Penguin 3.0 rolled
google Penguin 3.0 rolled out September 4th
We started rolling out the next generation of the Penguin webspam algorithm this afternoon (Se 4, 2013), and the rollout is now complete. About 7% of English-US queries are affected to the degree that a regular user might notice. The change has also finished rolling out for other languages world-wide. The scope of Penguin varies by language, e.g. languages with more webspam will see more impact.
But it is not announced by Google .
Where we can observe the decline of visitors from the Google search engine and also we can watch it through the site http://mozcast.com/ ،