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, Fri., 26 Dec. 0.0322 0.0285 0.0305
11:01-12:00, Fri., 26 Dec. 0.0349 0.0282 0.0308
10:01-11:00, Fri., 26 Dec. 0.0328 0.0275 0.0305
09:01-10:00, Fri., 26 Dec. 0.0326 0.0280 0.0303
08:01-09:00, Fri., 26 Dec. 0.0326 0.0283 0.0303
07:01-08:00, Fri., 26 Dec. 0.0336 0.0280 0.0306
06:01-07:00, Fri., 26 Dec. 0.0381 0.0305 0.0342
05:01-06:00, Fri., 26 Dec. 0.0396 0.0287 0.0338
04:01-05:00, Fri., 26 Dec. 0.0320 0.0278 0.0300
03:01-04:00, Fri., 26 Dec. 0.0319 0.0276 0.0298
02:01-03:00, Fri., 26 Dec. 0.0322 0.0276 0.0297
01:01-02:00, Fri., 26 Dec. 0.0326 0.0278 0.0301
00:01-01:00, Fri., 26 Dec. 0.0335 0.0285 0.0309
23:01-24:00, Thu., 25 Dec. 0.0347 0.0313 0.0330
22:01-23:00, Thu., 25 Dec. 0.0409 0.0313 0.0359
21:01-22:00, Thu., 25 Dec. 0.0569 0.0397 0.0486
20:01-21:00, Thu., 25 Dec. 0.0640 0.0545 0.0597
19:01-20:00, Thu., 25 Dec. 0.0615 0.0482 0.0540
18:01-19:00, Thu., 25 Dec. 0.0498 0.0388 0.0428
17:01-18:00, Thu., 25 Dec. 0.0438 0.0287 0.0375
16:01-17:00, Thu., 25 Dec. 0.0324 0.0277 0.0304
15:01-16:00, Thu., 25 Dec. 0.0325 0.0268 0.0301
14:01-15:00, Thu., 25 Dec. 0.0319 0.0274 0.0299
13:01-14:00, Thu., 25 Dec. 0.0318 0.0277 0.0298
12:01-13:00, Thu., 25 Dec. 0.0326 0.0279 0.0305
11:01-12:00, Thu., 25 Dec. 0.0339 0.0293 0.0314
10:01-11:00, Thu., 25 Dec. 0.0334 0.0289 0.0313
09:01-10:00, Thu., 25 Dec. 0.0328 0.0286 0.0306
08:01-09:00, Thu., 25 Dec. 0.0322 0.0279 0.0305
07:01-08:00, Thu., 25 Dec. 0.0336 0.0280 0.0306
06:01-07:00, Thu., 25 Dec. 0.0336 0.0278 0.0309
05:01-06:00, Thu., 25 Dec. 0.0338 0.0294 0.0311
04:01-05:00, Thu., 25 Dec. 0.0332 0.0284 0.0308
03:01-04:00, Thu., 25 Dec. 0.0331 0.0290 0.0312
02:01-03:00, Thu., 25 Dec. 0.0326 0.0285 0.0309
01:01-02:00, Thu., 25 Dec. 0.0326 0.0278 0.0305
00:01-01:00, Thu., 25 Dec. 0.0330 0.0284 0.0303
23:01-24:00, Wed., 24 Dec. 0.0321 0.0269 0.0300
22:01-23:00, Wed., 24 Dec. 0.0322 0.0273 0.0299
21:01-22:00, Wed., 24 Dec. 0.0323 0.0289 0.0305
20:01-21:00, Wed., 24 Dec. 0.0324 0.0286 0.0303
19:01-20:00, Wed., 24 Dec. 0.0345 0.0299 0.0321
18:01-19:00, Wed., 24 Dec. 0.0370 0.0310 0.0347
17:01-18:00, Wed., 24 Dec. 0.0350 0.0300 0.0319
16:01-17:00, Wed., 24 Dec. 0.0427 0.0318 0.0369
15:01-16:00, Wed., 24 Dec. 0.0477 0.0400 0.0443
14:01-15:00, Wed., 24 Dec. 0.0493 0.0404 0.0451
