Radiation doses in the air / Measurement results by the hour (Adachi)

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.

News about this monitoring post

Due to a power outage at our center due to statutory inspection of electrical equipment, we will temporarily suspend updating of monitoring post measurement values ​​from 8:00 to 19:00 on Saturday, October 18, 2025.

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
20:01-21:00, Sat., 11 Oct. 0.0401 0.0335 0.0366
19:01-20:00, Sat., 11 Oct. 0.0395 0.0345 0.0364
18:01-19:00, Sat., 11 Oct. 0.0414 0.0343 0.0377
17:01-18:00, Sat., 11 Oct. 0.0431 0.0380 0.0404
16:01-17:00, Sat., 11 Oct. 0.0426 0.0337 0.0394
15:01-16:00, Sat., 11 Oct. 0.0423 0.0345 0.0385
14:01-15:00, Sat., 11 Oct. 0.0492 0.0387 0.0440
13:01-14:00, Sat., 11 Oct. 0.0523 0.0443 0.0483
12:01-13:00, Sat., 11 Oct. 0.0479 0.0409 0.0445
11:01-12:00, Sat., 11 Oct. 0.0478 0.0381 0.0438
10:01-11:00, Sat., 11 Oct. 0.0513 0.0408 0.0462
09:01-10:00, Sat., 11 Oct. 0.0464 0.0367 0.0424
08:01-09:00, Sat., 11 Oct. 0.0393 0.0304 0.0352
07:01-08:00, Sat., 11 Oct. 0.0328 0.0280 0.0308
06:01-07:00, Sat., 11 Oct. 0.0330 0.0294 0.0316
05:01-06:00, Sat., 11 Oct. 0.0332 0.0288 0.0312
04:01-05:00, Sat., 11 Oct. 0.0339 0.0291 0.0310
03:01-04:00, Sat., 11 Oct. 0.0330 0.0294 0.0308
02:01-03:00, Sat., 11 Oct. 0.0329 0.0286 0.0308
01:01-02:00, Sat., 11 Oct. 0.0327 0.0289 0.0308
00:01-01:00, Sat., 11 Oct. 0.0334 0.0287 0.0307
23:01-24:00, Fri., 10 Oct. 0.0326 0.0280 0.0308
22:01-23:00, Fri., 10 Oct. 0.0329 0.0287 0.0308
21:01-22:00, Fri., 10 Oct. 0.0340 0.0276 0.0307
20:01-21:00, Fri., 10 Oct. 0.0323 0.0283 0.0306
19:01-20:00, Fri., 10 Oct. 0.0336 0.0284 0.0304
18:01-19:00, Fri., 10 Oct. 0.0319 0.0279 0.0300
17:01-18:00, Fri., 10 Oct. 0.0324 0.0281 0.0303
16:01-17:00, Fri., 10 Oct. 0.0328 0.0286 0.0306
15:01-16:00, Fri., 10 Oct. 0.0333 0.0286 0.0308
14:01-15:00, Fri., 10 Oct. 0.0334 0.0281 0.0309
13:01-14:00, Fri., 10 Oct. 0.0329 0.0276 0.0309
12:01-13:00, Fri., 10 Oct. 0.0335 0.0282 0.0306
11:01-12:00, Fri., 10 Oct. 0.0328 0.0284 0.0304
10:01-11:00, Fri., 10 Oct. 0.0331 0.0282 0.0306
09:01-10:00, Fri., 10 Oct. 0.0336 0.0287 0.0309
08:01-09:00, Fri., 10 Oct. 0.0331 0.0280 0.0309
07:01-08:00, Fri., 10 Oct. 0.0327 0.0285 0.0307
06:01-07:00, Fri., 10 Oct. 0.0338 0.0289 0.0312
05:01-06:00, Fri., 10 Oct. 0.0335 0.0290 0.0312
04:01-05:00, Fri., 10 Oct. 0.0333 0.0284 0.0310
