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, Sun., 12 Jul. 0.0358 0.0308 0.0335
11:01-12:00, Sun., 12 Jul. 0.0354 0.0316 0.0337
10:01-11:00, Sun., 12 Jul. 0.0358 0.0314 0.0340
09:01-10:00, Sun., 12 Jul. 0.0366 0.0309 0.0337
08:01-09:00, Sun., 12 Jul. 0.0364 0.0319 0.0346
07:01-08:00, Sun., 12 Jul. 0.0375 0.0326 0.0348
06:01-07:00, Sun., 12 Jul. 0.0375 0.0321 0.0352
05:01-06:00, Sun., 12 Jul. 0.0377 0.0326 0.0350
04:01-05:00, Sun., 12 Jul. 0.0374 0.0328 0.0351
03:01-04:00, Sun., 12 Jul. 0.0373 0.0315 0.0347
02:01-03:00, Sun., 12 Jul. 0.0358 0.0309 0.0333
01:01-02:00, Sun., 12 Jul. 0.0354 0.0311 0.0331
00:01-01:00, Sun., 12 Jul. 0.0354 0.0297 0.0329
23:01-24:00, Sat., 11 Jul. 0.0352 0.0307 0.0329
22:01-23:00, Sat., 11 Jul. 0.0351 0.0297 0.0329
21:01-22:00, Sat., 11 Jul. 0.0347 0.0307 0.0330
20:01-21:00, Sat., 11 Jul. 0.0356 0.0304 0.0329
19:01-20:00, Sat., 11 Jul. 0.0352 0.0309 0.0330
18:01-19:00, Sat., 11 Jul. 0.0346 0.0305 0.0330
17:01-18:00, Sat., 11 Jul. 0.0353 0.0308 0.0331
16:01-17:00, Sat., 11 Jul. 0.0357 0.0304 0.0329
15:01-16:00, Sat., 11 Jul. 0.0353 0.0300 0.0325
14:01-15:00, Sat., 11 Jul. 0.0357 0.0304 0.0328
13:01-14:00, Sat., 11 Jul. 0.0343 0.0304 0.0325
12:01-13:00, Sat., 11 Jul. 0.0348 0.0303 0.0324
11:01-12:00, Sat., 11 Jul. 0.0345 0.0305 0.0326
10:01-11:00, Sat., 11 Jul. 0.0346 0.0304 0.0324
09:01-10:00, Sat., 11 Jul. 0.0349 0.0302 0.0331
08:01-09:00, Sat., 11 Jul. 0.0350 0.0305 0.0331
07:01-08:00, Sat., 11 Jul. 0.0353 0.0310 0.0332
06:01-07:00, Sat., 11 Jul. 0.0356 0.0308 0.0330
05:01-06:00, Sat., 11 Jul. 0.0351 0.0305 0.0331
04:01-05:00, Sat., 11 Jul. 0.0356 0.0303 0.0332
03:01-04:00, Sat., 11 Jul. 0.0364 0.0311 0.0334
02:01-03:00, Sat., 11 Jul. 0.0357 0.0315 0.0332
01:01-02:00, Sat., 11 Jul. 0.0351 0.0309 0.0329
00:01-01:00, Sat., 11 Jul. 0.0352 0.0301 0.0324
23:01-24:00, Fri., 10 Jul. 0.0349 0.0311 0.0328
22:01-23:00, Fri., 10 Jul. 0.0345 0.0303 0.0324
21:01-22:00, Fri., 10 Jul. 0.0350 0.0304 0.0325
20:01-21:00, Fri., 10 Jul. 0.0356 0.0301 0.0327
19:01-20:00, Fri., 10 Jul. 0.0345 0.0301 0.0324
18:01-19:00, Fri., 10 Jul. 0.0359 0.0305 0.0327
17:01-18:00, Fri., 10 Jul. 0.0345 0.0304 0.0325
16:01-17:00, Fri., 10 Jul. 0.0349 0.0301 0.0325
15:01-16:00, Fri., 10 Jul. 0.0349 0.0298 0.0325
14:01-15:00, Fri., 10 Jul. 0.0343 0.0297 0.0323
