Station list Japan - absorbed dose rate
A - Z
Date| < Vmax | < 10 * Vmax | < 100 * Vmax | > 100 * Vmax |
| Stations: 357 | Date UTC | Radiation μGy/h |
Vmin ~ Vmax μGy/h |
| Tochigi | 2011-04-10 17:00 | 0.074 | 0.03~0.067 |
| Osaka | 2011-04-10 17:00 | 0.042 | 0.042~0.061 |
| Toyama | 2011-04-10 17:00 | 0.048 | 0.029~0.147 |
| Tokyo | 2011-04-10 17:00 | 0.083 | 0.028~0.079 |
| Gunma | 2011-04-10 17:00 | 0.041 | 0.017~0.045 |
| Hiroshima | 2011-04-10 17:00 | 0.046 | 0.035~0.069 |
| Hyogo | 2011-04-10 17:00 | 0.037 | 0.035~0.076 |
| kanagawa | 2011-04-10 17:00 | 0.058 | 0.035~0.069 |
| Kumamoto | 2011-04-10 17:00 | 0.027 | 0.021~0.067 |
| Saitama | 2011-04-10 17:00 | 0.064 | 0.031~0.06 |
| Ibaraki | 2011-04-10 17:00 | 0.147 | 0.036~0.056 |
| Chiba | 2011-04-10 17:00 | 0.056 | 0.022~0.044 |
| Radiation dose at Tsukidatemachi kamitedo, Date | 2011-05-09 16:35 | 2.000 | 0.114 (Japan mean) |
| Radiation dose at Date city office, Date | 2011-05-09 16:35 | 1.410 | 0.114 (Japan mean) |
| Radiation dose at Motomiya city office, Motomiya | 2011-05-10 10:05 | 0.920 | 0.114 (Japan mean) |
| Fukushima [6] (distance from Fukushima I: 45 km) | 2011-05-13 11:39 | 0.800 | 0.037~0.071 |
| Fukushima [12] (distance from Fukushima I: 40 km) | 2011-05-15 13:23 | 0.300 | 0.037~0.071 |
| Fukushima [77] (distance from Fukushima I: 25 km) | 2011-05-22 13:01 | 1.300 | 0.037~0.071 |
| Fukushima [74] (distance from Fukushima I: 35 km) | 2011-06-16 10:52 | 0.200 | 0.037~0.071 |
| Fukushima [35] (distance from Fukushima I: 35 km) | 2011-06-16 13:13 | 1.000 | 0.037~0.071 |
| Radiation dose at Iwane Fureai Plaza, Motomiya | 2011-07-13 14:16 | 1.180 | 0.114 (Japan mean) |
| Radiation dose at JAEA Oarai (P6) | 2011-07-14 13:36 | 0.123 | 0.114 (Japan mean) |
| Radiation dose in Iwanuma | 2011-07-14 13:36 | 0.190 | 0.114 (Japan mean) |
| Radiation dose at JAEA Oarai (P13) | 2011-07-14 13:36 | 0.232 | 0.114 (Japan mean) |
| Radiation dose at JAEA Oarai (P16) | 2011-07-14 13:36 | 0.176 | 0.114 (Japan mean) |
| Radiation dose at Ose administration center, Koriyama | 2011-07-14 13:36 | 0.560 | 0.114 (Japan mean) |
| Radiation dose at Agricultural center, Koriyama | 2011-07-14 13:36 | 1.080 | 0.114 (Japan mean) |
| Radiation dose at Shirasawa branch office, Motomiya | 2011-07-14 13:36 | 0.690 | 0.114 (Japan mean) |
| Radiation dose in Tukahama, Ojika | 2011-07-14 13:36 | 0.074 | 0.114 (Japan mean) |
| Radiation dose in Onagawa (MP-3) | 2011-07-14 13:36 | 0.091 | 0.114 (Japan mean) |
| Radiation dose at JAEA Oarai (P1) | 2011-07-14 13:36 | 0.190 | 0.114 (Japan mean) |
| Radiation dose in Yamamoto | 2011-07-14 13:36 | 0.260 | 0.114 (Japan mean) |
| Radiation dose at JAEA Oarai (P5) | 2011-07-14 13:36 | 0.169 | 0.114 (Japan mean) |
| Radiation dose in Natori | 2011-07-14 13:36 | 0.130 | 0.114 (Japan mean) |
| Radiation dose at JAEA Oarai (P12) | 2011-07-14 13:36 | 0.429 | 0.114 (Japan mean) |
| Radiation dose at JAEA Oarai (P15) | 2011-07-14 13:36 | 0.243 | 0.114 (Japan mean) |
| Radiation dose at Tamokami elementary school, Koriyama | 2011-07-14 13:36 | 0.210 | 0.114 (Japan mean) |
| Radiation dose at Koriyama city office, Koriyama | 2011-07-14 13:36 | 0.930 | 0.114 (Japan mean) |
| Radiation dose in Enoshima, Ojika | 2011-07-14 13:36 | 0.064 | 0.114 (Japan mean) |
| Radiation dose in Koyadori, Ojika | 2011-07-14 13:36 | 0.075 | 0.114 (Japan mean) |
| Radiation via www.houshasen-pref-ibaraki.jp (unofficial information) | 2011-07-14 13:36 | 0.124 | 0.114 (Japan mean) |
| Radiation via www.houshasen-pref-ibaraki.jp (unofficial information) | 2011-07-14 13:36 | 0.123 | 0.114 (Japan mean) |
| Radiation dose in Onagawa (MP-2) | 2011-07-14 13:36 | 0.160 | 0.114 (Japan mean) |
| Radiation dose in Marumori | 2011-07-14 13:36 | 0.090 | 0.114 (Japan mean) |
| Radiation dose at JAEA Oarai (P7) | 2011-07-14 13:36 | 0.270 | 0.114 (Japan mean) |
| Radiation dose in Watari | 2011-07-14 13:36 | 0.230 | 0.114 (Japan mean) |
| Radiation dose at JAEA Oarai (P11) | 2011-07-14 13:36 | 0.448 | 0.114 (Japan mean) |
| Radiation dose at JAEA Oarai (P14) | 2011-07-14 13:36 | 0.238 | 0.114 (Japan mean) |
