Image may be NSFW.
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Click on the chart above to see it in full size. The smallest scale is the one at the bottom (labeled (1)). Each scale above that one represents 10x the range of the scale below it.
When you hear news reports about “detectable radiation that is above normally accepted limits” around the heavily damaged Fukushima Daiichi nuclear power complex in Japan, note that the “limits” all pretty much occur on scales 1 and 2. You have to get up to scale 4 (1000x the levels on scale 1) before you start seeing health problems.
This has been a public service messages. ..bruce w..
