IT WAS A TRIDENT ICBM MISSILE FIRED OFFSHORE BY THE SUB USS KENTUCKY. Not opinion, FACT.
Confirmed by the US Navy.
The U.S. Navy eventually announced that this was a Trident II unarmed missile launch, testing the system from a submarine out in the ocean.

https://twitter.com/RonBaalke/status/663182391964372992

What was the bright streak seen in the sky tonight? Seen in California.
Here’s a picture caught by someone in Pasadena, CA

Reports are that it was the Taurid Meteor Shower, which is especially active this year. Reference.