13:01-14:00, Wed., 24 Dec. 0.0469 0.0380 0.0427
12:01-13:00, Wed., 24 Dec. 0.0528 0.0390 0.0452
11:01-12:00, Wed., 24 Dec. 0.0564 0.0488 0.0527
10:01-11:00, Wed., 24 Dec. 0.0530 0.0411 0.0475
09:01-10:00, Wed., 24 Dec. 0.0440 0.0338 0.0379
08:01-09:00, Wed., 24 Dec. 0.0457 0.0320 0.0382
07:01-08:00, Wed., 24 Dec. 0.0461 0.0342 0.0405
06:01-07:00, Wed., 24 Dec. 0.0358 0.0306 0.0325
05:01-06:00, Wed., 24 Dec. 0.0333 0.0286 0.0311
04:01-05:00, Wed., 24 Dec. 0.0329 0.0276 0.0298
03:01-04:00, Wed., 24 Dec. 0.0322 0.0270 0.0298
02:01-03:00, Wed., 24 Dec. 0.0326 0.0281 0.0304
01:01-02:00, Wed., 24 Dec. 0.0324 0.0286 0.0304
00:01-01:00, Wed., 24 Dec. 0.0319 0.0276 0.0294
23:01-24:00, Tue., 23 Dec. 0.0320 0.0276 0.0297
22:01-23:00, Tue., 23 Dec. 0.0326 0.0277 0.0294
21:01-22:00, Tue., 23 Dec. 0.0314 0.0275 0.0294
20:01-21:00, Tue., 23 Dec. 0.0310 0.0270 0.0291
19:01-20:00, Tue., 23 Dec. 0.0304 0.0265 0.0289
18:01-19:00, Tue., 23 Dec. 0.0317 0.0270 0.0292
17:01-18:00, Tue., 23 Dec. 0.0320 0.0250 0.0289
16:01-17:00, Tue., 23 Dec. 0.0321 0.0266 0.0290
15:01-16:00, Tue., 23 Dec. 0.0310 0.0266 0.0292
14:01-15:00, Tue., 23 Dec. 0.0311 0.0274 0.0292
13:01-14:00, Tue., 23 Dec. 0.0318 0.0269 0.0290
12:01-13:00, Tue., 23 Dec. 0.0309 0.0271 0.0292
11:01-12:00, Tue., 23 Dec. 0.0319 0.0278 0.0295
10:01-11:00, Tue., 23 Dec. 0.0323 0.0263 0.0298
09:01-10:00, Tue., 23 Dec. 0.0318 0.0283 0.0300
08:01-09:00, Tue., 23 Dec. 0.0320 0.0275 0.0295
07:01-08:00, Tue., 23 Dec. 0.0317 0.0278 0.0297
06:01-07:00, Tue., 23 Dec. 0.0325 0.0288 0.0303
05:01-06:00, Tue., 23 Dec. 0.0317 0.0266 0.0296
04:01-05:00, Tue., 23 Dec. 0.0322 0.0276 0.0295
03:01-04:00, Tue., 23 Dec. 0.0316 0.0271 0.0296
02:01-03:00, Tue., 23 Dec. 0.0320 0.0269 0.0294
01:01-02:00, Tue., 23 Dec. 0.0312 0.0267 0.0289
00:01-01:00, Tue., 23 Dec. 0.0308 0.0270 0.0287
23:01-24:00, Mon., 22 Dec. 0.0309 0.0270 0.0289
22:01-23:00, Mon., 22 Dec. 0.0311 0.0267 0.0290
21:01-22:00, Mon., 22 Dec. 0.0305 0.0276 0.0290
20:01-21:00, Mon., 22 Dec. 0.0315 0.0273 0.0293
19:01-20:00, Mon., 22 Dec. 0.0309 0.0275 0.0291
18:01-19:00, Mon., 22 Dec. 0.0313 0.0270 0.0293
17:01-18:00, Mon., 22 Dec. 0.0308 0.0266 0.0290
16:01-17:00, Mon., 22 Dec. 0.0316 0.0266 0.0289
15:01-16:00, Mon., 22 Dec. 0.0312 0.0270 0.0289
14:01-15:00, Mon., 22 Dec. 0.0311 0.0270 0.0290
