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
04:01-05:00, Wed., 18 Feb. 0.0311 0.0262 0.0295
03:01-04:00, Wed., 18 Feb. 0.0326 0.0274 0.0294
02:01-03:00, Wed., 18 Feb. 0.0311 0.0272 0.0293
01:01-02:00, Wed., 18 Feb. 0.0313 0.0274 0.0293
00:01-01:00, Wed., 18 Feb. 0.0327 0.0278 0.0301
23:01-24:00, Tue., 17 Feb. 0.0331 0.0287 0.0308
22:01-23:00, Tue., 17 Feb. 0.0326 0.0274 0.0303
21:01-22:00, Tue., 17 Feb. 0.0315 0.0275 0.0293
20:01-21:00, Tue., 17 Feb. 0.0314 0.0270 0.0292
19:01-20:00, Tue., 17 Feb. 0.0311 0.0271 0.0293
18:01-19:00, Tue., 17 Feb. 0.0313 0.0265 0.0291
17:01-18:00, Tue., 17 Feb. 0.0306 0.0266 0.0289
16:01-17:00, Tue., 17 Feb. 0.0315 0.0273 0.0291
15:01-16:00, Tue., 17 Feb. 0.0308 0.0269 0.0289
14:01-15:00, Tue., 17 Feb. 0.0318 0.0282 0.0296
13:01-14:00, Tue., 17 Feb. 0.0315 0.0274 0.0293
12:01-13:00, Tue., 17 Feb. 0.0317 0.0270 0.0292
11:01-12:00, Tue., 17 Feb. 0.0315 0.0276 0.0294
10:01-11:00, Tue., 17 Feb. 0.0318 0.0268 0.0293
09:01-10:00, Tue., 17 Feb. 0.0315 0.0265 0.0291
08:01-09:00, Tue., 17 Feb. 0.0322 0.0269 0.0291
07:01-08:00, Tue., 17 Feb. 0.0320 0.0268 0.0293
06:01-07:00, Tue., 17 Feb. 0.0325 0.0273 0.0300
05:01-06:00, Tue., 17 Feb. 0.0346 0.0294 0.0318
04:01-05:00, Tue., 17 Feb. 0.0328 0.0287 0.0308
03:01-04:00, Tue., 17 Feb. 0.0330 0.0289 0.0310
02:01-03:00, Tue., 17 Feb. 0.0333 0.0287 0.0313
01:01-02:00, Tue., 17 Feb. 0.0405 0.0310 0.0346
00:01-01:00, Tue., 17 Feb. 0.0562 0.0377 0.0459
23:01-24:00, Mon., 16 Feb. 0.0688 0.0507 0.0621
22:01-23:00, Mon., 16 Feb. 0.0756 0.0636 0.0692
21:01-22:00, Mon., 16 Feb. 0.0756 0.0641 0.0719
20:01-21:00, Mon., 16 Feb. 0.0651 0.0332 0.0443
19:01-20:00, Mon., 16 Feb. 0.0380 0.0309 0.0342
18:01-19:00, Mon., 16 Feb. 0.0338 0.0285 0.0306
17:01-18:00, Mon., 16 Feb. 0.0318 0.0275 0.0301
16:01-17:00, Mon., 16 Feb. 0.0323 0.0278 0.0300
15:01-16:00, Mon., 16 Feb. 0.0318 0.0286 0.0302
14:01-15:00, Mon., 16 Feb. 0.0320 0.0277 0.0300
13:01-14:00, Mon., 16 Feb. 0.0322 0.0284 0.0304
12:01-13:00, Mon., 16 Feb. 0.0315 0.0279 0.0300
11:01-12:00, Mon., 16 Feb. 0.0324 0.0266 0.0298
10:01-11:00, Mon., 16 Feb. 0.0330 0.0289 0.0306
09:01-10:00, Mon., 16 Feb. 0.0332 0.0278 0.0304
08:01-09:00, Mon., 16 Feb. 0.0325 0.0280 0.0304
07:01-08:00, Mon., 16 Feb. 0.0332 0.0283 0.0307
06:01-07:00, Mon., 16 Feb. 0.0329 0.0282 0.0310
