Space Shuttle
The shuttle Atlantis passed above the USArray on June 22, 2007. It would ordinarily have landed in Florida but was diverted to Edwards AFB due to bad weather on the east coast. The shuttle flew past USArray station 109C at ~ Mach 5 and an elevation of nearly 40 km. The sonic boom from the shuttle swept across the ground behind the shuttle and was recorded clearly by the broadband seismic instruments. The sonic boom can be seen on these plots of unfiltered seismograms at 19:43.05 as the double high-frequency pulse.