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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
Okinawa 2011-08-29 09:00 0.024 0.0133~0.0575
Takasimamati 2014-09-19 09:30 0.033 0.01725~0.074333
Yorita Satsuma-sendai City 2013-05-31 06:00 0.030 0.026~0.083833
Kyoudomarisaki Karatsu City 2013-05-31 06:00 0.029 0.026~0.165
Ueno Satsuma-sendai City 2013-05-31 06:00 0.035 0.032~0.076333
Kodaira Satsuma-sendai City 2013-05-31 06:00 0.032 0.029~0.071667
Gumisaki Satsuma-sendai City 2013-05-31 06:00 0.027 0.007~0.067667
Minato Satsuma-sendai City 2013-05-31 06:00 0.034 0.0264~0.070833
Imamura Genkai Town 2013-05-31 06:00 0.028 0.025333~1.39833
Nagasaki 2011-08-18 09:00 0.028 0.027~0.069
Hirao Genkai Town 2013-05-31 06:00 0.030 0.027833~0.162333
Hokawaduura Genkai Town 2013-05-31 06:00 0.034 0.031~0.11775
Kushi Genkai Town 2013-05-31 06:00 0.031 0.028~0.1625
Sakibe Karatsu City 2013-05-31 06:00 0.031 0.028~0.154
Takae Satsuma-sendai City 2013-05-31 06:00 0.032 0.026~0.077333
Satsuma-sendai monitoring center Satsuma-sendai City 2013-05-31 06:00 0.043 0.039167~0.0875
Kagoshima 2011-09-01 09:00 0.036 0.0306~0.0943
Saga 2011-08-29 09:00 0.040 0.037~0.086
Kumamoto 2011-04-10 17:00 0.027 0.021~0.067
Fukuoka 2011-08-18 09:00 0.036 0.034~0.079
Miyazaki 2011-08-18 09:00 0.026 0.0243~0.0664
Oita 2011-08-29 09:00 0.050 0.048~0.085
Yamaguchi 2011-08-18 09:00 0.092 0.084~0.128
Taisei Ikata Town 2013-05-31 06:00 0.022 0.02~0.045167
Kashu Ikata Town 2013-05-31 06:00 0.024 0.022667~0.069833
Kucho Ikata Town 2013-05-31 05:10 0.023 0.021333~0.061667
Kuchogoshi Ikata Town 2013-05-31 06:00 0.018 0.015~0.057667
Toyonoura Ikata Town 2013-05-31 06:00 0.012 0.0105~0.0595
Kawanagata Ikata Town 2013-05-31 06:00 0.024 0.02~0.060167
Ikatagoshi Ikata Town 2013-05-31 06:00 0.019 0.017333~0.056833
Minatoura Ikata Town 2013-05-31 06:00 0.016 0.014~0.051833
Hiroshima 2011-04-10 17:00 0.046 0.035~0.069
Ehime 2011-08-18 09:00 0.048 0.045~0.074
Tayu Matsue City 2013-05-31 06:00 0.043 0.039333~0.092667
Koura Matsue City 2013-05-31 06:00 0.041 0.036167~0.105833
Kataku Matsue City 2013-05-31 06:00 0.043 0.036833~0.088833
Sadahongou Matsue City 2013-05-31 06:00 0.030 0.021~0.0995
Hukada-kita Matsue City 2013-05-31 06:00 0.028 0.019~0.081833
Nishi-hamasada Matsue City 2013-05-31 06:00 0.047 0.027667~0.111167
Kita-koubu Matsue City 2013-05-31 06:00 0.037 0.021833~0.103833
Mitsu Matsue City 2013-05-31 06:00 0.041 0.03~0.088667
Shimane 2011-08-18 09:00 0.065 0.036~0.11
Kou Itimatsu Suetsugu 2013-05-31 06:00 0.032 0.022833~0.085
Kami-koubu Matsue City 2013-05-31 06:00 0.037 0.0185~0.096833
Owashi Matsue City 2013-05-31 06:00 0.037 0.0325~0.094667
Kochi 2011-08-18 09:00 0.027 0.023~0.076
Okayama 2011-08-18 09:00 0.049 0.043~0.104
Kagawa 2011-08-18 09:00 0.054 0.051~0.077
Kijiyama Misasa Town 2014-09-19 09:30 0.050 0.0145~0.0925
Tottori 2011-08-18 09:00 0.041 0.033~0.079
