Measurement of Vibrations from the 8- by 6-Foot Supersonic Wind Tunnel

Reverend Birkenhauer, a seismologist, and E.F. Carome, an electrical technician, from John Carroll University measure ground vibrations during the 8-by 6-Foot Supersonic Wind Tunnel first run with a supersonic engine. They found that the majority of the vibrations came from the air and not the ground.