The news that wreckage from the missing Malaysia Airlines jet may have been spotted in the southern Indian Ocean was enough to create a surge in news viewing late Wednesday night and, for the moment anyway, stave off potential flagging interest in the two-week-old story.

CNN continued to show enormous audience increases, though as of Wednesday it was no longer topping the perennial leader, Fox News, anywhere in prime time. Fox News had always won in terms of total viewers, but CNN had been doubling its usual audience among the group favored by news advertisers, viewers between the ages of 25 and 54, and topping Fox News in some isolated hours.

CNN still posted greatly increased numbers with that group Wednesday night, but Fox maintained a lead in every hour from 7 p.m. to 11 p.m. (It won the ratings for the total day, as well.) CNN’s 10 p.m. hour, which had been doing especially well with the format of asking aviation experts questions texted in by viewers, faded somewhat, dropping behind Sean Hannity’s show on Fox by the biggest margin of the night in the 25-to-54 group, 291,000 viewers to 410,000 viewers.

Perhaps the audience lost some interest when the CNN anchor Don Lemon asked one expert if it was really preposterous, after all, to ask if Flight 370, which vanished on March 8, may have been swallowed by a black hole. The plane, which carried a total of 239 passengers and crew members, took off from Kuala Lumpur in the early hours of March 8, bound for Beijing, and disappeared from ground controllers’ screens 40 minutes later.