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
14:01-15:00, Mon., 01 Jun. 0.0365 0.0319 0.0345
13:01-14:00, Mon., 01 Jun. 0.0365 0.0327 0.0347
12:01-13:00, Mon., 01 Jun. 0.0380 0.0329 0.0352
11:01-12:00, Mon., 01 Jun. 0.0376 0.0322 0.0351
10:01-11:00, Mon., 01 Jun. 0.0381 0.0335 0.0352
09:01-10:00, Mon., 01 Jun. 0.0377 0.0324 0.0351
08:01-09:00, Mon., 01 Jun. 0.0374 0.0336 0.0356
07:01-08:00, Mon., 01 Jun. 0.0383 0.0334 0.0356
06:01-07:00, Mon., 01 Jun. 0.0393 0.0339 0.0360
05:01-06:00, Mon., 01 Jun. 0.0386 0.0340 0.0363
04:01-05:00, Mon., 01 Jun. 0.0388 0.0346 0.0368
03:01-04:00, Mon., 01 Jun. 0.0386 0.0343 0.0363
02:01-03:00, Mon., 01 Jun. 0.0398 0.0340 0.0363
01:01-02:00, Mon., 01 Jun. 0.0386 0.0340 0.0366
00:01-01:00, Mon., 01 Jun. 0.0402 0.0336 0.0359
23:01-24:00, Sun., 31 May. 0.0375 0.0332 0.0355
22:01-23:00, Sun., 31 May. 0.0370 0.0328 0.0351
21:01-22:00, Sun., 31 May. 0.0374 0.0322 0.0348
20:01-21:00, Sun., 31 May. 0.0374 0.0327 0.0348
19:01-20:00, Sun., 31 May. 0.0377 0.0317 0.0348
18:01-19:00, Sun., 31 May. 0.0388 0.0327 0.0351
17:01-18:00, Sun., 31 May. 0.0371 0.0329 0.0349
16:01-17:00, Sun., 31 May. 0.0374 0.0327 0.0348
15:01-16:00, Sun., 31 May. 0.0365 0.0325 0.0347
14:01-15:00, Sun., 31 May. 0.0373 0.0326 0.0347
13:01-14:00, Sun., 31 May. 0.0394 0.0324 0.0349
12:01-13:00, Sun., 31 May. 0.0383 0.0339 0.0355
11:01-12:00, Sun., 31 May. 0.0382 0.0337 0.0357
10:01-11:00, Sun., 31 May. 0.0388 0.0336 0.0357
09:01-10:00, Sun., 31 May. 0.0388 0.0340 0.0368
08:01-09:00, Sun., 31 May. 0.0393 0.0349 0.0370
07:01-08:00, Sun., 31 May. 0.0398 0.0353 0.0370
06:01-07:00, Sun., 31 May. 0.0391 0.0343 0.0367
05:01-06:00, Sun., 31 May. 0.0395 0.0328 0.0362
04:01-05:00, Sun., 31 May. 0.0387 0.0345 0.0364
03:01-04:00, Sun., 31 May. 0.0387 0.0326 0.0353
02:01-03:00, Sun., 31 May. 0.0381 0.0339 0.0357
01:01-02:00, Sun., 31 May. 0.0377 0.0332 0.0356
00:01-01:00, Sun., 31 May. 0.0392 0.0332 0.0356
23:01-24:00, Sat., 30 May. 0.0383 0.0329 0.0355
22:01-23:00, Sat., 30 May. 0.0369 0.0336 0.0354
21:01-22:00, Sat., 30 May. 0.0376 0.0322 0.0347
20:01-21:00, Sat., 30 May. 0.0382 0.0318 0.0346
19:01-20:00, Sat., 30 May. 0.0373 0.0320 0.0348
18:01-19:00, Sat., 30 May. 0.0370 0.0327 0.0347
17:01-18:00, Sat., 30 May. 0.0367 0.0330 0.0346
16:01-17:00, Sat., 30 May. 0.0371 0.0317 0.0347