13:01-14:00, Fri., 10 Jul. 0.0343 0.0296 0.0320
12:01-13:00, Fri., 10 Jul. 0.0340 0.0301 0.0321
11:01-12:00, Fri., 10 Jul. 0.0348 0.0297 0.0324
10:01-11:00, Fri., 10 Jul. 0.0349 0.0299 0.0326
09:01-10:00, Fri., 10 Jul. 0.0353 0.0305 0.0329
08:01-09:00, Fri., 10 Jul. 0.0353 0.0309 0.0331
07:01-08:00, Fri., 10 Jul. 0.0370 0.0317 0.0340
06:01-07:00, Fri., 10 Jul. 0.0369 0.0310 0.0342
05:01-06:00, Fri., 10 Jul. 0.0360 0.0323 0.0343
04:01-05:00, Fri., 10 Jul. 0.0358 0.0308 0.0334
03:01-04:00, Fri., 10 Jul. 0.0349 0.0306 0.0325
02:01-03:00, Fri., 10 Jul. 0.0344 0.0298 0.0323
01:01-02:00, Fri., 10 Jul. 0.0346 0.0303 0.0323
00:01-01:00, Fri., 10 Jul. 0.0344 0.0300 0.0324
23:01-24:00, Thu., 09 Jul. 0.0343 0.0297 0.0320
22:01-23:00, Thu., 09 Jul. 0.0343 0.0298 0.0320
21:01-22:00, Thu., 09 Jul. 0.0353 0.0301 0.0324
20:01-21:00, Thu., 09 Jul. 0.0342 0.0304 0.0322
19:01-20:00, Thu., 09 Jul. 0.0341 0.0307 0.0322
18:01-19:00, Thu., 09 Jul. 0.0345 0.0298 0.0320
17:01-18:00, Thu., 09 Jul. 0.0340 0.0299 0.0321
16:01-17:00, Thu., 09 Jul. 0.0343 0.0290 0.0321
15:01-16:00, Thu., 09 Jul. 0.0343 0.0301 0.0320
14:01-15:00, Thu., 09 Jul. 0.0350 0.0287 0.0319
13:01-14:00, Thu., 09 Jul. 0.0338 0.0298 0.0319
12:01-13:00, Thu., 09 Jul. 0.0339 0.0296 0.0320
11:01-12:00, Thu., 09 Jul. 0.0341 0.0304 0.0320
10:01-11:00, Thu., 09 Jul. 0.0354 0.0294 0.0325
09:01-10:00, Thu., 09 Jul. 0.0351 0.0308 0.0331
08:01-09:00, Thu., 09 Jul. 0.0360 0.0314 0.0339
07:01-08:00, Thu., 09 Jul. 0.0357 0.0318 0.0337
06:01-07:00, Thu., 09 Jul. 0.0362 0.0324 0.0342
05:01-06:00, Thu., 09 Jul. 0.0368 0.0325 0.0345
04:01-05:00, Thu., 09 Jul. 0.0359 0.0308 0.0336
03:01-04:00, Thu., 09 Jul. 0.0356 0.0306 0.0333
02:01-03:00, Thu., 09 Jul. 0.0353 0.0301 0.0326
01:01-02:00, Thu., 09 Jul. 0.0339 0.0304 0.0323
00:01-01:00, Thu., 09 Jul. 0.0349 0.0299 0.0324
23:01-24:00, Wed., 08 Jul. 0.0345 0.0301 0.0320
22:01-23:00, Wed., 08 Jul. 0.0338 0.0290 0.0320
21:01-22:00, Wed., 08 Jul. 0.0336 0.0301 0.0319
20:01-21:00, Wed., 08 Jul. 0.0339 0.0299 0.0319
19:01-20:00, Wed., 08 Jul. 0.0346 0.0294 0.0321
18:01-19:00, Wed., 08 Jul. 0.0341 0.0299 0.0317
17:01-18:00, Wed., 08 Jul. 0.0349 0.0297 0.0319
16:01-17:00, Wed., 08 Jul. 0.0350 0.0298 0.0321
15:01-16:00, Wed., 08 Jul. 0.0343 0.0296 0.0321
14:01-15:00, Wed., 08 Jul. 0.0339 0.0293 0.0319
