Radiation in Kanagawa - At a Glance

Kanagawa Conditions Measured in Chigasaki (Updated monthly, starting 4/21/2011)
Source: MEXT
(Ministry of Education, Culture, Sports, Science & Technology, Japan)

link: here

Acronyms: I-131 = Iodine-131 / Cs-137 = Caesium-137 N/D: Non-Detectable

fallout in Kanagawa (MBq/km2) *
*megabecquerel per square kilometer

Date I-131....Cs-137

4/19: N/D.....N/D
4/11: 5.0.....N/D
4/5: N/D.....N/D
4/4: 11......7.8
4/3: N/D.....N/D
4/2: N/D.....N/D
4/1: 13.....5.9
3/31: 29.....52
3/30: 13.....12
3/29: 11.....5.7
3/28: 35.....20
3/27: 6.4.....N/D
3/26: 28.....14
3/25: 39.....7.7
3/24: 3,100.....42
3/23: 1,300.....64
3/22: 340.....110
3/21: 750.....210
3/20: 38.....N/D
3/19: 40.....N/D

Note: Currently in search of an average I-131/MBq/km2 -- If anyone has this, please drop a line.

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drinking water in Kanagawa (Bq/kg) *
*becquerels per kilogram

Date I-131....Cs-137

4/19: N/D.....N/D
4/11: N/D.....N/D
4/5: 1.9.....N/D
4/4: 2.3.....N/D
4/3: 2.7.....N/D
4/2: 3.3.....N/D
4/1: 4.5.....N/D
3/31: 6.3.....N/D
3/30: 8.6.....N/D
3/29: 9.9.....N/D
3/28: 9.6.....N/D
3/27: 9.2.....N/D
3/26: 7.4.....N/D
3/25: 4.9.....N/D
3/24: 1.0.....N/D
3/23: 0.75.....N/D
3/22: 0.93.....N/D
3/21: 0.58.....N/D
3/20: 0.46.....N/D
3/19: 0.43.....N/D
3/18: N/D.....N/D

Note: "Japan’s legal safety limit on radiation in water / milk: 300 becquerel per kilogram"
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radioactivity in Kanagawa （μSv/h）microsieverts per hour
(Chigasaki)

Date （μSv/h）

4/19: 0.055
4/11: 0.058
4/6: 0.061.5
4/5: 0.063
4/4: 0.064
4/3: 0.064
4/2: 0.066
4/1: 0.066
3/31: 0.069
3/30: 0.070
3/29: 0.071
3/28: 0.075
3/27: 0.077
3/26: 0.081
3/25: 0.086
3/24: 0.087
3/23: 0.098
3/22: 0.096
3/21: 0.111
3/20: 0.048
3/19: 0.049
3/18: 0.050

Note: "At sea-level, the average radiation level is approximately 0.03 microsieverts per hour."

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Condition of Reactors (links): updated daily, click here and here

WHO REPORTS: World Health Organization
(Western Pacific Region)
Daily "Situation Reports" in PDF form; link here

Disaster Prevention & Nuclear Network
for Nuclear Environment (English)
or SPEEDI offers a map graphic of radiation
levels by Prefecture (updated daily)
(note: I believe "nGy/h" is a measure of gamma radiation)
link here

Same information as SPEEDI but
translated into Microsievert units; link here

Another map+graph, pinpointing more exact readings; link here

What are sieverts, milisieverts? Simple explanation; link here

Blog: Educating ourselves: Becquerels and base figures what do they all mean?