Ningyotoge Kagamino Town 2013-05-31 06:00 0.062 0.018667~0.099333
Ten-no Kagamino Town 2013-05-31 06:00 0.056 0.022333~0.119
Akawase Kagamino Town 2013-05-31 06:00 0.047 0.0175~0.076167
Tokushima 2011-08-18 09:00 0.040 0.037~0.067
Wakayama 2011-09-05 09:00 0.031 0.031~0.056
Hyogo 2011-04-10 17:00 0.037 0.035~0.076
Izumisano municipal Hineno primary scool Station 2013-05-31 06:00 0.042 0.041~0.080167
Osaka prefectural Hineno high scool Station 2013-05-31 06:00 0.035 0.035167~0.089
Izumisano municipal Hineno filtration plant Station 2013-05-31 06:00 0.040 0.042667~0.100167
Osaka prefectural Sano supporting school Station 2013-05-31 06:00 0.038 0.0345~0.097
Kumatori town Nishi primary school Station 2013-05-31 06:00 0.051 0.052333~0.092833
Izumisano municipal Oike athletic field Station 2013-05-31 06:00 0.055 0.048667~0.104667
Osaka prefectural Kumatori off-site-center Station 2013-05-31 06:00 0.042 0.044333~0.092333
Atom-kyoudou nursery school Station 2013-05-31 06:00 0.051 0.053833~0.1005
Kumatori town Minami primary school Station 2013-05-31 06:00 0.048 0.048167~0.1065
Yamanotedai-No.1 Park Station 2013-05-31 06:00 0.051 0.05~0.099333
Kumatori Town office Station 2013-05-31 06:00 0.036 0.039333~0.076167
Osaka 2011-04-10 17:00 0.042 0.042~0.061
Kurahashi Maizuru City 2014-09-19 09:30 0.049 0.036~0.093333
Higashiosaka municipal Kamikosaka primary scool Station 2013-05-31 06:00 0.043 0.046167~0.0775
South point of Kinki University Atomic Energy Research Instirute Station 2013-05-31 06:00 0.054 0.054333~0.0915
North point of Kinki University Atomic Energy Research Instirute Station 2013-05-31 06:00 0.049 0.055167~0.077667
The athletic field Station of Kinki University 2013-05-31 06:00 0.038 0.0395~0.073833
Ibaraki-city Environment 2011-10-15 00:49 0.044 0.114 (Japan mean)
Okayasu Maizuru City 2014-09-19 09:30 0.036 0.025333~0.1115
Shiokumi Maizuru City 2014-09-19 09:30 0.036 0.021~0.168667
Oyama Maizuru City 2014-09-19 09:30 0.031 0.019~0.097667
Kichisaka Maizuru City 2014-09-19 09:30 0.036 0.022667~0.1355
Yamanaka Takahama Town 2013-05-31 06:00 0.027 0.011~0.108833
Oitomi Ayabe City 2014-09-19 09:30 0.043 0.024~0.1175
Kounoura Takahama Town 2013-05-31 06:00 0.029 0.020333~0.084333
Otomi Takahama Town 2013-05-31 06:00 0.044 0.035~0.098
Ogurui Takahama Town 2013-05-31 06:00 0.040 0.028833~0.087333
Nara 2011-08-18 09:00 0.050 0.046~0.08
Nagai Ohi Town 2013-05-31 06:00 0.035 0.024167~0.098667
Kyoto 2011-08-18 09:00 0.038 0.033~0.087
Hitsuhama Ohi Town 2013-05-31 06:00 0.029 0.028167~0.091167
Miyadome Ohi Town 2013-05-31 04:00 0.035 0.024667~0.081667
Obama Obama City 2013-05-31 06:00 0.038 0.0336~0.0835
Shiga 2011-08-18 09:00 0.033 0.031~0.061
Anojiri Obama City 2013-05-31 06:00 0.029 0.02075~0.08
Sakajiri Mihama Town 2013-05-31 06:00 0.059 0.030667~0.123667
Nyuu Mihama Town 2013-05-31 06:00 0.061 0.0344~0.106
