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Station list Japan - absorbed dose rate

< 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
Saitama 2011-04-10 17:00 0.064 0.031~0.06
Kumamoto 2011-04-10 17:00 0.027 0.021~0.067
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 in Iwanuma 2011-07-14 13:36 0.190 0.114 (Japan mean)
Radiation dose at JAEA Oarai (P6) 2011-07-14 13:36 0.123 0.114 (Japan mean)
Radiation dose at JAEA Oarai (P16) 2011-07-14 13:36 0.176 0.114 (Japan mean)
Radiation dose at JAEA Oarai (P13) 2011-07-14 13:36 0.232 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 in Yamamoto 2011-07-14 13:36 0.260 0.114 (Japan mean)
Radiation dose at JAEA Oarai (P1) 2011-07-14 13:36 0.190 0.114 (Japan mean)
Radiation dose in Natori 2011-07-14 13:36 0.130 0.114 (Japan mean)
Radiation dose at JAEA Oarai (P5) 2011-07-14 13:36 0.169 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 dose in Onagawa (MP-2) 2011-07-14 13:36 0.160 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 Marumori 2011-07-14 13:36 0.090 0.114 (Japan mean)
Radiation dose in Watari 2011-07-14 13:36 0.230 0.114 (Japan mean)
Radiation dose at JAEA Oarai (P7) 2011-07-14 13:36 0.270 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 dose in Onagawa (MP-1) 2011-07-14 13:36 0.100 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 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
Akita 2011-08-18 09:00 0.060 0.022~0.086
Kagawa 2011-08-18 09:00 0.054 0.051~0.077
Aomori 2011-08-18 09:00 0.029 0.017~0.102
Okayama 2011-08-18 09:00 0.049 0.043~0.104
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
Yamagata 2011-08-18 09:00 0.044 0.025~0.082
Kochi 2011-08-18 09:00 0.027 0.023~0.076
Iwate 2011-08-18 09:00 0.045 0.014~0.084
Tokushima 2011-08-18 09:00 0.040 0.037~0.067
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
Hokkaido 2011-08-18 09:00 0.030 0.02~0.105
Yamaguchi 2011-08-18 09:00 0.092 0.084~0.128
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)
Kumano Shika Town 2013-05-30 23:40 0.046 0.033667~0.116167
Hiranuma Rokkasho Village 2013-05-31 00:10 0.024 0.018~0.061833
Shirowa primary school Omaezaki City 2013-05-31 00:20 0.044 0.069~0.118333
Funaishikawa Tokai Village 2013-05-31 00:30 0.069 0.0425~0.073
Miyagawa Kashiwazaki City 2013-05-31 00:50 0.039 0.025833~0.0985
Miyadome Ohi Town 2013-05-31 04:00 0.035 0.024667~0.081667
Kucho Ikata Town 2013-05-31 05:10 0.023 0.021333~0.061667
Chikagawa Mutu City 2013-05-31 06:00 0.023 0.013833~0.076833
Tasaki Hokota City 2013-05-31 06:00 0.068 0.032167~0.066167
Sakuragaike community hall Omaezaki City 2013-05-31 06:00 0.045 0.07~0.120833
Satsuma-sendai monitoring center Satsuma-sendai City 2013-05-31 06:00 0.043 0.039167~0.0875
Isobe Hitachiota City 2013-05-31 06:00 0.059 0.042~0.346
Hukada-kita Matsue City 2013-05-31 06:00 0.028 0.019~0.081833
Kataku Matsue City 2013-05-31 06:00 0.043 0.036833~0.088833
Odanosawa Higashidoori Village 2013-05-31 06:00 0.016 0.0145~0.0745
Yatabe Ibaraki Town 2013-05-31 06:00 0.062 0.036~0.060167
Omaezaki City monitoring center 2013-05-31 06:00 0.038 0.074~0.1235
Takae Satsuma-sendai City 2013-05-31 06:00 0.032 0.026~0.077333
Futatsunuma Hirono Town 2013-05-31 06:00 0.195 0.036333~0.1
