Measurement results by the hour (Chofu) 7 Sep., 2026 - 13 Sep., 2026
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 | |
| 23:01-24:00, Sun., 13 Sep. | 0.0240 | 0.0206 | 0.0223 |
| 22:01-23:00, Sun., 13 Sep. | 0.0256 | 0.0200 | 0.0226 |
| 21:01-22:00, Sun., 13 Sep. | 0.0237 | 0.0204 | 0.0222 |
| 20:01-21:00, Sun., 13 Sep. | 0.0238 | 0.0208 | 0.0225 |
| 19:01-20:00, Sun., 13 Sep. | 0.0257 | 0.0210 | 0.0225 |
| 18:01-19:00, Sun., 13 Sep. | 0.0240 | 0.0210 | 0.0225 |
| 17:01-18:00, Sun., 13 Sep. | 0.0245 | 0.0206 | 0.0226 |
| 16:01-17:00, Sun., 13 Sep. | 0.0245 | 0.0214 | 0.0228 |
| 15:01-16:00, Sun., 13 Sep. | 0.0246 | 0.0205 | 0.0227 |
| 14:01-15:00, Sun., 13 Sep. | 0.0244 | 0.0207 | 0.0226 |
| 13:01-14:00, Sun., 13 Sep. | 0.0254 | 0.0202 | 0.0227 |
| 12:01-13:00, Sun., 13 Sep. | 0.0245 | 0.0203 | 0.0226 |
| 11:01-12:00, Sun., 13 Sep. | 0.0251 | 0.0211 | 0.0227 |
| 10:01-11:00, Sun., 13 Sep. | 0.0248 | 0.0213 | 0.0226 |
| 09:01-10:00, Sun., 13 Sep. | 0.0249 | 0.0201 | 0.0226 |
| 08:01-09:00, Sun., 13 Sep. | 0.0242 | 0.0202 | 0.0227 |
| 07:01-08:00, Sun., 13 Sep. | 0.0249 | 0.0205 | 0.0230 |
| 06:01-07:00, Sun., 13 Sep. | 0.0259 | 0.0214 | 0.0230 |
| 05:01-06:00, Sun., 13 Sep. | 0.0247 | 0.0203 | 0.0227 |
| 04:01-05:00, Sun., 13 Sep. | 0.0246 | 0.0212 | 0.0227 |
| 03:01-04:00, Sun., 13 Sep. | 0.0240 | 0.0207 | 0.0225 |
| 02:01-03:00, Sun., 13 Sep. | 0.0244 | 0.0209 | 0.0226 |
| 01:01-02:00, Sun., 13 Sep. | 0.0255 | 0.0206 | 0.0224 |
| 00:01-01:00, Sun., 13 Sep. | 0.0243 | 0.0208 | 0.0224 |
| 23:01-24:00, Sat., 12 Sep. | 0.0242 | 0.0200 | 0.0226 |
| 22:01-23:00, Sat., 12 Sep. | 0.0235 | 0.0210 | 0.0224 |
| 21:01-22:00, Sat., 12 Sep. | 0.0236 | 0.0200 | 0.0223 |
| 20:01-21:00, Sat., 12 Sep. | 0.0240 | 0.0203 | 0.0221 |
| 19:01-20:00, Sat., 12 Sep. | 0.0244 | 0.0200 | 0.0223 |
| 18:01-19:00, Sat., 12 Sep. | 0.0246 | 0.0209 | 0.0225 |
| 17:01-18:00, Sat., 12 Sep. | 0.0249 | 0.0207 | 0.0228 |
| 16:01-17:00, Sat., 12 Sep. | 0.0249 | 0.0202 | 0.0228 |
| 15:01-16:00, Sat., 12 Sep. | 0.0247 | 0.0209 | 0.0227 |
| 14:01-15:00, Sat., 12 Sep. | 0.0247 | 0.0210 | 0.0227 |
| 13:01-14:00, Sat., 12 Sep. | 0.0242 | 0.0211 | 0.0226 |
| 12:01-13:00, Sat., 12 Sep. | 0.0244 | 0.0207 | 0.0225 |
| 11:01-12:00, Sat., 12 Sep. | 0.0250 | 0.0211 | 0.0226 |
| 10:01-11:00, Sat., 12 Sep. | 0.0254 | 0.0212 | 0.0232 |
| 09:01-10:00, Sat., 12 Sep. | 0.0260 | 0.0224 | 0.0244 |
| 08:01-09:00, Sat., 12 Sep. | 0.0298 | 0.0242 | 0.0262 |
