Apart from the fact that it is much easier to find them in the light, yes some do appear to die down. Despite complaints about the lighting some planets get really dark! I have dropped down into canyons so black it feels like you're sinking in a pool of oil, and ships lights suddenly feel very inadequate to identify whether that little POI was just an outcrop or a field of geysers.
Some seem to die down almost completely during the night, I would expect these to be the cold features, carbon dioxide geysers etc and that's the behaviour I would expect from features driven by the heat of the star, iron magma fumaroles I would expect to be active all the time since I wouldn't expect the stars heat to be responsible for something that hot, but I haven't really had the opportunity to test properly. One of my iron magma sites was very active in the late dusk when I found it, pinpoints of red light all over the valley floor and up the walls.