An earthquake initiates end-times, but is overlooked because it is encoded as a “knock” in Rev 3:20–that ancient lukewarm church ended in an earthquake. Also “the Lord will roar…the heavens and earth will shake” Joel 3:16, is a response to when Muslims take Jerusalem in Zech 14:1,2.  The “roar” is also seen as “thunder” in Rev 6:1 and the “roar” in Rev 10:3.  If you have questions, you may call me, 928 583 7543