| 07:01-08:00, Sat., 12 Sep. | 0.0306 | 0.0257 | 0.0285 |
| 06:01-07:00, Sat., 12 Sep. | 0.0314 | 0.0250 | 0.0283 |
| 05:01-06:00, Sat., 12 Sep. | 0.0298 | 0.0260 | 0.0277 |
| 04:01-05:00, Sat., 12 Sep. | 0.0301 | 0.0263 | 0.0284 |
| 03:01-04:00, Sat., 12 Sep. | 0.0320 | 0.0270 | 0.0293 |
| 02:01-03:00, Sat., 12 Sep. | 0.0315 | 0.0266 | 0.0293 |
| 01:01-02:00, Sat., 12 Sep. | 0.0332 | 0.0285 | 0.0305 |
| 00:01-01:00, Sat., 12 Sep. | 0.0330 | 0.0251 | 0.0296 |
| 23:01-24:00, Fri., 11 Sep. | 0.0279 | 0.0232 | 0.0256 |
| 22:01-23:00, Fri., 11 Sep. | 0.0253 | 0.0221 | 0.0236 |
| 21:01-22:00, Fri., 11 Sep. | 0.0249 | 0.0210 | 0.0230 |
| 20:01-21:00, Fri., 11 Sep. | 0.0246 | 0.0210 | 0.0229 |
| 19:01-20:00, Fri., 11 Sep. | 0.0241 | 0.0203 | 0.0227 |
| 18:01-19:00, Fri., 11 Sep. | 0.0247 | 0.0210 | 0.0227 |
| 17:01-18:00, Fri., 11 Sep. | 0.0244 | 0.0208 | 0.0227 |
| 16:01-17:00, Fri., 11 Sep. | 0.0247 | 0.0213 | 0.0227 |
| 15:01-16:00, Fri., 11 Sep. | 0.0245 | 0.0206 | 0.0225 |
| 14:01-15:00, Fri., 11 Sep. | 0.0245 | 0.0206 | 0.0226 |
| 13:01-14:00, Fri., 11 Sep. | 0.0249 | 0.0207 | 0.0230 |
| 12:01-13:00, Fri., 11 Sep. | 0.0253 | 0.0210 | 0.0228 |
| 11:01-12:00, Fri., 11 Sep. | 0.0250 | 0.0212 | 0.0231 |
| 10:01-11:00, Fri., 11 Sep. | 0.0285 | 0.0221 | 0.0252 |
| 09:01-10:00, Fri., 11 Sep. | 0.0297 | 0.0242 | 0.0274 |
| 08:01-09:00, Fri., 11 Sep. | 0.0298 | 0.0253 | 0.0271 |
| 07:01-08:00, Fri., 11 Sep. | 0.0303 | 0.0263 | 0.0285 |
| 06:01-07:00, Fri., 11 Sep. | 0.0342 | 0.0273 | 0.0312 |
| 05:01-06:00, Fri., 11 Sep. | 0.0339 | 0.0266 | 0.0304 |
| 04:01-05:00, Fri., 11 Sep. | 0.0290 | 0.0250 | 0.0272 |
| 03:01-04:00, Fri., 11 Sep. | 0.0276 | 0.0233 | 0.0257 |
| 02:01-03:00, Fri., 11 Sep. | 0.0253 | 0.0213 | 0.0233 |
| 01:01-02:00, Fri., 11 Sep. | 0.0256 | 0.0214 | 0.0234 |
| 00:01-01:00, Fri., 11 Sep. | 0.0285 | 0.0219 | 0.0254 |
| 23:01-24:00, Thu., 10 Sep. | 0.0290 | 0.0247 | 0.0272 |
| 22:01-23:00, Thu., 10 Sep. | 0.0294 | 0.0255 | 0.0277 |
| 21:01-22:00, Thu., 10 Sep. | 0.0285 | 0.0238 | 0.0257 |
| 20:01-21:00, Thu., 10 Sep. | 0.0280 | 0.0240 | 0.0264 |
| 19:01-20:00, Thu., 10 Sep. | 0.0291 | 0.0254 | 0.0272 |
| 18:01-19:00, Thu., 10 Sep. | 0.0316 | 0.0258 | 0.0286 |
| 17:01-18:00, Thu., 10 Sep. | 0.0323 | 0.0262 | 0.0298 |
| 16:01-17:00, Thu., 10 Sep. | 0.0273 | 0.0215 | 0.0240 |
| 15:01-16:00, Thu., 10 Sep. | 0.0247 | 0.0210 | 0.0228 |
| 14:01-15:00, Thu., 10 Sep. | 0.0241 | 0.0212 | 0.0227 |
| 13:01-14:00, Thu., 10 Sep. | 0.0248 | 0.0213 | 0.0230 |