03:01-04:00, Fri., 10 Oct. 0.0328 0.0286 0.0310
02:01-03:00, Fri., 10 Oct. 0.0325 0.0290 0.0309
01:01-02:00, Fri., 10 Oct. 0.0342 0.0291 0.0313
00:01-01:00, Fri., 10 Oct. 0.0329 0.0283 0.0308
23:01-24:00, Thu., 09 Oct. 0.0334 0.0293 0.0309
22:01-23:00, Thu., 09 Oct. 0.0329 0.0283 0.0310
21:01-22:00, Thu., 09 Oct. 0.0331 0.0283 0.0307
20:01-21:00, Thu., 09 Oct. 0.0333 0.0287 0.0306
19:01-20:00, Thu., 09 Oct. 0.0336 0.0287 0.0307
18:01-19:00, Thu., 09 Oct. 0.0327 0.0273 0.0308
17:01-18:00, Thu., 09 Oct. 0.0330 0.0289 0.0308
16:01-17:00, Thu., 09 Oct. 0.0335 0.0282 0.0308
15:01-16:00, Thu., 09 Oct. 0.0330 0.0287 0.0308
14:01-15:00, Thu., 09 Oct. 0.0457 0.0280 0.0309
13:01-14:00, Thu., 09 Oct. 0.0331 0.0281 0.0305
12:01-13:00, Thu., 09 Oct. 0.0330 0.0286 0.0304
11:01-12:00, Thu., 09 Oct. 0.0328 0.0283 0.0303
10:01-11:00, Thu., 09 Oct. 0.0324 0.0289 0.0307
09:01-10:00, Thu., 09 Oct. 0.0325 0.0281 0.0305
08:01-09:00, Thu., 09 Oct. 0.0332 0.0286 0.0304
07:01-08:00, Thu., 09 Oct. 0.0329 0.0287 0.0307
06:01-07:00, Thu., 09 Oct. 0.0326 0.0275 0.0303
05:01-06:00, Thu., 09 Oct. 0.0322 0.0283 0.0302
04:01-05:00, Thu., 09 Oct. 0.0320 0.0270 0.0300
03:01-04:00, Thu., 09 Oct. 0.0320 0.0280 0.0303
02:01-03:00, Thu., 09 Oct. 0.0325 0.0280 0.0307
01:01-02:00, Thu., 09 Oct. 0.0326 0.0287 0.0305
00:01-01:00, Thu., 09 Oct. 0.0329 0.0284 0.0304
23:01-24:00, Wed., 08 Oct. 0.0321 0.0276 0.0300
22:01-23:00, Wed., 08 Oct. 0.0329 0.0279 0.0302
21:01-22:00, Wed., 08 Oct. 0.0334 0.0280 0.0303
20:01-21:00, Wed., 08 Oct. 0.0329 0.0287 0.0304
19:01-20:00, Wed., 08 Oct. 0.0322 0.0276 0.0302
18:01-19:00, Wed., 08 Oct. 0.0330 0.0273 0.0302
17:01-18:00, Wed., 08 Oct. 0.0322 0.0281 0.0302
16:01-17:00, Wed., 08 Oct. 0.0324 0.0283 0.0304
15:01-16:00, Wed., 08 Oct. 0.0331 0.0283 0.0308
14:01-15:00, Wed., 08 Oct. 0.0326 0.0283 0.0306
13:01-14:00, Wed., 08 Oct. 0.0336 0.0284 0.0308
12:01-13:00, Wed., 08 Oct. 0.0323 0.0283 0.0304
11:01-12:00, Wed., 08 Oct. 0.0330 0.0277 0.0304
10:01-11:00, Wed., 08 Oct. 0.0329 0.0276 0.0300
09:01-10:00, Wed., 08 Oct. 0.0325 0.0279 0.0302
08:01-09:00, Wed., 08 Oct. 0.0327 0.0276 0.0304
07:01-08:00, Wed., 08 Oct. 0.0327 0.0277 0.0303
06:01-07:00, Wed., 08 Oct. 0.0322 0.0264 0.0298
05:01-06:00, Wed., 08 Oct. 0.0322 0.0282 0.0302
04:01-05:00, Wed., 08 Oct. 0.0322 0.0289 0.0305
03:01-04:00, Wed., 08 Oct. 0.0323 0.0286 0.0305
02:01-03:00, Wed., 08 Oct. 0.0325 0.0275 0.0306
