Dr. Ken Buesseler, Woods Hole Oceanographic Institution, published by eon3 on Oct 3, 2015 (at 20:00 in): “We are starting to see the penetration of cesium from offshore… to these coastal sites… I also want to point out that we are not the only ones doing this. This is from a Canadian lab (see map), they have some cruises offshore, this is back to 137Cs, but this number here is 5 (becquerels per cubic meter)… We see it primarily offshore, a little bit of mixing here near shore.”
Dr. John Smith, Fisheries and Oceans Canada (pdf), Oct 2015 (emphasis added): Transport of the Fukushima radioactivity plume to the Eastern North Pacific Ocean — The large discharge of radioactivity into the northwest Pacific Ocean from the 2011 Fukushima Dai-ichi nuclear reactor accident has generated considerable concern about the spread of this material across the ocean to North America… By June, 2013, the Fukushima signal had spread onto the Canadian continental shelf and by February, 2014 had increased to a value of 2 Bq/m3 throughout the upper 150 m of the water column resulting in an overall doubling of the fallout background from atmospheric nuclear weapons tests. Between February, 2014 and February, 2015 the Fukushima 137Cs signal doubled again to levels in excess of 4 Bq/m3 in the upper 200 m. Adjusted circulation model estimates that match our measured values indicate that future levels of Fukushima 137Cs off the North American coast will likely attain maximum values of at least 5 Bq/m3 by 2015-2016… The increase in 137Cs levels in the eastern North Pacific from Fukushima inputs… does not represent a significant threat to human health or the environment.
Published: October 13th, 2015 at 8:17 pm ET