[sit-rep]

Thanks for the reply... I grew up near an ANG base before the population in the area complained enough to get them to stop breaking the sound barrier over the lake... All I can remember is K-Boom... I slight preliminary K-... Do not recall two distinct Booms as discussed here.

Could it be the jets were so close it combined them?

[jws3sticks]

Thanks for the kind message.

I think the science is there. I think the diagram is what happens. It might change with wind, actual air speed and a bunch of other factors.

I always remember the double bang in the San Fernando Valley as a kid in the 50's and 60's.

Once the plane is faster than the "speed of sound", 1,100 feet per second, as I recall, you get the sonic booms.

Maybe someone has more science to add to this posting. I hope so.