13:01-14:00, Mon., 22 Dec. 0.0315 0.0275 0.0291
12:01-13:00, Mon., 22 Dec. 0.0315 0.0271 0.0295
11:01-12:00, Mon., 22 Dec. 0.0318 0.0272 0.0298
10:01-11:00, Mon., 22 Dec. 0.0318 0.0275 0.0296
09:01-10:00, Mon., 22 Dec. 0.0327 0.0277 0.0299
08:01-09:00, Mon., 22 Dec. 0.0336 0.0276 0.0301
07:01-08:00, Mon., 22 Dec. 0.0332 0.0288 0.0305
06:01-07:00, Mon., 22 Dec. 0.0326 0.0280 0.0305
05:01-06:00, Mon., 22 Dec. 0.0353 0.0293 0.0320
04:01-05:00, Mon., 22 Dec. 0.0373 0.0290 0.0337
03:01-04:00, Mon., 22 Dec. 0.0329 0.0282 0.0302
02:01-03:00, Mon., 22 Dec. 0.0319 0.0273 0.0299
01:01-02:00, Mon., 22 Dec. 0.0328 0.0283 0.0306
00:01-01:00, Mon., 22 Dec. 0.0361 0.0297 0.0328
23:01-24:00, Sun., 21 Dec. 0.0419 0.0342 0.0383
22:01-23:00, Sun., 21 Dec. 0.0409 0.0276 0.0339
21:01-22:00, Sun., 21 Dec. 0.0346 0.0304 0.0327
20:01-21:00, Sun., 21 Dec. 0.0346 0.0310 0.0326
19:01-20:00, Sun., 21 Dec. 0.0356 0.0304 0.0328
18:01-19:00, Sun., 21 Dec. 0.0350 0.0297 0.0320
17:01-18:00, Sun., 21 Dec. 0.0338 0.0297 0.0319
16:01-17:00, Sun., 21 Dec. 0.0325 0.0276 0.0304
15:01-16:00, Sun., 21 Dec. 0.0332 0.0273 0.0303
14:01-15:00, Sun., 21 Dec. 0.0326 0.0280 0.0307
13:01-14:00, Sun., 21 Dec. 0.0329 0.0292 0.0310
12:01-13:00, Sun., 21 Dec. 0.0336 0.0290 0.0313
11:01-12:00, Sun., 21 Dec. 0.0322 0.0289 0.0308
10:01-11:00, Sun., 21 Dec. 0.0326 0.0286 0.0306
09:01-10:00, Sun., 21 Dec. 0.0337 0.0290 0.0310
08:01-09:00, Sun., 21 Dec. 0.0342 0.0299 0.0321
07:01-08:00, Sun., 21 Dec. 0.0337 0.0295 0.0313
06:01-07:00, Sun., 21 Dec. 0.0329 0.0283 0.0308
05:01-06:00, Sun., 21 Dec. 0.0329 0.0289 0.0310
04:01-05:00, Sun., 21 Dec. 0.0343 0.0299 0.0319
03:01-04:00, Sun., 21 Dec. 0.0357 0.0300 0.0331
02:01-03:00, Sun., 21 Dec. 0.0352 0.0302 0.0328
01:01-02:00, Sun., 21 Dec. 0.0367 0.0306 0.0334
00:01-01:00, Sun., 21 Dec. 0.0353 0.0297 0.0322
23:01-24:00, Sat., 20 Dec. 0.0343 0.0299 0.0322
22:01-23:00, Sat., 20 Dec. 0.0365 0.0305 0.0335
21:01-22:00, Sat., 20 Dec. 0.0370 0.0308 0.0344
20:01-21:00, Sat., 20 Dec. 0.0353 0.0302 0.0327
19:01-20:00, Sat., 20 Dec. 0.0342 0.0304 0.0323
18:01-19:00, Sat., 20 Dec. 0.0336 0.0289 0.0316
17:01-18:00, Sat., 20 Dec. 0.0338 0.0288 0.0309
16:01-17:00, Sat., 20 Dec. 0.0332 0.0286 0.0313
15:01-16:00, Sat., 20 Dec. 0.0332 0.0290 0.0308
14:01-15:00, Sat., 20 Dec. 0.0328 0.0287 0.0309
13:01-14:00, Sat., 20 Dec. 0.0333 0.0295 0.0309