| 12:01-13:00, Thu., 10 Sep. | 0.0256 | 0.0213 | 0.0234 |
| 11:01-12:00, Thu., 10 Sep. | 0.0282 | 0.0227 | 0.0253 |
| 10:01-11:00, Thu., 10 Sep. | 0.0277 | 0.0224 | 0.0254 |
| 09:01-10:00, Thu., 10 Sep. | 0.0256 | 0.0219 | 0.0238 |
| 08:01-09:00, Thu., 10 Sep. | 0.0252 | 0.0217 | 0.0235 |
| 07:01-08:00, Thu., 10 Sep. | 0.0252 | 0.0218 | 0.0236 |
| 06:01-07:00, Thu., 10 Sep. | 0.0245 | 0.0213 | 0.0231 |
| 05:01-06:00, Thu., 10 Sep. | 0.0245 | 0.0213 | 0.0230 |
| 04:01-05:00, Thu., 10 Sep. | 0.0256 | 0.0216 | 0.0237 |
| 03:01-04:00, Thu., 10 Sep. | 0.0301 | 0.0231 | 0.0267 |
| 02:01-03:00, Thu., 10 Sep. | 0.0328 | 0.0269 | 0.0299 |
| 01:01-02:00, Thu., 10 Sep. | 0.0362 | 0.0287 | 0.0321 |
| 00:01-01:00, Thu., 10 Sep. | 0.0358 | 0.0311 | 0.0333 |
| 23:01-24:00, Wed., 09 Sep. | 0.0417 | 0.0315 | 0.0372 |
| 22:01-23:00, Wed., 09 Sep. | 0.0427 | 0.0355 | 0.0390 |
| 21:01-22:00, Wed., 09 Sep. | 0.0367 | 0.0298 | 0.0326 |
| 20:01-21:00, Wed., 09 Sep. | 0.0410 | 0.0319 | 0.0368 |
| 19:01-20:00, Wed., 09 Sep. | 0.0376 | 0.0256 | 0.0328 |
| 18:01-19:00, Wed., 09 Sep. | 0.0269 | 0.0225 | 0.0246 |
| 17:01-18:00, Wed., 09 Sep. | 0.0250 | 0.0222 | 0.0237 |
| 16:01-17:00, Wed., 09 Sep. | 0.0269 | 0.0215 | 0.0242 |
| 15:01-16:00, Wed., 09 Sep. | 0.0266 | 0.0219 | 0.0241 |
| 14:01-15:00, Wed., 09 Sep. | 0.0255 | 0.0212 | 0.0232 |
| 13:01-14:00, Wed., 09 Sep. | 0.0241 | 0.0206 | 0.0226 |
| 12:01-13:00, Wed., 09 Sep. | 0.0245 | 0.0207 | 0.0228 |
| 11:01-12:00, Wed., 09 Sep. | 0.0244 | 0.0214 | 0.0227 |
| 10:01-11:00, Wed., 09 Sep. | 0.0248 | 0.0207 | 0.0225 |
| 09:01-10:00, Wed., 09 Sep. | 0.0246 | 0.0209 | 0.0225 |
| 08:01-09:00, Wed., 09 Sep. | 0.0247 | 0.0208 | 0.0226 |
| 07:01-08:00, Wed., 09 Sep. | 0.0244 | 0.0211 | 0.0226 |
| 06:01-07:00, Wed., 09 Sep. | 0.0246 | 0.0201 | 0.0226 |
| 05:01-06:00, Wed., 09 Sep. | 0.0249 | 0.0209 | 0.0226 |
| 04:01-05:00, Wed., 09 Sep. | 0.0242 | 0.0203 | 0.0224 |
| 03:01-04:00, Wed., 09 Sep. | 0.0243 | 0.0206 | 0.0226 |
| 02:01-03:00, Wed., 09 Sep. | 0.0238 | 0.0210 | 0.0225 |
| 01:01-02:00, Wed., 09 Sep. | 0.0263 | 0.0211 | 0.0239 |
| 00:01-01:00, Wed., 09 Sep. | 0.0313 | 0.0228 | 0.0275 |
| 23:01-24:00, Tue., 08 Sep. | 0.0419 | 0.0304 | 0.0347 |
| 22:01-23:00, Tue., 08 Sep. | 0.0585 | 0.0408 | 0.0507 |
| 21:01-22:00, Tue., 08 Sep. | 0.0561 | 0.0438 | 0.0492 |
| 20:01-21:00, Tue., 08 Sep. | 0.0466 | 0.0286 | 0.0369 |
| 19:01-20:00, Tue., 08 Sep. | 0.0286 | 0.0226 | 0.0254 |
