http://earthobservatory.nasa.gov/New...lights_lrg.jpg

The original it was taken from.. then MSPaint altered. I say mspaint because of the brush used and the ISAT letters blur pattern.

The brush used is the "Spray Paint Can" from MSPaint, set to the smallest of the 3 options. Also, were it to be in photoshop, the "creator" would surely use "high quality jpeg" and not "4 / 10". MSPaint has trouble making quality jpeg's and uses an obscure anti-aliasing method to colors to mesh. When colors contrast, they heavily bleed outward, as can be seen around the "ISAT GeoStar 45" white text over the blue ocean.