The Ministry of Education and Science released the data on radioactive fallout by prefecture in January 2012, on March 23.
For Fukushima Prefecture, it is measured in Futaba-machi, where Fukushima I Nuclear Power Plant is located. The measurement for the month of January, 2012 was:
Cs-134: 8,020 Mbq (megabecquerels)/km2
Cs-137: 11,100 MBq/km2
Total cesium: 19,120 MBq/km2
The measurement in Fukushima in Futaba-machi started in September 2011. From September to November, the numbers were in 4 digits. The fallout amount jumped in December, as you see in the table below (created from the data at MEXT website):
There was a similar jump, albeit much smaller, in the fallout measured in Fukushima City starting December 2011. The increase in Fukushima City has been attributed to winds blowing the dusts. (FYI, here's the latest fallout data for Fukushima City.)
West of Shizuoka, it's all ND. Miyagi is supposed to have started measuring the fallout in March this year.
From MEXT announcement on March 23, 2012, "Reading of environmental radioactivity level by prefecture (Fallout)(January, 2012)"
| Prefecture City | Fallout# | |||||
|---|---|---|---|---|---|---|
| I-131 | Cs-134 | Cs-137 | Other detected nuclides | |||
| 1 | Hokkaido Sapporo | ND | ND | ND | | |
| 2 | Aomori Aomori | ND | ND | ND | | |
| 3 | Iwate Morioka | ND | 1.6 | 2.0 | | |
| 4 | Miyagi | - | - | - | ||
| 5 | Akita Akita | ND | 0.069 | 0.086 | | |
| 6 | Yamagata Yamagata | ND | 3.0 | 3.9 | | |
| 7 | Fukushima Futaba | ND | 8020 | 11100 | | |
| 8 | Ibaraki Hitachinaka | ND | 15 | 18 | | |
| 9 | Tochigi Utsunomiya | ND | 16 | 20 | | |
| 10 | Gunma Maebashi | ND | 3.3 | 4.1 | | |
| 11 | Saitama Saitama | ND | 7.6 | 9.8 | | |
| 12 | Chiba Ichihara | ND | 7.1 | 11 | | |
| 13 | Tokyo Shinjuku | ND | 8.9 | 11 | | |
| 14 | Kanagawa Chigasaki | ND | 2.6 | 3.2 | | |
| 15 | Niigata Niigata | ND | 0.084 | 0.087 | | |
| 16 | Toyama Imizu | ND | ND | ND | | |
| 17 | Ishikawa Kanazawa | ND | 0.068 | 0.090 | | |
| 18 | Fukui Fukui | ND | ND | ND | | |
| 19 | Yamanashi Kofu | ND | 0.41 | 0.54 | | |
| 20 | Nagano Nagano | ND | 1.3 | 1.6 | | |
| 21 | Gifu Kakamigahara | ND | ND | ND | | |
| 22 | Shizuoka Shizuoka | ND | 0.34 | 0.51 | | |
| 23 | Aichi Nagoya | ND | ND | ND | | |
| 24 | Mie Yokkaichi | ND | ND | ND | | |
| 25 | Shiga Otsu | ND | ND | ND | | |
| 26 | Kyoto Kyoto | ND | ND | ND | | |
| 27 | Osaka Osaka | ND | ND | ND | | |
| 28 | Hyogo Kobe | ND | ND | ND | | |
| 29 | Nara Nara | ND | ND | ND | | |
| 30 | Wakayama Wakayama | ND | ND | ND | | |
| 31 | Tottori Touhaku | ND | ND | ND | | |
| 32 | Shimane Matsue | ND | ND | ND | | |
| 33 | Okayama Okayama | ND | ND | ND | | |
| 34 | Hiroshima Hiroshima | ND | ND | ND | | |
| 35 | Yamaguchi Yamaguchi | ND | ND | ND | | |
| 36 | Tokushima Myozai | ND | ND | ND | | |
| 37 | Kagawa Takamatsu | ND | ND | ND | | |
| 38 | Ehime Matsuyama | ND | ND | ND | | |
| 39 | Kochi Kochi | ND | ND | ND | | |
| 40 | Fukuoka Dazaifu | ND | ND | ND | | |
| 41 | Saga Saga | ND | ND | ND | | |
| 42 | Nagasaki Omura | ND | ND | ND | | |
| 43 | Kumamoto Uto | ND | ND | ND | | |
| 44 | Oita Oita | ND | ND | ND | | |
| 45 | Miyazaki Miyazaki | ND | ND | ND | | |
| 46 | Kagoshima Kagoshima | ND | ND | ND | | |
| 47 | Okinawa Uruma | ND | ND | ND | | |
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11 comments:
Does this mean people have to evacuate Tokyo?
