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
07:01-08:00, Wed., 18 Mar. 0.0307 0.0274 0.0294
06:01-07:00, Wed., 18 Mar. 0.0312 0.0273 0.0292
05:01-06:00, Wed., 18 Mar. 0.0310 0.0266 0.0291
04:01-05:00, Wed., 18 Mar. 0.0316 0.0276 0.0292
03:01-04:00, Wed., 18 Mar. 0.0315 0.0268 0.0291
02:01-03:00, Wed., 18 Mar. 0.0318 0.0257 0.0293
01:01-02:00, Wed., 18 Mar. 0.0308 0.0273 0.0289
00:01-01:00, Wed., 18 Mar. 0.0311 0.0269 0.0289
23:01-24:00, Tue., 17 Mar. 0.0308 0.0261 0.0287
22:01-23:00, Tue., 17 Mar. 0.0307 0.0259 0.0286
21:01-22:00, Tue., 17 Mar. 0.0301 0.0270 0.0288
20:01-21:00, Tue., 17 Mar. 0.0319 0.0267 0.0289
19:01-20:00, Tue., 17 Mar. 0.0312 0.0259 0.0287
18:01-19:00, Tue., 17 Mar. 0.0313 0.0263 0.0282
17:01-18:00, Tue., 17 Mar. 0.0308 0.0263 0.0282
16:01-17:00, Tue., 17 Mar. 0.0314 0.0269 0.0289
15:01-16:00, Tue., 17 Mar. 0.0308 0.0262 0.0287
14:01-15:00, Tue., 17 Mar. 0.0311 0.0270 0.0289
13:01-14:00, Tue., 17 Mar. 0.0310 0.0266 0.0289
12:01-13:00, Tue., 17 Mar. 0.0306 0.0270 0.0288
11:01-12:00, Tue., 17 Mar. 0.0304 0.0260 0.0284
10:01-11:00, Tue., 17 Mar. 0.0311 0.0263 0.0287
09:01-10:00, Tue., 17 Mar. 0.0312 0.0271 0.0290
08:01-09:00, Tue., 17 Mar. 0.0309 0.0269 0.0289
07:01-08:00, Tue., 17 Mar. 0.0308 0.0270 0.0287
06:01-07:00, Tue., 17 Mar. 0.0310 0.0269 0.0290
05:01-06:00, Tue., 17 Mar. 0.0317 0.0273 0.0293
04:01-05:00, Tue., 17 Mar. 0.0318 0.0272 0.0291
03:01-04:00, Tue., 17 Mar. 0.0322 0.0267 0.0291
02:01-03:00, Tue., 17 Mar. 0.0316 0.0271 0.0290
01:01-02:00, Tue., 17 Mar. 0.0309 0.0270 0.0290
00:01-01:00, Tue., 17 Mar. 0.0306 0.0272 0.0288
23:01-24:00, Mon., 16 Mar. 0.0306 0.0270 0.0289
22:01-23:00, Mon., 16 Mar. 0.0314 0.0272 0.0287
21:01-22:00, Mon., 16 Mar. 0.0308 0.0265 0.0288
20:01-21:00, Mon., 16 Mar. 0.0311 0.0266 0.0286
19:01-20:00, Mon., 16 Mar. 0.0304 0.0267 0.0286
18:01-19:00, Mon., 16 Mar. 0.0307 0.0266 0.0285
17:01-18:00, Mon., 16 Mar. 0.0313 0.0266 0.0286
16:01-17:00, Mon., 16 Mar. 0.0310 0.0259 0.0288
15:01-16:00, Mon., 16 Mar. 0.0308 0.0273 0.0288
14:01-15:00, Mon., 16 Mar. 0.0311 0.0271 0.0288
13:01-14:00, Mon., 16 Mar. 0.0307 0.0265 0.0288
12:01-13:00, Mon., 16 Mar. 0.0314 0.0265 0.0287
11:01-12:00, Mon., 16 Mar. 0.0315 0.0270 0.0287
10:01-11:00, Mon., 16 Mar. 0.0304 0.0270 0.0289
09:01-10:00, Mon., 16 Mar. 0.0324 0.0270 0.0290
