The largest dark area, located at the north pole, corresponds to the enigmatic Lei-Kung Fluctus region. This region is a very large, cool and stable lava flow area produced by an unknow volcano. Much smaller caldera, visible on the Voyager image, are also detected on this Keck data. Note that we do not detect any obvious presence of outburst on the limb of the satellite as it has been once detected on the Io images taken during the Keck II AO science verification phase . I AO night.
North is Up and East is Left A map of the hot spot locations.
I AO image. The complex array of streaks indicates that the crust has been fractured. The lack of mountains or craters on Europa's bright limb is consistent with an ice surface. In contrast to its icy neighbors, Ganymede and Callisto, Europa has few impact craters. One possible candidate is the small feature near the center of this image with radiating rays and a bright circular interior.