Google has confirmed the rumors of a Panda refresh happening over this weekend.

Google said this refresh started rolling out on Friday, June 8th and has an impact of less than 1% of search queries in the U.S. and about 1% worldwide.

As I said, the search forums took notice to major changes in the search results, specifically impacting sites that were originally hit by the Panda update. I reached out to Google this morning for a confirmation and they have confirmed the update.

Previously, Google panda update:

    Panda 3.6 on April 27th
    Panda 3.5 on April 19th
    Panda 3.4 on March 23rd
    Panda 3.3 on about February 26th
    Panda 3.2 on about January 15th
    Panda 3.1 on November 18th
    Panda 2.5.3 on October 19/20th
    Panda 2.5.2 on October 13th
    Panda 2.5.1 on October 9th
    Panda 2.5 on September 28th
    Panda 2.4 in August
    Panda 2.3 on around July 22nd.
    Panda 2.2 on June 18th or so.
    Panda 2.1 on May 9th or so.
    Panda 2.0 on April 11th or so.
    Panda 1.0 on February 24th