| Radiation dose at Big palette Fukushima, Koriyama | 2011-07-14 13:36 | 0.510 | 0.114 (Japan mean) |
| Radiation dose at Koriyama joint government building, Koriyama | 2011-07-14 13:36 | 1.090 | 0.114 (Japan mean) |
| Radiation dose in Terama, Ojika | 2011-07-14 13:36 | 0.068 | 0.114 (Japan mean) |
| Radiation dose in Onagawa (MP-6) | 2011-07-14 13:36 | 0.110 | 0.114 (Japan mean) |
| Radiation via www.houshasen-pref-ibaraki.jp (unofficial information) | 2011-07-14 13:36 | 0.077 | 0.114 (Japan mean) |
| Radiation via www.houshasen-pref-ibaraki.jp (unofficial information) | 2011-07-14 13:36 | 0.127 | 0.114 (Japan mean) |
| Radiation dose in Onagawa (MP-1) | 2011-07-14 13:36 | 0.100 | 0.114 (Japan mean) |
| Radiation dose in Kakuda | 2011-07-14 13:36 | 0.260 | 0.114 (Japan mean) |
| Radiation via www.houshasen-pref-ibaraki.jp (unofficial information) | 2011-07-14 13:37 | 0.157 | 0.114 (Japan mean) |
| Radiation at Tamaki-cho Mie Japan | 2011-07-25 09:33 | 0.040 | 0.114 (Japan mean) |
| Fukushima [51] (distance from Fukushima I: 40 km) | 2011-08-12 14:20 | 0.200 | 0.037~0.071 |
| Fukushima [61] (distance from Fukushima I: 40 km) | 2011-08-12 14:41 | 3.500 | 0.037~0.071 |
| Fukushima [62] (distance from Fukushima I: 40 km) | 2011-08-12 14:50 | 4.500 | 0.037~0.071 |
| Fukushima [52] (distance from Fukushima I: 40 km) | 2011-08-12 15:05 | 0.200 | 0.037~0.071 |
| Fukushima [63] (distance from Fukushima I: 45 km) | 2011-08-12 15:14 | 1.200 | 0.037~0.071 |
| Fukuoka | 2011-08-18 09:00 | 0.036 | 0.034~0.079 |
| Kagawa | 2011-08-18 09:00 | 0.054 | 0.051~0.077 |
| Akita | 2011-08-18 09:00 | 0.060 | 0.022~0.086 |
| Okayama | 2011-08-18 09:00 | 0.049 | 0.043~0.104 |
| Aomori | 2011-08-18 09:00 | 0.029 | 0.017~0.102 |
| Shiga | 2011-08-18 09:00 | 0.033 | 0.031~0.061 |
| Shizuoka | 2011-08-18 09:00 | 0.040 | 0.0281~0.0765 |
| Yamanashi | 2011-08-18 09:00 | 0.047 | 0.04~0.064 |
| Miyazaki | 2011-08-18 09:00 | 0.026 | 0.0243~0.0664 |
| Nagasaki | 2011-08-18 09:00 | 0.028 | 0.027~0.069 |
| Kochi | 2011-08-18 09:00 | 0.027 | 0.023~0.076 |
| Yamagata | 2011-08-18 09:00 | 0.044 | 0.025~0.082 |
| Tokushima | 2011-08-18 09:00 | 0.040 | 0.037~0.067 |
| Iwate | 2011-08-18 09:00 | 0.045 | 0.014~0.084 |
| Shimane | 2011-08-18 09:00 | 0.065 | 0.036~0.11 |
| Aichi | 2011-08-18 09:00 | 0.042 | 0.035~0.074 |
| Nagano | 2011-08-18 09:00 | 0.042 | 0.0299~0.0974 |
| Ishikawa | 2011-08-18 09:00 | 0.049 | 0.0291~0.1275 |
| Ehime | 2011-08-18 09:00 | 0.048 | 0.045~0.074 |
| Yamaguchi | 2011-08-18 09:00 | 0.092 | 0.084~0.128 |
| Hokkaido | 2011-08-18 09:00 | 0.030 | 0.02~0.105 |
| Tottori | 2011-08-18 09:00 | 0.041 | 0.033~0.079 |
| Nara | 2011-08-18 09:00 | 0.050 | 0.046~0.08 |
| Kyoto | 2011-08-18 09:00 | 0.038 | 0.033~0.087 |
| Mie | 2011-08-18 09:00 | 0.046 | 0.0416~0.0789 |
| Fukui | 2011-08-18 09:00 | 0.045 | 0.032~0.097 |
| Niigata | 2011-08-18 09:00 | 0.047 | 0.031~0.153 |
| Okinawa | 2011-08-29 09:00 | 0.024 | 0.0133~0.0575 |
| Saga | 2011-08-29 09:00 | 0.040 | 0.037~0.086 |
| Gifu | 2011-08-29 09:00 | 0.062 | 0.057~0.11 |
| Oita | 2011-08-29 09:00 | 0.050 | 0.048~0.085 |
| Kagoshima | 2011-09-01 09:00 | 0.036 | 0.0306~0.0943 |
| Wakayama | 2011-09-05 09:00 | 0.031 | 0.031~0.056 |
| Sendai (Miyagi) | 2011-09-07 09:00 | 0.060 | 0.0176~0.0513 |
| Fukushima [42] (distance from Fukushima I: 30 km) | 2011-09-28 08:36 | 0.700 | 0.037~0.071 |
| Fukushima [4] (distance from Fukushima I: 50 km) | 2011-09-28 09:02 | 0.700 | 0.037~0.071 |
| Fukushima [2] (distance from Fukushima I: 55 km) | 2011-09-28 09:05 | 1.200 | 0.037~0.071 |
| Fukushima [46] (distance from Fukushima I: 20 km) | 2011-09-28 09:15 | 4.300 | 0.037~0.071 |
| Fukushima [13] (distance from Fukushima I: 40 km) | 2011-09-28 09:39 | 0.200 | 0.037~0.071 |
| Fukushima [41] (distance from Fukushima I: 20 km) | 2011-09-28 09:49 | 0.500 | 0.037~0.071 |
| Fukushima [14] (distance from Fukushima I: 35 km) | 2011-09-28 09:53 | 0.200 | 0.037~0.071 |
| Fukushima [33] (distance from Fukushima I: 30 km) | 2011-09-28 09:53 | 12.500 | 0.037~0.071 |
| Fukushima [15] (distance from Fukushima I: 35 km) | 2011-09-28 10:04 | 0.500 | 0.037~0.071 |
