Nearly 10 years after the Deepwater Horizon oil spill, a study suggests the spill was much worse than estimated.
The study, published Wednesday, says satellites were not able to fully detect oil in large areas of the Gulf of Mexico.
Officials told CNN the spill was about 30% larger than estimated.
The discrepancy is due to smaller concentrations of oil that are often invisible to satellite imagery.
The 2010 oil spill is considered one of the worst environmental disasters in US history.
11 workers on board were killed and the explosion released approximately 168 million gallons of oil.