Ah!
“This environmental radiation which ORDC measures is the airborne radiation in units of nGy/h (nanograys per hour). The airborne radiation level around ORDC is generally measured to be 30 - 40 nGy/h. “
Latest readings are in the 600 to 700 nGy/h range.
Wind is from the dirction of damged plants.
http://www.jaea.go.jp/04/o-arai/Oantai_e/html/tbl_msr1h0.html
Unless I’m looking at the graph incorrectly, it appears most recent readings are in the 250 - 400 range, down from a peak of 1100 at 0700 local time Wed.
http://www.jaea.go.jp/04/o-arai/Oantai_e/html/tbl_msr1h0.html
Here is a constant geiger reading for Tokyo. Very low count.
http://www.ustream.tv/channel/geiger-counter-tokyo
For reference, Denver generally reads in the upper 50’s cpm.