Fig. 4From: Auroral streamer and its role in driving wave-like pre-onset aurora(Adopted from Radioti et al. (2008)) A The auroral image of Saturn’s polar region from Cassini UVIS at 21:49 UT on May 20, 2013, adopted from Radioti et al. (2016). B The auroral image of Jupiter’s polar region from HST at 05:37 on March 5, 2007Back to article page