05:01-06:00, Mon., 16 Feb. 0.0330 0.0284 0.0306
04:01-05:00, Mon., 16 Feb. 0.0326 0.0274 0.0309
03:01-04:00, Mon., 16 Feb. 0.0327 0.0285 0.0307
02:01-03:00, Mon., 16 Feb. 0.0325 0.0287 0.0307
01:01-02:00, Mon., 16 Feb. 0.0336 0.0287 0.0311
00:01-01:00, Mon., 16 Feb. 0.0333 0.0287 0.0309
23:01-24:00, Sun., 15 Feb. 0.0329 0.0287 0.0307
22:01-23:00, Sun., 15 Feb. 0.0316 0.0282 0.0299
21:01-22:00, Sun., 15 Feb. 0.0324 0.0282 0.0300
20:01-21:00, Sun., 15 Feb. 0.0322 0.0275 0.0299
19:01-20:00, Sun., 15 Feb. 0.0316 0.0277 0.0297
18:01-19:00, Sun., 15 Feb. 0.0319 0.0275 0.0296
17:01-18:00, Sun., 15 Feb. 0.0317 0.0280 0.0299
16:01-17:00, Sun., 15 Feb. 0.0322 0.0280 0.0298
15:01-16:00, Sun., 15 Feb. 0.0327 0.0280 0.0307
14:01-15:00, Sun., 15 Feb. 0.0343 0.0285 0.0306
13:01-14:00, Sun., 15 Feb. 0.0331 0.0288 0.0307
12:01-13:00, Sun., 15 Feb. 0.0339 0.0279 0.0305
11:01-12:00, Sun., 15 Feb. 0.0329 0.0290 0.0307
10:01-11:00, Sun., 15 Feb. 0.0334 0.0290 0.0310
09:01-10:00, Sun., 15 Feb. 0.0333 0.0290 0.0313
08:01-09:00, Sun., 15 Feb. 0.0332 0.0294 0.0313
07:01-08:00, Sun., 15 Feb. 0.0328 0.0283 0.0313
06:01-07:00, Sun., 15 Feb. 0.0333 0.0293 0.0314
05:01-06:00, Sun., 15 Feb. 0.0351 0.0289 0.0312
04:01-05:00, Sun., 15 Feb. 0.0340 0.0289 0.0312
03:01-04:00, Sun., 15 Feb. 0.0329 0.0283 0.0309
02:01-03:00, Sun., 15 Feb. 0.0346 0.0295 0.0310
01:01-02:00, Sun., 15 Feb. 0.0335 0.0280 0.0310
00:01-01:00, Sun., 15 Feb. 0.0328 0.0284 0.0307
23:01-24:00, Sat., 14 Feb. 0.0322 0.0276 0.0302
22:01-23:00, Sat., 14 Feb. 0.0322 0.0280 0.0300
21:01-22:00, Sat., 14 Feb. 0.0322 0.0276 0.0300
20:01-21:00, Sat., 14 Feb. 0.0318 0.0272 0.0297
19:01-20:00, Sat., 14 Feb. 0.0315 0.0276 0.0295
18:01-19:00, Sat., 14 Feb. 0.0311 0.0276 0.0296
17:01-18:00, Sat., 14 Feb. 0.0319 0.0274 0.0295
16:01-17:00, Sat., 14 Feb. 0.0318 0.0270 0.0294
15:01-16:00, Sat., 14 Feb. 0.0317 0.0280 0.0297
14:01-15:00, Sat., 14 Feb. 0.0316 0.0280 0.0299
13:01-14:00, Sat., 14 Feb. 0.0328 0.0282 0.0301
12:01-13:00, Sat., 14 Feb. 0.0326 0.0276 0.0299
11:01-12:00, Sat., 14 Feb. 0.0322 0.0286 0.0303
10:01-11:00, Sat., 14 Feb. 0.0331 0.0283 0.0312
09:01-10:00, Sat., 14 Feb. 0.0334 0.0288 0.0313
08:01-09:00, Sat., 14 Feb. 0.0329 0.0286 0.0309
07:01-08:00, Sat., 14 Feb. 0.0324 0.0287 0.0307
06:01-07:00, Sat., 14 Feb. 0.0337 0.0279 0.0307