Takenami Mihama Town 2013-05-31 06:00 0.070 0.0424~0.116333
Shiraki pass Tsuruga City 2013-05-31 06:00 0.078 0.0336~0.139833
Shiraki Tsuruga City 2013-05-31 06:00 0.078 0.0376~0.1335
Tateishi Tsuruga City 2013-05-31 06:00 0.069 0.0414~0.092167
Urasoko Tsuruga City 2013-05-31 06:00 0.073 0.0294~0.110833
Tsuruga Tsuruga City 2013-05-31 06:00 0.057 0.0272~0.0935
Kouno Minami-Echizen Town 2013-05-31 06:00 0.046 0.0344~0.084
Radiation at Tamaki-cho Mie Japan 2011-07-25 09:33 0.040 0.114 (Japan mean)
Fukui 2011-08-18 09:00 0.045 0.032~0.097
Mie 2011-08-18 09:00 0.046 0.0416~0.0789
The Observation point for comparison Tatsunokuchi 2013-05-31 06:00 0.043 0.020833~0.081
Kamoenai Kamoenai Village 2013-05-31 06:00 0.032 0.013~0.0905
Aichi 2011-08-18 09:00 0.042 0.035~0.074
Gifu 2011-08-29 09:00 0.062 0.057~0.11
Ishikawa 2011-08-18 09:00 0.049 0.0291~0.1275
Hokkaido 2011-08-18 09:00 0.030 0.02~0.105
Kayanuma Tomari Village 2013-05-31 06:00 0.033 0.014167~0.0955
Chatsu Tomari Village 2013-05-31 06:00 0.036 0.0155~0.107333
Herokaruusu Tomari Village 2013-05-31 06:00 0.034 0.009~0.107167
Horikappu Jinja Tomari Village 2013-05-31 06:00 0.031 0.013~0.103333
The Meteorological Obsevatory of kyowa Town 2013-05-31 06:00 0.035 0.01~0.1065
Hattari Kyowa Town 2013-05-31 06:00 0.037 0.017~0.112333
Kazanashi Shika Town 2013-05-31 06:00 0.048 0.041~0.112
Iwanai Iwanai Town 2013-05-31 06:00 0.036 0.016833~0.1155
Minami-Horoni Kyowa Town 2013-05-31 06:00 0.036 0.016333~0.099833
Fukura Shika Town 2013-05-31 06:00 0.040 0.0335~0.111833
Akasumi Shika Town 2013-05-31 06:00 0.047 0.04~0.1025
Shika Shika Town 2013-05-31 06:00 0.047 0.031167~0.119333
Goritoge Shika Town 2013-05-31 06:00 0.054 0.035~0.125167
Kumano Shika Town 2013-05-30 23:40 0.046 0.033667~0.116167
Noumi Shika Town 2013-05-31 06:00 0.051 0.0285~0.123833
Tsuchikawa Nanao City 2013-05-31 06:00 0.039 0.025~0.108833
Otsu Nanao City 2013-05-31 06:00 0.041 0.030333~0.098333
Toyama 2011-04-10 17:00 0.048 0.029~0.147
Daitou branch Kakegawa City 2013-05-31 06:00 0.039 0.0495~0.120667
Shirasuna Omaezaki City 2013-05-31 06:00 0.035 0.066~0.119167
Ogasa branch Kikugawa City 2013-05-31 06:00 0.043 0.075167~0.123333
Nakamachi Omaezaki City 2013-05-31 06:00 0.053 0.078~0.117833
Omaezaki City monitoring center 2013-05-31 06:00 0.038 0.074~0.1235
Sakuragaike community hall Omaezaki City 2013-05-31 06:00 0.045 0.07~0.120833
Uenohara Omaezaki City 2013-05-31 06:00 0.044 0.028~0.121667
Kusabue Omaezaki City 2013-05-31 06:00 0.037 0.074167~0.125833
Hiraba Omaezaki City 2013-05-31 06:00 0.034 0.0395~0.119167
Shinkango Omaezaki City 2013-05-31 06:00 0.036 0.074~0.1335
Hamaokakita primary school Omaezaki City 2013-05-31 06:00 0.041 0.069833~0.1225
Sakurasan Ward Omaezaki City 2013-05-31 06:00 0.038 0.063~0.115333
Shirowa primary school Omaezaki City 2013-05-31 00:20 0.044 0.069~0.118333
