Streak of horizontal light over Long Beach

We were looking up at the southwestern sky for the Jupiter/Saturn conjunction on December 21. It was close to sunset but there was still light in the sky. Out of nowhere a flash of light streaked HORIZONTALLY to the right of us.  This object was not falling, it was flying absolutely horizontal and traveling south, away from us. The object was close and low.  It was a very bright,  white streak of light with a blue color in the front and then the long white streak or tail. As fast as it appeared, it disappeared. The tail caught up with the front. It sped up and vanished. This was a 3-4 second event. It made no noise.   I turned to my friend and asked if he just saw that. He said yes. Again, the object was flying horizontally. I have never seen anything like this before..