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.

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., 22 Dec. 0.0336 0.0283 0.0307
11:01-12:00, Sun., 22 Dec. 0.0330 0.0280 0.0306
10:01-11:00, Sun., 22 Dec. 0.0322 0.0284 0.0304
09:01-10:00, Sun., 22 Dec. 0.0320 0.0286 0.0303
08:01-09:00, Sun., 22 Dec. 0.0334 0.0281 0.0303
07:01-08:00, Sun., 22 Dec. 0.0329 0.0289 0.0304
06:01-07:00, Sun., 22 Dec. 0.0322 0.0285 0.0304
05:01-06:00, Sun., 22 Dec. 0.0328 0.0280 0.0304
04:01-05:00, Sun., 22 Dec. 0.0329 0.0287 0.0309
03:01-04:00, Sun., 22 Dec. 0.0330 0.0290 0.0310
02:01-03:00, Sun., 22 Dec. 0.0332 0.0289 0.0305
01:01-02:00, Sun., 22 Dec. 0.0335 0.0276 0.0307
00:01-01:00, Sun., 22 Dec. 0.0322 0.0282 0.0304
23:01-24:00, Sat., 21 Dec. 0.0322 0.0279 0.0301
22:01-23:00, Sat., 21 Dec. 0.0318 0.0270 0.0297
21:01-22:00, Sat., 21 Dec. 0.0324 0.0275 0.0296
20:01-21:00, Sat., 21 Dec. 0.0321 0.0273 0.0297
19:01-20:00, Sat., 21 Dec. 0.0311 0.0261 0.0294
18:01-19:00, Sat., 21 Dec. 0.0318 0.0271 0.0293
17:01-18:00, Sat., 21 Dec. 0.0326 0.0270 0.0293
16:01-17:00, Sat., 21 Dec. 0.0319 0.0273 0.0290
15:01-16:00, Sat., 21 Dec. 0.0318 0.0268 0.0294
14:01-15:00, Sat., 21 Dec. 0.0316 0.0282 0.0297
13:01-14:00, Sat., 21 Dec. 0.0321 0.0272 0.0298
12:01-13:00, Sat., 21 Dec. 0.0329 0.0270 0.0297
11:01-12:00, Sat., 21 Dec. 0.0326 0.0292 0.0307
10:01-11:00, Sat., 21 Dec. 0.0335 0.0287 0.0310
09:01-10:00, Sat., 21 Dec. 0.0336 0.0290 0.0314
08:01-09:00, Sat., 21 Dec. 0.0342 0.0298 0.0318
07:01-08:00, Sat., 21 Dec. 0.0332 0.0288 0.0311
06:01-07:00, Sat., 21 Dec. 0.0332 0.0283 0.0310
05:01-06:00, Sat., 21 Dec. 0.0344 0.0292 0.0310
04:01-05:00, Sat., 21 Dec. 0.0334 0.0283 0.0308
03:01-04:00, Sat., 21 Dec. 0.0330 0.0290 0.0309
02:01-03:00, Sat., 21 Dec. 0.0325 0.0283 0.0304
01:01-02:00, Sat., 21 Dec. 0.0326 0.0283 0.0306
00:01-01:00, Sat., 21 Dec. 0.0324 0.0283 0.0303
23:01-24:00, Fri., 20 Dec. 0.0329 0.0280 0.0303
22:01-23:00, Fri., 20 Dec. 0.0324 0.0280 0.0298
21:01-22:00, Fri., 20 Dec. 0.0332 0.0273 0.0297
20:01-21:00, Fri., 20 Dec. 0.0319 0.0276 0.0296
19:01-20:00, Fri., 20 Dec. 0.0326 0.0269 0.0293
18:01-19:00, Fri., 20 Dec. 0.0312 0.0275 0.0294
17:01-18:00, Fri., 20 Dec. 0.0317 0.0267 0.0293
16:01-17:00, Fri., 20 Dec. 0.0314 0.0271 0.0292
15:01-16:00, Fri., 20 Dec. 0.0312 0.0269 0.0293
