Japan Radiation Levels - More information, less hysteria.

There has been a lot of media attention focused on Japan lately. The large majority of reports have been short on details and long on emotional language. If you believe the worst of it then we're about to witness a mushroom cloud of epic proportions rise above Japan and drift over our heads spreading radioactive death from above.
The truth, at the moment, is a little less dramatic and requires more time to explain than a typical five minute news bite. The website http://www.cbryanjones.com/journal/2011/3/19/japan-radiation-levels-in-english.html has done an excellent job of mapping the relative radiation levels around Japan and explaining what the levels mean in terms of background exposure or medical procedure exposure.
Please take the time to read the complete page including the summary at the end, it is well worth your time.