I didn't see any special buses.
Wow, I wonder what are the other detected nuclides? Mega refers to "million" so we are looking at about 20 million becs per sq km in Tokyo so that's about 2 becs per sq meter per month of accumulation. If this goes on for awhile (400 - 800 years) pretty soon the soil throughout the region will exceed government limits of 5000 becs per kg for agriculture. Time to get on the bus.
Fukushima : APPEAL OF HASHIZUME BUN, A-BOMB SURVIVOR OF HIROSHIMA
http://ameblo.jp/hibakushaglobal/entry-10902685850.html
accuracy : Hashizume Bun, the 80-year-old author of "The Day the Sun Fell: I was 14 years old in Hiroshima",was less than 1.5 kilometers from the hypocenter of the explosion.
http://www.allvoices.com/contributed-news/8582161-japans-nuclear-crisis-haunts-hiroshima-survivors
How is Japan to survive with ambulances running 24/7 (I do not like this phrase)? I cannot go a single day in Chiba nor Tokyo without hearing the sirens all the time. Not one single day. I wish someone had stats on this. People, watch what you eat!
To make better sense of radiation data, especially that which comes out months after the data is collected, we need to keep a better track on weather conditions. Not just the wind direction, but whether it has snowed or rained in a particular place on a particular date.
For example it seems that Tokyo would have received much worse contamination early in the crisis if it had been raining there when the plume arrived, but this was one piece of luck that helped at a time when there was no shortage of bad luck and incompetence.
According to the latest from rt.com:
"Radiation blowback: 10 times lethal level registered at Fukushima".
Has anyone background to this report?
@anon at 1:15PM, I suggest you read the article not just headline before posting a comment. It's about inside the Containment Vessel of Reactor 2.
@ elbows
Raining down actually is bad...
My cousin was riding home on her bike in Spring 1986 when the highest-radioactive rain from Chernobyl poured over her. (The area where our family lived is the second-most radioactive area in Germany after the Bavarian Forest)
Her child, born 5 years later, got cancer with 16.
I think the weather's main influence is in the time the major releases happen. Just remembering the weather planning for nuclear testing at the NTS. If the wind directed towards California, no testing was conducted. If the weather headed toward Mormon-inhabitated Utah, testing was given green light.
Actually the Utah mormons are in special interest of long-term radiation effect studies, as in this group some common carcinogens like alcohol, nicotine etc aren't much of a co-factor.
But, in long term it's the main climate. Dust is carried over long distances in the dry seasons.
At this point of view it could potentially have actually made some sense having the peasants plow down the upper layer of soil.
But why wasn't then the zone and the highest-contaminated northwestern corridor plowed, where agriculture got forbidden?
@anon 1:50pm
It is Mega(=million) Bq per square kilometer, which is equal to Bq per square meter as one square kilometer is one million square meters.
e.g. Shinjuku: Cs-134: ND Cs-137: 8.9 Bq/sqm Other: 11 Bq/sqm
Y: 1 MBq/km^2 = 1 10^6 Bq/(1000 m)^2 = 10^6 Bq/(10^3)^2 m^2 = 1 Bq/m^2
It is not that bad, translates into 19kBq/sqm.
It is similar to what Southern Bavaria in Germany received following the Chernobyl accident. People are still living there and don't have any health effects. The only restriction is that you don't collect wild mushrooms there anymore, and cannot hunt for wild boars - their meat is too contaminated.
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