But a clever person on Flickr found the original image, and this is neither trash nor the central Pacific nor a gyre. The land is Japan and the swirl is a large eddy with a plankton bloom in it. The bloom is probably a single-celled algae called “coccolithophores” which are known to form large blooms that turn the water pale blue.
Eddies commonly break off of the Kuroshio Current near Japan (it’s the Gulf Stream of the Pacific) and go swirling about on their own for weeks or months, trapping plankton inside. Since plastic is transparent and does not reflect much light, the tiny bits of trash in the North Pacific Gyre cannot currently be seen by satellite.