00, Sun., 11 Oct. 0.0356 0.0311 0.0337
18:01-19:00, Sun., 11 Oct. 0.0364 0.0313 0.0337
17:01-18:00, Sun., 11 Oct. 0.0359 0.0312 0.0336
16:01-17:00, Sun., 11 Oct. 0.0363 0.0324 0.0339
15:01-16:00, Sun., 11 Oct. 0.0363 0.0322 0.0339
14:01-15:00, Sun., 11 Oct. 0.0369 0.0318 0.0338
13:01-14:00, Sun., 11 Oct. 0.0360 0.0313 0.0339
12:01-13:00, Sun., 11 Oct. 0.0367 0.0319 0.0341
11:01-12:00, Sun., 11 Oct. 0.0365 0.0312 0.0338
10:01-11:00, Sun., 11 Oct. 0.0369 0.0324 0.0347
09:01-10:00, Sun., 11 Oct. 0.0365 0.0319 0.0344
08:01-09:00, Sun., 11 Oct. 0.0363 0.0319 0.0346
07:01-08:00, Sun., 11 Oct. 0.0372 0.0323 0.0342
06:01-07:00, Sun., 11 Oct. 0.0374 0.0315 0.0342
05:01-06:00, Sun., 11 Oct. 0.0358 0.0312 0.0338
04:01-05:00, Sun., 11 Oct. 0.0363 0.0313 0.0335
03:01-04:00, Sun., 11 Oct. 0.0359 0.0308 0.0336
02:01-03:00, Sun., 11 Oct. 0.0350 0.0311 0.0334
01:01-02:00, Sun., 11 Oct. 0.0367 0.0305 0.0336
00:01-01:00, Sun., 11 Oct. 0.0363 0.0321 0.0341
23:01-24:00, Sat., 10 Oct. 0.0363 0.0316 0.0339
22:01-23:00, Sat., 10 Oct. 0.0372 0.0311 0.0336
21:01-22:00, Sat., 10 Oct. 0.0356 0.0304 0.0338
20:01-21:00, Sat., 10 Oct. 0.0363 0.0322 0.0341
19:01-20:00, Sat., 10 Oct. 0.0364 0.0318 0.0339
18:01-19:00, Sat., 10 Oct. 0.0354 0.0318 0.0335
17:01-18:00, Sat., 10 Oct. 0.0366 0.0310 0.0333
16:01-17:00, Sat., 10 Oct. 0.0357 0.0315 0.0334
15:01-16:00, Sat., 10 Oct. 0.0360 0.0320 0.0334
14:01-15:00, Sat., 10 Oct. 0.0359 0.0306 0.0336
13:01-14:00, Sat., 10 Oct. 0.0356 0.0313 0.0334
12:01-13:00, Sat., 10 Oct. 0.0365 0.0315 0.0336
11:01-12:00, Sat., 10 Oct. 0.0361 0.0305 0.0334
10:01-11:00, Sat., 10 Oct. 0.0363 0.0318 0.0336
09:01-10:00, Sat., 10 Oct. 0.0359 0.0315 0.0340
08:01-09:00, Sat., 10 Oct. 0.0376 0.0314 0.0340
07:01-08:00, Sat., 10 Oct. 0.0360 0.0308 0.0336
06:01-07:00, Sat., 10 Oct. 0.0360 0.0311 0.0333
05:01-06:00, Sat., 10 Oct. 0.0353 0.0308 0.0334
04:01-05:00, Sat., 10 Oct. 0.0360 0.0311 0.0332
03:01-04:00, Sat., 10 Oct. 0.0362 0.0304 0.0336
02:01-03:00, Sat., 10 Oct. 0.0361 0.0312 0.0335
01:01-02:00, Sat., 10 Oct. 0.0378 0.0323 0.0340
00:01-01:00, Sat., 10 Oct. 0.0358 0.0314 0.0336
23:01-24:00, Fri., 09 Oct. 0.0359 0.0313 0.0337
22:01-23:00, Fri., 09 Oct. 0.0350 0.0308 0.0332
21:01-22:00, Fri., 09 Oct. 0.0353 0.0306 0.0332
20:01-21:00, Fri., 09 Oct. 0.0356 0.0308 0.0332
19:01-20:00, Fri., 09 Oct. 0.0359 0.0309 0.0332
18:01-19:00, Fri., 09 Oct. 0.0363 0.0311 0.0334
