That's interesting. It doesn't look as "messy" like the shoemaker-levy9 impacts. It seems to be more organized, and the three smaller dark spots are pretty evenly spaced and fanned from the main spot. Odd that no prior cometary displays have been noted, as one would expect from an impactor to create a hole that size.
Wacky hypothesis, but what if Jupiter is responding to the changing electrical environment of the solar system, as indicated in the relatively weak output of the Sun. We know from the Bennett relation that the diameter of a Birkeland filament is inversely proportional to current density. Greater current density = smaller diameter, lesser current density = larger diameter. What if the diameters of the current filaments impinging on the sun have increased, and some of the current is now available to Jupiter. Might that help explain the lowered output of the sun? F10 radio flux was about as low as ever recorded just a few days ago. Jupiter's outflow of energy exceeding it's inflow from the Sun is another of those mysteries to mainstream theory. Might Jupiter be scavenging some of the current supplying the Sun?
Could this be a Jupiterspot?
I'd like to see if Jupiters auroral ring is affected and/or if this dark spot is along the circumference of the ring.
It will be interesting to see the morphology of this area over the next few days.