05:01-06:00, Sat., 14 Feb. 0.0327 0.0280 0.0307
04:01-05:00, Sat., 14 Feb. 0.0335 0.0288 0.0307
03:01-04:00, Sat., 14 Feb. 0.0331 0.0283 0.0306
02:01-03:00, Sat., 14 Feb. 0.0322 0.0286 0.0303
01:01-02:00, Sat., 14 Feb. 0.0329 0.0280 0.0303
00:01-01:00, Sat., 14 Feb. 0.0326 0.0283 0.0303
23:01-24:00, Fri., 13 Feb. 0.0322 0.0270 0.0300
22:01-23:00, Fri., 13 Feb. 0.0318 0.0271 0.0298
21:01-22:00, Fri., 13 Feb. 0.0314 0.0270 0.0294
20:01-21:00, Fri., 13 Feb. 0.0316 0.0275 0.0294
19:01-20:00, Fri., 13 Feb. 0.0315 0.0273 0.0294
18:01-19:00, Fri., 13 Feb. 0.0313 0.0273 0.0292
17:01-18:00, Fri., 13 Feb. 0.0319 0.0270 0.0292
16:01-17:00, Fri., 13 Feb. 0.0315 0.0272 0.0290
15:01-16:00, Fri., 13 Feb. 0.0318 0.0280 0.0296
14:01-15:00, Fri., 13 Feb. 0.0328 0.0268 0.0296
13:01-14:00, Fri., 13 Feb. 0.0313 0.0279 0.0296
12:01-13:00, Fri., 13 Feb. 0.0318 0.0278 0.0299
11:01-12:00, Fri., 13 Feb. 0.0327 0.0285 0.0299
10:01-11:00, Fri., 13 Feb. 0.0326 0.0280 0.0302
09:01-10:00, Fri., 13 Feb. 0.0319 0.0273 0.0298
08:01-09:00, Fri., 13 Feb. 0.0325 0.0269 0.0300
07:01-08:00, Fri., 13 Feb. 0.0323 0.0284 0.0304
06:01-07:00, Fri., 13 Feb. 0.0329 0.0284 0.0308
05:01-06:00, Fri., 13 Feb. 0.0327 0.0286 0.0307
04:01-05:00, Fri., 13 Feb. 0.0332 0.0284 0.0305
03:01-04:00, Fri., 13 Feb. 0.0326 0.0285 0.0303
02:01-03:00, Fri., 13 Feb. 0.0332 0.0277 0.0303
01:01-02:00, Fri., 13 Feb. 0.0318 0.0278 0.0303
00:01-01:00, Fri., 13 Feb. 0.0326 0.0283 0.0304
23:01-24:00, Thu., 12 Feb. 0.0332 0.0278 0.0303
22:01-23:00, Thu., 12 Feb. 0.0322 0.0286 0.0300
21:01-22:00, Thu., 12 Feb. 0.0322 0.0274 0.0297
20:01-21:00, Thu., 12 Feb. 0.0315 0.0276 0.0297
19:01-20:00, Thu., 12 Feb. 0.0311 0.0274 0.0295
18:01-19:00, Thu., 12 Feb. 0.0314 0.0270 0.0293
17:01-18:00, Thu., 12 Feb. 0.0315 0.0272 0.0294
16:01-17:00, Thu., 12 Feb. 0.0314 0.0270 0.0295
15:01-16:00, Thu., 12 Feb. 0.0314 0.0276 0.0297
14:01-15:00, Thu., 12 Feb. 0.0315 0.0272 0.0296
13:01-14:00, Thu., 12 Feb. 0.0321 0.0273 0.0296
12:01-13:00, Thu., 12 Feb. 0.0317 0.0280 0.0294
11:01-12:00, Thu., 12 Feb. 0.0317 0.0280 0.0297
10:01-11:00, Thu., 12 Feb. 0.0314 0.0279 0.0296
09:01-10:00, Thu., 12 Feb. 0.0310 0.0271 0.0295
08:01-09:00, Thu., 12 Feb. 0.0322 0.0270 0.0292
07:01-08:00, Thu., 12 Feb. 0.0318 0.0272 0.0294
06:01-07:00, Thu., 12 Feb. 0.0317 0.0263 0.0296
05:01-06:00, Thu., 12 Feb. 0.0315 0.0276 0.0297