13:01-14:00, Wed., 08 Jul. 0.0342 0.0299 0.0321
12:01-13:00, Wed., 08 Jul. 0.0350 0.0302 0.0327
11:01-12:00, Wed., 08 Jul. 0.0345 0.0300 0.0324
10:01-11:00, Wed., 08 Jul. 0.0348 0.0292 0.0324
09:01-10:00, Wed., 08 Jul. 0.0350 0.0299 0.0323
08:01-09:00, Wed., 08 Jul. 0.0349 0.0311 0.0329
07:01-08:00, Wed., 08 Jul. 0.0362 0.0315 0.0336
06:01-07:00, Wed., 08 Jul. 0.0363 0.0303 0.0337
05:01-06:00, Wed., 08 Jul. 0.0358 0.0311 0.0337
04:01-05:00, Wed., 08 Jul. 0.0368 0.0312 0.0338
03:01-04:00, Wed., 08 Jul. 0.0356 0.0309 0.0331
02:01-03:00, Wed., 08 Jul. 0.0353 0.0316 0.0332
01:01-02:00, Wed., 08 Jul. 0.0348 0.0308 0.0329
00:01-01:00, Wed., 08 Jul. 0.0356 0.0311 0.0330
23:01-24:00, Tue., 07 Jul. 0.0361 0.0308 0.0332
22:01-23:00, Tue., 07 Jul. 0.0349 0.0299 0.0326
21:01-22:00, Tue., 07 Jul. 0.0345 0.0305 0.0325
20:01-21:00, Tue., 07 Jul. 0.0341 0.0307 0.0323
19:01-20:00, Tue., 07 Jul. 0.0338 0.0290 0.0317
18:01-19:00, Tue., 07 Jul. 0.0344 0.0297 0.0321
17:01-18:00, Tue., 07 Jul. 0.0343 0.0297 0.0319
16:01-17:00, Tue., 07 Jul. 0.0344 0.0292 0.0320
15:01-16:00, Tue., 07 Jul. 0.0344 0.0295 0.0318
14:01-15:00, Tue., 07 Jul. 0.0343 0.0290 0.0321
13:01-14:00, Tue., 07 Jul. 0.0343 0.0294 0.0319
12:01-13:00, Tue., 07 Jul. 0.0339 0.0301 0.0320
11:01-12:00, Tue., 07 Jul. 0.0337 0.0301 0.0318
10:01-11:00, Tue., 07 Jul. 0.0343 0.0300 0.0320
09:01-10:00, Tue., 07 Jul. 0.0343 0.0302 0.0322
08:01-09:00, Tue., 07 Jul. 0.0344 0.0289 0.0322
07:01-08:00, Tue., 07 Jul. 0.0353 0.0298 0.0318
06:01-07:00, Tue., 07 Jul. 0.0347 0.0292 0.0320
05:01-06:00, Tue., 07 Jul. 0.0344 0.0303 0.0322
04:01-05:00, Tue., 07 Jul. 0.0347 0.0301 0.0322
03:01-04:00, Tue., 07 Jul. 0.0345 0.0284 0.0321
02:01-03:00, Tue., 07 Jul. 0.0341 0.0290 0.0318
01:01-02:00, Tue., 07 Jul. 0.0346 0.0294 0.0318
00:01-01:00, Tue., 07 Jul. 0.0334 0.0294 0.0316
23:01-24:00, Mon., 06 Jul. 0.0340 0.0295 0.0316
22:01-23:00, Mon., 06 Jul. 0.0340 0.0299 0.0317
21:01-22:00, Mon., 06 Jul. 0.0354 0.0303 0.0331
20:01-21:00, Mon., 06 Jul. 0.0381 0.0315 0.0357
19:01-20:00, Mon., 06 Jul. 0.0387 0.0332 0.0361
18:01-19:00, Mon., 06 Jul. 0.0387 0.0341 0.0363
17:01-18:00, Mon., 06 Jul. 0.0390 0.0311 0.0352
16:01-17:00, Mon., 06 Jul. 0.0349 0.0296 0.0324
15:01-16:00, Mon., 06 Jul. 0.0360 0.0301 0.0328
14:01-15:00, Mon., 06 Jul. 0.0363 0.0311 0.0339
13:01-14:00, Mon., 06 Jul. 0.0364 0.0300 0.0335