Tsuchikawa Nanao City 2013-05-31 06:00 0.039 0.025~0.108833
Izumisano municipal Hineno primary scool Station 2013-05-31 06:00 0.042 0.041~0.080167
Minami-Horoni Kyowa Town 2013-05-31 06:00 0.036 0.016333~0.099833
Onuki Oarai Town 2013-05-31 06:00 0.070 0.033~0.081167
Daitou branch Kakegawa City 2013-05-31 06:00 0.039 0.0495~0.120667
Minato Satsuma-sendai City 2013-05-31 06:00 0.034 0.0264~0.070833
Matsudate Naraha Town 2013-05-31 06:00 0.741 0.035~0.104333
Kashiwazaki-shigai Kashiwazaki City 2013-05-31 06:00 0.042 0.026333~0.0935
Osaka prefectural Hineno high scool Station 2013-05-31 06:00 0.035 0.035167~0.089
Horikappu Jinja Tomari Village 2013-05-31 06:00 0.031 0.013~0.103333
Ishikawa Mito City 2013-05-31 06:00 0.066 0.044~0.071667
Hitsuhama Ohi Town 2013-05-31 06:00 0.029 0.028167~0.091167
Hirao Genkai Town 2013-05-31 06:00 0.030 0.027833~0.162333
Tomioka Tomioka Town 2013-05-31 06:00 2.535 0.034667~0.098333
Atom-kyoudou nursery school Station 2013-05-31 06:00 0.051 0.053833~0.1005
Kayanuma Tomari Village 2013-05-31 06:00 0.033 0.014167~0.0955
Ajigaura Hitachinaka City 2013-05-31 06:00 0.070 0.0425~0.073333
Anojiri Obama City 2013-05-31 06:00 0.029 0.02075~0.08
Hokawaduura Genkai Town 2013-05-31 06:00 0.034 0.031~0.11775
Ono Okuma Town 2013-05-31 06:00 3.408 0.037~0.088333
Shimo-Takamachi Kariwa Village 2013-05-31 06:00 0.040 0.019~0.108667
Hairando Yokosuka City 2013-05-31 06:00 0.039 0.022333~0.07
Kumatori Town office Station 2013-05-31 06:00 0.036 0.039333~0.076167
Godai Naka City 2013-05-31 06:00 0.053 0.033333~0.060833
Kounoura Takahama Town 2013-05-31 06:00 0.029 0.020333~0.084333
Toyonoura Ikata Town 2013-05-31 06:00 0.012 0.0105~0.0595
Shinzan Futaba Town 2013-05-31 06:00 4.226 0.037167~0.080167
Kurihama Yokosuka City 2013-05-31 06:00 0.035 0.0245~0.066833
North point of Kinki University Atomic Energy Research Instirute Station 2013-05-31 06:00 0.049 0.055167~0.077667
Sugaya Naka City 2013-05-31 06:00 0.083 0.042167~0.107667
Takenami Mihama Town 2013-05-31 06:00 0.070 0.0424~0.116333
Kuchogoshi Ikata Town 2013-05-31 06:00 0.018 0.015~0.057667
Kiyohashi Namie Town 2013-05-31 06:00 0.289 0.035333~0.073833
Hinode Town Yokosuka City 2013-05-31 06:00 0.034 0.026667~0.044
Kadobe Naka City 2013-05-31 06:00 0.053 0.034833~0.149667
Shiraki pass Tsuruga City 2013-05-31 06:00 0.078 0.0336~0.139833
Ikatagoshi Ikata Town 2013-05-31 06:00 0.019 0.017333~0.056833
Onagawa Onagawa Town 2013-05-31 06:00 0.071 0.01~0.024
Shiohama Kawasaki Ward 2013-05-31 06:00 0.049 0.038333~0.074667
Muramatsu Tokai Village 2013-05-31 06:00 0.073 0.044333~0.075167
Tateishi Tsuruga City 2013-05-31 06:00 0.069 0.0414~0.092167
Ningyotoge Kagamino Town 2013-05-31 06:00 0.062 0.018667~0.099333
Touhoku Branch office Touhoku Town 2013-05-31 06:00 0.017 0.011~0.053833
Momiyama Hokota City 2013-05-31 06:00 0.073 0.037167~0.088167
Shinkango Omaezaki City 2013-05-31 06:00 0.036 0.074~0.1335
Toyooka Tokai Village 2013-05-31 06:00 0.073 0.0465~0.0745
Shika Shika Town 2013-05-31 06:00 0.047 0.031167~0.119333
Nishi-hamasada Matsue City 2013-05-31 06:00 0.047 0.027667~0.111167
Tomari Rokkasho Village 2013-05-31 06:00 0.021 0.013833~0.104
Araji Hokota City 2013-05-31 06:00 0.075 0.0425~0.074333
