Station list Japan - absorbed dose rate

< V_max

< 10 * V_max

< 100 * V_max

> 100 * V_max

Stations: 357	Date UTC	Radiation μGy/h	V_min ~ V_max μGy/h
Okinawa	2011-08-29 09:00	0.024	0.0133~0.0575
Takasimamati	2013-05-24 23:50	0.024	0.01725~0.074333
Yorita Satsuma-sendai City	2013-05-24 23:50	0.030	0.026~0.083833
Kyoudomarisaki Karatsu City	2013-05-24 23:50	0.030	0.026~0.165
Ueno Satsuma-sendai City	2013-05-24 23:50	0.035	0.032~0.076333
Kodaira Satsuma-sendai City	2013-05-24 23:50	0.032	0.029~0.071667
Gumisaki Satsuma-sendai City	2013-05-24 23:50	0.028	0.007~0.067667
Minato Satsuma-sendai City	2013-05-24 23:50	0.034	0.0264~0.070833
Imamura Genkai Town	2013-05-24 23:50	0.030	0.025333~1.39833
Nagasaki	2011-08-18 09:00	0.028	0.027~0.069
Hirao Genkai Town	2013-05-24 23:50	0.031	0.027833~0.162333
Hokawaduura Genkai Town	2013-05-24 23:50	0.034	0.031~0.11775
Kushi Genkai Town	2013-05-24 23:50	0.032	0.028~0.1625
Sakibe Karatsu City	2013-05-24 23:50	0.032	0.028~0.154
Takae Satsuma-sendai City	2013-05-24 23:50	0.034	0.026~0.077333
Satsuma-sendai monitoring center Satsuma-sendai City	2013-05-24 23:50	0.045	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	2013-05-24 23:50	0.022	0.02~0.045167
Kashu Ikata Town	2013-05-24 23:50	0.024	0.022667~0.069833
Kucho Ikata Town	2013-05-24 23:50	0.023	0.021333~0.061667
Kuchogoshi Ikata Town	2013-05-24 23:50	0.017	0.015~0.057667
Toyonoura Ikata Town	2013-05-24 23:50	0.012	0.0105~0.0595
Kawanagata Ikata Town	2013-05-24 23:50	0.023	0.02~0.060167
Ikatagoshi Ikata Town	2013-05-24 23:50	0.019	0.017333~0.056833
Minatoura Ikata Town	2013-05-24 23:50	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	2013-05-24 23:50	0.043	0.039333~0.092667
Koura Matsue City	2013-05-24 23:50	0.041	0.036167~0.105833
Kataku Matsue City	2013-05-24 23:50	0.045	0.036833~0.088833
Sadahongou Matsue City	2013-05-24 23:50	0.031	0.021~0.0995
Hukada-kita Matsue City	2013-05-24 23:50	0.030	0.019~0.081833
Nishi-hamasada Matsue City	2013-05-24 23:50	0.053	0.027667~0.111167
Kita-koubu Matsue City	2013-05-24 23:50	0.038	0.021833~0.103833
Mitsu Matsue City	2013-05-24 23:50	0.042	0.03~0.088667
Shimane	2011-08-18 09:00	0.065	0.036~0.11
Kou Itimatsu Suetsugu	2013-05-24 23:50	0.035	0.022833~0.085
Kami-koubu Matsue City	2013-05-24 23:50	0.039	0.0185~0.096833
Owashi Matsue City	2013-05-24 23:50	0.039	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	2013-05-24 23:50	0.050	0.0145~0.0925
Tottori	2011-08-18 09:00	0.041	0.033~0.079
Ningyotoge Kagamino Town	2013-05-24 23:50	0.062	0.018667~0.099333
Ten-no Kagamino Town	2013-05-24 23:50	0.058	0.022333~0.119
Akawase Kagamino Town	2013-05-24 23:50	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	2013-05-24 23:50	0.043	0.041~0.080167
Osaka prefectural Hineno high scool Station	2013-05-24 23:50	0.036	0.035167~0.089
Izumisano municipal Hineno filtration plant Station	2013-05-24 23:50	0.042	0.042667~0.100167
Osaka prefectural Sano supporting school Station	2013-05-24 23:50	0.037	0.0345~0.097
Kumatori town Nishi primary school Station	2013-05-24 23:50	0.051	0.052333~0.092833
Izumisano municipal Oike athletic field Station	2013-05-24 23:50	0.055	0.048667~0.104667
