A 5.8 earthquake rocked Japan just south of the Fukushima area shortly after midnight on September 20 (Japan time). Apparently radiation measurements in this area have temporarily spiked.
I would like to introduce that we have observed a high radiation dose in the radioactivity measurement data of Fukushima prefecture around. Location was observed particularly high number is Koriyama, Fukushima Prefecture and Iwaki City, Fukushima Prefecture. You can think of it either because it is too high too, like a lump of radioactivity or are coming, instrument of what has failed the number of Iwaki. Near the Koriyama has also observed a high number, here was observed a number close to 10 times the peacetime temporarily… Cause radiation dose has been soaring in many parts of Fukushima, it is likely that it is off the coast of Fukushima intensity 5 upper that occurred the other day. It has also strengthened the monitoring of such Fukuichi live camera just to be sure, but such a big accident can not be confirmed at this time. (link)
This new plume would arrive on the west coast around Tuesday, Sept. 24. Previous earthquakes have also generated plumes. I remember that the one that arrived after the Jan. 1, 2012 quake was really nasty.
In a previous discussion Iodine-131 from latest criticality it was noted that the iodine spike in Chiba prefecture sludge was deposited in the period August 7 through August 20. According to CRIIRAD, Montélimar, France had spikes in alpha and beta atmospheric radiation on September 4-7. Rhône river water in Avignon showed a spike in iodine-131 on Sept. 7. The iodine cloud must have widened and dispersed quite a bit in its journey across the northern hemisphere… and 75% or more of it would have decayed by the time it reached France. So it must have been quite a substantial radioactive cloud.
Fukushima not only affects Japan, but the Pacific ocean, North America, and Europe too. Australia has had average radiation levels increase substantially, also.
UPDATE: On September 27th 2013, CRIIRAD laboratory sent to me a message explaining that the increase of alpha-bêta radiation in Montelimar on September 4Th 2013 and the increase of gamma radiation rates in the water in Avignon on September 7th 2013 were linked to variations of natural activity and had nothing to do with Fukushima.
COMMENT: Yes, this was explained on the CRIIRAD graph. How do they know that it is not from Fukushima? I have not seen scientific evidence presented that it did not originate there. Why would iodine-131, which is a man-made isotope, be presented as if it was detected, as a result of natural processes? If this is not a measurement of iodine-131, but a measurement of gamma rays in a range that includes lead-214 and bismuth-214, then these graphs are not useful for reporting levels of iodine-131, and it is questionable why they are published. Also, lead-214 is part of the decay chain of uranium-238. If Fukushima is emitting U-238 into the atmosphere, this would also cause a spike in these energies.