Shirasuna Omaezaki City 2013-05-31 06:00 0.035 0.066~0.119167
Onuma Hitachi City 2013-05-31 06:00 0.076 0.0365~0.065667
Noumi Shika Town 2013-05-31 06:00 0.051 0.0285~0.123833
Koura Matsue City 2013-05-31 06:00 0.041 0.036167~0.105833
Yokohama Town Office Yokohama Town 2013-05-31 06:00 0.023 0.01725~0.094167
Tsukuriya Hokota City 2013-05-31 06:00 0.089 0.039833~0.074167
Sakurasan Ward Omaezaki City 2013-05-31 06:00 0.038 0.063~0.115333
Ueno Satsuma-sendai City 2013-05-31 06:00 0.035 0.032~0.076333
Mayumi Hitachiota City 2013-05-31 06:00 0.053 0.035833~0.063167
Otsu Nanao City 2013-05-31 06:00 0.041 0.030333~0.098333
Mitsu Matsue City 2013-05-31 06:00 0.041 0.03~0.088667
Owashi Matsue City 2013-05-31 06:00 0.037 0.0325~0.094667
Sunagomata Higashidoori Village 2013-05-31 06:00 0.022 0.011~0.0935
Nemoto Hitachioomiya City 2013-05-31 06:00 0.080 0.037~0.082667
Hamaokakita primary school Omaezaki City 2013-05-31 06:00 0.041 0.069833~0.1225
Kodaira Satsuma-sendai City 2013-05-31 06:00 0.032 0.029~0.071667
Yamadaoka Naraha Town 2013-05-31 06:00 0.222 0.038167~0.088667
Power Station- 2013-05-31 06:00 0.034 0.014~0.1085
Osaka prefectural Sano supporting school Station 2013-05-31 06:00 0.038 0.0345~0.097
Hattari Kyowa Town 2013-05-31 06:00 0.037 0.017~0.112333
Yoshizawa Mito City 2013-05-31 06:00 0.051 0.039167~0.063667
Ogasa branch Kikugawa City 2013-05-31 06:00 0.043 0.075167~0.123333
Kyoudomarisaki Karatsu City 2013-05-31 06:00 0.029 0.026~0.165
Shimo-Kooriyama Tomioka Town 2013-05-31 06:00 1.212 0.035833~0.097667
Doai Kashiwazaki City 2013-05-31 06:00 0.039 0.0195~0.0955
Kumatori town Minami primary school Station 2013-05-31 06:00 0.048 0.048167~0.1065
Herokaruusu Tomari Village 2013-05-31 06:00 0.034 0.009~0.107167
Horiguchi Hitachinaka City 2013-05-31 06:00 0.079 0.036667~0.077
Obama Obama City 2013-05-31 06:00 0.038 0.0336~0.0835
Sakibe Karatsu City 2013-05-31 06:00 0.031 0.028~0.154
Yonomori Tomioka Town 2013-05-31 06:00 3.066 0.036333~0.091333
Nishiyama Kashiwazaki City 2013-05-31 06:00 0.040 0.016833~0.132333
Kumatori town Nishi primary school Station 2013-05-31 06:00 0.051 0.052333~0.092833
Kamoenai Kamoenai Village 2013-05-31 06:00 0.032 0.013~0.0905
Mawatari Hitachinaka City 2013-05-31 06:00 0.073 0.044833~0.078167
Ogurui Takahama Town 2013-05-31 06:00 0.040 0.028833~0.087333
Kashu Ikata Town 2013-05-31 06:00 0.024 0.022667~0.069833
Yamada Futaba Town 2013-05-31 06:00 16.230 0.038~0.095667
Kariwa Kariwa Village 2013-05-31 06:00 0.037 0.019~0.105167
Nagasawa Yokosuka City 2013-05-31 06:00 0.038 0.031~0.065333
The athletic field Station of Kinki University 2013-05-31 06:00 0.038 0.0395~0.073833
Sawa Hitachinaka City 2013-05-31 06:00 0.063 0.032333~0.061333
Otomi Takahama Town 2013-05-31 06:00 0.044 0.035~0.098
Taisei Ikata Town 2013-05-31 06:00 0.022 0.02~0.045167
kami-Hatori Futaba Town 2013-05-31 06:00 1.606 0.034~0.086833
Funagura Yokosuka City 2013-05-31 06:00 0.039 0.029~0.066
Kounosu Naka City 2013-05-31 06:00 0.048 0.025667~0.055
Nyuu Mihama Town 2013-05-31 06:00 0.061 0.0344~0.106
Kawanagata Ikata Town 2013-05-31 06:00 0.024 0.02~0.060167
Yoriiso Ishinomaki City 2013-05-31 06:00 0.086 0.012~0.027167
Chidori Kawasaki Ward 2013-05-31 06:00 0.036 0.02~0.063833
