Outward Bound
Alyssa finds the vehicle's operation straightforward and not difficult. It even has headlights, which are much appreciated in the darkness. The slope of the crater is a fairly simple trail to follow, and as long as she steers around the occasional rock slide or patch of heavy vegetation, her progress is fairly steady, chasing after the sunset that was scattered by the strange purplish cloud.
As she makes her way along, slowly and safely, Alyssa notices two competing sets of illumination visible to her. The first is the giant wall of fog itself, which seems to shimmer with it's own internal luminescence. She's too far away to discern more. Closer at hand, Alyssa sees sparks bursting along the ground. Slightly bluish, seemingly random in size, frequency, and distribution, the area affected seems to be right in her path.