Association of Pc4-5 waves with near-equatorial electron fluxes during substorm activity

Abstract:

The Pc4-5 ULF waves (2 – 22 mHz) excited by substorm activity often coincide with quasi – periodic modulation of the near-equatorial electron population. In this work we examine the association between near-equatorial electron flux variation and Pc4-5 waves excited by substorm activity using multipoint observations. We apply cross-wavelet and wavelet coherence analysis to the magnetic field and flux time-series in order to obtain a comparison in the frequency-time space.