| Fukushima [3] (distance from Fukushima I: 45 km) | 2011-09-28 10:06 | 2.000 | 0.037~0.071 |
| Fukushima [32] (distance from Fukushima I: 30 km) | 2011-09-28 10:33 | 16.100 | 0.037~0.071 |
| Fukushima [5] (distance from Fukushima I: 45 km) | 2011-09-28 10:44 | 0.300 | 0.037~0.071 |
| Fukushima [10] (distance from Fukushima I: 40 km) | 2011-09-28 10:46 | 0.500 | 0.037~0.071 |
| Fukushima [31] (distance from Fukushima I: 30 km) | 2011-09-28 10:51 | 6.100 | 0.037~0.071 |
| Fukushima [79] (distance from Fukushima I: 40 km) | 2011-09-28 10:58 | 7.300 | 0.037~0.071 |
| Fukushima [7] (distance from Fukushima I: 45 km) | 2011-09-28 11:07 | 0.500 | 0.037~0.071 |
| Fukushima [76] (distance from Fukushima I: 25 km) | 2011-09-28 11:12 | 0.300 | 0.037~0.071 |
| Fukushima [43] (distance from Fukushima I: 20 km) | 2011-09-28 11:21 | 0.500 | 0.037~0.071 |
| Fukushima [73] (distance from Fukushima I: 35 km) | 2011-09-28 11:21 | 0.400 | 0.037~0.071 |
| Fukushima [34] (distance from Fukushima I: 30 km) | 2011-09-28 11:24 | 4.400 | 0.037~0.071 |
| Fukushima [72] (distance from Fukushima I: 30 km) | 2011-09-28 11:33 | 0.300 | 0.037~0.071 |
| Fukushima [21] (distance from Fukushima I: 30 km) | 2011-09-28 11:45 | 1.800 | 0.037~0.071 |
| Fukushima [71] (distance from Fukushima I: 25 km) | 2011-09-28 11:50 | 0.400 | 0.037~0.071 |
| Fukushima [22] (distance from Fukushima I: 35 km) | 2011-09-28 11:53 | 0.300 | 0.037~0.071 |
| Fukushima [23] (distance from Fukushima I: 35 km) | 2011-09-28 12:02 | 0.500 | 0.037~0.071 |
| Fukushima [20] (distance from Fukushima I: 45 km) | 2011-09-28 12:09 | 0.400 | 0.037~0.071 |
| Fukushima [44] (distance from Fukushima I: 30 km) | 2011-09-28 13:09 | 0.200 | 0.037~0.071 |
| Fukushima [1] (distance from Fukushima I: 60 km) | 2011-09-28 13:21 | 0.600 | 0.037~0.071 |
| Fukushima [11] (distance from Fukushima I: 40 km) | 2011-09-28 13:21 | 0.800 | 0.037~0.071 |
| Fukushima [45] (distance from Fukushima I: 20 km) | 2011-09-28 13:35 | 0.500 | 0.037~0.071 |
| Fukushima [78] (distance from Fukushima I: 45 km) | 2011-09-28 15:00 | 0.500 | 0.037~0.071 |
| Fukushima [80] (distance from Fukushima I: 25 km) | 2011-09-28 16:00 | 0.100 | 0.037~0.071 |
| Fukushima [75] (distance from Fukushima I: 45 km) | 2011-09-28 16:50 | 0.100 | 0.037~0.071 |
| Ibaraki-city Environment | 2011-10-15 00:49 | 0.044 | 0.114 (Japan mean) |
| Fukushima I MP3 | 2011-12-27 15:00 | 12.000 | 0.114 (Japan mean) |
| Fukushima I MP6 | 2011-12-27 15:00 | 33.000 | 0.114 (Japan mean) |
| Fukushima II MP1 | 2011-12-27 15:00 | 1.600 | 0.114 (Japan mean) |
| Fukushima II MP4 | 2011-12-27 15:00 | 1.400 | 0.114 (Japan mean) |
| Fukushima II MP7 | 2011-12-27 15:00 | 0.500 | 0.114 (Japan mean) |
| Fukushima I MP1 | 2011-12-27 15:00 | 4.000 | 0.114 (Japan mean) |
| Fukushima I MP4 | 2011-12-27 15:00 | 11.000 | 0.114 (Japan mean) |
| Fukushima I MP7 | 2011-12-27 15:00 | 89.000 | 0.114 (Japan mean) |
| Fukushima II MP2 | 2011-12-27 15:00 | 1.100 | 0.114 (Japan mean) |
| Fukushima II MP5 | 2011-12-27 15:00 | 1.300 | 0.114 (Japan mean) |
| Fukushima I MP2 | 2011-12-27 15:00 | 19.000 | 0.114 (Japan mean) |
| Fukushima I MP5 | 2011-12-27 15:00 | 14.000 | 0.114 (Japan mean) |
| Fukushima I MP8 | 2011-12-27 15:00 | 68.000 | 0.114 (Japan mean) |
| Fukushima II MP3 | 2011-12-27 15:00 | 1.600 | 0.114 (Japan mean) |
| Fukushima II MP6 | 2011-12-27 15:00 | 0.800 | 0.114 (Japan mean) |
| Radiation dose in KEK, Tsukuba | 2013-04-27 15:20 | 0.040 | 0.114 (Japan mean) |
| Radiation dose at JAEA Oarai (P2) | 2013-04-27 23:20 | 0.031 | 0.114 (Japan mean) |
| Radiation dose at Tohoku University | 2013-04-28 07:00 | 0.037 | 0.114 (Japan mean) |
| Geiger Counter Feeds from Asao Kawasaki | 2013-04-29 03:50 | 0.034 | 0.114 (Japan mean) |
| Environment Feeds from Ohta | 2013-04-30 09:20 | 0.051 | 0.114 (Japan mean) |
| Okayasu Maizuru City | 2013-05-23 15:00 | 0.037 | 0.025333~0.1115 |
| Isobe Hitachiota City | 2013-05-23 15:10 | 0.061 | 0.042~0.346 |
| Kumano Shika Town | 2013-05-23 15:10 | 0.047 | 0.033667~0.116167 |
