Satellite analysis estimates routine oil slicks cover 1.6 million square kilometers of ocean each year
A SkyTruth report estimates that oil slicks from ships and offshore oil platforms cover nearly 1.6 million square kilometers of ocean surface annually. The U.S.-based nonprofit based its estimate on satellite imagery, machine learning and vessel-tracking data, with the affected area described as slightly larger than Mongolia.
Oil slicks linked to ships and offshore oil platforms cover nearly 1.6 million square kilometers of ocean surface each year, according to a recent report by SkyTruth. The estimated area is equivalent to about 618,000 square miles.
SkyTruth, a U.S.-based nonprofit, produced the estimate using satellite imagery, machine learning and vessel-tracking data. The report concerns routine oil pollution on the ocean surface rather than a single reported spill.
The estimated annual area is described as slightly larger than the nation of Mongolia. The available source material does not provide a breakdown by location, vessel type, platform, pollutant volume or individual incident.
THE QUESTIONS THIS EVENT LEAVES BEHIND
How much of the estimated affected area is associated with ships compared with offshore oil platforms?
What methods were used to distinguish oil slicks from natural surface features?
Which ocean regions account for the largest share of the reported area?
How much oil is represented by the estimated surface coverage?
What regulatory or industry actions, if any, are proposed in response to the estimate?
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GLOBAL CURIOSITY MAP · SEPTEMBER 2026