tedster - 5:52 pm on Sep 17, 2011 (gmt 0)
I don't think there is a way to find out how many impressions my site gets in the Organic listings
Webmaster Tools is one way (and the only way I know of) to get organic impressions rather than just clicks.
I was delighted when Google added that data, because I know from several patents that they monitor impressions for sudden spikes, and that can trigger a manual inspection and apparently slow improvement in rankings, as well as a possible penalty in some cases.
With regards to organic traffic, if it depends on query terms that are deemed location-sensitive, I don't think there's much a webmaster can do to fight the trend. Diversification of keywords and traffic sources is the best response, IMO.