 About an hour after fragment K entered Jupiter , observers recorded auroral emission near the impact region , as well as at the antipode of the impact site with respect to Jupiter 's strong magnetic field . The cause of these emissions was difficult to establish due to a lack of knowledge of Jupiter 's internal magnetic field and of the geometry of the impact sites . One possible explanation was that upwardly accelerating shock waves from the impact accelerated charged particles enough to cause auroral emission , a phenomenon more typically associated with fast @-@ moving solar wind particles striking a planetary atmosphere near a magnetic pole . 
