Radiation doses in the air / Measurement results by the hour (Ota)

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, Thu., 25 Apr. 0.0348 0.0301 0.0319
11:01-12:00, Thu., 25 Apr. 0.0344 0.0297 0.0317
10:01-11:00, Thu., 25 Apr. 0.0345 0.0295 0.0316
09:01-10:00, Thu., 25 Apr. 0.0335 0.0295 0.0314
08:01-09:00, Thu., 25 Apr. 0.0339 0.0294 0.0314
07:01-08:00, Thu., 25 Apr. 0.0338 0.0294 0.0314
06:01-07:00, Thu., 25 Apr. 0.0333 0.0291 0.0312
05:01-06:00, Thu., 25 Apr. 0.0346 0.0284 0.0319
04:01-05:00, Thu., 25 Apr. 0.0336 0.0291 0.0315
03:01-04:00, Thu., 25 Apr. 0.0339 0.0300 0.0320
02:01-03:00, Thu., 25 Apr. 0.0343 0.0297 0.0321
01:01-02:00, Thu., 25 Apr. 0.0343 0.0297 0.0317
00:01-01:00, Thu., 25 Apr. 0.0352 0.0300 0.0324
23:01-24:00, Wed., 24 Apr. 0.0361 0.0307 0.0338
22:01-23:00, Wed., 24 Apr. 0.0390 0.0331 0.0351
21:01-22:00, Wed., 24 Apr. 0.0387 0.0337 0.0361
20:01-21:00, Wed., 24 Apr. 0.0405 0.0349 0.0377
19:01-20:00, Wed., 24 Apr. 0.0384 0.0340 0.0360
18:01-19:00, Wed., 24 Apr. 0.0372 0.0320 0.0341
17:01-18:00, Wed., 24 Apr. 0.0374 0.0325 0.0350
16:01-17:00, Wed., 24 Apr. 0.0380 0.0331 0.0352
15:01-16:00, Wed., 24 Apr. 0.0366 0.0317 0.0346
14:01-15:00, Wed., 24 Apr. 0.0366 0.0318 0.0339
13:01-14:00, Wed., 24 Apr. 0.0368 0.0323 0.0349
12:01-13:00, Wed., 24 Apr. 0.0384 0.0332 0.0358
11:01-12:00, Wed., 24 Apr. 0.0356 0.0313 0.0336
10:01-11:00, Wed., 24 Apr. 0.0352 0.0300 0.0327
09:01-10:00, Wed., 24 Apr. 0.0359 0.0316 0.0335
08:01-09:00, Wed., 24 Apr. 0.0356 0.0306 0.0332
07:01-08:00, Wed., 24 Apr. 0.0382 0.0318 0.0349
06:01-07:00, Wed., 24 Apr. 0.0420 0.0360 0.0387
05:01-06:00, Wed., 24 Apr. 0.0398 0.0325 0.0366
04:01-05:00, Wed., 24 Apr. 0.0349 0.0296 0.0322
03:01-04:00, Wed., 24 Apr. 0.0339 0.0293 0.0315
02:01-03:00, Wed., 24 Apr. 0.0349 0.0290 0.0314
01:01-02:00, Wed., 24 Apr. 0.0336 0.0293 0.0315
00:01-01:00, Wed., 24 Apr. 0.0334 0.0290 0.0313
23:01-24:00, Tue., 23 Apr. 0.0338 0.0301 0.0317
22:01-23:00, Tue., 23 Apr. 0.0335 0.0287 0.0314
21:01-22:00, Tue., 23 Apr. 0.0336 0.0294 0.0316
20:01-21:00, Tue., 23 Apr. 0.0345 0.0294 0.0316
19:01-20:00, Tue., 23 Apr. 0.0336 0.0295 0.0315
18:01-19:00, Tue., 23 Apr. 0.0342 0.0299 0.0319
17:01-18:00, Tue., 23 Apr. 0.0336 0.0293 0.0316
16:01-17:00, Tue., 23 Apr. 0.0335 0.0294 0.0315
15:01-16:00, Tue., 23 Apr. 0.0336 0.0298 0.0316
