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
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
12:01-13:00, Tue., 16 Dec. 0.0324 0.0268 0.0291
11:01-12:00, Tue., 16 Dec. 0.0309 0.0264 0.0293
10:01-11:00, Tue., 16 Dec. 0.0315 0.0269 0.0290
09:01-10:00, Tue., 16 Dec. 0.0311 0.0270 0.0290
08:01-09:00, Tue., 16 Dec. 0.0311 0.0270 0.0292
07:01-08:00, Tue., 16 Dec. 0.0310 0.0271 0.0289
06:01-07:00, Tue., 16 Dec. 0.0315 0.0267 0.0292
05:01-06:00, Tue., 16 Dec. 0.0308 0.0266 0.0290
04:01-05:00, Tue., 16 Dec. 0.0323 0.0270 0.0292
03:01-04:00, Tue., 16 Dec. 0.0311 0.0270 0.0290
02:01-03:00, Tue., 16 Dec. 0.0310 0.0270 0.0291
01:01-02:00, Tue., 16 Dec. 0.0309 0.0266 0.0292
00:01-01:00, Tue., 16 Dec. 0.0329 0.0267 0.0291
23:01-24:00, Mon., 15 Dec. 0.0315 0.0269 0.0291
22:01-23:00, Mon., 15 Dec. 0.0308 0.0270 0.0290
21:01-22:00, Mon., 15 Dec. 0.0315 0.0266 0.0291
20:01-21:00, Mon., 15 Dec. 0.0308 0.0273 0.0292
19:01-20:00, Mon., 15 Dec. 0.0307 0.0271 0.0289
18:01-19:00, Mon., 15 Dec. 0.0311 0.0259 0.0286
17:01-18:00, Mon., 15 Dec. 0.0308 0.0267 0.0286
16:01-17:00, Mon., 15 Dec. 0.0299 0.0268 0.0284
15:01-16:00, Mon., 15 Dec. 0.0304 0.0264 0.0285
14:01-15:00, Mon., 15 Dec. 0.0322 0.0266 0.0288
13:01-14:00, Mon., 15 Dec. 0.0312 0.0270 0.0290
12:01-13:00, Mon., 15 Dec. 0.0314 0.0270 0.0290
11:01-12:00, Mon., 15 Dec. 0.0307 0.0269 0.0287
10:01-11:00, Mon., 15 Dec. 0.0316 0.0266 0.0289
09:01-10:00, Mon., 15 Dec. 0.0312 0.0260 0.0287
08:01-09:00, Mon., 15 Dec. 0.0304 0.0258 0.0283
07:01-08:00, Mon., 15 Dec. 0.0304 0.0263 0.0284
06:01-07:00, Mon., 15 Dec. 0.0308 0.0268 0.0287
05:01-06:00, Mon., 15 Dec. 0.0311 0.0262 0.0286
04:01-05:00, Mon., 15 Dec. 0.0318 0.0270 0.0291
03:01-04:00, Mon., 15 Dec. 0.0324 0.0270 0.0296
02:01-03:00, Mon., 15 Dec. 0.0317 0.0274 0.0295
01:01-02:00, Mon., 15 Dec. 0.0315 0.0278 0.0296
00:01-01:00, Mon., 15 Dec. 0.0317 0.0273 0.0295
23:01-24:00, Sun., 14 Dec. 0.0318 0.0274 0.0297
22:01-23:00, Sun., 14 Dec. 0.0315 0.0276 0.0293
21:01-22:00, Sun., 14 Dec. 0.0314 0.0266 0.0291
20:01-21:00, Sun., 14 Dec. 0.0316 0.0273 0.0293
19:01-20:00, Sun., 14 Dec. 0.0312 0.0268 0.0291
18:01-19:00, Sun., 14 Dec. 0.0318 0.0270 0.0296
17:01-18:00, Sun., 14 Dec. 0.0311 0.0270 0.0291
16:01-17:00, Sun., 14 Dec. 0.0318 0.0272 0.0292
15:01-16:00, Sun., 14 Dec. 0.0320 0.0270 0.0294
14:01-15:00, Sun., 14 Dec. 0.0326 0.0283 0.0307
13:01-14:00, Sun., 14 Dec. 0.0370 0.0308 0.0337
12:01-13:00, Sun., 14 Dec. 0.0407 0.0350 0.0376
11:01-12:00, Sun., 14 Dec. 0.0495 0.0372 0.0432
10:01-11:00, Sun., 14 Dec. 0.0512 0.0398 0.0458
09:01-10:00, Sun., 14 Dec. 0.0433 0.0363 0.0399
08:01-09:00, Sun., 14 Dec. 0.0408 0.0353 0.0380
07:01-08:00, Sun., 14 Dec. 0.0396 0.0347 0.0366
06:01-07:00, Sun., 14 Dec. 0.0404 0.0362 0.0380
05:01-06:00, Sun., 14 Dec. 0.0404 0.0317 0.0358
04:01-05:00, Sun., 14 Dec. 0.0360 0.0305 0.0330
03:01-04:00, Sun., 14 Dec. 0.0375 0.0313 0.0346
02:01-03:00, Sun., 14 Dec. 0.0336 0.0291 0.0313
01:01-02:00, Sun., 14 Dec. 0.0340 0.0290 0.0312
00:01-01:00, Sun., 14 Dec. 0.0363 0.0308 0.0329
23:01-24:00, Sat., 13 Dec. 0.0381 0.0332 0.0352
