AE index variability during corotating fast solar wind streams

Details AE index variability during corotating fast solar wind streams AE index variability during corotating fast solar wind streams

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jgra..11006105d&link_type=abstract

Journal of Geophysical Research, Volume 110, Issue A6, CiteID A06105

Physics

5

Interplanetary Physics: Interplanetary Magnetic Fields, Interplanetary Physics: Solar Wind Plasma, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Magnetospheric Physics: Magnetic Storms And Substorms (7954)

Scientific paper

We examine the AE index variability while 12 corotating fast solar wind streams pass the Earth during the ascending phase of the ongoing solar activity cycle. We apply the Discrete Fourier Transform analysis to the associated interplanetary magnetic field (B) data and AE time series with ~1 min resolution. Results show noticeable periodicities in the 1-10 hour range. Moreover, the B and AE periodicities in each event are well correlated. For this reason a direct relationship between interplanetary Alfvénic waves and AE oscillations is proposed while those streams pass the Earth.

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