04:01-05:00, Thu., 12 Feb. 0.0311 0.0275 0.0293
03:01-04:00, Thu., 12 Feb. 0.0321 0.0273 0.0298
02:01-03:00, Thu., 12 Feb. 0.0315 0.0271 0.0295
01:01-02:00, Thu., 12 Feb. 0.0318 0.0276 0.0294
00:01-01:00, Thu., 12 Feb. 0.0318 0.0271 0.0295
23:01-24:00, Wed., 11 Feb. 0.0308 0.0272 0.0292
22:01-23:00, Wed., 11 Feb. 0.0322 0.0269 0.0292
21:01-22:00, Wed., 11 Feb. 0.0303 0.0270 0.0290
20:01-21:00, Wed., 11 Feb. 0.0307 0.0270 0.0289
19:01-20:00, Wed., 11 Feb. 0.0317 0.0271 0.0295
18:01-19:00, Wed., 11 Feb. 0.0322 0.0270 0.0300
17:01-18:00, Wed., 11 Feb. 0.0322 0.0280 0.0302
16:01-17:00, Wed., 11 Feb. 0.0339 0.0284 0.0304
15:01-16:00, Wed., 11 Feb. 0.0329 0.0290 0.0310
14:01-15:00, Wed., 11 Feb. 0.0338 0.0294 0.0316
13:01-14:00, Wed., 11 Feb. 0.0391 0.0310 0.0347
12:01-13:00, Wed., 11 Feb. 0.0485 0.0367 0.0432
11:01-12:00, Wed., 11 Feb. 0.0530 0.0457 0.0495
10:01-11:00, Wed., 11 Feb. 0.0516 0.0442 0.0479
09:01-10:00, Wed., 11 Feb. 0.0477 0.0407 0.0435
08:01-09:00, Wed., 11 Feb. 0.0476 0.0409 0.0446
07:01-08:00, Wed., 11 Feb. 0.0453 0.0381 0.0411
06:01-07:00, Wed., 11 Feb. 0.0401 0.0338 0.0362
05:01-06:00, Wed., 11 Feb. 0.0370 0.0283 0.0326
04:01-05:00, Wed., 11 Feb. 0.0336 0.0275 0.0311
03:01-04:00, Wed., 11 Feb. 0.0328 0.0286 0.0308
02:01-03:00, Wed., 11 Feb. 0.0335 0.0279 0.0307
01:01-02:00, Wed., 11 Feb. 0.0329 0.0284 0.0305
00:01-01:00, Wed., 11 Feb. 0.0326 0.0282 0.0304
23:01-24:00, Tue., 10 Feb. 0.0323 0.0269 0.0301
22:01-23:00, Tue., 10 Feb. 0.0318 0.0284 0.0298
21:01-22:00, Tue., 10 Feb. 0.0315 0.0277 0.0296
20:01-21:00, Tue., 10 Feb. 0.0313 0.0270 0.0297
19:01-20:00, Tue., 10 Feb. 0.0315 0.0273 0.0295
18:01-19:00, Tue., 10 Feb. 0.0316 0.0266 0.0293
17:01-18:00, Tue., 10 Feb. 0.0320 0.0273 0.0291
16:01-17:00, Tue., 10 Feb. 0.0310 0.0272 0.0290
15:01-16:00, Tue., 10 Feb. 0.0308 0.0264 0.0290
14:01-15:00, Tue., 10 Feb. 0.0322 0.0268 0.0292
13:01-14:00, Tue., 10 Feb. 0.0318 0.0270 0.0290
12:01-13:00, Tue., 10 Feb. 0.0318 0.0270 0.0295
11:01-12:00, Tue., 10 Feb. 0.0318 0.0271 0.0294
10:01-11:00, Tue., 10 Feb. 0.0325 0.0277 0.0296
09:01-10:00, Tue., 10 Feb. 0.0322 0.0277 0.0300
08:01-09:00, Tue., 10 Feb. 0.0319 0.0271 0.0297
07:01-08:00, Tue., 10 Feb. 0.0322 0.0273 0.0296
06:01-07:00, Tue., 10 Feb. 0.0315 0.0272 0.0292
05:01-06:00, Tue., 10 Feb. 0.0318 0.0274 0.0294