08:01-09:00, Mon., 16 Mar. 0.0318 0.0272 0.0295
07:01-08:00, Mon., 16 Mar. 0.0311 0.0269 0.0291
06:01-07:00, Mon., 16 Mar. 0.0316 0.0275 0.0293
05:01-06:00, Mon., 16 Mar. 0.0326 0.0275 0.0295
04:01-05:00, Mon., 16 Mar. 0.0329 0.0289 0.0310
03:01-04:00, Mon., 16 Mar. 0.0323 0.0270 0.0298
02:01-03:00, Mon., 16 Mar. 0.0318 0.0270 0.0289
01:01-02:00, Mon., 16 Mar. 0.0310 0.0259 0.0288
00:01-01:00, Mon., 16 Mar. 0.0310 0.0267 0.0285
23:01-24:00, Sun., 15 Mar. 0.0304 0.0259 0.0285
22:01-23:00, Sun., 15 Mar. 0.0310 0.0267 0.0285
21:01-22:00, Sun., 15 Mar. 0.0305 0.0266 0.0284
20:01-21:00, Sun., 15 Mar. 0.0297 0.0266 0.0285
19:01-20:00, Sun., 15 Mar. 0.0304 0.0260 0.0283
18:01-19:00, Sun., 15 Mar. 0.0301 0.0259 0.0282
17:01-18:00, Sun., 15 Mar. 0.0305 0.0264 0.0284
16:01-17:00, Sun., 15 Mar. 0.0302 0.0267 0.0287
15:01-16:00, Sun., 15 Mar. 0.0311 0.0267 0.0288
14:01-15:00, Sun., 15 Mar. 0.0315 0.0259 0.0289
13:01-14:00, Sun., 15 Mar. 0.0309 0.0263 0.0287
12:01-13:00, Sun., 15 Mar. 0.0313 0.0271 0.0288
11:01-12:00, Sun., 15 Mar. 0.0310 0.0266 0.0288
10:01-11:00, Sun., 15 Mar. 0.0304 0.0266 0.0287
09:01-10:00, Sun., 15 Mar. 0.0310 0.0266 0.0285
08:01-09:00, Sun., 15 Mar. 0.0317 0.0270 0.0289
07:01-08:00, Sun., 15 Mar. 0.0311 0.0266 0.0286
06:01-07:00, Sun., 15 Mar. 0.0311 0.0267 0.0288
05:01-06:00, Sun., 15 Mar. 0.0307 0.0269 0.0288
04:01-05:00, Sun., 15 Mar. 0.0314 0.0262 0.0285
03:01-04:00, Sun., 15 Mar. 0.0306 0.0270 0.0284
02:01-03:00, Sun., 15 Mar. 0.0316 0.0265 0.0286
01:01-02:00, Sun., 15 Mar. 0.0302 0.0270 0.0286
00:01-01:00, Sun., 15 Mar. 0.0301 0.0263 0.0286
23:01-24:00, Sat., 14 Mar. 0.0309 0.0261 0.0283
22:01-23:00, Sat., 14 Mar. 0.0303 0.0267 0.0284
21:01-22:00, Sat., 14 Mar. 0.0300 0.0264 0.0282
20:01-21:00, Sat., 14 Mar. 0.0312 0.0269 0.0284
19:01-20:00, Sat., 14 Mar. 0.0304 0.0259 0.0283
18:01-19:00, Sat., 14 Mar. 0.0301 0.0258 0.0282
17:01-18:00, Sat., 14 Mar. 0.0301 0.0263 0.0283
16:01-17:00, Sat., 14 Mar. 0.0301 0.0266 0.0285
15:01-16:00, Sat., 14 Mar. 0.0308 0.0263 0.0284
14:01-15:00, Sat., 14 Mar. 0.0311 0.0259 0.0283
13:01-14:00, Sat., 14 Mar. 0.0310 0.0262 0.0287
12:01-13:00, Sat., 14 Mar. 0.0304 0.0273 0.0288
11:01-12:00, Sat., 14 Mar. 0.0309 0.0266 0.0287
10:01-11:00, Sat., 14 Mar. 0.0308 0.0264 0.0287
09:01-10:00, Sat., 14 Mar. 0.0314 0.0263 0.0288
