Radiation counter map of the Fukushima Daiichi accident. June 18, 2011
The red/orange/yellow is about the same sized area as Baltimore, MD, Washington, DC, Arlington, WV, and Richmond, VA. See below comparison of East Coast USA to Japan in land area. Fukushima, above, is just about aligned with where DC is below:
Note: You can read updates on the IAEA’s website, here.