| Chikagawa Mutu City | 2013-05-23 15:10 | 0.023 | 0.013833~0.076833 |
| Tasaki Hokota City | 2013-05-23 15:10 | 0.069 | 0.032167~0.066167 |
| Sakuragaike community hall Omaezaki City | 2013-05-23 15:10 | 0.046 | 0.07~0.120833 |
| Futatsunuma Hirono Town | 2013-05-23 15:10 | 0.201 | 0.036333~0.1 |
| Tsuchikawa Nanao City | 2013-05-23 15:10 | 0.041 | 0.025~0.108833 |
| Odanosawa Higashidoori Village | 2013-05-23 15:10 | 0.016 | 0.0145~0.0745 |
| Yatabe Ibaraki Town | 2013-05-23 15:10 | 0.062 | 0.036~0.060167 |
| Omaezaki City monitoring center | 2013-05-23 15:10 | 0.038 | 0.074~0.1235 |
| Matsudate Naraha Town | 2013-05-23 15:10 | 0.775 | 0.035~0.104333 |
| Kashiwazaki-shigai Kashiwazaki City | 2013-05-23 15:10 | 0.043 | 0.026333~0.0935 |
| Minami-Horoni Kyowa Town | 2013-05-23 15:10 | 0.035 | 0.016333~0.099833 |
| Onuki Oarai Town | 2013-05-23 15:10 | 0.071 | 0.033~0.081167 |
| Daitou branch Kakegawa City | 2013-05-23 15:10 | 0.039 | 0.0495~0.120667 |
| Tomioka Tomioka Town | 2013-05-23 15:10 | 2.605 | 0.034667~0.098333 |
| Miyagawa Kashiwazaki City | 2013-05-23 15:10 | 0.038 | 0.025833~0.0985 |
| Horikappu Jinja Tomari Village | 2013-05-23 15:10 | 0.031 | 0.013~0.103333 |
| Ishikawa Mito City | 2013-05-23 15:10 | 0.064 | 0.044~0.071667 |
| Hitsuhama Ohi Town | 2013-05-23 15:10 | 0.031 | 0.028167~0.091167 |
| Ono Okuma Town | 2013-05-23 15:10 | 3.504 | 0.037~0.088333 |
| Shimo-Takamachi Kariwa Village | 2013-05-23 15:10 | 0.040 | 0.019~0.108667 |
| Kayanuma Tomari Village | 2013-05-23 15:10 | 0.033 | 0.014167~0.0955 |
| Ajigaura Hitachinaka City | 2013-05-23 15:10 | 0.071 | 0.0425~0.073333 |
| Anojiri Obama City | 2013-05-23 15:10 | 0.031 | 0.02075~0.08 |
| Shinzan Futaba Town | 2013-05-23 15:10 | 4.410 | 0.037167~0.080167 |
| Hairando Yokosuka City | 2013-05-23 15:10 | 0.040 | 0.022333~0.07 |
| Godai Naka City | 2013-05-23 15:10 | 0.055 | 0.033333~0.060833 |
| Kounoura Takahama Town | 2013-05-23 15:10 | 0.028 | 0.020333~0.084333 |
| Takenami Mihama Town | 2013-05-23 15:10 | 0.071 | 0.0424~0.116333 |
| Kiyohashi Namie Town | 2013-05-23 15:10 | 0.294 | 0.035333~0.073833 |
| Kurihama Yokosuka City | 2013-05-23 15:10 | 0.036 | 0.0245~0.066833 |
| Sugaya Naka City | 2013-05-23 15:10 | 0.084 | 0.042167~0.107667 |
| Shiraki pass Tsuruga City | 2013-05-23 15:10 | 0.079 | 0.0336~0.139833 |
| Onagawa Onagawa Town | 2013-05-23 15:10 | 0.071 | 0.01~0.024 |
| Hinode Town Yokosuka City | 2013-05-23 15:10 | 0.034 | 0.026667~0.044 |
| Kadobe Naka City | 2013-05-23 15:10 | 0.055 | 0.034833~0.149667 |
| Tateishi Tsuruga City | 2013-05-23 15:10 | 0.068 | 0.0414~0.092167 |
| Touhoku Branch office Touhoku Town | 2013-05-23 15:10 | 0.019 | 0.011~0.053833 |
| Shiohama Kawasaki Ward | 2013-05-23 15:10 | 0.050 | 0.038333~0.074667 |
| Muramatsu Tokai Village | 2013-05-23 15:10 | 0.075 | 0.044333~0.075167 |
| Shika Shika Town | 2013-05-23 15:10 | 0.049 | 0.031167~0.119333 |
| Hiranuma Rokkasho Village | 2013-05-23 15:10 | 0.024 | 0.018~0.061833 |
| Momiyama Hokota City | 2013-05-23 15:10 | 0.074 | 0.037167~0.088167 |
| Shinkango Omaezaki City | 2013-05-23 15:10 | 0.037 | 0.074~0.1335 |
| Toyooka Tokai Village | 2013-05-23 15:10 | 0.073 | 0.0465~0.0745 |
| Onuma Hitachi City | 2013-05-23 15:10 | 0.077 | 0.0365~0.065667 |
| Noumi Shika Town | 2013-05-23 15:10 | 0.051 | 0.0285~0.123833 |
| Tomari Rokkasho Village | 2013-05-23 15:10 | 0.022 | 0.013833~0.104 |
| Araji Hokota City | 2013-05-23 15:10 | 0.075 | 0.0425~0.074333 |
| Shirasuna Omaezaki City | 2013-05-23 15:10 | 0.036 | 0.066~0.119167 |
| Mayumi Hitachiota City | 2013-05-23 15:10 | 0.053 | 0.035833~0.063167 |
| Otsu Nanao City | 2013-05-23 15:10 | 0.044 | 0.030333~0.098333 |
| Yokohama Town Office Yokohama Town | 2013-05-23 15:10 | 0.023 | 0.01725~0.094167 |
| Tsukuriya Hokota City | 2013-05-23 15:10 | 0.091 | 0.039833~0.074167 |
| Sakurasan Ward Omaezaki City | 2013-05-23 15:10 | 0.038 | 0.063~0.115333 |
| Yamadaoka Naraha Town | 2013-05-23 15:10 | 0.227 | 0.038167~0.088667 |
| Power Station- | 2013-05-23 15:10 | 0.036 | 0.014~0.1085 |
| Sunagomata Higashidoori Village | 2013-05-23 15:10 | 0.022 | 0.011~0.0935 |