15:01-16:00, Sat., 30 May. 0.0375 0.0325 0.0348
14:01-15:00, Sat., 30 May. 0.0374 0.0320 0.0349
13:01-14:00, Sat., 30 May. 0.0374 0.0322 0.0346
12:01-13:00, Sat., 30 May. 0.0380 0.0322 0.0349
11:01-12:00, Sat., 30 May. 0.0379 0.0324 0.0347
10:01-11:00, Sat., 30 May. 0.0374 0.0331 0.0352
09:01-10:00, Sat., 30 May. 0.0377 0.0326 0.0349
08:01-09:00, Sat., 30 May. 0.0380 0.0327 0.0351
07:01-08:00, Sat., 30 May. 0.0383 0.0336 0.0358
06:01-07:00, Sat., 30 May. 0.0377 0.0339 0.0357
05:01-06:00, Sat., 30 May. 0.0380 0.0334 0.0357
04:01-05:00, Sat., 30 May. 0.0381 0.0323 0.0355
03:01-04:00, Sat., 30 May. 0.0376 0.0335 0.0355
02:01-03:00, Sat., 30 May. 0.0372 0.0319 0.0348
01:01-02:00, Sat., 30 May. 0.0368 0.0321 0.0346
00:01-01:00, Sat., 30 May. 0.0370 0.0318 0.0346
23:01-24:00, Fri., 29 May. 0.0368 0.0325 0.0348
22:01-23:00, Fri., 29 May. 0.0371 0.0322 0.0349
21:01-22:00, Fri., 29 May. 0.0373 0.0319 0.0347
20:01-21:00, Fri., 29 May. 0.0364 0.0330 0.0348
19:01-20:00, Fri., 29 May. 0.0375 0.0322 0.0347
18:01-19:00, Fri., 29 May. 0.0374 0.0315 0.0345
17:01-18:00, Fri., 29 May. 0.0371 0.0315 0.0344
16:01-17:00, Fri., 29 May. 0.0374 0.0322 0.0345
15:01-16:00, Fri., 29 May. 0.0365 0.0324 0.0345
14:01-15:00, Fri., 29 May. 0.0370 0.0324 0.0348
13:01-14:00, Fri., 29 May. 0.0371 0.0325 0.0349
12:01-13:00, Fri., 29 May. 0.0370 0.0324 0.0347
11:01-12:00, Fri., 29 May. 0.0377 0.0330 0.0349
10:01-11:00, Fri., 29 May. 0.0369 0.0332 0.0350
09:01-10:00, Fri., 29 May. 0.0388 0.0329 0.0360
08:01-09:00, Fri., 29 May. 0.0389 0.0342 0.0365
07:01-08:00, Fri., 29 May. 0.0387 0.0341 0.0362
06:01-07:00, Fri., 29 May. 0.0381 0.0334 0.0363
05:01-06:00, Fri., 29 May. 0.0390 0.0333 0.0362
04:01-05:00, Fri., 29 May. 0.0374 0.0340 0.0357
03:01-04:00, Fri., 29 May. 0.0373 0.0336 0.0358
02:01-03:00, Fri., 29 May. 0.0381 0.0332 0.0356
01:01-02:00, Fri., 29 May. 0.0381 0.0334 0.0351
00:01-01:00, Fri., 29 May. 0.0374 0.0315 0.0341
23:01-24:00, Thu., 28 May. 0.0371 0.0320 0.0341
22:01-23:00, Thu., 28 May. 0.0360 0.0311 0.0338
21:01-22:00, Thu., 28 May. 0.0361 0.0308 0.0339
20:01-21:00, Thu., 28 May. 0.0359 0.0323 0.0339
19:01-20:00, Thu., 28 May. 0.0369 0.0318 0.0341
18:01-19:00, Thu., 28 May. 0.0365 0.0318 0.0343
17:01-18:00, Thu., 28 May. 0.0360 0.0315 0.0340
16:01-17:00, Thu., 28 May. 0.0375 0.0315 0.0344