Osaka prefectural Kumatori off-site-center Station	2013-05-24 23:50	0.043	0.044333~0.092333
Atom-kyoudou nursery school Station	2013-05-24 23:50	0.051	0.053833~0.1005
Kumatori town Minami primary school Station	2013-05-24 23:50	0.048	0.048167~0.1065
Yamanotedai-No.1 Park Station	2013-05-24 23:50	0.051	0.05~0.099333
Kumatori Town office Station	2013-05-24 23:50	0.035	0.039333~0.076167
Osaka	2011-04-10 17:00	0.042	0.042~0.061
Kurahashi Maizuru City	2013-05-24 23:50	0.051	0.036~0.093333
Higashiosaka municipal Kamikosaka primary scool Station	2013-05-24 23:50	0.044	0.046167~0.0775
South point of Kinki University Atomic Energy Research Instirute Station	2013-05-24 23:50	0.054	0.054333~0.0915
North point of Kinki University Atomic Energy Research Instirute Station	2013-05-24 23:50	0.051	0.055167~0.077667
The athletic field Station of Kinki University	2013-05-24 23:50	0.039	0.0395~0.073833
Ibaraki-city Environment	2011-10-15 00:49	0.044	0.114 (Japan mean)
Okayasu Maizuru City	2013-05-24 23:50	0.039	0.025333~0.1115
Shiokumi Maizuru City	2013-05-24 23:50	0.039	0.021~0.168667
Oyama Maizuru City	2013-05-24 23:50	0.033	0.019~0.097667
Kichisaka Maizuru City	2013-05-24 23:50	0.039	0.022667~0.1355
Yamanaka Takahama Town	2013-05-24 23:50	0.028	0.011~0.108833
Oitomi Ayabe City	2013-05-24 23:50	0.043	0.024~0.1175
Kounoura Takahama Town	2013-05-24 23:50	0.029	0.020333~0.084333
Otomi Takahama Town	2013-05-24 23:50	0.045	0.035~0.098
Ogurui Takahama Town	2013-05-24 23:50	0.042	0.028833~0.087333
Nara	2011-08-18 09:00	0.050	0.046~0.08
Nagai Ohi Town	2013-05-24 23:50	0.036	0.024167~0.098667
Kyoto	2011-08-18 09:00	0.038	0.033~0.087
Hitsuhama Ohi Town	2013-05-24 23:50	0.029	0.028167~0.091167
Miyadome Ohi Town	2013-05-24 23:50	0.035	0.024667~0.081667
Obama Obama City	2013-05-24 23:50	0.039	0.0336~0.0835
Shiga	2011-08-18 09:00	0.033	0.031~0.061
Anojiri Obama City	2013-05-24 23:50	0.031	0.02075~0.08
Sakajiri Mihama Town	2013-05-24 23:50	0.061	0.030667~0.123667
Nyuu Mihama Town	2013-05-24 23:50	0.060	0.0344~0.106
Takenami Mihama Town	2013-05-24 23:50	0.071	0.0424~0.116333
Shiraki pass Tsuruga City	2013-05-24 23:50	0.079	0.0336~0.139833
Shiraki Tsuruga City	2013-05-24 23:50	0.079	0.0376~0.1335
Tateishi Tsuruga City	2013-05-24 23:50	0.069	0.0414~0.092167
Urasoko Tsuruga City	2013-05-24 23:50	0.072	0.0294~0.110833
Tsuruga Tsuruga City	2013-05-24 23:50	0.058	0.0272~0.0935
Kouno Minami-Echizen Town	2013-05-24 23:50	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	2013-05-24 23:50	0.046	0.020833~0.081
Kamoenai Kamoenai Village	2013-05-24 23:50	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	2013-05-24 23:50	0.034	0.014167~0.0955
Chatsu Tomari Village	2013-05-24 23:50	0.036	0.0155~0.107333
Herokaruusu Tomari Village	2013-05-24 23:50	0.034	0.009~0.107167
Horikappu Jinja Tomari Village	2013-05-24 23:50	0.032	0.013~0.103333
The Meteorological Obsevatory of kyowa Town	2013-05-24 23:50	0.035	0.01~0.1065
Hattari Kyowa Town	2013-05-24 23:50	0.037	0.017~0.112333
Kazanashi Shika Town	2013-05-24 23:50	0.050	0.041~0.112
Iwanai Iwanai Town	2013-05-24 23:50	0.036	0.016833~0.1155
