Meteoroid sonic shock-wave-generated seismic signals observed at a seismic array

Seismic signals recorded at the Yellowknife seismic array in the Northwest Territory of Canada coincided with the visual observation of a meteor in the sky overhead. The signals cannot be explained by any earthquake, explosion, or impact-generating mechanism. They are shown to be consistent with their having been generated by the shock wave created by the associated meteoroid as it passed through the atmosphere overhead. The meteoroid's trajectory and velocity, as inferred from the array records, is consistent with the observed direction of travel of the meteoroid and independent seismic observation recorded at two single stations in the Northern Canadian seismic network. (C.D.)