A critique of Reuter's reactor graphic

A recent article in Reuters following the Japan earthquake and subsequent fears over Japan’s nuclear reactors described the similar fear that reactors in the U.S. may also be vulnerable in the event of a major earthquake. This graphic shows the extent to which the area surrounding New York’s Indian Point nuclear reactor would be affected by a similar natural disaster. But, to be honest, there are a few obscure elements on the graphic that don’t convey any real meaning to me, at least at first glance. For example, the peach-colored circle around the Greater New York City area—why is that denoted the way it is? Also, the chatter says “Affected areas within potential evacuation radii,” which, besides being jargon-y, does not clearly tell me the degree to which these areas would be affected. The subtle color change between the concentric circles (dark blue, light blue, etc.) show there is some degree of difference, but I think a key would have been a much better informational tool.

http://graphics.thomsonreuters.com/11/03/US_NYCNUKE0311_SC.gif