14:01-15:00, Tue., 23 Apr. 0.0345 0.0295 0.0315
13:01-14:00, Tue., 23 Apr. 0.0352 0.0292 0.0318
12:01-13:00, Tue., 23 Apr. 0.0344 0.0301 0.0320
11:01-12:00, Tue., 23 Apr. 0.0342 0.0294 0.0317
10:01-11:00, Tue., 23 Apr. 0.0332 0.0292 0.0314
09:01-10:00, Tue., 23 Apr. 0.0346 0.0290 0.0317
08:01-09:00, Tue., 23 Apr. 0.0343 0.0295 0.0318
07:01-08:00, Tue., 23 Apr. 0.0343 0.0296 0.0319
06:01-07:00, Tue., 23 Apr. 0.0339 0.0296 0.0318
05:01-06:00, Tue., 23 Apr. 0.0345 0.0292 0.0318
04:01-05:00, Tue., 23 Apr. 0.0343 0.0288 0.0319
03:01-04:00, Tue., 23 Apr. 0.0341 0.0290 0.0318
02:01-03:00, Tue., 23 Apr. 0.0332 0.0294 0.0315
01:01-02:00, Tue., 23 Apr. 0.0339 0.0291 0.0318
00:01-01:00, Tue., 23 Apr. 0.0344 0.0298 0.0317
23:01-24:00, Mon., 22 Apr. 0.0339 0.0295 0.0316
22:01-23:00, Mon., 22 Apr. 0.0345 0.0287 0.0318
21:01-22:00, Mon., 22 Apr. 0.0351 0.0292 0.0316
20:01-21:00, Mon., 22 Apr. 0.0336 0.0294 0.0316
19:01-20:00, Mon., 22 Apr. 0.0334 0.0291 0.0314
18:01-19:00, Mon., 22 Apr. 0.0337 0.0294 0.0316
17:01-18:00, Mon., 22 Apr. 0.0339 0.0293 0.0317
16:01-17:00, Mon., 22 Apr. 0.0335 0.0297 0.0313
15:01-16:00, Mon., 22 Apr. 0.0342 0.0294 0.0315
14:01-15:00, Mon., 22 Apr. 0.0336 0.0297 0.0316
13:01-14:00, Mon., 22 Apr. 0.0340 0.0286 0.0316
12:01-13:00, Mon., 22 Apr. 0.0339 0.0294 0.0319
11:01-12:00, Mon., 22 Apr. 0.0349 0.0311 0.0331
10:01-11:00, Mon., 22 Apr. 0.0372 0.0322 0.0344
09:01-10:00, Mon., 22 Apr. 0.0354 0.0290 0.0325
08:01-09:00, Mon., 22 Apr. 0.0360 0.0310 0.0334
07:01-08:00, Mon., 22 Apr. 0.0374 0.0308 0.0340
06:01-07:00, Mon., 22 Apr. 0.0434 0.0344 0.0381
05:01-06:00, Mon., 22 Apr. 0.0476 0.0388 0.0429
04:01-05:00, Mon., 22 Apr. 0.0461 0.0388 0.0424
03:01-04:00, Mon., 22 Apr. 0.0439 0.0382 0.0414
02:01-03:00, Mon., 22 Apr. 0.0450 0.0391 0.0425
01:01-02:00, Mon., 22 Apr. 0.0471 0.0400 0.0439
00:01-01:00, Mon., 22 Apr. 0.0476 0.0402 0.0441
23:01-24:00, Sun., 21 Apr. 0.0474 0.0409 0.0445
22:01-23:00, Sun., 21 Apr. 0.0461 0.0401 0.0435
21:01-22:00, Sun., 21 Apr. 0.0456 0.0416 0.0436
20:01-21:00, Sun., 21 Apr. 0.0465 0.0419 0.0439
19:01-20:00, Sun., 21 Apr. 0.0454 0.0394 0.0426
18:01-19:00, Sun., 21 Apr. 0.0402 0.0309 0.0345
17:01-18:00, Sun., 21 Apr. 0.0349 0.0304 0.0325
16:01-17:00, Sun., 21 Apr. 0.0346 0.0300 0.0324
15:01-16:00, Sun., 21 Apr. 0.0348 0.0300 0.0326
14:01-15:00, Sun., 21 Apr. 0.0362 0.0304 0.0326