14:01-15:00, Fri., 20 Dec. 0.0310 0.0268 0.0292
13:01-14:00, Fri., 20 Dec. 0.0314 0.0281 0.0294
12:01-13:00, Fri., 20 Dec. 0.0311 0.0272 0.0291
11:01-12:00, Fri., 20 Dec. 0.0321 0.0274 0.0292
10:01-11:00, Fri., 20 Dec. 0.0313 0.0265 0.0292
09:01-10:00, Fri., 20 Dec. 0.0311 0.0270 0.0289
08:01-09:00, Fri., 20 Dec. 0.0324 0.0275 0.0292
07:01-08:00, Fri., 20 Dec. 0.0311 0.0273 0.0290
06:01-07:00, Fri., 20 Dec. 0.0315 0.0265 0.0292
05:01-06:00, Fri., 20 Dec. 0.0315 0.0273 0.0293
04:01-05:00, Fri., 20 Dec. 0.0314 0.0273 0.0293
03:01-04:00, Fri., 20 Dec. 0.0312 0.0279 0.0294
02:01-03:00, Fri., 20 Dec. 0.0310 0.0269 0.0291
01:01-02:00, Fri., 20 Dec. 0.0311 0.0270 0.0290
00:01-01:00, Fri., 20 Dec. 0.0315 0.0267 0.0292
23:01-24:00, Thu., 19 Dec. 0.0315 0.0263 0.0291
22:01-23:00, Thu., 19 Dec. 0.0318 0.0272 0.0290
21:01-22:00, Thu., 19 Dec. 0.0314 0.0258 0.0290
20:01-21:00, Thu., 19 Dec. 0.0311 0.0270 0.0292
19:01-20:00, Thu., 19 Dec. 0.0309 0.0276 0.0292
18:01-19:00, Thu., 19 Dec. 0.0310 0.0259 0.0288
17:01-18:00, Thu., 19 Dec. 0.0318 0.0270 0.0290
16:01-17:00, Thu., 19 Dec. 0.0318 0.0270 0.0293
15:01-16:00, Thu., 19 Dec. 0.0318 0.0280 0.0296
14:01-15:00, Thu., 19 Dec. 0.0316 0.0275 0.0294
13:01-14:00, Thu., 19 Dec. 0.0319 0.0274 0.0295
12:01-13:00, Thu., 19 Dec. 0.0322 0.0268 0.0292
11:01-12:00, Thu., 19 Dec. 0.0310 0.0266 0.0293
10:01-11:00, Thu., 19 Dec. 0.0324 0.0274 0.0294
09:01-10:00, Thu., 19 Dec. 0.0317 0.0280 0.0300
08:01-09:00, Thu., 19 Dec. 0.0332 0.0276 0.0306
07:01-08:00, Thu., 19 Dec. 0.0355 0.0301 0.0324
06:01-07:00, Thu., 19 Dec. 0.0335 0.0293 0.0313
05:01-06:00, Thu., 19 Dec. 0.0346 0.0290 0.0322
04:01-05:00, Thu., 19 Dec. 0.0355 0.0292 0.0319
03:01-04:00, Thu., 19 Dec. 0.0343 0.0294 0.0319
02:01-03:00, Thu., 19 Dec. 0.0343 0.0289 0.0315
01:01-02:00, Thu., 19 Dec. 0.0332 0.0286 0.0302
00:01-01:00, Thu., 19 Dec. 0.0320 0.0276 0.0299
23:01-24:00, Wed., 18 Dec. 0.0325 0.0280 0.0299
22:01-23:00, Wed., 18 Dec. 0.0327 0.0280 0.0299
21:01-22:00, Wed., 18 Dec. 0.0322 0.0277 0.0299
20:01-21:00, Wed., 18 Dec. 0.0315 0.0277 0.0296
19:01-20:00, Wed., 18 Dec. 0.0318 0.0275 0.0298
18:01-19:00, Wed., 18 Dec. 0.0315 0.0275 0.0298
17:01-18:00, Wed., 18 Dec. 0.0324 0.0276 0.0298
16:01-17:00, Wed., 18 Dec. 0.0325 0.0272 0.0297
15:01-16:00, Wed., 18 Dec. 0.0325 0.0282 0.0299
14:01-15:00, Wed., 18 Dec. 0.0316 0.0283 0.0299
