The ULF modulation of ELF-VLF emissions close to the magnetospheric boundary

Morrison, K.; Engebretson, M. J.; Beck, J. R.; Johnson, J. E.; Arnoldy, R. L.; Cahill, L. J.; Carpenter, D. L.. 1994 The ULF modulation of ELF-VLF emissions close to the magnetospheric boundary. In: Holtet, Jan A.; Egeland, Alv, (eds.) Physical Signatures of Magnetospheric Boundary Layer Processes. Dordrecht, Springer, 375-381. (NATO ASI Series. Series C: Mathematical and Physical Sciences, 425).

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The spatial extent and temporal behaviour of quasi-periodic (QP) intensity modulations of 0.5-2kHz ELF-VLF emissions were investigated in a comparative study of data collected at three Antarctic stations. Frequently, the waveforms of the ELF-VLF signals received at each site were identical. The emissions are identified with the periodic modulation of the electron pitch-angle distribution by the propagation of ULF compressional fast-mode waves through a region. In addition to generation close to the equatorial plane, we propose an additional high-latitude source of QP emissions. These emissions are associated with regions of minimum-B produced by the dayside compression of the magnetosphere close to the magnetopause.

Item Type: Publication - Book Section
Digital Object Identifier (DOI):
Programmes: BAS Programmes > Pre 2000 programme
ISBN: 9789401044578
Date made live: 29 Mar 2017 08:50 +0 (UTC)

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