Abstract
Periods of persistent, high-trace velocity infrasound activity have been routinely observed in the data from the CTBT/IMS I53US infrasound station in Fairbanks, AK. Previous studies of magnetic field disturbances and displays of aurora borealis suggested that these infrasound signals were generated as bow waves by moving auroral electrojets. Recent analysis of the data obtained from the Geophysical Institute Magnetometer Array, the Poker Digital All-Sky Camera, and historic data from the Poker Flat Imaging Riometer have demonstrated the presence of extended periods of infrasound signals during times of enhanced geomagnetic activity along with verification that the observed infrasound is being generated in the lower ionosphere. Further examination of these data sets and the I53US infrasound data provide a basis for comparison with idealized magneto-hydrodynamic models of geomagnetic auroral infrasound wave generation.
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