I have a site with 300 sub category urls each pointing to one US city, targeting keywords like, say, new york city bookstores, hartford city bookstores etc, and until around mid August 70% of these urls were ranking in top 30 for their specific main target keyword, but then suddenly within a day almost all of them got dropped below 100 and some much lower. They still are not back and I simply dont know what went wrong or what I can do to fix it. Is there a way to somehow get them back in 2 weeks? I will appreciate any and all help. If you have any guess what's going on, please respond. Thanks a ton!