I felt it too! It's my day off today so i was sat on YT till just after 1am. I felt my chair vibrate underneath me...i thought it was odd and sat there for a couple of minutes trying to work out what it was...we have a busy road at the back of us but at that time in the morning there is little to no traffic...then i thought it must have been something to do with the Airbase here...so i thought no more of it until i saw the news today!