[zeestephen]

As I recall, a sonic boom is not a one time event.

From memory, it repeats again and again under the flight path, until the plane speed is sub-sonic.

[Afterguard]

Well sort of.... Every point directly beneath and across the flight path will experience a short duration “boom” as the aircraft passes overhead. So, yeah, it’s possible people in several counties could hear it as time and flight path went by. Just my $.02.

But you already knew that. ☺

[TexasGator]

“From memory, it repeats again and again under the flight path, until the plane speed is sub-sonic.”

It is a continuous pressure wave the travels with the plane.

The ‘boom’ is experienced as the pressure wave passes.