12:01-13:00, Sat., 20 Dec. 0.0348 0.0297 0.0320
11:01-12:00, Sat., 20 Dec. 0.0346 0.0305 0.0326
10:01-11:00, Sat., 20 Dec. 0.0353 0.0297 0.0327
09:01-10:00, Sat., 20 Dec. 0.0338 0.0294 0.0317
08:01-09:00, Sat., 20 Dec. 0.0343 0.0297 0.0315
07:01-08:00, Sat., 20 Dec. 0.0338 0.0299 0.0315
06:01-07:00, Sat., 20 Dec. 0.0334 0.0292 0.0316
05:01-06:00, Sat., 20 Dec. 0.0333 0.0295 0.0314
04:01-05:00, Sat., 20 Dec. 0.0332 0.0284 0.0308
03:01-04:00, Sat., 20 Dec. 0.0326 0.0280 0.0304
02:01-03:00, Sat., 20 Dec. 0.0327 0.0277 0.0304
01:01-02:00, Sat., 20 Dec. 0.0319 0.0283 0.0301
00:01-01:00, Sat., 20 Dec. 0.0322 0.0283 0.0302
23:01-24:00, Fri., 19 Dec. 0.0319 0.0290 0.0304
22:01-23:00, Fri., 19 Dec. 0.0325 0.0287 0.0302
21:01-22:00, Fri., 19 Dec. 0.0319 0.0282 0.0300
20:01-21:00, Fri., 19 Dec. 0.0332 0.0272 0.0298
19:01-20:00, Fri., 19 Dec. 0.0322 0.0270 0.0299
18:01-19:00, Fri., 19 Dec. 0.0320 0.0276 0.0299
17:01-18:00, Fri., 19 Dec. 0.0315 0.0273 0.0296
16:01-17:00, Fri., 19 Dec. 0.0325 0.0278 0.0296
15:01-16:00, Fri., 19 Dec. 0.0318 0.0275 0.0295
14:01-15:00, Fri., 19 Dec. 0.0315 0.0274 0.0295
13:01-14:00, Fri., 19 Dec. 0.0320 0.0273 0.0296
12:01-13:00, Fri., 19 Dec. 0.0324 0.0280 0.0299
11:01-12:00, Fri., 19 Dec. 0.0321 0.0275 0.0301
10:01-11:00, Fri., 19 Dec. 0.0342 0.0284 0.0305
09:01-10:00, Fri., 19 Dec. 0.0330 0.0290 0.0308
08:01-09:00, Fri., 19 Dec. 0.0329 0.0281 0.0303
07:01-08:00, Fri., 19 Dec. 0.0322 0.0278 0.0301
06:01-07:00, Fri., 19 Dec. 0.0320 0.0277 0.0296
05:01-06:00, Fri., 19 Dec. 0.0312 0.0268 0.0295
04:01-05:00, Fri., 19 Dec. 0.0318 0.0273 0.0296
03:01-04:00, Fri., 19 Dec. 0.0318 0.0278 0.0298
02:01-03:00, Fri., 19 Dec. 0.0318 0.0279 0.0297
01:01-02:00, Fri., 19 Dec. 0.0323 0.0273 0.0295
00:01-01:00, Fri., 19 Dec. 0.0320 0.0275 0.0294
23:01-24:00, Thu., 18 Dec. 0.0310 0.0270 0.0291
22:01-23:00, Thu., 18 Dec. 0.0316 0.0273 0.0294
21:01-22:00, Thu., 18 Dec. 0.0318 0.0276 0.0293
20:01-21:00, Thu., 18 Dec. 0.0315 0.0271 0.0294
19:01-20:00, Thu., 18 Dec. 0.0308 0.0264 0.0292
18:01-19:00, Thu., 18 Dec. 0.0318 0.0270 0.0294
17:01-18:00, Thu., 18 Dec. 0.0310 0.0271 0.0292
16:01-17:00, Thu., 18 Dec. 0.0319 0.0270 0.0288
15:01-16:00, Thu., 18 Dec. 0.0317 0.0270 0.0293
14:01-15:00, Thu., 18 Dec. 0.0310 0.0272 0.0291
13:01-14:00, Thu., 18 Dec. 0.0312 0.0273 0.0293
