not an impact at all, this was a minature black hole which occured due to the CHAIN OF 3000 MILE LONG asteroids which hit it in 94'.  Basically, the hole is in the same spot as the previous impacts and when gas escapes it creates a vacuum..similar to a black hole.  Which in turn aborbs the atmosphere.  This then heals. The asteroids themselves are probably disintegrated and 'pooped out'..because that's what ammonia at 88 degrees can do eventually to shear rock.  Its like having a wound that heals itself immediately, pretty impressive photograph.  BTW...jus' curious..Don't you think someone in the world would catch an asteroid the size of earth hitting jupiter stupid? Ouch. Snap. Sup'