13:01-14:00, Wed., 18 Dec. 0.0318 0.0279 0.0298
12:01-13:00, Wed., 18 Dec. 0.0325 0.0280 0.0300
11:01-12:00, Wed., 18 Dec. 0.0324 0.0282 0.0303
10:01-11:00, Wed., 18 Dec. 0.0321 0.0278 0.0302
09:01-10:00, Wed., 18 Dec. 0.0329 0.0283 0.0306
08:01-09:00, Wed., 18 Dec. 0.0332 0.0280 0.0305
07:01-08:00, Wed., 18 Dec. 0.0330 0.0289 0.0305
06:01-07:00, Wed., 18 Dec. 0.0329 0.0290 0.0308
05:01-06:00, Wed., 18 Dec. 0.0326 0.0289 0.0309
04:01-05:00, Wed., 18 Dec. 0.0342 0.0285 0.0311
03:01-04:00, Wed., 18 Dec. 0.0336 0.0289 0.0311
02:01-03:00, Wed., 18 Dec. 0.0328 0.0293 0.0310
01:01-02:00, Wed., 18 Dec. 0.0330 0.0273 0.0307
00:01-01:00, Wed., 18 Dec. 0.0336 0.0290 0.0305
23:01-24:00, Tue., 17 Dec. 0.0326 0.0282 0.0307
22:01-23:00, Tue., 17 Dec. 0.0326 0.0280 0.0303
21:01-22:00, Tue., 17 Dec. 0.0324 0.0272 0.0297
20:01-21:00, Tue., 17 Dec. 0.0311 0.0270 0.0295
19:01-20:00, Tue., 17 Dec. 0.0321 0.0277 0.0297
18:01-19:00, Tue., 17 Dec. 0.0330 0.0278 0.0298
17:01-18:00, Tue., 17 Dec. 0.0319 0.0284 0.0298
16:01-17:00, Tue., 17 Dec. 0.0321 0.0268 0.0294
15:01-16:00, Tue., 17 Dec. 0.0315 0.0275 0.0295
14:01-15:00, Tue., 17 Dec. 0.0330 0.0271 0.0299
13:01-14:00, Tue., 17 Dec. 0.0326 0.0290 0.0304
12:01-13:00, Tue., 17 Dec. 0.0329 0.0280 0.0303
11:01-12:00, Tue., 17 Dec. 0.0325 0.0274 0.0302
10:01-11:00, Tue., 17 Dec. 0.0329 0.0280 0.0311
09:01-10:00, Tue., 17 Dec. 0.0341 0.0298 0.0314
08:01-09:00, Tue., 17 Dec. 0.0339 0.0283 0.0310
07:01-08:00, Tue., 17 Dec. 0.0332 0.0280 0.0308
06:01-07:00, Tue., 17 Dec. 0.0334 0.0287 0.0306
05:01-06:00, Tue., 17 Dec. 0.0339 0.0280 0.0309
04:01-05:00, Tue., 17 Dec. 0.0335 0.0291 0.0310
03:01-04:00, Tue., 17 Dec. 0.0332 0.0283 0.0309
02:01-03:00, Tue., 17 Dec. 0.0329 0.0289 0.0311
01:01-02:00, Tue., 17 Dec. 0.0330 0.0273 0.0306
00:01-01:00, Tue., 17 Dec. 0.0334 0.0279 0.0310
23:01-24:00, Mon., 16 Dec. 0.0340 0.0286 0.0306
22:01-23:00, Mon., 16 Dec. 0.0326 0.0281 0.0304
21:01-22:00, Mon., 16 Dec. 0.0322 0.0270 0.0299
20:01-21:00, Mon., 16 Dec. 0.0318 0.0279 0.0299
19:01-20:00, Mon., 16 Dec. 0.0315 0.0272 0.0298
18:01-19:00, Mon., 16 Dec. 0.0312 0.0273 0.0296
17:01-18:00, Mon., 16 Dec. 0.0313 0.0270 0.0294
16:01-17:00, Mon., 16 Dec. 0.0321 0.0275 0.0296
15:01-16:00, Mon., 16 Dec. 0.0322 0.0277 0.0296
14:01-15:00, Mon., 16 Dec. 0.0313 0.0270 0.0298
