It was HUGE...It just suddenly appeared in the middle of a dark horizon...and lasted until it disappeared low in the horizon behind trees in my neighborhood. The fire/flame was distinctly split when it appeared...coming off each side of a dark circle or center...and I'm almost positive the flames were long trails of purple and blue... IT WAS INCREDIBLE...JUST INCREDIBLE...And I hope to be lucky enough to see another one so clearly and close someday...lol