This is the historical info, deleted from the main page to save space.

‎2011-04-22 8:53: 14 micro-Roentgens/h (γ), (~14 cpm). 0.166 micro-Sieverts/h on Geiger counter (α, β & γ). Location: Forested area of Yoyogi park, Harajukui, Tokyo. Weather: Overcast, winds from the south. Safe.

2011-04-21 15:26: 8 micro-Roentgens/h (γ), (~8 cpm). 0.114 micro-Sieverts/h on Geiger counter (α, β & γ). Location: Roof of Metropolis office, Minato-ku. Weather: overcast, winds from the south east. Safe.

‎2011-04-20 9:32: 13 micro-Roentgens/h (γ), (~13 cpm). 0.155 micro-Sieverts/h on Geiger counter (α, β & γ). Location: Roppongi Hills, Minato-ku. Weather: clear, winds from the north. Safe.

‎2011-04-18 8:33: 15 μR/h scintillator (γ), (~15 cpm). 0.228 μSv/h Geiger counter (α, β & γ). Location: Yoyogi park, Harajuku, Tokyo. Weather: mostly cloudy, wind from the north. Safe.

2011-04-17 17:05: 20 micro-Roentgens/h (~20 cpm) on scintillator. 0.228 micro-Sieverts/h on Geiger counter. Location: Kita-ku, Tokyo. Weather: clear, winds from the south. Safe.

‎2011-04-15 9:23: 13 micro-Roentgens/h (~13 cpm). 0.228 micro-Sieverts/h on Geiger counter. Location: Roppongi Hills, Minato-ku. Weather: clear, winds from the west. Safe.

‎2011-04-12 8:55: 15 micro-Roentgens/h (~15 cpm). 0.186 micro-Sieverts/h. At Roppongi Hills, Minato-ku. Weather: clear, winds from the north. Safe.

‎2011-04-11 11:18: 9 micro-Roentgens/h (~9 cpm). 0.124 micro-Sieverts/h. Location: Roof of Metropolis office, Minato-ku, Tokyo. Weather: Overcast, winds from the west. Safe.

2011-04-10 10:04: 21 micro-Roentgens/h (~21 cpm). 0.270 micro-Sieverts/h. Location: Kita-ku, Tokyo. Weather: partly cloudy, winds from the north east. Safe.

‎2010-04-09 7:06: 22 micro-Roentgens/h (~22 cpm). 0.28 micro-Sieverts/h. Location: Kita-ku, Tokyo. Weather: overcast and just starting to rain, winds from the south. Safe.

2011-04-07 9:42: 16 micro-Roentgens/h (~16 cpm). 0.166 micro-Sieverts/h. At Roppongi Hills, Minato-ku. Weather: overcast, winds from the south. Safe.

2011-04-06 10:11: 17 micro-Roentgens/h (~17 cpm). 0.207 micro-Sieverts/h. At Roppongi Hills, Minato-ku. Weather: clear, winds from the south east. Safe.

‎2011-04-05 16:46: 17 micro-Roentgens/h (~17 cpm). 0.218 micro-Sieverts/h. At Roppongi Hills near the Mori Tower. Weather: clear, winds from the south. Safe.

2011-04-04 9:17: 17 micro-Roentgens/h (~17 cpm). 0.176 micro-Sieverts/h. At Roppongi Hills near the Mori Tower. Weather: clear, winds from the north. Normal levels for this area.

‎2011-04-02 11:39: 26 micro-Roentgens/h (~26 cpm). 0.332 micro-Sieverts/h. Location: Kita-ku, Tokyo. Weather: Overcast, still. Safe.

‎‎2011-04-01 13:41: 11 micro-Roentgens/h (~11 cpm). 0.135 micro-Sieverts/h. Location: Roof of Metropolis office, Minato-ku, Tokyo. Weather: sunny, winds from the south. Safe.

‎2011-03-31 11:31: 11 micro-Roentgens/h (~11 cpm). 0.166 micro-Sieverts/h. Location: Roof of Metropolis office, Minato-ku, Tokyo. Weather: overcast, winds from the north. Safe.

‎2010-03-30 8:49: 30 micro-Roentgens/h (~30 cpm). 0.29 micro-Sieverts/h. Location: Kita-ku, Tokyo. Weather: Clear, winds from the north north east. Safe.