13:01-14:00, Mon., 16 Dec. 0.0325 0.0280 0.0301
12:01-13:00, Mon., 16 Dec. 0.0328 0.0276 0.0302
11:01-12:00, Mon., 16 Dec. 0.0318 0.0280 0.0299
10:01-11:00, Mon., 16 Dec. 0.0324 0.0280 0.0303
09:01-10:00, Mon., 16 Dec. 0.0320 0.0270 0.0305
08:01-09:00, Mon., 16 Dec. 0.0329 0.0284 0.0304
07:01-08:00, Mon., 16 Dec. 0.0327 0.0282 0.0302
06:01-07:00, Mon., 16 Dec. 0.0322 0.0272 0.0300
05:01-06:00, Mon., 16 Dec. 0.0329 0.0287 0.0302
04:01-05:00, Mon., 16 Dec. 0.0322 0.0276 0.0302
03:01-04:00, Mon., 16 Dec. 0.0326 0.0280 0.0301
02:01-03:00, Mon., 16 Dec. 0.0322 0.0274 0.0301
01:01-02:00, Mon., 16 Dec. 0.0325 0.0278 0.0302
00:01-01:00, Mon., 16 Dec. 0.0322 0.0278 0.0302
23:01-24:00, Sun., 15 Dec. 0.0322 0.0285 0.0304
22:01-23:00, Sun., 15 Dec. 0.0326 0.0271 0.0302
21:01-22:00, Sun., 15 Dec. 0.0332 0.0278 0.0300
20:01-21:00, Sun., 15 Dec. 0.0322 0.0276 0.0299
19:01-20:00, Sun., 15 Dec. 0.0322 0.0277 0.0297
18:01-19:00, Sun., 15 Dec. 0.0319 0.0278 0.0299
17:01-18:00, Sun., 15 Dec. 0.0314 0.0273 0.0296
16:01-17:00, Sun., 15 Dec. 0.0318 0.0268 0.0294
15:01-16:00, Sun., 15 Dec. 0.0318 0.0267 0.0296
14:01-15:00, Sun., 15 Dec. 0.0323 0.0280 0.0299
13:01-14:00, Sun., 15 Dec. 0.0319 0.0278 0.0297
12:01-13:00, Sun., 15 Dec. 0.0325 0.0277 0.0302
11:01-12:00, Sun., 15 Dec. 0.0330 0.0270 0.0302
10:01-11:00, Sun., 15 Dec. 0.0327 0.0276 0.0300
09:01-10:00, Sun., 15 Dec. 0.0322 0.0276 0.0303
08:01-09:00, Sun., 15 Dec. 0.0332 0.0286 0.0304
07:01-08:00, Sun., 15 Dec. 0.0328 0.0282 0.0302
06:01-07:00, Sun., 15 Dec. 0.0321 0.0276 0.0298
05:01-06:00, Sun., 15 Dec. 0.0323 0.0275 0.0300
04:01-05:00, Sun., 15 Dec. 0.0326 0.0271 0.0295
03:01-04:00, Sun., 15 Dec. 0.0320 0.0270 0.0293
02:01-03:00, Sun., 15 Dec. 0.0316 0.0263 0.0294
01:01-02:00, Sun., 15 Dec. 0.0317 0.0275 0.0296
00:01-01:00, Sun., 15 Dec. 0.0312 0.0272 0.0292
23:01-24:00, Sat., 14 Dec. 0.0311 0.0274 0.0292
22:01-23:00, Sat., 14 Dec. 0.0315 0.0275 0.0291
21:01-22:00, Sat., 14 Dec. 0.0314 0.0274 0.0293
20:01-21:00, Sat., 14 Dec. 0.0311 0.0272 0.0293
19:01-20:00, Sat., 14 Dec. 0.0316 0.0270 0.0294
18:01-19:00, Sat., 14 Dec. 0.0311 0.0265 0.0292
17:01-18:00, Sat., 14 Dec. 0.0318 0.0276 0.0292
16:01-17:00, Sat., 14 Dec. 0.0315 0.0259 0.0291
15:01-16:00, Sat., 14 Dec. 0.0321 0.0271 0.0291
14:01-15:00, Sat., 14 Dec. 0.0311 0.0263 0.0292
13:01-14:00, Sat., 14 Dec. 0.0308 0.0274 0.0292