Jitougata primary school Makinohara City 2013-05-31 06:00 0.041 0.066167~0.114333
Shizuoka 2011-08-18 09:00 0.040 0.0281~0.0765
Sunagomata Higashidoori Village 2013-05-31 06:00 0.022 0.011~0.0935
Odanosawa Higashidoori Village 2013-05-31 06:00 0.016 0.0145~0.0745
Chikagawa Mutu City 2013-05-31 06:00 0.023 0.013833~0.076833
Oippe Higashidoori Village 2013-05-31 06:00 0.017 0.012333~0.064167
Nagano 2011-08-18 09:00 0.042 0.0299~0.0974
Tomari Rokkasho Village 2013-05-31 06:00 0.021 0.013833~0.104
Yokohama Town Office Yokohama Town 2013-05-31 06:00 0.023 0.01725~0.094167
Fukkoshi Yokohama Town 2013-05-31 06:00 0.023 0.014~0.064667
Yamanashi 2011-08-18 09:00 0.047 0.04~0.064
Obuchi Rokkasho Village 2013-05-31 06:00 0.023 0.012~0.074333
Hiranuma Rokkasho Village 2013-05-31 00:10 0.024 0.018~0.061833
Chitose-daira Rokkasho Village 2013-05-31 06:00 0.023 0.014~0.066667
Noheji Town Office Noheji Town 2013-05-31 06:00 0.032 0.011167~0.059
Aomori Aomori City 2013-05-31 06:00 0.027 0.014~0.068833
Aomori 2011-08-18 09:00 0.029 0.017~0.102
Touhoku Branch office Touhoku Town 2013-05-31 06:00 0.017 0.011~0.053833
Touhoku Town office Touhoku Town 2013-05-31 06:00 0.017 0.012~0.249
Misawa City hall Misawa City 2013-05-31 06:00 0.021 0.017~0.1335
Kashiwazaki-shigai Kashiwazaki City 2013-05-31 06:00 0.042 0.026333~0.0935
Arahama Kashiwazaki City 2013-05-31 06:00 0.038 0.0225~0.1015
Doai Kashiwazaki City 2013-05-31 06:00 0.039 0.0195~0.0955
Power Station- 2013-05-31 06:00 0.034 0.014~0.1085
Shimo-Takamachi Kariwa Village 2013-05-31 06:00 0.040 0.019~0.108667
Power Station-South 2013-05-31 06:00 0.036 0.012167~0.111167
Miyagawa Kashiwazaki City 2013-05-31 00:50 0.039 0.025833~0.0985
Kariwa Kariwa Village 2013-05-31 06:00 0.037 0.019~0.105167
Katsuyama Kariwa Village 2013-05-31 06:00 0.037 0.017333~0.1015
Kariwa Kariwa Village 2013-05-31 06:00 0.038 0.025~0.099833
Nishiyama Kashiwazaki City 2013-05-31 06:00 0.040 0.016833~0.132333
kanagawa 2011-04-10 17:00 0.058 0.035~0.069
Nagasawa Yokosuka City 2013-05-31 06:00 0.038 0.031~0.065333
Hairando Yokosuka City 2013-05-31 06:00 0.039 0.022333~0.07
Nishihemi Yokosuka City 2013-05-31 06:00 0.036 0.024833~0.053333
Sahara Yokosuka City 2013-05-31 06:00 0.038 0.024167~0.061833
Kurihama Yokosuka City 2013-05-31 06:00 0.035 0.0245~0.066833
Funagura Yokosuka City 2013-05-31 06:00 0.039 0.029~0.066
Hinode Town Yokosuka City 2013-05-31 06:00 0.034 0.026667~0.044
Uraga Yokosuka City 2013-05-31 06:00 0.041 0.024167~0.055833
Gunma 2011-04-10 17:00 0.041 0.017~0.045
Geiger Counter Feeds from Asao Kawasaki 2013-04-29 03:50 0.034 0.114 (Japan mean)
Niigata 2011-08-18 09:00 0.047 0.031~0.153
Akita 2011-08-18 09:00 0.060 0.022~0.086
Oshima Kawasaki Ward 2013-05-31 06:00 0.045 0.032667~0.071167
Shiohama Kawasaki Ward 2013-05-31 06:00 0.049 0.038333~0.074667
Chidori Kawasaki Ward 2013-05-31 06:00 0.036 0.02~0.063833
