We are living in some interesting times!

I believe it take 3-4 days for the radiation in the Jetstream to reach the US and I believe that is what these charts above show. Here are links to the active charts for both of those sites, NETC chart members only:
Station ID: 6:07546-HG4020 Futaba, Fukushima, JP
http://netc.com/chart/view.php?n=6%3A07546-HG4020Station ID: 5:941 Olympia, WA, US
http://netc.com/chart/view.php?n=5%3A941