The latest glimpse of video footage of the oil spill deep under the Gulf of Mexico indicates that around 95,000 barrels, or 4 million gallons, a day of crude oil may be spewing from the leaking wellhead, 19 times the previous estimate, an engineering professor told Congress Wednesday.

The figure of 5,000 barrels, or 210,000 gallons, a day that BP and the federal government have been using for weeks is based on observations of the surface slick made by satellites and aircraft. Even NASA’s satellite-based instruments, however, can’t see deep into the waters of the gulf, where much of the oil from the gusher seems to be floating. The well is 5,000 feet below the surface…

On Wednesday, Wereley told a House of Representatives Energy and Commerce subcommittee that his calculations of two leaks that are on videos BP released on Tuesday showed 70,000 barrels from one leak and 25,000 from the other.

He said the margin of error was about 20 percent, making the spill between 76,000 and 104,000 barrels a day. However, Wereley said he’d need to see videos that showed the flow over a longer period to get a better calculation of the mix of oil and gas from the wellhead.