15:01-16:00, Thu., 28 May. 0.0365 0.0324 0.0344
14:01-15:00, Thu., 28 May. 0.0367 0.0319 0.0342
13:01-14:00, Thu., 28 May. 0.0372 0.0320 0.0341
12:01-13:00, Thu., 28 May. 0.0358 0.0318 0.0339
11:01-12:00, Thu., 28 May. 0.0359 0.0314 0.0338
10:01-11:00, Thu., 28 May. 0.0356 0.0314 0.0338
09:01-10:00, Thu., 28 May. 0.0363 0.0318 0.0339
08:01-09:00, Thu., 28 May. 0.0366 0.0315 0.0339
07:01-08:00, Thu., 28 May. 0.0368 0.0318 0.0344
06:01-07:00, Thu., 28 May. 0.0371 0.0322 0.0344
05:01-06:00, Thu., 28 May. 0.0369 0.0318 0.0338
04:01-05:00, Thu., 28 May. 0.0363 0.0314 0.0338
03:01-04:00, Thu., 28 May. 0.0370 0.0314 0.0338
02:01-03:00, Thu., 28 May. 0.0363 0.0311 0.0340
01:01-02:00, Thu., 28 May. 0.0363 0.0318 0.0339
00:01-01:00, Thu., 28 May. 0.0363 0.0305 0.0335
23:01-24:00, Wed., 27 May. 0.0361 0.0318 0.0337
22:01-23:00, Wed., 27 May. 0.0364 0.0314 0.0337
21:01-22:00, Wed., 27 May. 0.0362 0.0309 0.0336
20:01-21:00, Wed., 27 May. 0.0370 0.0316 0.0338
19:01-20:00, Wed., 27 May. 0.0357 0.0314 0.0336
18:01-19:00, Wed., 27 May. 0.0364 0.0306 0.0337
17:01-18:00, Wed., 27 May. 0.0359 0.0314 0.0338
16:01-17:00, Wed., 27 May. 0.0367 0.0305 0.0336
15:01-16:00, Wed., 27 May. 0.0363 0.0313 0.0340
14:01-15:00, Wed., 27 May. 0.0363 0.0315 0.0338
13:01-14:00, Wed., 27 May. 0.0358 0.0315 0.0337
12:01-13:00, Wed., 27 May. 0.0368 0.0313 0.0338
11:01-12:00, Wed., 27 May. 0.0366 0.0323 0.0339
10:01-11:00, Wed., 27 May. 0.0357 0.0305 0.0335
09:01-10:00, Wed., 27 May. 0.0354 0.0312 0.0337
08:01-09:00, Wed., 27 May. 0.0363 0.0311 0.0339
07:01-08:00, Wed., 27 May. 0.0373 0.0324 0.0347
06:01-07:00, Wed., 27 May. 0.0373 0.0318 0.0352
05:01-06:00, Wed., 27 May. 0.0375 0.0330 0.0354
04:01-05:00, Wed., 27 May. 0.0370 0.0324 0.0350
03:01-04:00, Wed., 27 May. 0.0374 0.0327 0.0348
02:01-03:00, Wed., 27 May. 0.0373 0.0325 0.0344
01:01-02:00, Wed., 27 May. 0.0368 0.0322 0.0341
00:01-01:00, Wed., 27 May. 0.0365 0.0302 0.0337
23:01-24:00, Tue., 26 May. 0.0359 0.0308 0.0335
22:01-23:00, Tue., 26 May. 0.0356 0.0308 0.0332
21:01-22:00, Tue., 26 May. 0.0361 0.0310 0.0335
20:01-21:00, Tue., 26 May. 0.0353 0.0311 0.0335
19:01-20:00, Tue., 26 May. 0.0350 0.0304 0.0334
18:01-19:00, Tue., 26 May. 0.0360 0.0310 0.0336
17:01-18:00, Tue., 26 May. 0.0367 0.0311 0.0340
16:01-17:00, Tue., 26 May. 0.0361 0.0311 0.0338
15:01-16:00, Tue., 26 May. 0.0363 0.0308 0.0340
