I am worried about the backlinks created for my website. Two of my websites have an alarming dip in their graphs as shown on ahrefs website. And my rankings have also been affected badly. One of my websites managed to keep a steady graph of active backlinks up till 19 Apr 2013 while my second website was on a steady scale only till 12 Apr 2013. After that the journey continued downhill to a level which shows that I am now 5000 backlinks down from the last steady point.
Now I'm wondering, is there some kind of Google update that I am not aware about? What can be the reason for it? Has any one of you experienced the same?