The Great Red Spot is a persistent high-pressure region in the atmosphere of Jupiter, producing an anticyclonic storm, the largest in the Solar System, 22 degrees south of Jupiter’s equator. It has been continuously observed since 1830.Earlier observations from 1665 to 1713 are believed to be of the same storm; if this is correct, it has existed for at least 350 years. The Great Red Spot’s dimensions are 24–40,000 km × 12–14,000 km. It is large enough to contain two or three planets of Earth size. Night Tone. Zoom In. Elements of this video furnished by NASA. Full HD.