The radioactivity which originated from the Bikini and Eniwetok tests in the spring of 1954 was transported mainly to the west, then to the north toward the coast of J a.pan, and finally down south a.long the Kuroshio Current by summer 1955….
Miyake, Yasuo, and Katsuko Saruhashi. 1958. "Distribution of man-made radioactivity in the North PacIific through summer 1955." Journal of Marine Research 17, (1). https://elischolar.library.yale.edu/journal_of_marine_research/928