13:01-14:00, Sun., 21 Apr. 0.0349 0.0309 0.0330
12:01-13:00, Sun., 21 Apr. 0.0353 0.0307 0.0329
11:01-12:00, Sun., 21 Apr. 0.0352 0.0306 0.0327
10:01-11:00, Sun., 21 Apr. 0.0346 0.0308 0.0326
09:01-10:00, Sun., 21 Apr. 0.0346 0.0304 0.0327
08:01-09:00, Sun., 21 Apr. 0.0345 0.0306 0.0328
07:01-08:00, Sun., 21 Apr. 0.0343 0.0308 0.0326
06:01-07:00, Sun., 21 Apr. 0.0345 0.0301 0.0324
05:01-06:00, Sun., 21 Apr. 0.0344 0.0293 0.0325
04:01-05:00, Sun., 21 Apr. 0.0353 0.0298 0.0326
03:01-04:00, Sun., 21 Apr. 0.0346 0.0293 0.0325
02:01-03:00, Sun., 21 Apr. 0.0351 0.0299 0.0326
01:01-02:00, Sun., 21 Apr. 0.0351 0.0301 0.0325
00:01-01:00, Sun., 21 Apr. 0.0363 0.0289 0.0324
23:01-24:00, Sat., 20 Apr. 0.0351 0.0311 0.0327
22:01-23:00, Sat., 20 Apr. 0.0347 0.0300 0.0323
21:01-22:00, Sat., 20 Apr. 0.0351 0.0290 0.0323
20:01-21:00, Sat., 20 Apr. 0.0353 0.0305 0.0326
19:01-20:00, Sat., 20 Apr. 0.0353 0.0310 0.0330
18:01-19:00, Sat., 20 Apr. 0.0347 0.0302 0.0328
17:01-18:00, Sat., 20 Apr. 0.0354 0.0310 0.0328
16:01-17:00, Sat., 20 Apr. 0.0347 0.0312 0.0329
15:01-16:00, Sat., 20 Apr. 0.0358 0.0308 0.0328
14:01-15:00, Sat., 20 Apr. 0.0355 0.0308 0.0330
13:01-14:00, Sat., 20 Apr. 0.0352 0.0306 0.0331
12:01-13:00, Sat., 20 Apr. 0.0349 0.0307 0.0332
11:01-12:00, Sat., 20 Apr. 0.0354 0.0308 0.0331
10:01-11:00, Sat., 20 Apr. 0.0363 0.0314 0.0332
09:01-10:00, Sat., 20 Apr. 0.0350 0.0303 0.0329
08:01-09:00, Sat., 20 Apr. 0.0358 0.0308 0.0331
07:01-08:00, Sat., 20 Apr. 0.0348 0.0314 0.0331
06:01-07:00, Sat., 20 Apr. 0.0350 0.0309 0.0329
05:01-06:00, Sat., 20 Apr. 0.0355 0.0304 0.0328
04:01-05:00, Sat., 20 Apr. 0.0352 0.0302 0.0327
03:01-04:00, Sat., 20 Apr. 0.0360 0.0301 0.0325
02:01-03:00, Sat., 20 Apr. 0.0346 0.0304 0.0327
01:01-02:00, Sat., 20 Apr. 0.0362 0.0295 0.0327
00:01-01:00, Sat., 20 Apr. 0.0356 0.0301 0.0324
23:01-24:00, Fri., 19 Apr. 0.0351 0.0300 0.0325
22:01-23:00, Fri., 19 Apr. 0.0351 0.0299 0.0325
21:01-22:00, Fri., 19 Apr. 0.0346 0.0296 0.0324
20:01-21:00, Fri., 19 Apr. 0.0340 0.0308 0.0324
19:01-20:00, Fri., 19 Apr. 0.0353 0.0301 0.0326
18:01-19:00, Fri., 19 Apr. 0.0356 0.0308 0.0328
17:01-18:00, Fri., 19 Apr. 0.0346 0.0292 0.0325
16:01-17:00, Fri., 19 Apr. 0.0352 0.0305 0.0331
15:01-16:00, Fri., 19 Apr. 0.0353 0.0302 0.0331
14:01-15:00, Fri., 19 Apr. 0.0348 0.0303 0.0328