Nukada Naka City 2013-05-31 06:00 0.056 0.037833~0.066
Shiraki Tsuruga City 2013-05-31 06:00 0.078 0.0376~0.1335
Ten-no Kagamino Town 2013-05-31 06:00 0.056 0.022333~0.119
Misawa City hall Misawa City 2013-05-31 06:00 0.021 0.017~0.1335
Oshima Kawasaki Ward 2013-05-31 06:00 0.045 0.032667~0.071167
Oshinobe Tokai Village 2013-05-31 06:00 0.060 0.040833~0.070167
Kouno Minami-Echizen Town 2013-05-31 06:00 0.046 0.0344~0.084
Aomori Aomori City 2013-05-31 06:00 0.027 0.014~0.068833
Chitose-daira Rokkasho Village 2013-05-31 06:00 0.023 0.014~0.066667
Tokushuku Hokota City 2013-05-31 06:00 0.065 0.032667~0.055667
Hiraba Omaezaki City 2013-05-31 06:00 0.034 0.0395~0.119167
Ishigami Tokai Village 2013-05-31 06:00 0.073 0.042167~0.067667
Akasumi Shika Town 2013-05-31 06:00 0.047 0.04~0.1025
Sadahongou Matsue City 2013-05-31 06:00 0.030 0.021~0.0995
Fukkoshi Yokohama Town 2013-05-31 06:00 0.023 0.014~0.064667
Kamitoda Hokota City 2013-05-31 06:00 0.065 0.035833~0.061667
Kusabue Omaezaki City 2013-05-31 06:00 0.037 0.074167~0.125833
Nemoto Hitachioomiya City 2013-05-31 06:00 0.048 0.032833~0.071167
Fukura Shika Town 2013-05-31 06:00 0.040 0.0335~0.111833
Kami-koubu Matsue City 2013-05-31 06:00 0.037 0.0185~0.096833
Tayu Matsue City 2013-05-31 06:00 0.043 0.039333~0.092667
Oippe Higashidoori Village 2013-05-31 06:00 0.017 0.012333~0.064167
Ebisawa Ibaraki Town 2013-05-31 06:00 0.067 0.0418~0.1922
Nakamachi Omaezaki City 2013-05-31 06:00 0.053 0.078~0.117833
Yorita Satsuma-sendai City 2013-05-31 06:00 0.030 0.026~0.083833
Kume Hitachiota City 2013-05-31 06:00 0.050 0.035833~0.061833
Kazanashi Shika Town 2013-05-31 06:00 0.048 0.041~0.112
Izumisano municipal Oike athletic field Station 2013-05-31 06:00 0.055 0.048667~0.104667
Iwanai Iwanai Town 2013-05-31 06:00 0.036 0.016833~0.1155
Isohama Oarai Town 2013-05-31 06:00 0.059 0.0375~0.070833
Jitougata primary school Makinohara City 2013-05-31 06:00 0.041 0.066167~0.114333
Gumisaki Satsuma-sendai City 2013-05-31 06:00 0.027 0.007~0.067667
Shigeoka Naraha Town 2013-05-31 06:00 0.543 0.0375~0.115333
Power Station-South 2013-05-31 06:00 0.036 0.012167~0.111167
Izumisano municipal Hineno filtration plant Station 2013-05-31 06:00 0.040 0.042667~0.100167
The Meteorological Obsevatory of kyowa Town 2013-05-31 06:00 0.035 0.01~0.1065
Oba Mito City 2013-05-31 06:00 0.065 0.039~0.2305
Nagai Ohi Town 2013-05-31 06:00 0.035 0.024167~0.098667
Kami-kooriyama Tomioka Town 2013-05-31 06:00 1.181 0.029167~0.076667
Arahama Kashiwazaki City 2013-05-31 06:00 0.038 0.0225~0.1015
Osaka prefectural Kumatori off-site-center Station 2013-05-31 06:00 0.042 0.044333~0.092333
Chatsu Tomari Village 2013-05-31 06:00 0.036 0.0155~0.107333
Yanagisawa Hitachinaka City 2013-05-31 06:00 0.066 0.035333~0.062833
Imamura Genkai Town 2013-05-31 06:00 0.028 0.025333~1.39833
Mukaihata Okuma Town 2013-05-31 06:00 4.843 0.0345~0.093833
Kariwa Kariwa Village 2013-05-31 06:00 0.038 0.025~0.099833
Yamanotedai-No.1 Park Station 2013-05-31 06:00 0.051 0.05~0.099333
Hitachinaka Hitachinaka City 2013-05-31 06:00 0.098 0.040167~0.077333
Yamanaka Takahama Town 2013-05-31 06:00 0.027 0.011~0.108833
Kushi Genkai Town 2013-05-31 06:00 0.031 0.028~0.1625
