Obiwan
Sounds like a long shot to me.
The shock wave would have been significanly depleted after 100 Km.
I've been over Mach 2.5 climbing through 50,000 ft in an F111E over Texas USA and no one noticed except me. It was awesome.
But Texans were used to calling big (BUFF) noises and sonic bangs the "Sounds of Freedom" in the 70s.