Background Radiation at the Observatory
July - Dec 2011

Date
cpm
7/01/2011
38.3
7/08/2011
35.0
7/17/2011
35.7
7/23/2011
40.2
8/01/2011
34.3
8/05/2011
40.4
8/06/2011
36.4
8/29/2011
38.0

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With the radiation concerns from Japan now low, we are transitioning to a weekly report

Readings are 10 minute averages of counts/minute (cpm), counts in the 30's are normal
120 cpm = 1uSv/Hr for Cs-137, 20,000 uSv/Hr is max safe yearly limit

See Radiation Dose Chart or See EPA Radiation Monitoring

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