22:01-23:00, Sat., 13 Dec. 0.0395 0.0318 0.0352
21:01-22:00, Sat., 13 Dec. 0.0346 0.0304 0.0324
20:01-21:00, Sat., 13 Dec. 0.0349 0.0289 0.0314
19:01-20:00, Sat., 13 Dec. 0.0315 0.0276 0.0295
18:01-19:00, Sat., 13 Dec. 0.0304 0.0270 0.0289
17:01-18:00, Sat., 13 Dec. 0.0308 0.0270 0.0292
16:01-17:00, Sat., 13 Dec. 0.0310 0.0273 0.0292
15:01-16:00, Sat., 13 Dec. 0.0326 0.0276 0.0293
14:01-15:00, Sat., 13 Dec. 0.0311 0.0275 0.0293
13:01-14:00, Sat., 13 Dec. 0.0315 0.0266 0.0292
12:01-13:00, Sat., 13 Dec. 0.0316 0.0267 0.0294
11:01-12:00, Sat., 13 Dec. 0.0312 0.0271 0.0294
10:01-11:00, Sat., 13 Dec. 0.0309 0.0270 0.0293
09:01-10:00, Sat., 13 Dec. 0.0312 0.0267 0.0295
08:01-09:00, Sat., 13 Dec. 0.0318 0.0271 0.0293
07:01-08:00, Sat., 13 Dec. 0.0315 0.0266 0.0291
06:01-07:00, Sat., 13 Dec. 0.0316 0.0274 0.0293
05:01-06:00, Sat., 13 Dec. 0.0316 0.0273 0.0291
04:01-05:00, Sat., 13 Dec. 0.0317 0.0276 0.0295
03:01-04:00, Sat., 13 Dec. 0.0325 0.0279 0.0296
02:01-03:00, Sat., 13 Dec. 0.0325 0.0272 0.0299
01:01-02:00, Sat., 13 Dec. 0.0316 0.0277 0.0297
00:01-01:00, Sat., 13 Dec. 0.0323 0.0282 0.0300
23:01-24:00, Fri., 12 Dec. 0.0318 0.0275 0.0299
22:01-23:00, Fri., 12 Dec. 0.0321 0.0275 0.0295
21:01-22:00, Fri., 12 Dec. 0.0312 0.0273 0.0297
20:01-21:00, Fri., 12 Dec. 0.0316 0.0276 0.0297
19:01-20:00, Fri., 12 Dec. 0.0313 0.0270 0.0291
18:01-19:00, Fri., 12 Dec. 0.0308 0.0268 0.0291
17:01-18:00, Fri., 12 Dec. 0.0311 0.0274 0.0292
16:01-17:00, Fri., 12 Dec. 0.0308 0.0266 0.0290
15:01-16:00, Fri., 12 Dec. 0.0323 0.0265 0.0291
14:01-15:00, Fri., 12 Dec. 0.0318 0.0270 0.0294
13:01-14:00, Fri., 12 Dec. 0.0316 0.0273 0.0293
12:01-13:00, Fri., 12 Dec. 0.0311 0.0262 0.0292
11:01-12:00, Fri., 12 Dec. 0.0315 0.0270 0.0292
10:01-11:00, Fri., 12 Dec. 0.0317 0.0276 0.0295
09:01-10:00, Fri., 12 Dec. 0.0318 0.0264 0.0294
08:01-09:00, Fri., 12 Dec. 0.0321 0.0273 0.0297
07:01-08:00, Fri., 12 Dec. 0.0324 0.0276 0.0300
06:01-07:00, Fri., 12 Dec. 0.0325 0.0280 0.0300
05:01-06:00, Fri., 12 Dec. 0.0329 0.0287 0.0306
04:01-05:00, Fri., 12 Dec. 0.0334 0.0286 0.0307
03:01-04:00, Fri., 12 Dec. 0.0325 0.0284 0.0308
02:01-03:00, Fri., 12 Dec. 0.0331 0.0297 0.0311
01:01-02:00, Fri., 12 Dec. 0.0325 0.0285 0.0304
00:01-01:00, Fri., 12 Dec. 0.0325 0.0283 0.0305
23:01-24:00, Thu., 11 Dec. 0.0332 0.0287 0.0306
22:01-23:00, Thu., 11 Dec. 0.0327 0.0282 0.0305
21:01-22:00, Thu., 11 Dec. 0.0319 0.0280 0.0301
20:01-21:00, Thu., 11 Dec. 0.0329 0.0276 0.0297
19:01-20:00, Thu., 11 Dec. 0.0326 0.0280 0.0298
18:01-19:00, Thu., 11 Dec. 0.0330 0.0273 0.0299
17:01-18:00, Thu., 11 Dec. 0.0322 0.0278 0.0297
16:01-17:00, Thu., 11 Dec. 0.0312 0.0276 0.0294
15:01-16:00, Thu., 11 Dec. 0.0326 0.0269 0.0300
14:01-15:00, Thu., 11 Dec. 0.0336 0.0282 0.0306
13:01-14:00, Thu., 11 Dec. 0.0331 0.0291 0.0308
12:01-13:00, Thu., 11 Dec. 0.0336 0.0290 0.0308
11:01-12:00, Thu., 11 Dec. 0.0336 0.0287 0.0312
10:01-11:00, Thu., 11 Dec. 0.0332 0.0294 0.0313
09:01-10:00, Thu., 11 Dec. 0.0336 0.0279 0.0311
08:01-09:00, Thu., 11 Dec. 0.0336 0.0290 0.0308
07:01-08:00, Thu., 11 Dec. 0.0333 0.0291 0.0307
06:01-07:00, Thu., 11 Dec. 0.0334 0.0282 0.0307