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LiveScience
LiveScience
Harry Baker

Earth from space: Ethereal algal vortex blooms at the heart of massive Baltic 'dead zone'

Earth Baltic Sea NASA Earth Observatory the Gulf of Finland West Virginia
A massive green swirl of algae in the sea.
quick facts

Where is it? The Gulf of Finland in the Baltic Sea.

What's in the photo? A swirling mass of algae trapped in an ocean vortex.

Which satellite took the photo? Landsat 8.

When was it taken? July 18, 2018.

This striking green spiral emerged in the Baltic Sea during a massive algal bloom in 2018. While the swirling microbes have an ethereal beauty in the image, this belies an unseen danger they brought with them as they created a massive, toxic "dead zone."   

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