12:01-13:00, Mon., 06 Jul. 0.0339 0.0297 0.0319
11:01-12:00, Mon., 06 Jul. 0.0344 0.0293 0.0320
10:01-11:00, Mon., 06 Jul. 0.0343 0.0301 0.0322
09:01-10:00, Mon., 06 Jul. 0.0346 0.0296 0.0322
08:01-09:00, Mon., 06 Jul. 0.0342 0.0301 0.0319
07:01-08:00, Mon., 06 Jul. 0.0346 0.0303 0.0325
06:01-07:00, Mon., 06 Jul. 0.0346 0.0304 0.0325
05:01-06:00, Mon., 06 Jul. 0.0352 0.0308 0.0332
04:01-05:00, Mon., 06 Jul. 0.0383 0.0315 0.0350
03:01-04:00, Mon., 06 Jul. 0.0390 0.0337 0.0364
02:01-03:00, Mon., 06 Jul. 0.0377 0.0309 0.0341
01:01-02:00, Mon., 06 Jul. 0.0349 0.0311 0.0331
00:01-01:00, Mon., 06 Jul. 0.0363 0.0312 0.0337
23:01-24:00, Sun., 05 Jul. 0.0367 0.0308 0.0333
22:01-23:00, Sun., 05 Jul. 0.0348 0.0300 0.0322
21:01-22:00, Sun., 05 Jul. 0.0341 0.0290 0.0319
20:01-21:00, Sun., 05 Jul. 0.0344 0.0304 0.0319
19:01-20:00, Sun., 05 Jul. 0.0339 0.0297 0.0320
18:01-19:00, Sun., 05 Jul. 0.0341 0.0284 0.0318
17:01-18:00, Sun., 05 Jul. 0.0343 0.0300 0.0320
16:01-17:00, Sun., 05 Jul. 0.0342 0.0299 0.0321
15:01-16:00, Sun., 05 Jul. 0.0338 0.0298 0.0323
14:01-15:00, Sun., 05 Jul. 0.0341 0.0301 0.0321
13:01-14:00, Sun., 05 Jul. 0.0349 0.0300 0.0323
12:01-13:00, Sun., 05 Jul. 0.0356 0.0302 0.0326
11:01-12:00, Sun., 05 Jul. 0.0350 0.0301 0.0327
10:01-11:00, Sun., 05 Jul. 0.0352 0.0295 0.0330
09:01-10:00, Sun., 05 Jul. 0.0347 0.0310 0.0328
08:01-09:00, Sun., 05 Jul. 0.0351 0.0299 0.0325
07:01-08:00, Sun., 05 Jul. 0.0369 0.0315 0.0339
06:01-07:00, Sun., 05 Jul. 0.0357 0.0309 0.0334
05:01-06:00, Sun., 05 Jul. 0.0350 0.0307 0.0324
04:01-05:00, Sun., 05 Jul. 0.0346 0.0297 0.0322
03:01-04:00, Sun., 05 Jul. 0.0352 0.0307 0.0330
02:01-03:00, Sun., 05 Jul. 0.0359 0.0313 0.0336
01:01-02:00, Sun., 05 Jul. 0.0343 0.0299 0.0321
00:01-01:00, Sun., 05 Jul. 0.0351 0.0292 0.0321
23:01-24:00, Sat., 04 Jul. 0.0343 0.0297 0.0327
22:01-23:00, Sat., 04 Jul. 0.0349 0.0302 0.0324
21:01-22:00, Sat., 04 Jul. 0.0338 0.0296 0.0321
20:01-21:00, Sat., 04 Jul. 0.0348 0.0298 0.0319
19:01-20:00, Sat., 04 Jul. 0.0342 0.0297 0.0320
18:01-19:00, Sat., 04 Jul. 0.0351 0.0290 0.0320
17:01-18:00, Sat., 04 Jul. 0.0345 0.0291 0.0318
16:01-17:00, Sat., 04 Jul. 0.0337 0.0299 0.0319
15:01-16:00, Sat., 04 Jul. 0.0352 0.0300 0.0323
14:01-15:00, Sat., 04 Jul. 0.0338 0.0303 0.0321
13:01-14:00, Sat., 04 Jul. 0.0337 0.0302 0.0320
