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
Kurahashi Maizuru City	2015-03-31 02:50	0.048	0.036~0.093333
Shiokumi Maizuru City	2015-03-31 02:50	0.036	0.021~0.168667
Oitomi Ayabe City	2015-03-31 02:50	0.044	0.024~0.1175
Okayasu Maizuru City	2015-03-31 02:50	0.037	0.025333~0.1115
Oyama Maizuru City	2015-03-31 02:50	0.032	0.019~0.097667
Kijiyama Misasa Town	2015-03-31 02:50	0.049	0.0145~0.0925
Takasimamati	2015-03-31 02:50	0.024	0.01725~0.074333
Kichisaka Maizuru City	2015-03-31 02:50	0.037	0.022667~0.1355
Radiation dose at JAEA Oarai (P12)	2014-04-29 06:50	0.048	0.114 (Japan mean)
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
Hinode Town Yokosuka City	2013-05-31 06:00	0.034	0.026667~0.044
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
Shiohama Kawasaki Ward	2013-05-31 06:00	0.049	0.038333~0.074667
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
Momiyama Hokota City	2013-05-31 06:00	0.073	0.037167~0.088167
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
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
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
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
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
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
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
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
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 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
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
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
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
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
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
Funagura Yokosuka City	2013-05-31 06:00	0.039	0.029~0.066
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
Chidori Kawasaki Ward	2013-05-31 06:00	0.036	0.02~0.063833
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
Oshima Kawasaki Ward	2013-05-31 06:00	0.045	0.032667~0.071167
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
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
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
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
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
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
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 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
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
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
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
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
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
Yamanotedai-No.1 Park Station	2013-05-31 06:00	0.051	0.05~0.099333
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
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
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
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
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
Nishihemi Yokosuka City	2013-05-31 06:00	0.036	0.024833~0.053333
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
Ukishima Kawasaki Ward	2013-05-31 06:00	0.048	0.031667~0.2175
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
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
Kucho Ikata Town	2013-05-31 05:10	0.023	0.021333~0.061667
Miyadome Ohi Town	2013-05-31 04:00	0.035	0.024667~0.081667
Miyagawa Kashiwazaki City	2013-05-31 00:50	0.039	0.025833~0.0985
Funaishikawa Tokai Village	2013-05-31 00:30	0.069	0.0425~0.073
Shirowa primary school Omaezaki City	2013-05-31 00:20	0.044	0.069~0.118333
Hiranuma Rokkasho Village	2013-05-31 00:10	0.024	0.018~0.061833
Kumano Shika Town	2013-05-30 23:40	0.046	0.033667~0.116167
Environment Feeds from Ohta	2013-04-30 09:20	0.051	0.114 (Japan mean)
Geiger Counter Feeds from Asao Kawasaki	2013-04-29 03:50	0.034	0.114 (Japan mean)
Radiation dose at Tohoku University	2013-04-28 07:00	0.037	0.114 (Japan mean)
Radiation dose at JAEA Oarai (P2)	2013-04-27 23:20	0.031	0.114 (Japan mean)
Radiation dose in KEK, Tsukuba	2013-04-27 15:20	0.040	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)