| 18:01-19:00, Tue., 08 Sep. | 0.0285 | 0.0231 | 0.0257 |
| 17:01-18:00, Tue., 08 Sep. | 0.0297 | 0.0254 | 0.0272 |
| 16:01-17:00, Tue., 08 Sep. | 0.0294 | 0.0218 | 0.0259 |
| 15:01-16:00, Tue., 08 Sep. | 0.0247 | 0.0210 | 0.0228 |
| 14:01-15:00, Tue., 08 Sep. | 0.0247 | 0.0211 | 0.0229 |
| 13:01-14:00, Tue., 08 Sep. | 0.0256 | 0.0213 | 0.0230 |
| 12:01-13:00, Tue., 08 Sep. | 0.0257 | 0.0212 | 0.0233 |
| 11:01-12:00, Tue., 08 Sep. | 0.0249 | 0.0207 | 0.0229 |
| 10:01-11:00, Tue., 08 Sep. | 0.0250 | 0.0208 | 0.0229 |
| 09:01-10:00, Tue., 08 Sep. | 0.0251 | 0.0209 | 0.0229 |
| 08:01-09:00, Tue., 08 Sep. | 0.0247 | 0.0208 | 0.0228 |
| 07:01-08:00, Tue., 08 Sep. | 0.0249 | 0.0213 | 0.0231 |
| 06:01-07:00, Tue., 08 Sep. | 0.0262 | 0.0220 | 0.0238 |
| 05:01-06:00, Tue., 08 Sep. | 0.0250 | 0.0217 | 0.0233 |
| 04:01-05:00, Tue., 08 Sep. | 0.0262 | 0.0210 | 0.0234 |
| 03:01-04:00, Tue., 08 Sep. | 0.0267 | 0.0228 | 0.0246 |
| 02:01-03:00, Tue., 08 Sep. | 0.0269 | 0.0212 | 0.0239 |
| 01:01-02:00, Tue., 08 Sep. | 0.0251 | 0.0212 | 0.0231 |
| 00:01-01:00, Tue., 08 Sep. | 0.0255 | 0.0215 | 0.0235 |
| 23:01-24:00, Mon., 07 Sep. | 0.0259 | 0.0225 | 0.0238 |
| 22:01-23:00, Mon., 07 Sep. | 0.0249 | 0.0215 | 0.0232 |
| 21:01-22:00, Mon., 07 Sep. | 0.0263 | 0.0210 | 0.0232 |
| 20:01-21:00, Mon., 07 Sep. | 0.0249 | 0.0214 | 0.0233 |
| 19:01-20:00, Mon., 07 Sep. | 0.0257 | 0.0217 | 0.0237 |
| 18:01-19:00, Mon., 07 Sep. | 0.0252 | 0.0217 | 0.0237 |
| 17:01-18:00, Mon., 07 Sep. | 0.0285 | 0.0230 | 0.0255 |
| 16:01-17:00, Mon., 07 Sep. | 0.0329 | 0.0264 | 0.0289 |
| 15:01-16:00, Mon., 07 Sep. | 0.0308 | 0.0251 | 0.0278 |
| 14:01-15:00, Mon., 07 Sep. | 0.0301 | 0.0262 | 0.0285 |
| 13:01-14:00, Mon., 07 Sep. | 0.0304 | 0.0250 | 0.0275 |
| 12:01-13:00, Mon., 07 Sep. | 0.0280 | 0.0232 | 0.0257 |
| 11:01-12:00, Mon., 07 Sep. | 0.0269 | 0.0238 | 0.0254 |
| 10:01-11:00, Mon., 07 Sep. | 0.0259 | 0.0222 | 0.0238 |
| 09:01-10:00, Mon., 07 Sep. | 0.0272 | 0.0224 | 0.0246 |
| 08:01-09:00, Mon., 07 Sep. | 0.0304 | 0.0244 | 0.0272 |
| 07:01-08:00, Mon., 07 Sep. | 0.0310 | 0.0236 | 0.0270 |
| 06:01-07:00, Mon., 07 Sep. | 0.0297 | 0.0245 | 0.0269 |
| 05:01-06:00, Mon., 07 Sep. | 0.0296 | 0.0263 | 0.0281 |
| 04:01-05:00, Mon., 07 Sep. | 0.0310 | 0.0266 | 0.0284 |
| 03:01-04:00, Mon., 07 Sep. | 0.0339 | 0.0275 | 0.0308 |
| 02:01-03:00, Mon., 07 Sep. | 0.0347 | 0.0304 | 0.0326 |
| 01:01-02:00, Mon., 07 Sep. | 0.0348 | 0.0297 | 0.0320 |
| 00:01-01:00, Mon., 07 Sep. | 0.0337 | 0.0281 | 0.0312 |