Open Access

Timing of substorm related auroral oscillations

Earth, Planets and Space200961:BF03352935

https://doi.org/10.1186/BF03352935

Received: 26 October 2007

Accepted: 16 August 2008

Published: 29 May 2009

Abstract

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.

Key words

Aurora substorm wavelet CANOPUS