Earth, Planets and Space
Previous studies have shown that auroral luminosity oscillations are often associated with substorms. Here we examine photometer data for the magnetospheric substorm on April 1, 2000 (expansive phase onset at 0525 UT) to study the detailed timing of the auroral oscillations relative to onset. Accurate timing information for the periodicities in the photometer data were determined using the wavelet transform. We find that the oscillations occur primarily during the recovery phase.
Martin, P.; Turner, Niescja E.; and Wanliss, James A., "Timing of Substorm Related Auroral Oscillations" (2009). Ocean Engineering and Marine Sciences Faculty Publications. 71.