01:01-02:00, Wed., 08 Oct. 0.0322 0.0277 0.0304
00:01-01:00, Wed., 08 Oct. 0.0325 0.0286 0.0305
23:01-24:00, Tue., 07 Oct. 0.0331 0.0273 0.0306
22:01-23:00, Tue., 07 Oct. 0.0320 0.0285 0.0305
21:01-22:00, Tue., 07 Oct. 0.0330 0.0283 0.0303
20:01-21:00, Tue., 07 Oct. 0.0322 0.0265 0.0300
19:01-20:00, Tue., 07 Oct. 0.0319 0.0271 0.0295
18:01-19:00, Tue., 07 Oct. 0.0315 0.0273 0.0295
17:01-18:00, Tue., 07 Oct. 0.0322 0.0280 0.0295
16:01-17:00, Tue., 07 Oct. 0.0318 0.0281 0.0299
15:01-16:00, Tue., 07 Oct. 0.0318 0.0276 0.0296
14:01-15:00, Tue., 07 Oct. 0.0327 0.0280 0.0298
13:01-14:00, Tue., 07 Oct. 0.0315 0.0273 0.0298
12:01-13:00, Tue., 07 Oct. 0.0325 0.0276 0.0299
11:01-12:00, Tue., 07 Oct. 0.0314 0.0273 0.0296
10:01-11:00, Tue., 07 Oct. 0.0321 0.0280 0.0302
09:01-10:00, Tue., 07 Oct. 0.0320 0.0281 0.0302
08:01-09:00, Tue., 07 Oct. 0.0315 0.0270 0.0299
07:01-08:00, Tue., 07 Oct. 0.0326 0.0276 0.0300
06:01-07:00, Tue., 07 Oct. 0.0325 0.0280 0.0301
05:01-06:00, Tue., 07 Oct. 0.0316 0.0276 0.0299
04:01-05:00, Tue., 07 Oct. 0.0328 0.0280 0.0302
03:01-04:00, Tue., 07 Oct. 0.0326 0.0276 0.0301
02:01-03:00, Tue., 07 Oct. 0.0318 0.0281 0.0301
01:01-02:00, Tue., 07 Oct. 0.0324 0.0276 0.0301
00:01-01:00, Tue., 07 Oct. 0.0322 0.0282 0.0302
23:01-24:00, Mon., 06 Oct. 0.0322 0.0275 0.0301
22:01-23:00, Mon., 06 Oct. 0.0318 0.0281 0.0299
21:01-22:00, Mon., 06 Oct. 0.0322 0.0272 0.0298
20:01-21:00, Mon., 06 Oct. 0.0323 0.0277 0.0301
19:01-20:00, Mon., 06 Oct. 0.0331 0.0279 0.0299
18:01-19:00, Mon., 06 Oct. 0.0315 0.0273 0.0299
17:01-18:00, Mon., 06 Oct. 0.0324 0.0270 0.0297
16:01-17:00, Mon., 06 Oct. 0.0318 0.0285 0.0301
15:01-16:00, Mon., 06 Oct. 0.0323 0.0290 0.0307
14:01-15:00, Mon., 06 Oct. 0.0333 0.0293 0.0311
13:01-14:00, Mon., 06 Oct. 0.0339 0.0302 0.0321
12:01-13:00, Mon., 06 Oct. 0.0328 0.0282 0.0306
11:01-12:00, Mon., 06 Oct. 0.0337 0.0284 0.0313
10:01-11:00, Mon., 06 Oct. 0.0336 0.0293 0.0317
09:01-10:00, Mon., 06 Oct. 0.0329 0.0290 0.0310
08:01-09:00, Mon., 06 Oct. 0.0321 0.0271 0.0301
07:01-08:00, Mon., 06 Oct. 0.0316 0.0274 0.0299
06:01-07:00, Mon., 06 Oct. 0.0318 0.0281 0.0301
05:01-06:00, Mon., 06 Oct. 0.0325 0.0280 0.0301
04:01-05:00, Mon., 06 Oct. 0.0328 0.0287 0.0306
03:01-04:00, Mon., 06 Oct. 0.0333 0.0282 0.0304
02:01-03:00, Mon., 06 Oct. 0.0331 0.0284 0.0307
01:01-02:00, Mon., 06 Oct. 0.0329 0.0284 0.0307
