1. Current Events -- week of March 11- 19
Supermoon March 18

2. Earthquakes and Tsunamis
Recent major earthquakes
-- Haiti, Chile, New Zealand,
-- Japan
Haiti – Jan
Chile -- Feb 27,
New Zealand – Sep 3, 2010 – 7.2
Japan - Mar 11– 8.9

4. Nuclear Power and Radiation
Fission
Fusion

5. What is this “radiation” ?
Is it electromagnetic ?
Some gamma rays released but most is radioactive particles -- neutrons and daughter products – nuclei

6. Everyday sources of radiation
Unit of measurement – Sievert
m = milli = 0.001
m = micro =
Everyday sources of radiation
Natural /year
Cosmic (avg) mSv
Earth crust mSv
Radon mSv
Food & drink mSv
Total mSv
Artificial
chest CT scan mSv
mammogram mSv
NYC LA flight m Sv
Flight crews mSv/yr
50 km of nuclear plant mSv/yr
50 km coal plant mSv/yr
Increased cancer risk mSv/yr
Fukishima workers mSv/yr

7. Increased cancer risk >100mSv/yr Fukishima workers 250mSv
Dose limit radiation poisoning mSv short term
Severe radiation poisoning mSv = 2Sv short term
Fatal Sv
3 Mile Island -- avg total dose was 80mSv within 10 mi !
California -- 3/19 < 1mSv from Fukushima fallout
Has the US Media exaggerated the risk? --- YES
SEE for a good illustration
For comparative radiation levels around the world see also ----

8. From http://www. weathertrends360
And if you smoke see