Ibaraki-city Environment	2011-10-15 00:49	0.044	0.114 (Japan mean)
Fukushima [75] (distance from Fukushima I: 45 km)	2011-09-28 16:50	0.100	0.037~0.071
Fukushima [80] (distance from Fukushima I: 25 km)	2011-09-28 16:00	0.100	0.037~0.071
Fukushima [78] (distance from Fukushima I: 45 km)	2011-09-28 15:00	0.500	0.037~0.071
Fukushima [45] (distance from Fukushima I: 20 km)	2011-09-28 13:35	0.500	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 [44] (distance from Fukushima I: 30 km)	2011-09-28 13:09	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 [23] (distance from Fukushima I: 35 km)	2011-09-28 12:02	0.500	0.037~0.071
Fukushima [22] (distance from Fukushima I: 35 km)	2011-09-28 11:53	0.300	0.037~0.071
Fukushima [71] (distance from Fukushima I: 25 km)	2011-09-28 11:50	0.400	0.037~0.071
Fukushima [21] (distance from Fukushima I: 30 km)	2011-09-28 11:45	1.800	0.037~0.071
Fukushima [72] (distance from Fukushima I: 30 km)	2011-09-28 11:33	0.300	0.037~0.071
Fukushima [34] (distance from Fukushima I: 30 km)	2011-09-28 11:24	4.400	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 [76] (distance from Fukushima I: 25 km)	2011-09-28 11:12	0.300	0.037~0.071
Fukushima [7] (distance from Fukushima I: 45 km)	2011-09-28 11:07	0.500	0.037~0.071
Fukushima [79] (distance from Fukushima I: 40 km)	2011-09-28 10:58	7.300	0.037~0.071
Fukushima [31] (distance from Fukushima I: 30 km)	2011-09-28 10:51	6.100	0.037~0.071
Fukushima [10] (distance from Fukushima I: 40 km)	2011-09-28 10:46	0.500	0.037~0.071
Fukushima [5] (distance from Fukushima I: 45 km)	2011-09-28 10:44	0.300	0.037~0.071
Fukushima [32] (distance from Fukushima I: 30 km)	2011-09-28 10:33	16.100	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 [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 [41] (distance from Fukushima I: 20 km)	2011-09-28 09:49	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 [46] (distance from Fukushima I: 20 km)	2011-09-28 09:15	4.300	0.037~0.071
Fukushima [2] (distance from Fukushima I: 55 km)	2011-09-28 09:05	1.200	0.037~0.071
Fukushima [4] (distance from Fukushima I: 50 km)	2011-09-28 09:02	0.700	0.037~0.071
Fukushima [42] (distance from Fukushima I: 30 km)	2011-09-28 08:36	0.700	0.037~0.071
Sendai (Miyagi)	2011-09-07 09:00	0.060	0.0176~0.0513
Wakayama	2011-09-05 09:00	0.031	0.031~0.056
Kagoshima	2011-09-01 09:00	0.036	0.0306~0.0943
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
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
Fukushima [63] (distance from Fukushima I: 45 km)	2011-08-12 15:14	1.200	0.037~0.071
Fukushima [52] (distance from Fukushima I: 40 km)	2011-08-12 15:05	0.200	0.037~0.071
Fukushima [62] (distance from Fukushima I: 40 km)	2011-08-12 14:50	4.500	0.037~0.071
Fukushima [61] (distance from Fukushima I: 40 km)	2011-08-12 14:41	3.500	0.037~0.071
Fukushima [51] (distance from Fukushima I: 40 km)	2011-08-12 14:20	0.200	0.037~0.071
Radiation at Tamaki-cho Mie Japan	2011-07-25 09:33	0.040	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 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 (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 via www.houshasen-pref-ibaraki.jp (unofficial information)	2011-07-14 13:36	0.124	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	0.123	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 via www.houshasen-pref-ibaraki.jp (unofficial information)	2011-07-14 13:36	0.077	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	0.127	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 dose at Iwane Fureai Plaza, Motomiya	2011-07-13 14:16	1.180	0.114 (Japan mean)
Fukushima [35] (distance from Fukushima I: 35 km)	2011-06-16 13:13	1.000	0.037~0.071
Fukushima [74] (distance from Fukushima I: 35 km)	2011-06-16 10:52	0.200	0.037~0.071
Fukushima [77] (distance from Fukushima I: 25 km)	2011-05-22 13:01	1.300	0.037~0.071
Fukushima [12] (distance from Fukushima I: 40 km)	2011-05-15 13:23	0.300	0.037~0.071
Fukushima [6] (distance from Fukushima I: 45 km)	2011-05-13 11:39	0.800	0.037~0.071
Radiation dose at Motomiya city office, Motomiya	2011-05-10 10:05	0.920	0.114 (Japan mean)
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)
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

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.