Tonomachi Kawasaki Ward 2013-05-31 06:00 0.032 0.026667~0.112333
Environment Feeds from Ohta 2013-04-30 09:20 0.051 0.114 (Japan mean)
Ukishima Kawasaki Ward 2013-05-31 06:00 0.048 0.031667~0.2175
Tokyo 2011-04-10 17:00 0.083 0.028~0.079
Saitama 2011-04-10 17:00 0.064 0.031~0.06
Iwate 2011-08-18 09:00 0.045 0.014~0.084
Chiba 2011-04-10 17:00 0.056 0.022~0.044
Radiation dose in KEK, Tsukuba 2013-04-27 15:20 0.040 0.114 (Japan mean)
Tochigi 2011-04-10 17:00 0.074 0.03~0.067
Kamitoda Hokota City 2013-05-31 06:00 0.065 0.035833~0.061667
Tokushuku Hokota City 2013-05-31 06:00 0.065 0.032667~0.055667
Radiation via www.houshasen-pref-ibaraki.jp (unofficial information) 2011-07-14 13:37 0.157 0.114 (Japan mean)
Ebisawa Ibaraki Town 2013-05-31 06:00 0.067 0.0418~0.1922
Momiyama Hokota City 2013-05-31 06:00 0.073 0.037167~0.088167
Tsukuriya Hokota City 2013-05-31 06:00 0.089 0.039833~0.074167
Yatabe Ibaraki Town 2013-05-31 06:00 0.062 0.036~0.060167
Araji Hokota City 2013-05-31 06:00 0.075 0.0425~0.074333
Tasaki Hokota City 2013-05-31 06:00 0.068 0.032167~0.066167
Radiation dose at JAEA Oarai (P15) 2011-07-14 13:36 0.243 0.114 (Japan mean)
Ibaraki 2011-04-10 17:00 0.147 0.036~0.056
Radiation dose at JAEA Oarai (P1) 2011-07-14 13:36 0.190 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 (P14) 2011-07-14 13:36 0.238 0.114 (Japan mean)
Radiation dose at JAEA Oarai (P2) 2013-04-27 23:20 0.031 0.114 (Japan mean)
Nemoto Hitachioomiya City 2013-05-31 06:00 0.080 0.037~0.082667
Yoshizawa Mito City 2013-05-31 06:00 0.051 0.039167~0.063667
Radiation dose at JAEA Oarai (P13) 2011-07-14 13:36 0.232 0.114 (Japan mean)
Radiation dose at JAEA Oarai (P12) 2014-04-29 06:50 0.048 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 (P5) 2011-07-14 13:36 0.169 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 (P7) 2011-07-14 13:36 0.270 0.114 (Japan mean)
Ishikawa Mito City 2013-05-31 06:00 0.066 0.044~0.071667
Radiation via www.houshasen-pref-ibaraki.jp (unofficial information) 2011-07-14 13:36 0.123 0.114 (Japan mean)
Oba Mito City 2013-05-31 06:00 0.065 0.039~0.2305
Onuki Oarai Town 2013-05-31 06:00 0.070 0.033~0.081167
Isohama Oarai Town 2013-05-31 06:00 0.059 0.0375~0.070833
Horiguchi Hitachinaka City 2013-05-31 06:00 0.079 0.036667~0.077
Godai Naka City 2013-05-31 06:00 0.053 0.033333~0.060833
Radiation dose in Enoshima, Ojika 2011-07-14 13:36 0.064 0.114 (Japan mean)
Yanagisawa Hitachinaka City 2013-05-31 06:00 0.066 0.035333~0.062833
Radiation dose in Terama, Ojika 2011-07-14 13:36 0.068 0.114 (Japan mean)
Kounosu Naka City 2013-05-31 06:00 0.048 0.025667~0.055
Sugaya Naka City 2013-05-31 06:00 0.083 0.042167~0.107667
Uridura Naka City 2013-05-31 06:00 0.055 0.037667~0.063
Yamagata 2011-08-18 09:00 0.044 0.025~0.082
Radiation via www.houshasen-pref-ibaraki.jp (unofficial information) 2011-07-14 13:36 0.127 0.114 (Japan mean)
