Hello friends, One of my client has send this picture to figure out that his website hit by any any google algorithm update or not.( Penguin or Panda).. No manual action message recieved from Google web spam team. Thanks in Advance
There's no possible way that you'll be able to determine which kind of penalty this was based on that graph. You need to look at the site to determine if it's Panda. You need to look at the backlinks to determine if its Penguin. For your reference: http://searchenginewatch.com/article/2295002/Recovering-from-Penalties-Penguin-and-Panda
Also, there is a clear date when the results rocketed to their peak. Analyze all actions done on the specific date and see how that might have influenced the stats
Chances are there for a penalty. But doesn't looks like a big loss in rankings. The graph shows a steady passage even now considering the odd day of rocket high. If you are still doubtful check any actions like some new links listed on days before the hike in graph.
I also can't able to figure out that how it's actually happened... All things that I have done that day was my regular work.. and also doing that same thing to day also.. but never happened again.... God knows that what happened on that day..
I check my back links regularly with monitorbacklinks ...but not found any suspicious or spam backlinks from any websites...
Go a few days back then, many changes take a little time to be properly indexed and affect your stats