08:01-09:00, Sat., 14 Mar. 0.0308 0.0261 0.0285
07:01-08:00, Sat., 14 Mar. 0.0304 0.0268 0.0284
06:01-07:00, Sat., 14 Mar. 0.0308 0.0259 0.0283
05:01-06:00, Sat., 14 Mar. 0.0301 0.0268 0.0286
04:01-05:00, Sat., 14 Mar. 0.0308 0.0264 0.0288
03:01-04:00, Sat., 14 Mar. 0.0317 0.0270 0.0288
02:01-03:00, Sat., 14 Mar. 0.0305 0.0272 0.0289
01:01-02:00, Sat., 14 Mar. 0.0313 0.0270 0.0288
00:01-01:00, Sat., 14 Mar. 0.0311 0.0265 0.0288
23:01-24:00, Fri., 13 Mar. 0.0313 0.0270 0.0289
22:01-23:00, Fri., 13 Mar. 0.0318 0.0267 0.0288
21:01-22:00, Fri., 13 Mar. 0.0308 0.0270 0.0287
20:01-21:00, Fri., 13 Mar. 0.0311 0.0263 0.0287
19:01-20:00, Fri., 13 Mar. 0.0315 0.0268 0.0287
18:01-19:00, Fri., 13 Mar. 0.0305 0.0270 0.0284
17:01-18:00, Fri., 13 Mar. 0.0307 0.0262 0.0284
16:01-17:00, Fri., 13 Mar. 0.0306 0.0259 0.0286
15:01-16:00, Fri., 13 Mar. 0.0308 0.0256 0.0286
14:01-15:00, Fri., 13 Mar. 0.0311 0.0263 0.0287
13:01-14:00, Fri., 13 Mar. 0.0307 0.0266 0.0290
12:01-13:00, Fri., 13 Mar. 0.0318 0.0271 0.0288
11:01-12:00, Fri., 13 Mar. 0.0311 0.0269 0.0290
10:01-11:00, Fri., 13 Mar. 0.0308 0.0265 0.0291
09:01-10:00, Fri., 13 Mar. 0.0308 0.0269 0.0286
08:01-09:00, Fri., 13 Mar. 0.0308 0.0258 0.0288
07:01-08:00, Fri., 13 Mar. 0.0315 0.0261 0.0289
06:01-07:00, Fri., 13 Mar. 0.0308 0.0267 0.0289
05:01-06:00, Fri., 13 Mar. 0.0310 0.0274 0.0289
04:01-05:00, Fri., 13 Mar. 0.0311 0.0267 0.0288
03:01-04:00, Fri., 13 Mar. 0.0308 0.0263 0.0289
02:01-03:00, Fri., 13 Mar. 0.0318 0.0265 0.0288
01:01-02:00, Fri., 13 Mar. 0.0316 0.0269 0.0288
00:01-01:00, Fri., 13 Mar. 0.0308 0.0265 0.0289
23:01-24:00, Thu., 12 Mar. 0.0308 0.0276 0.0291
22:01-23:00, Thu., 12 Mar. 0.0322 0.0264 0.0288
21:01-22:00, Thu., 12 Mar. 0.0313 0.0265 0.0290
20:01-21:00, Thu., 12 Mar. 0.0313 0.0266 0.0288
19:01-20:00, Thu., 12 Mar. 0.0308 0.0267 0.0289
18:01-19:00, Thu., 12 Mar. 0.0306 0.0271 0.0287
17:01-18:00, Thu., 12 Mar. 0.0308 0.0270 0.0285
16:01-17:00, Thu., 12 Mar. 0.0322 0.0269 0.0291
15:01-16:00, Thu., 12 Mar. 0.0317 0.0267 0.0290
14:01-15:00, Thu., 12 Mar. 0.0308 0.0271 0.0288
13:01-14:00, Thu., 12 Mar. 0.0335 0.0254 0.0287
12:01-13:00, Thu., 12 Mar. 0.0308 0.0263 0.0284
11:01-12:00, Thu., 12 Mar. 0.0311 0.0261 0.0287
10:01-11:00, Thu., 12 Mar. 0.0312 0.0269 0.0288
09:01-10:00, Thu., 12 Mar. 0.0304 0.0260 0.0286
08:01-09:00, Thu., 12 Mar. 0.0304 0.0270 0.0287
