<P> Careful tracking of atmospheric features revealed the spot 's counter-clockwise circulation as far back as 1966 , observations dramatically confirmed by the first time - lapse movies from the Voyager fly - bys . The spot is confined by a modest eastward jet stream to its south and a very strong westward one to its north . Though winds around the edge of the spot peak at ~ 120 metres per second ( 432 kilometres per hour ) , currents inside it seem stagnant , with little inflow or outflow . The rotation period of the spot has decreased with time , perhaps as a direct result of its steady reduction in size . </P>
<P> Careful tracking of atmospheric features revealed the spot 's counter-clockwise circulation as far back as 1966 , observations dramatically confirmed by the first time - lapse movies from the Voyager fly - bys . The spot is confined by a modest eastward jet stream to its south and a very strong westward one to its north . Though winds around the edge of the spot peak at ~ 120 metres per second ( 432 kilometres per hour ) , currents inside it seem stagnant , with little inflow or outflow . The rotation period of the spot has decreased with time , perhaps as a direct result of its steady reduction in size . </P>
how fast are the winds in the great red spot on jupiter
how fast are the winds in the great red spot on jupiter
peak at ~ 120 metres per second ( 432 kilometres per hour )
peak at ~ 120 metres per second ( 432 kilometres per hour )