| Nemoto Hitachioomiya City | 2013-05-23 15:10 | 0.081 | 0.037~0.082667 |
| Hamaokakita primary school Omaezaki City | 2013-05-23 15:10 | 0.041 | 0.069833~0.1225 |
| Shimo-Kooriyama Tomioka Town | 2013-05-23 15:10 | 1.255 | 0.035833~0.097667 |
| Doai Kashiwazaki City | 2013-05-23 15:10 | 0.040 | 0.0195~0.0955 |
| Hattari Kyowa Town | 2013-05-23 15:10 | 0.036 | 0.017~0.112333 |
| Yoshizawa Mito City | 2013-05-23 15:10 | 0.051 | 0.039167~0.063667 |
| Ogasa branch Kikugawa City | 2013-05-23 15:10 | 0.045 | 0.075167~0.123333 |
| Yonomori Tomioka Town | 2013-05-23 15:10 | 3.126 | 0.036333~0.091333 |
| Nishiyama Kashiwazaki City | 2013-05-23 15:10 | 0.041 | 0.016833~0.132333 |
| Herokaruusu Tomari Village | 2013-05-23 15:10 | 0.033 | 0.009~0.107167 |
| Horiguchi Hitachinaka City | 2013-05-23 15:10 | 0.080 | 0.036667~0.077 |
| Obama Obama City | 2013-05-23 15:10 | 0.040 | 0.0336~0.0835 |
| Yamada Futaba Town | 2013-05-23 15:10 | 16.920 | 0.038~0.095667 |
| Kariwa Kariwa Village | 2013-05-23 15:10 | 0.038 | 0.019~0.105167 |
| Kamoenai Kamoenai Village | 2013-05-23 15:10 | 0.031 | 0.013~0.0905 |
| Mawatari Hitachinaka City | 2013-05-23 15:10 | 0.076 | 0.044833~0.078167 |
| Ogurui Takahama Town | 2013-05-23 15:10 | 0.039 | 0.028833~0.087333 |
| kami-Hatori Futaba Town | 2013-05-23 15:10 | 1.697 | 0.034~0.086833 |
| Nagasawa Yokosuka City | 2013-05-23 15:10 | 0.038 | 0.031~0.065333 |
| Sawa Hitachinaka City | 2013-05-23 15:10 | 0.065 | 0.032333~0.061333 |
| Otomi Takahama Town | 2013-05-23 15:10 | 0.044 | 0.035~0.098 |
| Nyuu Mihama Town | 2013-05-23 15:10 | 0.061 | 0.0344~0.106 |
| Yoriiso Ishinomaki City | 2013-05-23 15:10 | 0.085 | 0.012~0.027167 |
| Funagura Yokosuka City | 2013-05-23 15:10 | 0.041 | 0.029~0.066 |
| Kounosu Naka City | 2013-05-23 15:10 | 0.048 | 0.025667~0.055 |
| Shiraki Tsuruga City | 2013-05-23 15:10 | 0.080 | 0.0376~0.1335 |
| Misawa City hall Misawa City | 2013-05-23 15:10 | 0.021 | 0.017~0.1335 |
| Chidori Kawasaki Ward | 2013-05-23 15:10 | 0.036 | 0.02~0.063833 |
| Nukada Naka City | 2013-05-23 15:10 | 0.056 | 0.037833~0.066 |
| Kouno Minami-Echizen Town | 2013-05-23 15:10 | 0.045 | 0.0344~0.084 |
| Aomori Aomori City | 2013-05-23 15:10 | 0.028 | 0.014~0.068833 |
| Oshima Kawasaki Ward | 2013-05-23 15:10 | 0.046 | 0.032667~0.071167 |
| Oshinobe Tokai Village | 2013-05-23 15:10 | 0.062 | 0.040833~0.070167 |
| Akasumi Shika Town | 2013-05-23 15:10 | 0.048 | 0.04~0.1025 |
| Chitose-daira Rokkasho Village | 2013-05-23 15:10 | 0.024 | 0.014~0.066667 |
| Tokushuku Hokota City | 2013-05-23 15:10 | 0.067 | 0.032667~0.055667 |
| Hiraba Omaezaki City | 2013-05-23 15:10 | 0.034 | 0.0395~0.119167 |
| Ishigami Tokai Village | 2013-05-23 15:10 | 0.073 | 0.042167~0.067667 |
| Nemoto Hitachioomiya City | 2013-05-23 15:10 | 0.048 | 0.032833~0.071167 |
| Fukura Shika Town | 2013-05-23 15:10 | 0.040 | 0.0335~0.111833 |
| Fukkoshi Yokohama Town | 2013-05-23 15:10 | 0.023 | 0.014~0.064667 |
| Kamitoda Hokota City | 2013-05-23 15:10 | 0.065 | 0.035833~0.061667 |
| Kusabue Omaezaki City | 2013-05-23 15:10 | 0.037 | 0.074167~0.125833 |
| Kume Hitachiota City | 2013-05-23 15:10 | 0.050 | 0.035833~0.061833 |
| Kazanashi Shika Town | 2013-05-23 15:10 | 0.049 | 0.041~0.112 |
| Oippe Higashidoori Village | 2013-05-23 15:10 | 0.017 | 0.012333~0.064167 |
| Ebisawa Ibaraki Town | 2013-05-23 15:10 | 0.069 | 0.0418~0.1922 |
| Nakamachi Omaezaki City | 2013-05-23 15:10 | 0.054 | 0.078~0.117833 |
| Shigeoka Naraha Town | 2013-05-23 15:10 | 0.577 | 0.0375~0.115333 |
| Power Station-South | 2013-05-23 15:10 | 0.036 | 0.012167~0.111167 |
| Iwanai Iwanai Town | 2013-05-23 15:10 | 0.035 | 0.016833~0.1155 |
| Isohama Oarai Town | 2013-05-23 15:10 | 0.060 | 0.0375~0.070833 |
| Jitougata primary school Makinohara City | 2013-05-23 15:10 | 0.041 | 0.066167~0.114333 |
| Kami-kooriyama Tomioka Town | 2013-05-23 15:10 | 1.209 | 0.029167~0.076667 |
| Arahama Kashiwazaki City | 2013-05-23 15:10 | 0.038 | 0.0225~0.1015 |
| The Meteorological Obsevatory of kyowa Town | 2013-05-23 15:10 | 0.034 | 0.01~0.1065 |
| Oba Mito City | 2013-05-23 15:10 | 0.068 | 0.039~0.2305 |
