I heard the sonic boom while sat on the sofa with the kids. You could tell it was a really loud noise, some distance away. It was loud enough to have me heading up stairs to look out of a front window, that has “views” over sunny Brentwood. Not really sure I was expecting to see much, as I thought it was a fair distance away, but looked west towards London wondering whether I’d see a mushroom cloud !!
So I guess that leads me to have two questions. Please excuse my naivety
1) Sonic booms …. the build up of air pressure around the plane, right? But when it goes pop! Does the pressure start to build up again? If I was closer to the jet would the sound have been louder? Or is it more like a sonic wake ??
2) Your common all garden improvised terrorist thermonuclear device (as opposed to a massive Russian mega bomb)… If indeed set off in central London, would I hear it in sunny Brentwood (20 odd miles away) ??