We went out in the pasture at about 6:00 AM to walk the pups in the pre dawn moon light before going to work. Looked south to see a white fan shaped cloud emitting from an object that wasn't really very visible heading upward and to the west, then arcing and descending just a little and apparently fizzling out rather quickly. The scene covered a small portion of the sky, but was striking and memorable. I was delighted to see that apparently it was visible in California and Nevada as reported by others earlier. I want to more about it.