| Nagai Ohi Town | 2013-05-23 15:10 | 0.036 | 0.024167~0.098667 |
| Mukaihata Okuma Town | 2013-05-23 15:10 | 5.039 | 0.0345~0.093833 |
| Kariwa Kariwa Village | 2013-05-23 15:10 | 0.038 | 0.025~0.099833 |
| Chatsu Tomari Village | 2013-05-23 15:10 | 0.035 | 0.0155~0.107333 |
| Yanagisawa Hitachinaka City | 2013-05-23 15:10 | 0.066 | 0.035333~0.062833 |
| Miyadome Ohi Town | 2013-05-23 15:10 | 0.037 | 0.024667~0.081667 |
| Kooriyama Futaba Town | 2013-05-23 15:10 | 1.059 | 0.035~0.089333 |
| Katsuyama Kariwa Village | 2013-05-23 15:10 | 0.038 | 0.017333~0.1015 |
| Hitachinaka Hitachinaka City | 2013-05-23 15:10 | 0.103 | 0.040167~0.077333 |
| Yamanaka Takahama Town | 2013-05-23 15:10 | 0.026 | 0.011~0.108833 |
| Namie Namie Town | 2013-05-23 15:10 | 0.792 | 0.039167~0.084167 |
| Sahara Yokosuka City | 2013-05-23 15:10 | 0.038 | 0.024167~0.061833 |
| Yokobori Naka City | 2013-05-23 15:10 | 0.059 | 0.035833~0.0705 |
| Sakajiri Mihama Town | 2013-05-23 15:10 | 0.060 | 0.030667~0.123667 |
| Tsuruga Tsuruga City | 2013-05-23 15:10 | 0.059 | 0.0272~0.0935 |
| Koyadori Onagawa Town | 2013-05-23 15:10 | 0.094 | 0.017167~0.034 |
| Uraga Yokosuka City | 2013-05-23 15:10 | 0.042 | 0.024167~0.055833 |
| Motokomezaki Naka City | 2013-05-23 15:10 | 0.058 | 0.029167~0.059 |
| Urasoko Tsuruga City | 2013-05-23 15:10 | 0.075 | 0.0294~0.110833 |
| Touhoku Town office Touhoku Town | 2013-05-23 15:10 | 0.017 | 0.012~0.249 |
| Nishihemi Yokosuka City | 2013-05-23 15:10 | 0.036 | 0.024833~0.053333 |
| Uridura Naka City | 2013-05-23 15:10 | 0.057 | 0.037667~0.063 |
| The Observation point for comparison Tatsunokuchi | 2013-05-23 15:10 | 0.045 | 0.020833~0.081 |
| Noheji Town Office Noheji Town | 2013-05-23 15:10 | 0.033 | 0.011167~0.059 |
| Ukishima Kawasaki Ward | 2013-05-23 15:10 | 0.050 | 0.031667~0.2175 |
| Shirowa primary school Omaezaki City | 2013-05-23 15:10 | 0.045 | 0.069~0.118333 |
| Funaishikawa Tokai Village | 2013-05-23 15:10 | 0.070 | 0.0425~0.073 |
| Goritoge Shika Town | 2013-05-23 15:10 | 0.055 | 0.035~0.125167 |
| Obuchi Rokkasho Village | 2013-05-23 15:10 | 0.024 | 0.012~0.074333 |
| Tonomachi Kawasaki Ward | 2013-05-23 15:10 | 0.032 | 0.026667~0.112333 |
| Uenohara Omaezaki City | 2013-05-23 15:10 | 0.044 | 0.028~0.121667 |
| Kuji Hitachi City | 2013-05-23 15:10 | 0.083 | 0.039~0.176 |
| Hukada-kita Matsue City | 2013-05-23 15:20 | 0.029 | 0.019~0.081833 |
| Satsuma-sendai monitoring center Satsuma-sendai City | 2013-05-23 15:20 | 0.045 | 0.039167~0.0875 |
| Kataku Matsue City | 2013-05-23 15:20 | 0.043 | 0.036833~0.088833 |
| Takae Satsuma-sendai City | 2013-05-23 15:20 | 0.034 | 0.026~0.077333 |
| Minato Satsuma-sendai City | 2013-05-23 15:20 | 0.034 | 0.0264~0.070833 |
| Izumisano municipal Hineno primary scool Station | 2013-05-23 15:20 | 0.042 | 0.041~0.080167 |
| Hirao Genkai Town | 2013-05-23 15:20 | 0.030 | 0.027833~0.162333 |
| Osaka prefectural Hineno high scool Station | 2013-05-23 15:20 | 0.037 | 0.035167~0.089 |
| Hokawaduura Genkai Town | 2013-05-23 15:20 | 0.033 | 0.031~0.11775 |
| Atom-kyoudou nursery school Station | 2013-05-23 15:20 | 0.051 | 0.053833~0.1005 |
| Toyonoura Ikata Town | 2013-05-23 15:20 | 0.013 | 0.0105~0.0595 |
| Kumatori Town office Station | 2013-05-23 15:20 | 0.036 | 0.039333~0.076167 |
| Kuchogoshi Ikata Town | 2013-05-23 15:20 | 0.018 | 0.015~0.057667 |
| North point of Kinki University Atomic Energy Research Instirute Station | 2013-05-23 15:20 | 0.051 | 0.055167~0.077667 |
| Ikatagoshi Ikata Town | 2013-05-23 15:20 | 0.019 | 0.017333~0.056833 |
| Kurahashi Maizuru City | 2013-05-23 15:20 | 0.049 | 0.036~0.093333 |
| Ningyotoge Kagamino Town | 2013-05-23 15:20 | 0.063 | 0.018667~0.099333 |
| Shiokumi Maizuru City | 2013-05-23 15:20 | 0.037 | 0.021~0.168667 |
| Nishi-hamasada Matsue City | 2013-05-23 15:20 | 0.049 | 0.027667~0.111167 |
| Koura Matsue City | 2013-05-23 15:20 | 0.041 | 0.036167~0.105833 |
| Mitsu Matsue City | 2013-05-23 15:20 | 0.040 | 0.03~0.088667 |
| Ueno Satsuma-sendai City | 2013-05-23 15:20 | 0.035 | 0.032~0.076333 |
| Owashi Matsue City | 2013-05-23 15:20 | 0.037 | 0.0325~0.094667 |
