While waiting for my connecting flight, people at the airport were amazed to see these blue ray patterns on the easter sky. I took my camera out and took several shots of this strange phenomena. We thought the blue rays were caused by some jet streams or some powerful search lights. We thought some UFOs caused the strange streaks. The blue rays remained in those positions for some 25 minutes till the sunset was over. I still dunno what caused those blue streaks till this day. Perhaps you have experienced this same sky phenomenon?