Minami-Horoni Kyowa Town	2013-05-24 23:50	0.037	0.016333~0.099833
Fukura Shika Town	2013-05-24 23:50	0.041	0.0335~0.111833
Akasumi Shika Town	2013-05-24 23:50	0.049	0.04~0.1025
Shika Shika Town	2013-05-24 23:50	0.050	0.031167~0.119333
Goritoge Shika Town	2013-05-24 23:50	0.055	0.035~0.125167
Kumano Shika Town	2013-05-24 23:50	0.047	0.033667~0.116167
Noumi Shika Town	2013-05-24 23:50	0.052	0.0285~0.123833
Tsuchikawa Nanao City	2013-05-24 23:50	0.041	0.025~0.108833
Otsu Nanao City	2013-05-24 23:50	0.043	0.030333~0.098333
Toyama	2011-04-10 17:00	0.048	0.029~0.147
Daitou branch Kakegawa City	2013-05-24 23:50	0.040	0.0495~0.120667
Shirasuna Omaezaki City	2013-05-24 23:50	0.035	0.066~0.119167
Ogasa branch Kikugawa City	2013-05-24 23:50	0.045	0.075167~0.123333
Nakamachi Omaezaki City	2013-05-24 23:50	0.053	0.078~0.117833
Omaezaki City monitoring center	2013-05-24 23:50	0.038	0.074~0.1235
Sakuragaike community hall Omaezaki City	2013-05-24 23:50	0.045	0.07~0.120833
Uenohara Omaezaki City	2013-05-24 23:50	0.044	0.028~0.121667
Kusabue Omaezaki City	2013-05-24 23:50	0.037	0.074167~0.125833
Hiraba Omaezaki City	2013-05-24 23:50	0.034	0.0395~0.119167
Shinkango Omaezaki City	2013-05-24 23:50	0.037	0.074~0.1335
Hamaokakita primary school Omaezaki City	2013-05-24 23:50	0.041	0.069833~0.1225
Sakurasan Ward Omaezaki City	2013-05-24 23:50	0.037	0.063~0.115333
Shirowa primary school Omaezaki City	2013-05-24 23:50	0.045	0.069~0.118333
Jitougata primary school Makinohara City	2013-05-24 23:50	0.041	0.066167~0.114333
Shizuoka	2011-08-18 09:00	0.040	0.0281~0.0765
Sunagomata Higashidoori Village	2013-05-24 23:50	0.025	0.011~0.0935
Odanosawa Higashidoori Village	2013-05-24 23:50	0.018	0.0145~0.0745
Chikagawa Mutu City	2013-05-24 23:50	0.025	0.013833~0.076833
Oippe Higashidoori Village	2013-05-24 23:50	0.019	0.012333~0.064167
Nagano	2011-08-18 09:00	0.042	0.0299~0.0974
Tomari Rokkasho Village	2013-05-24 23:50	0.025	0.013833~0.104
Yokohama Town Office Yokohama Town	2013-05-24 23:50	0.026	0.01725~0.094167
Fukkoshi Yokohama Town	2013-05-24 23:50	0.025	0.014~0.064667
Yamanashi	2011-08-18 09:00	0.047	0.04~0.064
Obuchi Rokkasho Village	2013-05-24 23:50	0.026	0.012~0.074333
Hiranuma Rokkasho Village	2013-05-24 23:50	0.025	0.018~0.061833
Chitose-daira Rokkasho Village	2013-05-24 23:50	0.025	0.014~0.066667
Noheji Town Office Noheji Town	2013-05-24 23:50	0.033	0.011167~0.059
Aomori Aomori City	2013-05-24 23:50	0.028	0.014~0.068833
Aomori	2011-08-18 09:00	0.029	0.017~0.102
Touhoku Branch office Touhoku Town	2013-05-24 23:50	0.019	0.011~0.053833
Touhoku Town office Touhoku Town	2013-05-24 23:50	0.017	0.012~0.249
Misawa City hall Misawa City	2013-05-24 23:50	0.022	0.017~0.1335
Kashiwazaki-shigai Kashiwazaki City	2013-05-24 23:50	0.042	0.026333~0.0935
Arahama Kashiwazaki City	2013-05-24 23:50	0.038	0.0225~0.1015
Doai Kashiwazaki City	2013-05-24 23:50	0.039	0.0195~0.0955
Power Station-	2013-05-24 23:50	0.036	0.014~0.1085
Shimo-Takamachi Kariwa Village	2013-05-24 23:50	0.040	0.019~0.108667
Power Station-South	2013-05-24 23:50	0.037	0.012167~0.111167
Miyagawa Kashiwazaki City	2013-05-24 23:50	0.038	0.025833~0.0985