07:01-08:00, Thu., 12 Mar. 0.0304 0.0258 0.0283
06:01-07:00, Thu., 12 Mar. 0.0303 0.0267 0.0284
05:01-06:00, Thu., 12 Mar. 0.0312 0.0263 0.0287
04:01-05:00, Thu., 12 Mar. 0.0309 0.0270 0.0290
03:01-04:00, Thu., 12 Mar. 0.0306 0.0270 0.0284
02:01-03:00, Thu., 12 Mar. 0.0305 0.0270 0.0286
01:01-02:00, Thu., 12 Mar. 0.0306 0.0263 0.0287
00:01-01:00, Thu., 12 Mar. 0.0306 0.0253 0.0289
23:01-24:00, Wed., 11 Mar. 0.0310 0.0262 0.0289
22:01-23:00, Wed., 11 Mar. 0.0301 0.0265 0.0285
21:01-22:00, Wed., 11 Mar. 0.0311 0.0269 0.0285
20:01-21:00, Wed., 11 Mar. 0.0308 0.0263 0.0283
19:01-20:00, Wed., 11 Mar. 0.0308 0.0263 0.0285
18:01-19:00, Wed., 11 Mar. 0.0304 0.0268 0.0283
17:01-18:00, Wed., 11 Mar. 0.0304 0.0264 0.0282
16:01-17:00, Wed., 11 Mar. 0.0308 0.0263 0.0285
15:01-16:00, Wed., 11 Mar. 0.0310 0.0269 0.0288
14:01-15:00, Wed., 11 Mar. 0.0313 0.0260 0.0288
13:01-14:00, Wed., 11 Mar. 0.0315 0.0265 0.0287
12:01-13:00, Wed., 11 Mar. 0.0304 0.0266 0.0284
11:01-12:00, Wed., 11 Mar. 0.0310 0.0262 0.0285
10:01-11:00, Wed., 11 Mar. 0.0306 0.0266 0.0286
09:01-10:00, Wed., 11 Mar. 0.0304 0.0260 0.0283
08:01-09:00, Wed., 11 Mar. 0.0305 0.0264 0.0283
07:01-08:00, Wed., 11 Mar. 0.0312 0.0263 0.0282
06:01-07:00, Wed., 11 Mar. 0.0308 0.0257 0.0284
05:01-06:00, Wed., 11 Mar. 0.0310 0.0268 0.0285
04:01-05:00, Wed., 11 Mar. 0.0310 0.0270 0.0285
03:01-04:00, Wed., 11 Mar. 0.0306 0.0265 0.0286
02:01-03:00, Wed., 11 Mar. 0.0303 0.0258 0.0285
01:01-02:00, Wed., 11 Mar. 0.0312 0.0261 0.0283
00:01-01:00, Wed., 11 Mar. 0.0304 0.0267 0.0283
23:01-24:00, Tue., 10 Mar. 0.0307 0.0259 0.0280
22:01-23:00, Tue., 10 Mar. 0.0315 0.0257 0.0287
21:01-22:00, Tue., 10 Mar. 0.0329 0.0277 0.0302
20:01-21:00, Tue., 10 Mar. 0.0401 0.0308 0.0349
19:01-20:00, Tue., 10 Mar. 0.0518 0.0383 0.0457
18:01-19:00, Tue., 10 Mar. 0.0420 0.0274 0.0298
17:01-18:00, Tue., 10 Mar. 0.0304 0.0270 0.0287
16:01-17:00, Tue., 10 Mar. 0.0301 0.0266 0.0287
15:01-16:00, Tue., 10 Mar. 0.0315 0.0266 0.0289
14:01-15:00, Tue., 10 Mar. 0.0323 0.0272 0.0296
13:01-14:00, Tue., 10 Mar. 0.0367 0.0290 0.0325
12:01-13:00, Tue., 10 Mar. 0.0507 0.0332 0.0421
11:01-12:00, Tue., 10 Mar. 0.0572 0.0496 0.0540
10:01-11:00, Tue., 10 Mar. 0.0533 0.0470 0.0502
09:01-10:00, Tue., 10 Mar. 0.0537 0.0446 0.0490
08:01-09:00, Tue., 10 Mar. 0.0529 0.0435 0.0491
