Live Geiger Counter - Tokyo

http://www.ustream.tv/channel/geiger-counter-tokyo

Tokyo shows 13 CPM or 0.01 mR/hr (millirems)

http://www.blackcatsystems.com/GM/converting_CPM_mRhr.html

Converting From CPM to mR/hr
- 1200 CPM for 1 mR/hr

http://www.blackcatsystems.com/GM/units.html

Background Radiation Levels
Source millirems

Natural
Radon 200
Other than Radon: 100
Cosmic 27
Terrestrial 28
Internal 39
Total 300

Nuclear Fuel Cycle 0.05
Consumer Products* 10

Medical
Diagnostic X-rays 39
Nuclear Medicine 14
Total 53

Total about 360 mrems/year

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