DodgeThis - 1:42 pm on Jan 8, 2013 (gmt 0) [edited by: goodroi at 3:00 pm (utc) on Jan 8, 2013]
Our site is split across several regional geo-targeted sub domains. All are built using same in-house CMS, same niche, different regional content. As of 11 Dec two of the subs suffered a >90% drop in Google impressions.
The one thing that historically made these two subs different is that they had a lot of thin content before Panda demoted them. Since then all the thin pages were removed and the offending subs brought strictly in line with the others. After several months the two subs staged a full recovery (that was Oct 2011, after which they continued to improve until 11 Dec when the traffic dived to early 2011 Panda levels).
One thought is that we are again being penalized for the historic thin content. Google is still finding the 410s, so perhaps the volume of those yet to be discovered have triggered something with the latest Panda.
Does that sound feasible?
Beyond that we’re out of ideas and would certainly welcome some. Guess we could start disavowing backlinks, but we’re resisting for the time being.
[edited by: goodroi at 3:00 pm (utc) on Jan 8, 2013]