In a Google Hangout, Google’s John Mueller said that the next Penguin update might not be announced:
“We are generally moving to a little bit of a faster [Google Penguin] update cycle there. But I can’t say that it will be monthly, there might be some changes there, subtle differences with the timing.”
Google’s Penguin update targets websites with many low quality links. You can find low quality links that point to your site with the link disinfection tool in SEOprofiler.