Nemoto Hitachioomiya City 2013-05-31 06:00 0.048 0.032833~0.071167
Radiation via www.houshasen-pref-ibaraki.jp (unofficial information) 2011-07-14 13:36 0.077 0.114 (Japan mean)
Sawa Hitachinaka City 2013-05-31 06:00 0.063 0.032333~0.061333
Mawatari Hitachinaka City 2013-05-31 06:00 0.073 0.044833~0.078167
Hitachinaka Hitachinaka City 2013-05-31 06:00 0.098 0.040167~0.077333
Ajigaura Hitachinaka City 2013-05-31 06:00 0.070 0.0425~0.073333
Kadobe Naka City 2013-05-31 06:00 0.053 0.034833~0.149667
Yoriiso Ishinomaki City 2013-05-31 06:00 0.086 0.012~0.027167
Yokobori Naka City 2013-05-31 06:00 0.057 0.035833~0.0705
Onagawa Onagawa Town 2013-05-31 06:00 0.071 0.01~0.024
Radiation dose in Koyadori, Ojika 2011-07-14 13:36 0.075 0.114 (Japan mean)
Koyadori Onagawa Town 2013-05-31 06:00 0.094 0.017167~0.034
Radiation dose in Onagawa (MP-1) 2011-07-14 13:36 0.100 0.114 (Japan mean)
Radiation dose in Onagawa (MP-6) 2011-07-14 13:36 0.110 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-2) 2011-07-14 13:36 0.160 0.114 (Japan mean)
Radiation dose in Onagawa (MP-3) 2011-07-14 13:36 0.091 0.114 (Japan mean)
Nukada Naka City 2013-05-31 06:00 0.056 0.037833~0.066
Oshinobe Tokai Village 2013-05-31 06:00 0.060 0.040833~0.070167
Kume Hitachiota City 2013-05-31 06:00 0.050 0.035833~0.061833
Funaishikawa Tokai Village 2013-05-31 00:30 0.069 0.0425~0.073
Radiation via www.houshasen-pref-ibaraki.jp (unofficial information) 2011-07-14 13:36 0.124 0.114 (Japan mean)
Motokomezaki Naka City 2013-05-31 06:00 0.057 0.029167~0.059
Muramatsu Tokai Village 2013-05-31 06:00 0.073 0.044333~0.075167
Isobe Hitachiota City 2013-05-31 06:00 0.059 0.042~0.346
Ishigami Tokai Village 2013-05-31 06:00 0.073 0.042167~0.067667
Toyooka Tokai Village 2013-05-31 06:00 0.073 0.0465~0.0745
Mayumi Hitachiota City 2013-05-31 06:00 0.053 0.035833~0.063167
Kuji Hitachi City 2013-05-31 06:00 0.083 0.039~0.176
Onuma Hitachi City 2013-05-31 06:00 0.076 0.0365~0.065667
Radiation dose at Ose administration center, Koriyama 2011-07-14 13:36 0.560 0.114 (Japan mean)
Radiation dose at Iwane Fureai Plaza, Motomiya 2011-07-13 14:16 1.180 0.114 (Japan mean)
Radiation dose at Tohoku University 2013-04-28 07:00 0.037 0.114 (Japan mean)
Sendai (Miyagi) 2011-09-07 09:00 0.060 0.0176~0.0513
Radiation dose at Koriyama city office, Koriyama 2011-07-14 13:36 0.930 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 at Agricultural center, Koriyama 2011-07-14 13:36 1.080 0.114 (Japan mean)
Radiation dose at Motomiya city office, Motomiya 2011-05-10 10:05 0.920 0.114 (Japan mean)
Fukushima [1] (distance from Fukushima I: 60 km) 2011-09-28 13:21 0.600 0.037~0.071
Radiation dose in Natori 2011-07-14 13:36 0.130 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 Iwanuma 2011-07-14 13:36 0.190 0.114 (Japan mean)
