Electric field oscillations measured near an auroral arc |
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| Authors: | Paul M Kintner Lawrence I Cahill |
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| Institution: | School of Electrical Engineering, Cornell University, Ithaca, NY 14853, U.S.A.;Space Science Center and Physics Department, University of Minnesota, Minneapolis, MN 55455, U.S.A. |
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| Abstract: | A sounding rocket, launched into the expansive phase of an auroral substorm, measured bursts of electric field oscillations with a typical period of one second and a magnitude exceeding 20 mV/m. The oscillations appear to be due to an MHD wave propagating along the magnetic field. The bursts were observed as the sounding rocket passed over the southern border of an auroral arc. The southern border coincided with an increase in 1–5 keV electron flux and an increase in field-aligned current. |
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