12:01-13:00, Sat., 04 Jul. 0.0349 0.0298 0.0320
11:01-12:00, Sat., 04 Jul. 0.0337 0.0297 0.0319
10:01-11:00, Sat., 04 Jul. 0.0340 0.0299 0.0319
09:01-10:00, Sat., 04 Jul. 0.0349 0.0301 0.0322
08:01-09:00, Sat., 04 Jul. 0.0344 0.0293 0.0320
07:01-08:00, Sat., 04 Jul. 0.0350 0.0300 0.0320
06:01-07:00, Sat., 04 Jul. 0.0345 0.0295 0.0322
05:01-06:00, Sat., 04 Jul. 0.0341 0.0298 0.0321
04:01-05:00, Sat., 04 Jul. 0.0351 0.0301 0.0321
03:01-04:00, Sat., 04 Jul. 0.0343 0.0301 0.0320
02:01-03:00, Sat., 04 Jul. 0.0346 0.0297 0.0324
01:01-02:00, Sat., 04 Jul. 0.0341 0.0291 0.0319
00:01-01:00, Sat., 04 Jul. 0.0341 0.0304 0.0322
23:01-24:00, Fri., 03 Jul. 0.0356 0.0303 0.0322
22:01-23:00, Fri., 03 Jul. 0.0344 0.0294 0.0319
21:01-22:00, Fri., 03 Jul. 0.0346 0.0293 0.0320
20:01-21:00, Fri., 03 Jul. 0.0344 0.0296 0.0320
19:01-20:00, Fri., 03 Jul. 0.0339 0.0301 0.0321
18:01-19:00, Fri., 03 Jul. 0.0339 0.0294 0.0320
17:01-18:00, Fri., 03 Jul. 0.0338 0.0300 0.0320
16:01-17:00, Fri., 03 Jul. 0.0344 0.0298 0.0318
15:01-16:00, Fri., 03 Jul. 0.0348 0.0288 0.0317
14:01-15:00, Fri., 03 Jul. 0.0339 0.0294 0.0321
13:01-14:00, Fri., 03 Jul. 0.0342 0.0296 0.0320
12:01-13:00, Fri., 03 Jul. 0.0349 0.0288 0.0320
11:01-12:00, Fri., 03 Jul. 0.0337 0.0294 0.0318
10:01-11:00, Fri., 03 Jul. 0.0337 0.0299 0.0318
09:01-10:00, Fri., 03 Jul. 0.0350 0.0308 0.0327
08:01-09:00, Fri., 03 Jul. 0.0366 0.0318 0.0341
07:01-08:00, Fri., 03 Jul. 0.0385 0.0339 0.0362
06:01-07:00, Fri., 03 Jul. 0.0389 0.0340 0.0367
05:01-06:00, Fri., 03 Jul. 0.0376 0.0323 0.0348
04:01-05:00, Fri., 03 Jul. 0.0430 0.0348 0.0389
03:01-04:00, Fri., 03 Jul. 0.0430 0.0378 0.0411
02:01-03:00, Fri., 03 Jul. 0.0447 0.0341 0.0398
01:01-02:00, Fri., 03 Jul. 0.0366 0.0308 0.0333
00:01-01:00, Fri., 03 Jul. 0.0348 0.0304 0.0325
23:01-24:00, Thu., 02 Jul. 0.0349 0.0304 0.0326
22:01-23:00, Thu., 02 Jul. 0.0341 0.0301 0.0326
21:01-22:00, Thu., 02 Jul. 0.0356 0.0303 0.0328
20:01-21:00, Thu., 02 Jul. 0.0356 0.0304 0.0328
19:01-20:00, Thu., 02 Jul. 0.0364 0.0289 0.0323
18:01-19:00, Thu., 02 Jul. 0.0336 0.0299 0.0318
17:01-18:00, Thu., 02 Jul. 0.0360 0.0301 0.0320
16:01-17:00, Thu., 02 Jul. 0.0351 0.0290 0.0323
15:01-16:00, Thu., 02 Jul. 0.0338 0.0297 0.0319
14:01-15:00, Thu., 02 Jul. 0.0343 0.0298 0.0321
13:01-14:00, Thu., 02 Jul. 0.0352 0.0290 0.0323