14:01-15:00, Tue., 26 May. 0.0372 0.0308 0.0337
13:01-14:00, Tue., 26 May. 0.0361 0.0315 0.0336
12:01-13:00, Tue., 26 May. 0.0352 0.0304 0.0334
11:01-12:00, Tue., 26 May. 0.0356 0.0301 0.0334
10:01-11:00, Tue., 26 May. 0.0363 0.0308 0.0336
09:01-10:00, Tue., 26 May. 0.0371 0.0310 0.0336
08:01-09:00, Tue., 26 May. 0.0364 0.0315 0.0337
07:01-08:00, Tue., 26 May. 0.0366 0.0322 0.0344
06:01-07:00, Tue., 26 May. 0.0371 0.0326 0.0348
05:01-06:00, Tue., 26 May. 0.0368 0.0321 0.0351
04:01-05:00, Tue., 26 May. 0.0373 0.0329 0.0349
03:01-04:00, Tue., 26 May. 0.0381 0.0329 0.0348
02:01-03:00, Tue., 26 May. 0.0367 0.0321 0.0345
01:01-02:00, Tue., 26 May. 0.0367 0.0313 0.0339
00:01-01:00, Tue., 26 May. 0.0367 0.0316 0.0335
23:01-24:00, Mon., 25 May. 0.0363 0.0303 0.0334
22:01-23:00, Mon., 25 May. 0.0350 0.0312 0.0333
21:01-22:00, Mon., 25 May. 0.0366 0.0307 0.0332
20:01-21:00, Mon., 25 May. 0.0360 0.0308 0.0331
19:01-20:00, Mon., 25 May. 0.0352 0.0312 0.0333
18:01-19:00, Mon., 25 May. 0.0357 0.0311 0.0332
17:01-18:00, Mon., 25 May. 0.0355 0.0314 0.0335
16:01-17:00, Mon., 25 May. 0.0358 0.0311 0.0334
15:01-16:00, Mon., 25 May. 0.0353 0.0313 0.0334
14:01-15:00, Mon., 25 May. 0.0361 0.0318 0.0335
13:01-14:00, Mon., 25 May. 0.0360 0.0309 0.0333
12:01-13:00, Mon., 25 May. 0.0352 0.0308 0.0333
11:01-12:00, Mon., 25 May. 0.0372 0.0313 0.0335
10:01-11:00, Mon., 25 May. 0.0355 0.0312 0.0336
09:01-10:00, Mon., 25 May. 0.0357 0.0315 0.0334
08:01-09:00, Mon., 25 May. 0.0358 0.0315 0.0338
07:01-08:00, Mon., 25 May. 0.0369 0.0315 0.0342
06:01-07:00, Mon., 25 May. 0.0375 0.0311 0.0343
05:01-06:00, Mon., 25 May. 0.0368 0.0299 0.0340
04:01-05:00, Mon., 25 May. 0.0363 0.0320 0.0341
03:01-04:00, Mon., 25 May. 0.0363 0.0315 0.0337
02:01-03:00, Mon., 25 May. 0.0356 0.0318 0.0337
01:01-02:00, Mon., 25 May. 0.0363 0.0318 0.0341
00:01-01:00, Mon., 25 May. 0.0362 0.0315 0.0338
23:01-24:00, Sun., 24 May. 0.0357 0.0302 0.0330
22:01-23:00, Sun., 24 May. 0.0354 0.0311 0.0333
21:01-22:00, Sun., 24 May. 0.0357 0.0311 0.0331
20:01-21:00, Sun., 24 May. 0.0351 0.0309 0.0329
19:01-20:00, Sun., 24 May. 0.0360 0.0308 0.0330
18:01-19:00, Sun., 24 May. 0.0351 0.0309 0.0329
17:01-18:00, Sun., 24 May. 0.0350 0.0293 0.0328
16:01-17:00, Sun., 24 May. 0.0362 0.0314 0.0330
15:01-16:00, Sun., 24 May. 0.0354 0.0300 0.0329