00:01-01:00, Mon., 06 Oct. 0.0324 0.0281 0.0300
23:01-24:00, Sun., 05 Oct. 0.0320 0.0280 0.0299
22:01-23:00, Sun., 05 Oct. 0.0330 0.0278 0.0299
21:01-22:00, Sun., 05 Oct. 0.0315 0.0278 0.0296
20:01-21:00, Sun., 05 Oct. 0.0314 0.0277 0.0298
19:01-20:00, Sun., 05 Oct. 0.0329 0.0267 0.0297
18:01-19:00, Sun., 05 Oct. 0.0323 0.0273 0.0298
17:01-18:00, Sun., 05 Oct. 0.0317 0.0275 0.0297
16:01-17:00, Sun., 05 Oct. 0.0331 0.0279 0.0299
15:01-16:00, Sun., 05 Oct. 0.0332 0.0286 0.0302
14:01-15:00, Sun., 05 Oct. 0.0327 0.0277 0.0300
13:01-14:00, Sun., 05 Oct. 0.0328 0.0282 0.0301
12:01-13:00, Sun., 05 Oct. 0.0323 0.0281 0.0300
11:01-12:00, Sun., 05 Oct. 0.0320 0.0271 0.0297
10:01-11:00, Sun., 05 Oct. 0.0315 0.0274 0.0297
09:01-10:00, Sun., 05 Oct. 0.0319 0.0274 0.0297
08:01-09:00, Sun., 05 Oct. 0.0322 0.0280 0.0301
07:01-08:00, Sun., 05 Oct. 0.0318 0.0280 0.0299
06:01-07:00, Sun., 05 Oct. 0.0316 0.0276 0.0297
05:01-06:00, Sun., 05 Oct. 0.0314 0.0274 0.0296
04:01-05:00, Sun., 05 Oct. 0.0318 0.0280 0.0299
03:01-04:00, Sun., 05 Oct. 0.0317 0.0276 0.0299
02:01-03:00, Sun., 05 Oct. 0.0324 0.0276 0.0299
01:01-02:00, Sun., 05 Oct. 0.0315 0.0281 0.0298
00:01-01:00, Sun., 05 Oct. 0.0325 0.0283 0.0304
23:01-24:00, Sat., 04 Oct. 0.0332 0.0287 0.0310
22:01-23:00, Sat., 04 Oct. 0.0331 0.0290 0.0312
21:01-22:00, Sat., 04 Oct. 0.0328 0.0280 0.0303
20:01-21:00, Sat., 04 Oct. 0.0330 0.0283 0.0305
19:01-20:00, Sat., 04 Oct. 0.0332 0.0290 0.0308
18:01-19:00, Sat., 04 Oct. 0.0333 0.0287 0.0310
17:01-18:00, Sat., 04 Oct. 0.0335 0.0294 0.0316
16:01-17:00, Sat., 04 Oct. 0.0388 0.0309 0.0344
15:01-16:00, Sat., 04 Oct. 0.0394 0.0322 0.0361
14:01-15:00, Sat., 04 Oct. 0.0469 0.0334 0.0387
13:01-14:00, Sat., 04 Oct. 0.0609 0.0452 0.0534
12:01-13:00, Sat., 04 Oct. 0.0598 0.0314 0.0519
11:01-12:00, Sat., 04 Oct. 0.0329 0.0289 0.0309
10:01-11:00, Sat., 04 Oct. 0.0330 0.0276 0.0309
09:01-10:00, Sat., 04 Oct. 0.0336 0.0293 0.0309
08:01-09:00, Sat., 04 Oct. 0.0334 0.0290 0.0310
07:01-08:00, Sat., 04 Oct. 0.0336 0.0293 0.0315
06:01-07:00, Sat., 04 Oct. 0.0339 0.0294 0.0317
05:01-06:00, Sat., 04 Oct. 0.0335 0.0293 0.0318
04:01-05:00, Sat., 04 Oct. 0.0332 0.0289 0.0312
03:01-04:00, Sat., 04 Oct. 0.0334 0.0294 0.0312
02:01-03:00, Sat., 04 Oct. 0.0335 0.0289 0.0311
01:01-02:00, Sat., 04 Oct. 0.0335 0.0286 0.0308
00:01-01:00, Sat., 04 Oct. 0.0324 0.0279 0.0307
23:01-24:00, Fri., 03 Oct. 0.0323 0.0285 0.0302
