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