17:01-18:00, Fri., 09 Oct. 0.0366 0.0304 0.0334
16:01-17:00, Fri., 09 Oct. 0.0349 0.0304 0.0329
15:01-16:00, Fri., 09 Oct. 0.0355 0.0312 0.0334
14:01-15:00, Fri., 09 Oct. 0.0357 0.0311 0.0335
13:01-14:00, Fri., 09 Oct. 0.0363 0.0308 0.0334
12:01-13:00, Fri., 09 Oct. 0.0360 0.0311 0.0337
11:01-12:00, Fri., 09 Oct. 0.0363 0.0309 0.0336
10:01-11:00, Fri., 09 Oct. 0.0363 0.0320 0.0339
09:01-10:00, Fri., 09 Oct. 0.0359 0.0316 0.0339
08:01-09:00, Fri., 09 Oct. 0.0366 0.0313 0.0340
07:01-08:00, Fri., 09 Oct. 0.0366 0.0325 0.0341
06:01-07:00, Fri., 09 Oct. 0.0377 0.0310 0.0340
05:01-06:00, Fri., 09 Oct. 0.0362 0.0311 0.0339
04:01-05:00, Fri., 09 Oct. 0.0361 0.0321 0.0341
03:01-04:00, Fri., 09 Oct. 0.0370 0.0313 0.0340
02:01-03:00, Fri., 09 Oct. 0.0367 0.0319 0.0339
01:01-02:00, Fri., 09 Oct. 0.0358 0.0313 0.0338
00:01-01:00, Fri., 09 Oct. 0.0356 0.0317 0.0339
23:01-24:00, Thu., 08 Oct. 0.0358 0.0310 0.0333
22:01-23:00, Thu., 08 Oct. 0.0354 0.0314 0.0332
21:01-22:00, Thu., 08 Oct. 0.0361 0.0301 0.0332
20:01-21:00, Thu., 08 Oct. 0.0353 0.0310 0.0331
19:01-20:00, Thu., 08 Oct. 0.0353 0.0305 0.0330
18:01-19:00, Thu., 08 Oct. 0.0356 0.0315 0.0329
17:01-18:00, Thu., 08 Oct. 0.0356 0.0308 0.0331
16:01-17:00, Thu., 08 Oct. 0.0353 0.0311 0.0329
15:01-16:00, Thu., 08 Oct. 0.0353 0.0311 0.0330
14:01-15:00, Thu., 08 Oct. 0.0356 0.0302 0.0331
13:01-14:00, Thu., 08 Oct. 0.0349 0.0314 0.0331
12:01-13:00, Thu., 08 Oct. 0.0353 0.0310 0.0331
11:01-12:00, Thu., 08 Oct. 0.0360 0.0292 0.0329
10:01-11:00, Thu., 08 Oct. 0.0355 0.0312 0.0331
09:01-10:00, Thu., 08 Oct. 0.0363 0.0310 0.0334
08:01-09:00, Thu., 08 Oct. 0.0367 0.0316 0.0341
07:01-08:00, Thu., 08 Oct. 0.0363 0.0317 0.0340
06:01-07:00, Thu., 08 Oct. 0.0363 0.0313 0.0340
05:01-06:00, Thu., 08 Oct. 0.0362 0.0309 0.0338
04:01-05:00, Thu., 08 Oct. 0.0363 0.0312 0.0335
03:01-04:00, Thu., 08 Oct. 0.0360 0.0322 0.0341
02:01-03:00, Thu., 08 Oct. 0.0355 0.0321 0.0334
01:01-02:00, Thu., 08 Oct. 0.0361 0.0311 0.0336
00:01-01:00, Thu., 08 Oct. 0.0363 0.0313 0.0337
23:01-24:00, Wed., 07 Oct. 0.0367 0.0320 0.0337
22:01-23:00, Wed., 07 Oct. 0.0367 0.0309 0.0334
21:01-22:00, Wed., 07 Oct. 0.0346 0.0304 0.0331
20:01-21:00, Wed., 07 Oct. 0.0356 0.0312 0.0333
19:01-20:00, Wed., 07 Oct. 0.0347 0.0309 0.0330
18:01-19:00, Wed., 07 Oct. 0.0354 0.0302 0.0331
17:01-18:00, Wed., 07 Oct. 0.0346 0.0308 0.0329
16:01-17:00, Wed., 07 Oct. 0.0360 0.0311 0.0331