2011-03-29 9:22: 23 micro-Roentgens/h (~23 cpm). 0.238 micro-Sieverts/h. Location: Roppongi Hills, Minato-ku, Tokyo. Weather: clear, still. Safe.

‎2011-03-28 9:07: 23 micro-Roentgens/h (~23 cpm). 0.228 micro-Sieverts/h. Location: Roppongi Hills, Minato-ku, Tokyo. Weather: clear, winds from south. Around 1.5 times normal. Safe.

2010-03-27 16:14: 32 micro-Roentgens/h (~34 cpm). 0.363 micro-Sieverts/h. Location: Kita-ku, Tokyo. Weather: Clear, winds from the north west. Still about 2x normal for this area but down since last time. Safe.

‎2010-03-26 12:34: 34 micro-Roentgens/h (~34 cpm). 0.301 micro-Sieverts/h. Location: Kita-ku, Tokyo. Weather: Fine, strong northerly winds. 2x normal levels but steadily going down at all locations I’ve tested this week since Tuesday. Safe.

2011-03-25 10:53: 14 micro-Roentgens/h (~14 cpm). 0.145 micro-Sieverts/h. Location: Roof of Metropolis office, Minato-ku, Tokyo. Under 2x normal for this location. Safe.

2011-03-24 9:26: 34 micro-Roentgen (~34 cpm). 0.311 micro-Sieverts. Same as yesterday. Location: Roppongi Hills, Minato-ku, Tokyo. Weather: Overcast, winds from the south. Levels about 2 to 3x normal. Safe.

2011-03-23 9:45: 35 micro-Roentgens (~35 cpm). 0.311 micro-Sieverts. Location: Roppongi Hills, Minato-ku, Tokyo. Background radiation level a little elevated, but considered Safe.

2011-03-23 8:32: 38 micro-Roentgens (~38 cpm). 0.342 micro-Sieverts. Location: Kita-ku, Tokyo. Weather: cloudy, overnight northly winds. Levels a bit higher than yesterday. This is still well within safe range.

2011-03-22 13:35: 16 micro-Roentgens/h (~16 cpm). 0.176 micro_sieverts. Location: Roof of Metropolis office, Minato-ku, Tokyo. Weather: light rain, northly wind. Normal.

2011-03-22 10:04: 27 micro-roentgens/h (~27 cpm). 0.270 micro-Sieverts/h. Location: Tennozu Isle, Tokyo. Weather: light rain, northly wind. Normal.

2011-03-21 15:33: 30 micro-roentgens/h (~30 cpm). 0.301 micro-sieverts/h. Location: Kita-ku, Tokyo. Weather: light rain, north easterly wind. Normal.

2011-03-21 9:31: 38 micro-roentgens/h (~38 cpm). 0353 micro-sieverts/h. Location: Utsunomiya near rice fields (in Nishikawada). Weather: rain, light winds from north. Normal.

2011-03-20 9:18: 34 micro-roentgens/h (~34 cpm). 0.353 micro-sieverts/h. Location: Utsunomiya near rice fields (in Nishikawada). Lower levels than I was measuring yesterday. Winds: Light breeze from the East (Fukushima direction). Probably normal for this area and not concerning.

2011-03-19 9:00: 13 micro-roentgens/h (~13cpm ). 0.176 micro-sieverts/h. Reading taken at Kita-ku. : Normal

2011-03-18 10:13: 14 micro-roentgens/h (~14 cpm). 0.155 micro-sieverts/h. At Roppongi Hills near the Mori Tower. This morning’s levels: Normal

2011-03-17 11:34: 9 micro-roentgens/h (~9 cpm). 0.14 micro sieverts/h. Normal

2011-03-16 15:25: 10 micro roentgens (normal). 0.1 micro sieverts/h. Normal

2011-03-16 08:30: 17 micro roentgens/h. Twice normal but fine

2011-03-15 22:35: 21 micro roentgens/h (2x normal). Twice normal but fine

2011-03-15 10:00: 218 micro roentgens/h (22x normal). Elevated but not harmful.

2011-03-15 08:30: 9 micro roentgens/h (9-10 micro R = normal baseline). Normal

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