22:01-23:00, Fri., 03 Oct. 0.0325 0.0280 0.0303
21:01-22:00, Fri., 03 Oct. 0.0312 0.0273 0.0299
20:01-21:00, Fri., 03 Oct. 0.0322 0.0283 0.0299
19:01-20:00, Fri., 03 Oct. 0.0317 0.0279 0.0298
18:01-19:00, Fri., 03 Oct. 0.0316 0.0280 0.0297
17:01-18:00, Fri., 03 Oct. 0.0329 0.0280 0.0304
16:01-17:00, Fri., 03 Oct. 0.0326 0.0284 0.0303
15:01-16:00, Fri., 03 Oct. 0.0322 0.0284 0.0305
14:01-15:00, Fri., 03 Oct. 0.0327 0.0270 0.0300
13:01-14:00, Fri., 03 Oct. 0.0329 0.0283 0.0305
12:01-13:00, Fri., 03 Oct. 0.0326 0.0287 0.0302
11:01-12:00, Fri., 03 Oct. 0.0330 0.0287 0.0307
10:01-11:00, Fri., 03 Oct. 0.0331 0.0285 0.0305
09:01-10:00, Fri., 03 Oct. 0.0327 0.0268 0.0302
08:01-09:00, Fri., 03 Oct. 0.0329 0.0279 0.0307
07:01-08:00, Fri., 03 Oct. 0.0330 0.0290 0.0308
06:01-07:00, Fri., 03 Oct. 0.0326 0.0280 0.0305
05:01-06:00, Fri., 03 Oct. 0.0324 0.0282 0.0306
04:01-05:00, Fri., 03 Oct. 0.0336 0.0282 0.0308
03:01-04:00, Fri., 03 Oct. 0.0323 0.0271 0.0304
02:01-03:00, Fri., 03 Oct. 0.0325 0.0278 0.0302
01:01-02:00, Fri., 03 Oct. 0.0325 0.0275 0.0302
00:01-01:00, Fri., 03 Oct. 0.0324 0.0284 0.0304
23:01-24:00, Thu., 02 Oct. 0.0326 0.0284 0.0299
22:01-23:00, Thu., 02 Oct. 0.0318 0.0276 0.0297
21:01-22:00, Thu., 02 Oct. 0.0316 0.0275 0.0293
20:01-21:00, Thu., 02 Oct. 0.0319 0.0271 0.0296
19:01-20:00, Thu., 02 Oct. 0.0321 0.0279 0.0297
18:01-19:00, Thu., 02 Oct. 0.0325 0.0276 0.0302
17:01-18:00, Thu., 02 Oct. 0.0329 0.0280 0.0306
16:01-17:00, Thu., 02 Oct. 0.0322 0.0277 0.0302
15:01-16:00, Thu., 02 Oct. 0.0322 0.0280 0.0303
14:01-15:00, Thu., 02 Oct. 0.0325 0.0280 0.0305
13:01-14:00, Thu., 02 Oct. 0.0349 0.0285 0.0302
12:01-13:00, Thu., 02 Oct. 0.0322 0.0287 0.0303
11:01-12:00, Thu., 02 Oct. 0.0333 0.0277 0.0306
10:01-11:00, Thu., 02 Oct. 0.0325 0.0283 0.0303
09:01-10:00, Thu., 02 Oct. 0.0325 0.0286 0.0307
08:01-09:00, Thu., 02 Oct. 0.0325 0.0288 0.0304
07:01-08:00, Thu., 02 Oct. 0.0337 0.0277 0.0308
06:01-07:00, Thu., 02 Oct. 0.0327 0.0287 0.0309
05:01-06:00, Thu., 02 Oct. 0.0319 0.0286 0.0302
04:01-05:00, Thu., 02 Oct. 0.0322 0.0276 0.0300
03:01-04:00, Thu., 02 Oct. 0.0322 0.0277 0.0302
02:01-03:00, Thu., 02 Oct. 0.0321 0.0282 0.0302
01:01-02:00, Thu., 02 Oct. 0.0332 0.0277 0.0300
00:01-01:00, Thu., 02 Oct. 0.0315 0.0270 0.0297
23:01-24:00, Wed., 01 Oct. 0.0326 0.0273 0.0299
22:01-23:00, Wed., 01 Oct. 0.0320 0.0281 0.0300
21:01-22:00, Wed., 01 Oct. 0.0318 0.0285 0.0298