Something happened to Google search results on Feb 4th. Still no official announcements has been made from the end of Google but many are guessing it to be the Starbucks update. SERP flux measuring tool, Algoroo referred to this update as the Starbucks update. However, it might be a Panda or a Penguin update too.
Here is a screenshot of Algoroo indicating a high roo value of 2.99.
Similarly, here is a screenshot of Mozcast indicating 90% flux rate.
Did you guys experienced something in your site's search positions? Feel free to add in comments below.