| Kodaira Satsuma-sendai City | 2013-05-23 15:20 | 0.031 | 0.029~0.071667 |
| Kyoudomarisaki Karatsu City | 2013-05-23 15:20 | 0.029 | 0.026~0.165 |
| Osaka prefectural Sano supporting school Station | 2013-05-23 15:20 | 0.038 | 0.0345~0.097 |
| Sakibe Karatsu City | 2013-05-23 15:20 | 0.030 | 0.028~0.154 |
| Kumatori town Minami primary school Station | 2013-05-23 15:20 | 0.048 | 0.048167~0.1065 |
| Kashu Ikata Town | 2013-05-23 15:20 | 0.025 | 0.022667~0.069833 |
| Kumatori town Nishi primary school Station | 2013-05-23 15:20 | 0.052 | 0.052333~0.092833 |
| Taisei Ikata Town | 2013-05-23 15:20 | 0.022 | 0.02~0.045167 |
| The athletic field Station of Kinki University | 2013-05-23 15:20 | 0.039 | 0.0395~0.073833 |
| Kawanagata Ikata Town | 2013-05-23 15:20 | 0.024 | 0.02~0.060167 |
| Oitomi Ayabe City | 2013-05-23 15:20 | 0.043 | 0.024~0.1175 |
| Ten-no Kagamino Town | 2013-05-23 15:20 | 0.058 | 0.022333~0.119 |
| Kijiyama Misasa Town | 2013-05-23 15:20 | 0.049 | 0.0145~0.0925 |
| Oyama Maizuru City | 2013-05-23 15:20 | 0.031 | 0.019~0.097667 |
| Sadahongou Matsue City | 2013-05-23 15:20 | 0.030 | 0.021~0.0995 |
| Kami-koubu Matsue City | 2013-05-23 15:20 | 0.037 | 0.0185~0.096833 |
| Tayu Matsue City | 2013-05-23 15:20 | 0.043 | 0.039333~0.092667 |
| Yorita Satsuma-sendai City | 2013-05-23 15:20 | 0.030 | 0.026~0.083833 |
| Gumisaki Satsuma-sendai City | 2013-05-23 15:20 | 0.026 | 0.007~0.067667 |
| Izumisano municipal Oike athletic field Station | 2013-05-23 15:20 | 0.055 | 0.048667~0.104667 |
| Takasimamati | 2013-05-23 15:20 | 0.023 | 0.01725~0.074333 |
| Izumisano municipal Hineno filtration plant Station | 2013-05-23 15:20 | 0.043 | 0.042667~0.100167 |
| Imamura Genkai Town | 2013-05-23 15:20 | 0.028 | 0.025333~1.39833 |
| Osaka prefectural Kumatori off-site-center Station | 2013-05-23 15:20 | 0.044 | 0.044333~0.092333 |
| Kushi Genkai Town | 2013-05-23 15:20 | 0.031 | 0.028~0.1625 |
| Yamanotedai-No.1 Park Station | 2013-05-23 15:20 | 0.051 | 0.05~0.099333 |
| Kucho Ikata Town | 2013-05-23 15:20 | 0.024 | 0.021333~0.061667 |
| South point of Kinki University Atomic Energy Research Instirute Station | 2013-05-23 15:20 | 0.054 | 0.054333~0.0915 |
| Minatoura Ikata Town | 2013-05-23 15:20 | 0.016 | 0.014~0.051833 |
| Higashiosaka municipal Kamikosaka primary scool Station | 2013-05-23 15:20 | 0.044 | 0.046167~0.0775 |
| Akawase Kagamino Town | 2013-05-23 15:20 | 0.046 | 0.0175~0.076167 |
| Kichisaka Maizuru City | 2013-05-23 15:20 | 0.036 | 0.022667~0.1355 |
| Kou Itimatsu Suetsugu | 2013-05-23 15:20 | 0.035 | 0.022833~0.085 |
| Kita-koubu Matsue City | 2013-05-23 15:20 | 0.037 | 0.021833~0.103833 |
Units: absorbed dose rate [μGy/h]
Data source - Absorbed dose rate:
Accumulated absorbed dose rate:
Colour scale:
- In cases of x-rays and gamma rays and electrons absorbed by human tissue Gray is often converted into Sievert by assuming
1 Gy/h = 1 SV/h (see information below).
Roentgen equivalent in man (rem): 1 Sv = 100 rem - Please note: The y-axis displaying the absorbed dose rate and accumulation plots can vary depending on location and time frame.
Data source - Absorbed dose rate:
| Dataset 1 | Dataset 2 | Dataset 3 | Dataset 4 | |
| Source | MEXT Readings | MEXT (SPEEDI) | TEPCO | Pachube |
| Data available | since 13.3.2011 or 15.3.2011 hourly averages |
since 1.1.2010 10 minute data |
since 14.4.2011 10 minute data |
since 22.3.2011 different sources with 10 minute data or hourly averages |
| hourly averages | hourly averages | hourly averages | hourly averages | |
| Minimum value (Vmin) and maximum value (Vmax) from usual value band: "Usual value band means a range of the maximum and minimum value observed before the earthquake" [MEXT: e.g. pdf]) | Minimum value (Vmin) and maximum value (Vmax) calculated with the data of the respective locations from 1.1.2010 to 10.3.2011 (from hourly averages) | no value band | no value band |
Sometimes data is not transmitted due to maintenance or for other reasons. Missing data is not bridged by lines.
Only values refering to sequential hours are connected.