12:01-13:00, Thu., 18 Dec. 0.0309 0.0273 0.0293
11:01-12:00, Thu., 18 Dec. 0.0318 0.0280 0.0296
10:01-11:00, Thu., 18 Dec. 0.0326 0.0276 0.0296
09:01-10:00, Thu., 18 Dec. 0.0322 0.0270 0.0294
08:01-09:00, Thu., 18 Dec. 0.0320 0.0272 0.0294
07:01-08:00, Thu., 18 Dec. 0.0309 0.0273 0.0291
06:01-07:00, Thu., 18 Dec. 0.0310 0.0276 0.0294
05:01-06:00, Thu., 18 Dec. 0.0312 0.0263 0.0294
04:01-05:00, Thu., 18 Dec. 0.0317 0.0270 0.0295
03:01-04:00, Thu., 18 Dec. 0.0317 0.0270 0.0298
02:01-03:00, Thu., 18 Dec. 0.0318 0.0280 0.0299
01:01-02:00, Thu., 18 Dec. 0.0332 0.0276 0.0304
00:01-01:00, Thu., 18 Dec. 0.0329 0.0290 0.0308
23:01-24:00, Wed., 17 Dec. 0.0330 0.0275 0.0305
22:01-23:00, Wed., 17 Dec. 0.0322 0.0284 0.0303
21:01-22:00, Wed., 17 Dec. 0.0329 0.0272 0.0303
20:01-21:00, Wed., 17 Dec. 0.0316 0.0280 0.0297
19:01-20:00, Wed., 17 Dec. 0.0324 0.0270 0.0297
18:01-19:00, Wed., 17 Dec. 0.0315 0.0270 0.0295
17:01-18:00, Wed., 17 Dec. 0.0326 0.0280 0.0295
16:01-17:00, Wed., 17 Dec. 0.0315 0.0265 0.0296
15:01-16:00, Wed., 17 Dec. 0.0310 0.0273 0.0294
14:01-15:00, Wed., 17 Dec. 0.0321 0.0278 0.0295
13:01-14:00, Wed., 17 Dec. 0.0311 0.0272 0.0294
12:01-13:00, Wed., 17 Dec. 0.0326 0.0270 0.0294
11:01-12:00, Wed., 17 Dec. 0.0318 0.0277 0.0296
10:01-11:00, Wed., 17 Dec. 0.0318 0.0276 0.0299
09:01-10:00, Wed., 17 Dec. 0.0334 0.0282 0.0301
08:01-09:00, Wed., 17 Dec. 0.0324 0.0281 0.0303
07:01-08:00, Wed., 17 Dec. 0.0322 0.0273 0.0299
06:01-07:00, Wed., 17 Dec. 0.0316 0.0276 0.0299
05:01-06:00, Wed., 17 Dec. 0.0331 0.0276 0.0304
04:01-05:00, Wed., 17 Dec. 0.0324 0.0287 0.0304
03:01-04:00, Wed., 17 Dec. 0.0334 0.0276 0.0305
02:01-03:00, Wed., 17 Dec. 0.0327 0.0288 0.0304
01:01-02:00, Wed., 17 Dec. 0.0322 0.0269 0.0300
00:01-01:00, Wed., 17 Dec. 0.0319 0.0280 0.0301
23:01-24:00, Tue., 16 Dec. 0.0329 0.0277 0.0298
22:01-23:00, Tue., 16 Dec. 0.0313 0.0273 0.0292
21:01-22:00, Tue., 16 Dec. 0.0314 0.0273 0.0292
20:01-21:00, Tue., 16 Dec. 0.0310 0.0270 0.0293
19:01-20:00, Tue., 16 Dec. 0.0311 0.0252 0.0290
18:01-19:00, Tue., 16 Dec. 0.0319 0.0266 0.0286
17:01-18:00, Tue., 16 Dec. 0.0305 0.0265 0.0287
16:01-17:00, Tue., 16 Dec. 0.0322 0.0266 0.0289
15:01-16:00, Tue., 16 Dec. 0.0308 0.0269 0.0289
14:01-15:00, Tue., 16 Dec. 0.0308 0.0266 0.0291
13:01-14:00, Tue., 16 Dec. 0.0309 0.0273 0.0289