[bert]

——Was it internal or external-—

The knowledge is beyond my capacity

However. .....
The dots are in an arc on the same plane indicating the possibility of external strikes over a short time a la the strike on Jupiter. Except, the article says the rotation is slow and that means the interval between strikes is not short.

My thought was after seeing a recent piece on strikes on earth, and given the path of the strikes on both Jupiter and Uranus, perhaps it would be worth some scholars effort to determine if there are similar traces on Earth or Mars.

To speculate, comet would be a good guess based on the Jupiter incident. It was recently stated that Uranus has Rings. Perhaps the rings are the source of material that gave up resiting the gravity

[rollo tomasi]

"Perhaps the rings are the source of material that gave up resiting the gravity"

I am a extreme armature when dealing with the Cosmos, but your observation seems very plausible (Besides a "stealth" comet).

[MrKatykelly]

If its a tangential strike, maybe its just “skipping”.