Kariwa Kariwa Village	2013-05-24 23:50	0.037	0.019~0.105167
Katsuyama Kariwa Village	2013-05-24 23:50	0.037	0.017333~0.1015
Kariwa Kariwa Village	2013-05-24 23:50	0.039	0.025~0.099833
Nishiyama Kashiwazaki City	2013-05-24 23:50	0.041	0.016833~0.132333
kanagawa	2011-04-10 17:00	0.058	0.035~0.069
Nagasawa Yokosuka City	2013-05-24 23:50	0.038	0.031~0.065333
Hairando Yokosuka City	2013-05-24 23:50	0.039	0.022333~0.07
Nishihemi Yokosuka City	2013-05-24 23:50	0.035	0.024833~0.053333
Sahara Yokosuka City	2013-05-24 23:50	0.039	0.024167~0.061833
Kurihama Yokosuka City	2013-05-24 23:50	0.035	0.0245~0.066833
Funagura Yokosuka City	2013-05-24 23:50	0.040	0.029~0.066
Hinode Town Yokosuka City	2013-05-24 23:50	0.035	0.026667~0.044
Uraga Yokosuka City	2013-05-24 23:50	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	2013-05-24 23:50	0.045	0.032667~0.071167
Shiohama Kawasaki Ward	2013-05-24 23:50	0.049	0.038333~0.074667
Chidori Kawasaki Ward	2013-05-24 23:50	0.035	0.02~0.063833
Tonomachi Kawasaki Ward	2013-05-24 23:50	0.032	0.026667~0.112333
Environment Feeds from Ohta	2013-04-30 09:20	0.051	0.114 (Japan mean)
Ukishima Kawasaki Ward	2013-05-24 23:50	0.049	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	2013-05-24 23:50	0.066	0.035833~0.061667
Tokushuku Hokota City	2013-05-24 23:50	0.066	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	2013-05-24 23:50	0.068	0.0418~0.1922
Momiyama Hokota City	2013-05-24 23:50	0.073	0.037167~0.088167
Tsukuriya Hokota City	2013-05-24 23:50	0.090	0.039833~0.074167
Yatabe Ibaraki Town	2013-05-24 23:50	0.062	0.036~0.060167
Araji Hokota City	2013-05-24 23:50	0.075	0.0425~0.074333
Tasaki Hokota City	2013-05-24 23:50	0.069	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	2013-05-24 23:50	0.079	0.037~0.082667
Yoshizawa Mito City	2013-05-24 23:50	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)	2011-07-14 13:36	0.429	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	2013-05-24 23:50	0.064	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	2013-05-24 23:50	0.066	0.039~0.2305
Onuki Oarai Town	2013-05-24 23:50	0.071	0.033~0.081167
Isohama Oarai Town	2013-05-24 23:50	0.059	0.0375~0.070833
Horiguchi Hitachinaka City	2013-05-24 23:50	0.080	0.036667~0.077
Godai Naka City	2013-05-24 23:50	0.051	0.033333~0.060833
Radiation dose in Enoshima, Ojika	2011-07-14 13:36	0.064	0.114 (Japan mean)
Yanagisawa Hitachinaka City	2013-05-24 23:50	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	2013-05-24 23:50	0.048	0.025667~0.055
Sugaya Naka City	2013-05-24 23:50	0.083	0.042167~0.107667
Uridura Naka City	2013-05-24 23:50	0.054	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	2013-05-24 23:50	0.049	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	2013-05-24 23:50	0.064	0.032333~0.061333
Mawatari Hitachinaka City	2013-05-24 23:50	0.073	0.044833~0.078167
Hitachinaka Hitachinaka City	2013-05-24 23:50	0.100	0.040167~0.077333
Ajigaura Hitachinaka City	2013-05-24 23:50	0.071	0.0425~0.073333
Kadobe Naka City	2013-05-24 23:50	0.053	0.034833~0.149667
Yoriiso Ishinomaki City	2013-05-24 23:50	0.084	0.012~0.027167
Yokobori Naka City	2013-05-24 23:50	0.055	0.035833~0.0705