Accumulated absorbed dose rate:
| Dataset 1, Dataset 2, Dataset 3 and Dataset 4 | |
| Accumulated dose rate = summation of hourly averages of absorbed dose rate Accumulation period: 13.3.2011 up to today |
|
| ❚ ❚ | ❚Accumulation of original data Missing values: ❚Accumulation of interpolated data:
Missing values are approximated since original data of average absorbed dose rate is not available for every hour. Missing data points are computed by linear interpolation.
∅Missing data at the beginning of the period:
Missing values at the beginning of the accumulation period (13.3.) will be set to 0.
All data taken into account in the accumulation is shown in the graph ‘interpolated raw data’ (top left button above the graph).
In those cases the calculated accumulation values show below the actual accumulation values. Regarding the assessment of the timeline: Radiation releases during the initial hydrogen explosions. |
| The red graph shows the accumulation of 0,114 μGy/h based on an estimated average for Japan of 1000 μGy per year (equates 0,114 μGy/h *24 hours * 365 days). The accumulation starts with the first available value of the data set after 13.3.2011 (see missing values above). | |
| The green graph shows the accumulation of Vmax. The accumulation starts with the first available value of the data set after 13.3.2011 (see missing values above). |
Colour scale:
| < Vmax | < 10 * Vmax | < 100 * Vmax | > 100 * Vmax |
The colour scale is based on the maximum Value (Vmax) measured at the location of the Geiger counter prior to the accident. Therefore allowing to spell out the changes in comparison to the values prior to the accident.
Natural radiation:
- Total annual natural radiation dose for people living in Japan is estimated to be about 1000 microsieverts [RERF's Messages]
- Map of natural radiation levels in Japan [JAEA]
- All living organisms are continually exposed to ionizing radiation,which has always existed naturally. The
sources of that exposure are cosmic rays that come from
outer space and from the surface of the Sun, terrestrial
radionuclides that occur in the Earth’s crust, in building
materials and in air, water and foods and in the human
body itself. For more information see
- Background radiation [wiki]
- Exposures from natural radiation sources [UNSCEAR 2000 report Vol. I Annex B]
- [Report of the United Nations Scientific Committee on the Effects of Atomic Radiation to the General Assembly] [UNSCEAR]
- The worldwide average background dose for a human being is about 2400 microsieverts per year
Health effects - information:
- Health effects [U.S. Environmental Protection Agency]
- Dose comparisons for ionising radiation [Health Protection Agency (UK)]
- Japan nuclear concerns [WHO]
- Fukushima Nuclear Power Plant Accident - .pdf [ICRP]
Units: absorbed dose rate [Gy/h]
Absorbed dose [Gy]:
The unit gray, [Gy], measures radiation which is absorbed into any material.
Equivalent dose [Sv]:
The unit sievert, [Sv], specifically measures radiation which is absorbed by a person.
The equivalent dose to a person is found by multiplying the absorbed dose, in gray, by a radiation weighting factor (WR ).
The radiation weighting factor WR is introduced to allow for the different relative biological effects of different types of ionizing radiation on human tissue.
In terms of SI base units:
1 Sv = 1 Gy ⋅ WR
where Sv=sievert, Gy=gray, WR =weighting factor specific to each type of radiation and tissue.
Effective dose [Sv]:
The probability of a harmful effect from radiation exposure depends on what part or parts of the body are exposed. Some organs are more sensitive to radiation than others. A tissue weighting factor is used to take this into account. When an equivalent dose to an organ is multiplied by the tissue weighting factor for that organ the result is the effective dose to that organ. If more than one organ is exposed then the effective dose, is the sum of the effective doses to all exposed organs [1].
more information:
Absorbed dose [Gy]:
The unit gray, [Gy], measures radiation which is absorbed into any material.
Equivalent dose [Sv]:
The unit sievert, [Sv], specifically measures radiation which is absorbed by a person.
The equivalent dose to a person is found by multiplying the absorbed dose, in gray, by a radiation weighting factor (WR ).
The radiation weighting factor WR is introduced to allow for the different relative biological effects of different types of ionizing radiation on human tissue.
In terms of SI base units:
1 Sv = 1 Gy ⋅ WR
where Sv=sievert, Gy=gray, WR =weighting factor specific to each type of radiation and tissue.
Radiation weighting factor (WR ):
For x-rays and gamma rays and electrons absorbed by human tissue, WR is 1. For alpha particles it is 20. To compute Sieverts from Grays, simply multiply by WR . This is obviously a simplification. The radiation weighting factor WR approximates what otherwise would be very complicated computations. The values for WR change periodically as new research refines the approximations [1].
For x-rays and gamma rays and electrons absorbed by human tissue, WR is 1. For alpha particles it is 20. To compute Sieverts from Grays, simply multiply by WR . This is obviously a simplification. The radiation weighting factor WR approximates what otherwise would be very complicated computations. The values for WR change periodically as new research refines the approximations [1].
Effective dose [Sv]:
The probability of a harmful effect from radiation exposure depends on what part or parts of the body are exposed. Some organs are more sensitive to radiation than others. A tissue weighting factor is used to take this into account. When an equivalent dose to an organ is multiplied by the tissue weighting factor for that organ the result is the effective dose to that organ. If more than one organ is exposed then the effective dose, is the sum of the effective doses to all exposed organs [1].
more information:
- Radiation Protection Video [Ionactive Consulting]
- Gray [wiki]
- Sievert [wiki]
- Rem [wiki]
- Orders of magnitude (radiation) [wiki]
- Dosimetry & Shielding [nucleonica.net/wiki]
- [1] Units for Measuring Radiation [Australien Radiation Protection and Nuclear Safety Agency]
- Radiation effects from Fukushima I nuclear accidents [Wiki]
Absorbed dose rate
Fukushima I Nuclear power plant
ATTENTION: These products are highly uncertain based on limited information for the source terms. Please use with caution and understand that the values are likely to change.
- ZAMG: dispersion model
- Iodine 131
- Xenon 133
- Caesium 137
- EURAD: dispersion model
- Caesium 137 surface
- Caesium 137 2500m
- Caesium 137 5000m
- FLEXPART: dispersion model
- Iodine 131
- Xenon 133
- Caesium 137
- HYSPLIT: air parcel trajectories
- ensemble
- different heights
Japan nuclear accident
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