Radiation dose at Date city office, Date 2011-05-09 16:35 1.410 0.114 (Japan mean)
Fukushima [2] (distance from Fukushima I: 55 km) 2011-09-28 09:05 1.200 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 in Kakuda 2011-07-14 13:36 0.260 0.114 (Japan mean)
Radiation dose in Watari 2011-07-14 13:36 0.230 0.114 (Japan mean)
Radiation dose at Tsukidatemachi kamitedo, Date 2011-05-09 16:35 2.000 0.114 (Japan mean)
Radiation dose at Tamokami elementary school, Koriyama 2011-07-14 13:36 0.210 0.114 (Japan mean)
Fukushima [78] (distance from Fukushima I: 45 km) 2011-09-28 15:00 0.500 0.037~0.071
Radiation dose in Marumori 2011-07-14 13:36 0.090 0.114 (Japan mean)
Fukushima [4] (distance from Fukushima I: 50 km) 2011-09-28 09:02 0.700 0.037~0.071
Fukushima [10] (distance from Fukushima I: 40 km) 2011-09-28 10:46 0.500 0.037~0.071
Fukushima [11] (distance from Fukushima I: 40 km) 2011-09-28 13:21 0.800 0.037~0.071
Fukushima [52] (distance from Fukushima I: 40 km) 2011-08-12 15:05 0.200 0.037~0.071
Fukushima [20] (distance from Fukushima I: 45 km) 2011-09-28 12:09 0.400 0.037~0.071
Fukushima [12] (distance from Fukushima I: 40 km) 2011-05-15 13:23 0.300 0.037~0.071
Fukushima [63] (distance from Fukushima I: 45 km) 2011-08-12 15:14 1.200 0.037~0.071
Fukushima [51] (distance from Fukushima I: 40 km) 2011-08-12 14:20 0.200 0.037~0.071
Radiation dose in Yamamoto 2011-07-14 13:36 0.260 0.114 (Japan mean)
Fukushima [23] (distance from Fukushima I: 35 km) 2011-09-28 12:02 0.500 0.037~0.071
Fukushima [13] (distance from Fukushima I: 40 km) 2011-09-28 09:39 0.200 0.037~0.071
Fukushima [14] (distance from Fukushima I: 35 km) 2011-09-28 09:53 0.200 0.037~0.071
Fukushima [22] (distance from Fukushima I: 35 km) 2011-09-28 11:53 0.300 0.037~0.071
Fukushima [42] (distance from Fukushima I: 30 km) 2011-09-28 08:36 0.700 0.037~0.071
Fukushima [3] (distance from Fukushima I: 45 km) 2011-09-28 10:06 2.000 0.037~0.071
Fukushima [15] (distance from Fukushima I: 35 km) 2011-09-28 10:04 0.500 0.037~0.071
Fukushima [62] (distance from Fukushima I: 40 km) 2011-08-12 14:50 4.500 0.037~0.071
Fukushima [75] (distance from Fukushima I: 45 km) 2011-09-28 16:50 0.100 0.037~0.071
Fukushima [6] (distance from Fukushima I: 45 km) 2011-05-13 11:39 0.800 0.037~0.071
Fukushima [33] (distance from Fukushima I: 30 km) 2011-09-28 09:53 12.500 0.037~0.071
Fukushima [61] (distance from Fukushima I: 40 km) 2011-08-12 14:41 3.500 0.037~0.071
Fukushima [32] (distance from Fukushima I: 30 km) 2011-09-28 10:33 16.100 0.037~0.071
Fukushima [7] (distance from Fukushima I: 45 km) 2011-09-28 11:07 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 [34] (distance from Fukushima I: 30 km) 2011-09-28 11:24 4.400 0.037~0.071
Fukushima [5] (distance from Fukushima I: 45 km) 2011-09-28 10:44 0.300 0.037~0.071
Fukushima [79] (distance from Fukushima I: 40 km) 2011-09-28 10:58 7.300 0.037~0.071