04:01-05:00, Tue., 10 Feb. 0.0322 0.0273 0.0292
03:01-04:00, Tue., 10 Feb. 0.0315 0.0273 0.0294
02:01-03:00, Tue., 10 Feb. 0.0312 0.0267 0.0291
01:01-02:00, Tue., 10 Feb. 0.0322 0.0272 0.0294
00:01-01:00, Tue., 10 Feb. 0.0314 0.0274 0.0291
23:01-24:00, Mon., 09 Feb. 0.0318 0.0271 0.0291
22:01-23:00, Mon., 09 Feb. 0.0311 0.0271 0.0291
21:01-22:00, Mon., 09 Feb. 0.0314 0.0269 0.0291
20:01-21:00, Mon., 09 Feb. 0.0311 0.0266 0.0292
19:01-20:00, Mon., 09 Feb. 0.0312 0.0266 0.0288
18:01-19:00, Mon., 09 Feb. 0.0310 0.0268 0.0285
17:01-18:00, Mon., 09 Feb. 0.0311 0.0263 0.0288
16:01-17:00, Mon., 09 Feb. 0.0303 0.0260 0.0286
15:01-16:00, Mon., 09 Feb. 0.0313 0.0268 0.0289
14:01-15:00, Mon., 09 Feb. 0.0321 0.0266 0.0289
13:01-14:00, Mon., 09 Feb. 0.0312 0.0270 0.0292
12:01-13:00, Mon., 09 Feb. 0.0309 0.0266 0.0291
11:01-12:00, Mon., 09 Feb. 0.0311 0.0270 0.0289
10:01-11:00, Mon., 09 Feb. 0.0300 0.0268 0.0284
09:01-10:00, Mon., 09 Feb. 0.0308 0.0265 0.0287
08:01-09:00, Mon., 09 Feb. 0.0303 0.0263 0.0281
07:01-08:00, Mon., 09 Feb. 0.0307 0.0266 0.0284
06:01-07:00, Mon., 09 Feb. 0.0306 0.0261 0.0287
05:01-06:00, Mon., 09 Feb. 0.0319 0.0266 0.0289
04:01-05:00, Mon., 09 Feb. 0.0308 0.0263 0.0288
03:01-04:00, Mon., 09 Feb. 0.0311 0.0267 0.0289
02:01-03:00, Mon., 09 Feb. 0.0315 0.0271 0.0294
01:01-02:00, Mon., 09 Feb. 0.0318 0.0274 0.0297
00:01-01:00, Mon., 09 Feb. 0.0314 0.0270 0.0290
23:01-24:00, Sun., 08 Feb. 0.0314 0.0270 0.0292
22:01-23:00, Sun., 08 Feb. 0.0318 0.0271 0.0295
21:01-22:00, Sun., 08 Feb. 0.0315 0.0270 0.0293
20:01-21:00, Sun., 08 Feb. 0.0322 0.0270 0.0290
19:01-20:00, Sun., 08 Feb. 0.0313 0.0267 0.0290
18:01-19:00, Sun., 08 Feb. 0.0314 0.0266 0.0287
17:01-18:00, Sun., 08 Feb. 0.0307 0.0273 0.0288
16:01-17:00, Sun., 08 Feb. 0.0311 0.0270 0.0288
15:01-16:00, Sun., 08 Feb. 0.0316 0.0270 0.0290
14:01-15:00, Sun., 08 Feb. 0.0321 0.0276 0.0298
13:01-14:00, Sun., 08 Feb. 0.0381 0.0289 0.0322
12:01-13:00, Sun., 08 Feb. 0.0390 0.0346 0.0371
11:01-12:00, Sun., 08 Feb. 0.0401 0.0357 0.0377
10:01-11:00, Sun., 08 Feb. 0.0384 0.0339 0.0363
09:01-10:00, Sun., 08 Feb. 0.0374 0.0313 0.0347
08:01-09:00, Sun., 08 Feb. 0.0351 0.0299 0.0326
07:01-08:00, Sun., 08 Feb. 0.0345 0.0299 0.0322
06:01-07:00, Sun., 08 Feb. 0.0378 0.0321 0.0344
05:01-06:00, Sun., 08 Feb. 0.0408 0.0338 0.0374