Recent findings support something solid in Jupiter, just mostly gas, so odds are against something being able to pass clear through, but not impossible.
But it is strange how the scar seems stationary and growing.
Further observations could prove that it's not an impact at all. It could be the planets natural reaction of it's approach to the "Galactic Plane", like Saturns hexagon, or the Earths increase in lightning.
Magnetics can do strange things, on the nano scale, on the planetary scale, and even on the Galactic scale.
The first photo is Saturns sudden Hexagon shape, the second is an Aroura on Saturn caused by a CME(coronal mass ejection) last year.