Kooriyama Futaba Town 2013-05-31 06:00 1.063 0.035~0.089333
Katsuyama Kariwa Village 2013-05-31 06:00 0.037 0.017333~0.1015
Sahara Yokosuka City 2013-05-31 06:00 0.038 0.024167~0.061833
South point of Kinki University Atomic Energy Research Instirute Station 2013-05-31 06:00 0.054 0.054333~0.0915
Yokobori Naka City 2013-05-31 06:00 0.057 0.035833~0.0705
Sakajiri Mihama Town 2013-05-31 06:00 0.059 0.030667~0.123667
Namie Namie Town 2013-05-31 06:00 0.774 0.039167~0.084167
Uraga Yokosuka City 2013-05-31 06:00 0.041 0.024167~0.055833
Higashiosaka municipal Kamikosaka primary scool Station 2013-05-31 06:00 0.043 0.046167~0.0775
Motokomezaki Naka City 2013-05-31 06:00 0.057 0.029167~0.059
Tsuruga Tsuruga City 2013-05-31 06:00 0.057 0.0272~0.0935
Minatoura Ikata Town 2013-05-31 06:00 0.016 0.014~0.051833
Koyadori Onagawa Town 2013-05-31 06:00 0.094 0.017167~0.034
Nishihemi Yokosuka City 2013-05-31 06:00 0.036 0.024833~0.053333
Uridura Naka City 2013-05-31 06:00 0.055 0.037667~0.063
Urasoko Tsuruga City 2013-05-31 06:00 0.073 0.0294~0.110833
Akawase Kagamino Town 2013-05-31 06:00 0.047 0.0175~0.076167
Touhoku Town office Touhoku Town 2013-05-31 06:00 0.017 0.012~0.249
Ukishima Kawasaki Ward 2013-05-31 06:00 0.048 0.031667~0.2175
The Observation point for comparison Tatsunokuchi 2013-05-31 06:00 0.043 0.020833~0.081
Kou Itimatsu Suetsugu 2013-05-31 06:00 0.032 0.022833~0.085
Noheji Town Office Noheji Town 2013-05-31 06:00 0.032 0.011167~0.059
Obuchi Rokkasho Village 2013-05-31 06:00 0.023 0.012~0.074333
Tonomachi Kawasaki Ward 2013-05-31 06:00 0.032 0.026667~0.112333
Uenohara Omaezaki City 2013-05-31 06:00 0.044 0.028~0.121667
Kuji Hitachi City 2013-05-31 06:00 0.083 0.039~0.176
Goritoge Shika Town 2013-05-31 06:00 0.054 0.035~0.125167
Kita-koubu Matsue City 2013-05-31 06:00 0.037 0.021833~0.103833
Radiation dose at JAEA Oarai (P12) 2014-04-29 06:50 0.048 0.114 (Japan mean)
Kurahashi Maizuru City 2014-08-01 11:40 0.050 0.036~0.093333
Shiokumi Maizuru City 2014-08-01 11:40 0.038 0.021~0.168667
Oitomi Ayabe City 2014-08-01 11:40 0.046 0.024~0.1175
Okayasu Maizuru City 2014-08-01 11:40 0.039 0.025333~0.1115
Oyama Maizuru City 2014-08-01 11:40 0.033 0.019~0.097667
Kijiyama Misasa Town 2014-08-01 11:40 0.050 0.0145~0.0925
Takasimamati 2014-08-01 11:40 0.022 0.01725~0.074333
Kichisaka Maizuru City 2014-08-01 11:40 0.038 0.022667~0.1355
Units: absorbed dose rate [μGy/h]
  • 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
 
band Vmax-Vmin
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.
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.
All data taken into account in the accumulation is shown in the graph ‘interpolated raw data’ (top left button above the graph).
 
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:
Health effects - information:
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.

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].


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].

Tissue weighting factor:

see table European nuclear society


more information:

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.
Cloud spread Fukushima
Cloud spread Fukushima
Cloud spread Fukushima
Summary

Japan nuclear accident