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The pictures were snapped by the space agency's Operational Land Imager (OLI) on their Landsat 8 satellite.
Climate experts have suggested the discolouration is simple down to a phytoplankton bloom
Landsat 8, which was launched in February 2013 from Vandenberg Air Force Base, California, is part of the US Geological Survey which maps the world’s landmasses.
It orbits the globe at an altitude of 438 miles (705 km) and takes more than 700 pictures a day.
The satellite covers the entire globe every 16 days.
The on-board Operational Land Imager (OLI) camera and the Thermal Infrared Sensor (TIRS) are so powerful capable of zooming in on individuals in the crowd at a baseball game.
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