Google Panda Update 21 (SEJ)

Google’s confirmed to us that a Panda Update happened.

Google said that worldwide, the update will impact about 0.4% of queries that a regular user might notice. For those searching in the United States in English, the percentage is higher. 1.1%, Google says.

This marks the 21st confirmed Panda Update by Google and stays in keeping with the roughly 4-6 week release schedule. Here are all the releases so far:

1. Panda Update 1, Feb. 24, 2011 (11.8% of queries; announced; English in US only)
2. Panda Update 2, 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, 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)
11. Panda Update 11, Feb. 27, 2012 (no change given; announced)
12. Panda Update 12, March 23, 2012 (about 1.6% of queries impacted; announced)
13. Panda Update 13, April 19, 2012 (no change given; belatedly revealed)
14. Panda Update 14, April 27, 2012: (no change given; confirmed; first update within days of another)
15. Panda Update 15, June 9, 2012: (1% of queries; belatedly announced)
16. Panda Update 16, June 25, 2012: (about 1% of queries; announced)
17. Panda Update 17, July 24, 2012:(about 1% of queries; announced)
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 , Sep. 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)

The notations tell what percentage of Google’s queries were estimated impacted by the Panda release, when this is given.

The notations also tell whether Google announced that an update happened publicly or if it was confirmed after the fact, as is the case with the latest one.