Fukushima [74] (distance from Fukushima I: 35 km) 2011-06-16 10:52 0.200 0.037~0.071
Fukushima [21] (distance from Fukushima I: 30 km) 2011-09-28 11:45 1.800 0.037~0.071
Fukushima [73] (distance from Fukushima I: 35 km) 2011-09-28 11:21 0.400 0.037~0.071
Fukushima [77] (distance from Fukushima I: 25 km) 2011-05-22 13:01 1.300 0.037~0.071
Fukushima [76] (distance from Fukushima I: 25 km) 2011-09-28 11:12 0.300 0.037~0.071
Fukushima [72] (distance from Fukushima I: 30 km) 2011-09-28 11:33 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 [80] (distance from Fukushima I: 25 km) 2011-09-28 16:00 0.100 0.037~0.071
Fukushima [41] (distance from Fukushima I: 20 km) 2011-09-28 09:49 0.500 0.037~0.071
Fukushima [71] (distance from Fukushima I: 25 km) 2011-09-28 11:50 0.400 0.037~0.071
Futatsunuma Hirono Town 2013-05-31 06:00 0.195 0.036333~0.1
Fukushima [44] (distance from Fukushima I: 30 km) 2011-09-28 13:09 0.200 0.037~0.071
Yamadaoka Naraha Town 2013-05-31 06:00 0.222 0.038167~0.088667
Fukushima [46] (distance from Fukushima I: 20 km) 2011-09-28 09:15 4.300 0.037~0.071
Matsudate Naraha Town 2013-05-31 06:00 0.741 0.035~0.104333
Shigeoka Naraha Town 2013-05-31 06:00 0.543 0.0375~0.115333
Kami-kooriyama Tomioka Town 2013-05-31 06:00 1.181 0.029167~0.076667
Fukushima [45] (distance from Fukushima I: 20 km) 2011-09-28 13:35 0.500 0.037~0.071
Fukushima II MP7 2011-12-27 15:00 0.500 0.114 (Japan mean)
Fukushima II MP6 2011-12-27 15:00 0.800 0.114 (Japan mean)
Fukushima II MP5 2011-12-27 15:00 1.300 0.114 (Japan mean)
Fukushima II MP4 2011-12-27 15:00 1.400 0.114 (Japan mean)
Fukushima II MP3 2011-12-27 15:00 1.600 0.114 (Japan mean)
Fukushima II MP2 2011-12-27 15:00 1.100 0.114 (Japan mean)
Fukushima II MP1 2011-12-27 15:00 1.600 0.114 (Japan mean)
Shimo-Kooriyama Tomioka Town 2013-05-31 06:00 1.212 0.035833~0.097667
Namie Namie Town 2013-05-31 06:00 0.774 0.039167~0.084167
Tomioka Tomioka Town 2013-05-31 06:00 2.535 0.034667~0.098333
Kiyohashi Namie Town 2013-05-31 06:00 0.289 0.035333~0.073833
Yonomori Tomioka Town 2013-05-31 06:00 3.066 0.036333~0.091333
kami-Hatori Futaba Town 2013-05-31 06:00 1.606 0.034~0.086833
Ono Okuma Town 2013-05-31 06:00 3.408 0.037~0.088333
Yamada Futaba Town 2013-05-31 06:00 16.230 0.038~0.095667
Shinzan Futaba Town 2013-05-31 06:00 4.226 0.037167~0.080167
Mukaihata Okuma Town 2013-05-31 06:00 4.843 0.0345~0.093833
Kooriyama Futaba Town 2013-05-31 06:00 1.063 0.035~0.089333
Fukushima I MP2 2011-12-27 15:00 19.000 0.114 (Japan mean)
Fukushima I MP1 2011-12-27 15:00 4.000 0.114 (Japan mean)
Fukushima I MP5 2011-12-27 15:00 14.000 0.114 (Japan mean)
Fukushima I MP6 2011-12-27 15:00 33.000 0.114 (Japan mean)
Fukushima I MP3 2011-12-27 15:00 12.000 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 I MP8 2011-12-27 15:00 68.000 0.114 (Japan mean)
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