13:01-14:00, Fri., 19 Apr. 0.0346 0.0304 0.0328
12:01-13:00, Fri., 19 Apr. 0.0348 0.0304 0.0326
11:01-12:00, Fri., 19 Apr. 0.0351 0.0305 0.0327
10:01-11:00, Fri., 19 Apr. 0.0350 0.0302 0.0329
09:01-10:00, Fri., 19 Apr. 0.0366 0.0308 0.0329
08:01-09:00, Fri., 19 Apr. 0.0353 0.0292 0.0324
07:01-08:00, Fri., 19 Apr. 0.0351 0.0302 0.0324
06:01-07:00, Fri., 19 Apr. 0.0349 0.0303 0.0329
05:01-06:00, Fri., 19 Apr. 0.0355 0.0308 0.0328
04:01-05:00, Fri., 19 Apr. 0.0367 0.0297 0.0329
03:01-04:00, Fri., 19 Apr. 0.0355 0.0308 0.0329
02:01-03:00, Fri., 19 Apr. 0.0361 0.0309 0.0328
01:01-02:00, Fri., 19 Apr. 0.0352 0.0303 0.0330
00:01-01:00, Fri., 19 Apr. 0.0360 0.0318 0.0336
23:01-24:00, Thu., 18 Apr. 0.0389 0.0335 0.0356
22:01-23:00, Thu., 18 Apr. 0.0412 0.0343 0.0384
21:01-22:00, Thu., 18 Apr. 0.0395 0.0337 0.0365
20:01-21:00, Thu., 18 Apr. 0.0398 0.0349 0.0368
19:01-20:00, Thu., 18 Apr. 0.0416 0.0353 0.0383
18:01-19:00, Thu., 18 Apr. 0.0426 0.0345 0.0377
17:01-18:00, Thu., 18 Apr. 0.0404 0.0310 0.0364
16:01-17:00, Thu., 18 Apr. 0.0353 0.0302 0.0329
15:01-16:00, Thu., 18 Apr. 0.0352 0.0301 0.0325
14:01-15:00, Thu., 18 Apr. 0.0356 0.0310 0.0330
13:01-14:00, Thu., 18 Apr. 0.0354 0.0301 0.0327
12:01-13:00, Thu., 18 Apr. 0.0348 0.0311 0.0330
11:01-12:00, Thu., 18 Apr. 0.0349 0.0306 0.0332
10:01-11:00, Thu., 18 Apr. 0.0357 0.0308 0.0332
09:01-10:00, Thu., 18 Apr. 0.0355 0.0304 0.0329
08:01-09:00, Thu., 18 Apr. 0.0346 0.0310 0.0331
07:01-08:00, Thu., 18 Apr. 0.0349 0.0315 0.0332
06:01-07:00, Thu., 18 Apr. 0.0351 0.0304 0.0329
05:01-06:00, Thu., 18 Apr. 0.0357 0.0306 0.0329
04:01-05:00, Thu., 18 Apr. 0.0345 0.0306 0.0326
03:01-04:00, Thu., 18 Apr. 0.0353 0.0307 0.0326
02:01-03:00, Thu., 18 Apr. 0.0346 0.0303 0.0322
01:01-02:00, Thu., 18 Apr. 0.0341 0.0304 0.0322
00:01-01:00, Thu., 18 Apr. 0.0344 0.0301 0.0322
23:01-24:00, Wed., 17 Apr. 0.0339 0.0290 0.0318
22:01-23:00, Wed., 17 Apr. 0.0355 0.0292 0.0322
21:01-22:00, Wed., 17 Apr. 0.0340 0.0294 0.0317
20:01-21:00, Wed., 17 Apr. 0.0345 0.0298 0.0320
19:01-20:00, Wed., 17 Apr. 0.0343 0.0300 0.0320
18:01-19:00, Wed., 17 Apr. 0.0351 0.0297 0.0323
17:01-18:00, Wed., 17 Apr. 0.0343 0.0304 0.0321
16:01-17:00, Wed., 17 Apr. 0.0346 0.0304 0.0325
15:01-16:00, Wed., 17 Apr. 0.0346 0.0305 0.0327
14:01-15:00, Wed., 17 Apr. 0.0352 0.0306 0.0323
13:01-14:00, Wed., 17 Apr. 0.0343 0.0294 0.0324
