For the record, here’s the list
of confirmed Panda Updates, with some of the major changes called out with
their AKA (also known as) names:
1.
Panda Update 1,
AKA Panda 1.0, Feb. 24, 2011 (11.8% of queries;
announced; English in US only)
2.
Panda Update 2,
AKA Panda 2.0,
April 11, 2011 (2% of queries; announced; rolled out in English internationally)
3.
Panda Update 3,
May 10, 2011 (no change given; confirmed, not announced)
4.
Panda Update 4,
June 16, 2011 (no change given; confirmed, not announced)
5.
Panda Update 5,
July 23, 2011 (no change given; confirmed, not announced)
6.
Panda Update 6,
Aug. 12, 2011 (6-9% of queries in many non-English languages; announced)
7.
Panda Update 7,
Sept. 28, 2011 (no change given; confirmed, not announced)
8.
Panda Update 8 AKA Panda 3.0, Oct. 19, 2011 (about 2% of queries;
belatedly confirmed)
9.
Panda Update 9,
Nov. 18, 2011: (less than 1% of queries; announced)
10. Panda Update 10,
Jan. 18, 2012 (no change given; confirmed, not announced)
12. Panda Update 12,
March 23, 2012 (about 1.6% of queries impacted; announced)
14. Panda Update 14,
April 27, 2012: (no change given; confirmed; first update within days of
another)
18. Panda Update 18,
Aug. 20, 2012: (about 1% of queries; belatedly announced)
19. Panda Update 19,
Sept. 18, 2012: (less than 0.7% of queries; announced)
20. Panda Update 20 , Sept. 27, 2012 (2.4%
English queries, impacted, belatedly announced
21. Panda Update 21,
Nov. 5, 2012 (1.1% of English-language queries in US; 0.4% worldwide;
confirmed, not announced)
22. Panda Update 22,
Nov. 21, 2012 (0.8% of English queries were affected; confirmed, not announced)
23. Panda Update 23,
Dec. 21, 2012 (1.3% of English queries were affected; confirmed, announced)
24. Panda Update 24,
Jan. 22, 2013 (1.2% of English queries were affected; confirmed, announced)
25. Panda Update 25,
March 15, 2013 (confirmed as coming; not confirmed as having happened)
27. Panda Update 27 AKA Panda 4.0, May 20, 2014 (7.5% of
English queries were affected; confirmed, announced)
28. Panda Update 28 AKA Panda 4.1, Sept. 25, 2014 (3-5%
of queries were affected; confirmed, announced)
29. Panda Update 30 AKA Panda 4.2, July 18, 2015 (2-3%
of queries were affected; confirmed, announced)