12:01-13:00, Sat., 14 Dec. 0.0326 0.0266 0.0295
11:01-12:00, Sat., 14 Dec. 0.0327 0.0274 0.0298
10:01-11:00, Sat., 14 Dec. 0.0318 0.0277 0.0294
09:01-10:00, Sat., 14 Dec. 0.0323 0.0276 0.0298
08:01-09:00, Sat., 14 Dec. 0.0319 0.0276 0.0295
07:01-08:00, Sat., 14 Dec. 0.0315 0.0276 0.0296
06:01-07:00, Sat., 14 Dec. 0.0325 0.0281 0.0302
05:01-06:00, Sat., 14 Dec. 0.0341 0.0290 0.0311
04:01-05:00, Sat., 14 Dec. 0.0341 0.0288 0.0312
03:01-04:00, Sat., 14 Dec. 0.0336 0.0286 0.0310
02:01-03:00, Sat., 14 Dec. 0.0337 0.0287 0.0311
01:01-02:00, Sat., 14 Dec. 0.0343 0.0290 0.0310
00:01-01:00, Sat., 14 Dec. 0.0331 0.0281 0.0310
23:01-24:00, Fri., 13 Dec. 0.0337 0.0284 0.0308
22:01-23:00, Fri., 13 Dec. 0.0320 0.0287 0.0304
21:01-22:00, Fri., 13 Dec. 0.0332 0.0286 0.0302
20:01-21:00, Fri., 13 Dec. 0.0325 0.0273 0.0305
19:01-20:00, Fri., 13 Dec. 0.0325 0.0277 0.0302
18:01-19:00, Fri., 13 Dec. 0.0320 0.0270 0.0300
17:01-18:00, Fri., 13 Dec. 0.0322 0.0280 0.0299
16:01-17:00, Fri., 13 Dec. 0.0320 0.0270 0.0298
15:01-16:00, Fri., 13 Dec. 0.0323 0.0278 0.0303
14:01-15:00, Fri., 13 Dec. 0.0326 0.0282 0.0300
13:01-14:00, Fri., 13 Dec. 0.0318 0.0276 0.0298
12:01-13:00, Fri., 13 Dec. 0.0319 0.0274 0.0302
11:01-12:00, Fri., 13 Dec. 0.0316 0.0277 0.0299
10:01-11:00, Fri., 13 Dec. 0.0322 0.0276 0.0296
09:01-10:00, Fri., 13 Dec. 0.0318 0.0271 0.0295
08:01-09:00, Fri., 13 Dec. 0.0322 0.0275 0.0295
07:01-08:00, Fri., 13 Dec. 0.0319 0.0270 0.0294
06:01-07:00, Fri., 13 Dec. 0.0316 0.0274 0.0292
05:01-06:00, Fri., 13 Dec. 0.0312 0.0269 0.0291
04:01-05:00, Fri., 13 Dec. 0.0315 0.0276 0.0294
03:01-04:00, Fri., 13 Dec. 0.0315 0.0273 0.0295
02:01-03:00, Fri., 13 Dec. 0.0318 0.0270 0.0295
01:01-02:00, Fri., 13 Dec. 0.0315 0.0270 0.0293
00:01-01:00, Fri., 13 Dec. 0.0315 0.0270 0.0293
23:01-24:00, Thu., 12 Dec. 0.0308 0.0268 0.0290
22:01-23:00, Thu., 12 Dec. 0.0308 0.0271 0.0291
21:01-22:00, Thu., 12 Dec. 0.0314 0.0264 0.0289
20:01-21:00, Thu., 12 Dec. 0.0317 0.0270 0.0290
19:01-20:00, Thu., 12 Dec. 0.0321 0.0272 0.0289
18:01-19:00, Thu., 12 Dec. 0.0310 0.0265 0.0289
17:01-18:00, Thu., 12 Dec. 0.0312 0.0270 0.0290
16:01-17:00, Thu., 12 Dec. 0.0311 0.0262 0.0290
15:01-16:00, Thu., 12 Dec. 0.0315 0.0263 0.0292
14:01-15:00, Thu., 12 Dec. 0.0309 0.0265 0.0290
13:01-14:00, Thu., 12 Dec. 0.0311 0.0269 0.0291