Guys i need some help with your view on this scenario which affected two of my site on Dec 10 and they had a significant impact :
1. Site 1: Gained some obvious negative backlinks from hacked sites by 5 Dec and lost by Dec 9 and also lost some minor good backlinks , but if you see overall data , i lost significant backlinks both good and bad on 9th Dec.
2. Site 2: Had one or two negative backlinks lost by Dec 03 .
Now Site 1 took a massive fall on Dec 10th and i can observe some specific types of pages are removed from the index for which i was ranking so well , not to mention the negative backlinks were linking those kinds of pages .
Site 2 also took some hit on the same day but not as much as Site 1 and the same kind of pages were removed as both the sites contained similar url structure but different content on them.
Guys , please help me assess a possible correlation between these events so i can do the necessary , i know something happened on Dec10 in a small scale but i am unsure is it the link factor or something related to my pages on the site.
Not to mention that we never had any issues with panda related thing .
Sorry for my bad english
Thank you.