Google Algorithm Updates in the year of 2013.

Panda Update #24  22^nd   January 2013

Google affirmed its first official update of 2013, asserting 1.2% of inquiries influenced. This did not appear identified with talk of a update around 1/17-18 (which Google did not confirm).

Panda Update #25  14^th  March 2013

Matt Cutts pre - announced a Panda upgrade at Smx West, and proposed it might be the last Update before Panda was incorporated into the center algorithm. The precise date was unsubstantiated.

Phantom  May 9^th  2013

In the period around May 9^th 2013, there were numerous reports of a algorithm update. The accurate nature of this Update was obscure, however numerous resources reported huge activity misfortune.

Domain Crowding May 21^st  2013

Google announced a update to control realm crowding/diversity profound in the SERPs (pages 2+). The timing was misty, however it appeared to take off only preceding Penguin 2.0 in the US and conceivably that day internationally.

Penguin 2.0 (#4)  May 22^nd  2013

After months of theory bordering on buildup, the 4th Penguin Update (named "2.0" by Google) touched base with just direct sway. The definite nature of the progressions were misty, however some confirmation inferred that Penguin 2.0 was all the more finely focused to the page level.

Multi week update June 27^th 2013

Google's Matt Cutts tweeted an answer inferring a "multi-week" Algorithm Update between harshly 12^th June  and "the week after 4^th". The way of the upgrade was misty, however there was huge rankings instability throughout that time period, topping on June 27^th. It creates the impression that Google might have been trying a few changes that were later moved back.

Panda Recovery Update July 18^th  2013 

Google confirmed a Panda update, but it was unclear whether this was one of the 10-day rolling updates or something new. The implication was that this was algorithmic and may have "softened" some previous Panda penalties.

In-depth Articles Update  August 6^th  2013 

Google added a new type of news result called "in-depth articles"  dedicated to more evergreen, long-form content. At launch  it included links to three articles, and appeared across about 3% of the searches. 

Hummingbird Update  August 20^th  2013

Google suggested that the "Hummingbird" update rolled out about a month earlier on Semptember 26^th. Hummingbird has been compared to Caffeine, and seems to be a core algorithm update that may power changes to semantic search and the Knowledge Graph for months to come.

Penguin 2.1 October 4^th  2013

Google launched another Penguin update after 135 days of the Hummingbird update. It was given the 2.1 designation, this was probably a data update (primarily) and not a major change to the Penguin algorithm. The overall impact seemed to be moderate, although some webmasters reported being hit hard.

Page Rank Update December 6^th 2013

On Decemer 6^th 2013 Google Shocks Webmasters By Updating Toolbar PageRank Before Year End. Last time this update was made on February 4^th 2013 Usualy Google updates Page Rank after 3 months but this time it took about 10 months.