14:01-15:00, Sun., 24 May. 0.0354 0.0305 0.0332
13:01-14:00, Sun., 24 May. 0.0353 0.0303 0.0330
12:01-13:00, Sun., 24 May. 0.0352 0.0308 0.0328
11:01-12:00, Sun., 24 May. 0.0346 0.0301 0.0326
10:01-11:00, Sun., 24 May. 0.0348 0.0292 0.0325
09:01-10:00, Sun., 24 May. 0.0352 0.0298 0.0324
08:01-09:00, Sun., 24 May. 0.0341 0.0297 0.0323
07:01-08:00, Sun., 24 May. 0.0349 0.0306 0.0328
06:01-07:00, Sun., 24 May. 0.0346 0.0303 0.0326
05:01-06:00, Sun., 24 May. 0.0355 0.0301 0.0325
04:01-05:00, Sun., 24 May. 0.0349 0.0301 0.0326
03:01-04:00, Sun., 24 May. 0.0360 0.0313 0.0333
02:01-03:00, Sun., 24 May. 0.0367 0.0304 0.0331
01:01-02:00, Sun., 24 May. 0.0360 0.0304 0.0330
00:01-01:00, Sun., 24 May. 0.0362 0.0311 0.0337
23:01-24:00, Sat., 23 May. 0.0346 0.0295 0.0330
22:01-23:00, Sat., 23 May. 0.0351 0.0304 0.0322
21:01-22:00, Sat., 23 May. 0.0349 0.0302 0.0325
20:01-21:00, Sat., 23 May. 0.0347 0.0308 0.0325
19:01-20:00, Sat., 23 May. 0.0352 0.0298 0.0325
18:01-19:00, Sat., 23 May. 0.0354 0.0300 0.0326
17:01-18:00, Sat., 23 May. 0.0345 0.0307 0.0326
16:01-17:00, Sat., 23 May. 0.0356 0.0308 0.0327
15:01-16:00, Sat., 23 May. 0.0349 0.0298 0.0322
14:01-15:00, Sat., 23 May. 0.0340 0.0300 0.0321
13:01-14:00, Sat., 23 May. 0.0355 0.0297 0.0326
12:01-13:00, Sat., 23 May. 0.0346 0.0293 0.0323
11:01-12:00, Sat., 23 May. 0.0345 0.0304 0.0323
10:01-11:00, Sat., 23 May. 0.0347 0.0306 0.0326
09:01-10:00, Sat., 23 May. 0.0351 0.0309 0.0326
08:01-09:00, Sat., 23 May. 0.0356 0.0297 0.0325
07:01-08:00, Sat., 23 May. 0.0354 0.0302 0.0326
06:01-07:00, Sat., 23 May. 0.0359 0.0299 0.0323
05:01-06:00, Sat., 23 May. 0.0349 0.0302 0.0324
04:01-05:00, Sat., 23 May. 0.0356 0.0307 0.0326
03:01-04:00, Sat., 23 May. 0.0349 0.0309 0.0328
02:01-03:00, Sat., 23 May. 0.0358 0.0308 0.0331
01:01-02:00, Sat., 23 May. 0.0351 0.0293 0.0326
00:01-01:00, Sat., 23 May. 0.0350 0.0303 0.0325
23:01-24:00, Fri., 22 May. 0.0348 0.0307 0.0327
22:01-23:00, Fri., 22 May. 0.0349 0.0303 0.0329
21:01-22:00, Fri., 22 May. 0.0362 0.0299 0.0329
20:01-21:00, Fri., 22 May. 0.0348 0.0303 0.0332
19:01-20:00, Fri., 22 May. 0.0365 0.0309 0.0336
18:01-19:00, Fri., 22 May. 0.0374 0.0314 0.0345
17:01-18:00, Fri., 22 May. 0.0353 0.0304 0.0326
16:01-17:00, Fri., 22 May. 0.0353 0.0304 0.0330
15:01-16:00, Fri., 22 May. 0.0360 0.0310 0.0334