As is Seth's custom, during havoc he grants all colonies, mines, and outposts a number of crystals during havoc. A possible side effect of this action is that the satellite scans of other alliances become visible to everyone if they zoom out from the map to the point where the graphic representations become symbol representations. Satellite scans of other alliances appear as a vacant crystal symbol attached to nothing, and floating there for the duration of Havoc, seemingly regardless of the lifespan of the SatScan. More testing and research is necessary to determine the exact nature of these remnants, but I'll post images below:
Here is an image from directly above the ONE hive, notice the floating "crystal"
And here is the same area, but ONE is marked purple:
Thirdly, here is a zoomed in image of that same location, where nothing is seen:
And at another spot on the map, we see a second instance (there are two squads over the symbol, but it is clear that this crystal does not mark any kind of outpost or colony
And again, this same location, after the alliance MMO is marked purple:
When you zoom in, again, the symbol disappears.