Every month about this time comScore releases the search engine rankings data, and I report it here. These are not the actual search engine rankings that you see when you search at a search engine, which are constantly changing. Think of this more as the “market share” for the search engine industry.

comScore, Inc. (NASDAQ: SCOR), a leader in measuring the digital world, today released its monthly comScore qSearch analysis of the U.S. search marketplace. Google Sites led the explicit core search market in February with 66.4 percent of search queries conducted.

Google Sites led the U.S. explicit core search market in February with 66.4 percent market share (up 0.2 percentage points), followed by Microsoft Sites with 15.3 percent (up 0.1 percentage points) and Yahoo! Sites with 13.8 percent. Ask Network accounted for 3.0 percent of explicit core searches, followed by AOL, Inc. with 1.5 percent.