It is associated with phosphene conversion, and the earliest theories posited that it was a drifting island.  
It is associated with phosphene conversion, and the earliest theories posited that it was a drifting island.  Approximately 300 years old, it is upstream from the Wake Anomaly, but has two rivals in the newly discovered "white ovals."  It is an anticyclonic region that rotates anticlockwise with a period of six days.   Much colder and at a higher elevation than its surroundings, at its largest it measures 40 thousand by 14 thousand kilometers.  FTP, name this massive storm centered at 22 degrees south latitude on Jupiter's surface.
It is associated with phosphene conversion, and the earliest theories posited that it was a drifting island.  
Great Red Spot or GRS