07:01-08:00, Tue., 10 Mar. 0.0497 0.0361 0.0430
06:01-07:00, Tue., 10 Mar. 0.0396 0.0281 0.0322
05:01-06:00, Tue., 10 Mar. 0.0311 0.0272 0.0290
04:01-05:00, Tue., 10 Mar. 0.0308 0.0263 0.0287
03:01-04:00, Tue., 10 Mar. 0.0310 0.0266 0.0286
02:01-03:00, Tue., 10 Mar. 0.0310 0.0270 0.0289
01:01-02:00, Tue., 10 Mar. 0.0305 0.0271 0.0290
00:01-01:00, Tue., 10 Mar. 0.0319 0.0270 0.0292
23:01-24:00, Mon., 09 Mar. 0.0304 0.0271 0.0289
22:01-23:00, Mon., 09 Mar. 0.0313 0.0261 0.0289
21:01-22:00, Mon., 09 Mar. 0.0304 0.0273 0.0286
20:01-21:00, Mon., 09 Mar. 0.0304 0.0266 0.0286
19:01-20:00, Mon., 09 Mar. 0.0314 0.0263 0.0288
18:01-19:00, Mon., 09 Mar. 0.0311 0.0270 0.0286
17:01-18:00, Mon., 09 Mar. 0.0300 0.0262 0.0286
16:01-17:00, Mon., 09 Mar. 0.0310 0.0262 0.0288
15:01-16:00, Mon., 09 Mar. 0.0315 0.0266 0.0290
14:01-15:00, Mon., 09 Mar. 0.0312 0.0270 0.0289
13:01-14:00, Mon., 09 Mar. 0.0331 0.0274 0.0292
12:01-13:00, Mon., 09 Mar. 0.0313 0.0272 0.0290
11:01-12:00, Mon., 09 Mar. 0.0311 0.0266 0.0291
10:01-11:00, Mon., 09 Mar. 0.0315 0.0265 0.0290
09:01-10:00, Mon., 09 Mar. 0.0311 0.0266 0.0290
08:01-09:00, Mon., 09 Mar. 0.0303 0.0266 0.0287
07:01-08:00, Mon., 09 Mar. 0.0312 0.0259 0.0286
06:01-07:00, Mon., 09 Mar. 0.0311 0.0269 0.0287
05:01-06:00, Mon., 09 Mar. 0.0315 0.0261 0.0289
04:01-05:00, Mon., 09 Mar. 0.0316 0.0268 0.0290
03:01-04:00, Mon., 09 Mar. 0.0308 0.0269 0.0288
02:01-03:00, Mon., 09 Mar. 0.0316 0.0270 0.0292
01:01-02:00, Mon., 09 Mar. 0.0309 0.0271 0.0290
00:01-01:00, Mon., 09 Mar. 0.0322 0.0271 0.0290
23:01-24:00, Sun., 08 Mar. 0.0318 0.0270 0.0293
22:01-23:00, Sun., 08 Mar. 0.0322 0.0263 0.0288
21:01-22:00, Sun., 08 Mar. 0.0312 0.0266 0.0290
20:01-21:00, Sun., 08 Mar. 0.0314 0.0270 0.0291
19:01-20:00, Sun., 08 Mar. 0.0320 0.0271 0.0289
18:01-19:00, Sun., 08 Mar. 0.0313 0.0273 0.0289
17:01-18:00, Sun., 08 Mar. 0.0325 0.0265 0.0289
16:01-17:00, Sun., 08 Mar. 0.0312 0.0273 0.0290
15:01-16:00, Sun., 08 Mar. 0.0312 0.0270 0.0291
14:01-15:00, Sun., 08 Mar. 0.0318 0.0273 0.0292
13:01-14:00, Sun., 08 Mar. 0.0309 0.0270 0.0290
12:01-13:00, Sun., 08 Mar. 0.0311 0.0280 0.0294
11:01-12:00, Sun., 08 Mar. 0.0305 0.0272 0.0290
10:01-11:00, Sun., 08 Mar. 0.0315 0.0264 0.0289
09:01-10:00, Sun., 08 Mar. 0.0311 0.0261 0.0291
08:01-09:00, Sun., 08 Mar. 0.0308 0.0278 0.0292