Monitoring firm comScore has released its monthly qSearch analysis of the search marketplace and, unsurprisingly, Google has retained its position as the top search engine in October with 58.5% of the search market, up from 57 percent in September.

October has been a good month for search engines in the US with a 12 percent increase in total searches versus September. Nonetheless, second-ranked Yahoo went down to 22.9 percent (down 0.8 points) in terms of market share and Microsoft followed the descending trend to 9.7 percent (down 0.6 points). Ask Network took fourth place with 4.7 percent of the U.S. search market, followed by Time Warner, which owns AOL, with 4.2 percent.

According to the report, each of the five core search engines achieved at least five percent growth in search query volume, but only Google managed to increase its market share over the period.