12:01-13:00, Wed., 17 Apr. 0.0341 0.0311 0.0325
11:01-12:00, Wed., 17 Apr. 0.0342 0.0301 0.0322
10:01-11:00, Wed., 17 Apr. 0.0346 0.0306 0.0323
09:01-10:00, Wed., 17 Apr. 0.0350 0.0301 0.0321
08:01-09:00, Wed., 17 Apr. 0.0348 0.0296 0.0321
07:01-08:00, Wed., 17 Apr. 0.0360 0.0295 0.0320
06:01-07:00, Wed., 17 Apr. 0.0346 0.0303 0.0324
05:01-06:00, Wed., 17 Apr. 0.0343 0.0299 0.0321
04:01-05:00, Wed., 17 Apr. 0.0349 0.0304 0.0324
03:01-04:00, Wed., 17 Apr. 0.0350 0.0299 0.0327
02:01-03:00, Wed., 17 Apr. 0.0355 0.0297 0.0323
01:01-02:00, Wed., 17 Apr. 0.0351 0.0302 0.0322
00:01-01:00, Wed., 17 Apr. 0.0343 0.0297 0.0322
23:01-24:00, Tue., 16 Apr. 0.0342 0.0301 0.0323
22:01-23:00, Tue., 16 Apr. 0.0341 0.0292 0.0319
21:01-22:00, Tue., 16 Apr. 0.0346 0.0292 0.0321
20:01-21:00, Tue., 16 Apr. 0.0338 0.0297 0.0319
19:01-20:00, Tue., 16 Apr. 0.0352 0.0295 0.0321
18:01-19:00, Tue., 16 Apr. 0.0341 0.0294 0.0318
17:01-18:00, Tue., 16 Apr. 0.0341 0.0294 0.0319
16:01-17:00, Tue., 16 Apr. 0.0341 0.0298 0.0321
15:01-16:00, Tue., 16 Apr. 0.0342 0.0295 0.0320
14:01-15:00, Tue., 16 Apr. 0.0339 0.0294 0.0320
13:01-14:00, Tue., 16 Apr. 0.0343 0.0288 0.0321
12:01-13:00, Tue., 16 Apr. 0.0340 0.0294 0.0321
11:01-12:00, Tue., 16 Apr. 0.0341 0.0292 0.0319
10:01-11:00, Tue., 16 Apr. 0.0341 0.0301 0.0320
09:01-10:00, Tue., 16 Apr. 0.0339 0.0290 0.0317
08:01-09:00, Tue., 16 Apr. 0.0343 0.0295 0.0316
07:01-08:00, Tue., 16 Apr. 0.0339 0.0293 0.0315
06:01-07:00, Tue., 16 Apr. 0.0341 0.0294 0.0317
05:01-06:00, Tue., 16 Apr. 0.0337 0.0295 0.0318
04:01-05:00, Tue., 16 Apr. 0.0336 0.0297 0.0318
03:01-04:00, Tue., 16 Apr. 0.0345 0.0297 0.0319
02:01-03:00, Tue., 16 Apr. 0.0343 0.0296 0.0317
01:01-02:00, Tue., 16 Apr. 0.0344 0.0290 0.0317
00:01-01:00, Tue., 16 Apr. 0.0348 0.0294 0.0317
23:01-24:00, Mon., 15 Apr. 0.0334 0.0299 0.0316
22:01-23:00, Mon., 15 Apr. 0.0333 0.0290 0.0315
21:01-22:00, Mon., 15 Apr. 0.0336 0.0290 0.0315
20:01-21:00, Mon., 15 Apr. 0.0343 0.0301 0.0317
19:01-20:00, Mon., 15 Apr. 0.0342 0.0295 0.0316
18:01-19:00, Mon., 15 Apr. 0.0348 0.0283 0.0318
17:01-18:00, Mon., 15 Apr. 0.0341 0.0300 0.0318
16:01-17:00, Mon., 15 Apr. 0.0347 0.0292 0.0319
15:01-16:00, Mon., 15 Apr. 0.0342 0.0295 0.0318
14:01-15:00, Mon., 15 Apr. 0.0344 0.0296 0.0321
13:01-14:00, Mon., 15 Apr. 0.0341 0.0297 0.0320