Onagawa Onagawa Town	2013-05-24 23:50	0.070	0.01~0.024
Radiation dose in Koyadori, Ojika	2011-07-14 13:36	0.075	0.114 (Japan mean)
Koyadori Onagawa Town	2013-05-24 23:50	0.095	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	2013-05-24 23:50	0.056	0.037833~0.066
Oshinobe Tokai Village	2013-05-24 23:50	0.063	0.040833~0.070167
Kume Hitachiota City	2013-05-24 23:50	0.049	0.035833~0.061833
Funaishikawa Tokai Village	2013-05-24 23:50	0.068	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	2013-05-24 23:50	0.057	0.029167~0.059
Muramatsu Tokai Village	2013-05-24 23:50	0.073	0.044333~0.075167
Isobe Hitachiota City	2013-05-24 23:50	0.060	0.042~0.346
Ishigami Tokai Village	2013-05-24 23:50	0.070	0.042167~0.067667
Toyooka Tokai Village	2013-05-24 23:50	0.074	0.0465~0.0745
Mayumi Hitachiota City	2013-05-24 23:50	0.052	0.035833~0.063167
Kuji Hitachi City	2013-05-24 23:50	0.083	0.039~0.176
Onuma Hitachi City	2013-05-24 23:50	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	2013-05-24 23:50	0.202	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	2013-05-24 23:50	0.226	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	2013-05-24 23:50	0.774	0.035~0.104333
Shigeoka Naraha Town	2013-05-24 23:50	0.580	0.0375~0.115333
Kami-kooriyama Tomioka Town	2013-05-24 23:50	1.208	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	2013-05-24 23:50	1.255	0.035833~0.097667
Namie Namie Town	2013-05-24 23:50	0.790	0.039167~0.084167
Tomioka Tomioka Town	2013-05-24 23:50	2.609	0.034667~0.098333
Kiyohashi Namie Town	2013-05-24 23:50	0.293	0.035333~0.073833
Yonomori Tomioka Town	2013-05-24 23:50	3.137	0.036333~0.091333
kami-Hatori Futaba Town	2013-05-24 23:50	1.700	0.034~0.086833
Ono Okuma Town	2013-05-24 23:50	3.505	0.037~0.088333
Yamada Futaba Town	2013-05-24 23:50	16.980	0.038~0.095667
Shinzan Futaba Town	2013-05-24 23:50	4.421	0.037167~0.080167
Mukaihata Okuma Town	2013-05-24 23:50	5.026	0.0345~0.093833
Kooriyama Futaba Town	2013-05-24 23:50	1.057	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 V_max-V_min	Minimum value (V_min) and maximum value (V_max) 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 (V_min) and maximum value (V_max) 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 V_max. The accumulation starts with the first available value of the data set after 13.3.2011 (see missing values above).

Colour scale:

< V_max

< 10 * V_max

< 100 * V_max

> 100 * V_max

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 (W_R ).
The radiation weighting factor W_R 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 ⋅ W_R

where Sv=sievert, Gy=gray, W_R =weighting factor specific to each type of radiation and tissue.

Radiation weighting factor (W_R ):

For x-rays and gamma rays and electrons absorbed by human tissue, W_R is 1. For alpha particles it is 20. To compute Sieverts from Grays, simply multiply by W_R . This is obviously a simplification. The radiation weighting factor W_R approximates what otherwise would be very complicated computations. The values for W_R 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:

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.