The fourth "Paranormal Activity" fright flick crept into the No. 1 spot at the weekend box office with 30.2 million dollars in U.S. and Canadian ticket sales.
Iran hostage thriller "Argo" earned 16.6 million dollars, and took second place.
Two-time box office leader "Taken 2" fell to the No. 4 spot with 13.4 million dollars from Friday through Sunday.
Low-budget "Paranormal Activity 4" opened short of distributor Paramount's projection for at least 35 million dollars in domestic receipts during the movie's leadoff weekend.