The Great Red Spot, which is the most noticeable feature on Jupiter's surface is a storm about 12,400 miles (20,000 kilometers) wide, about two to three times larger than Earth. Vertical surges hold the key to The Great Red Spot's longevity. The Great Red Spot is a persistent high- pressure region in the atmosphere of Jupiter, producing an anticyclonic storm 22 degrees south of the planet’s equator.
The reason that the storm has continued to exist for centuries is that there is no planetary surface to provide friction (only a liquid core of hydrogen); circulating gas persists for quite a long time in the atmosphere because there is nothing to oppose their angular momentum.
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