Pc1 pulsation polarization and electron precipitation at College, Alaska

Details Pc1 pulsation polarization and electron precipitation at College, Alaska Pc1 pulsation polarization and electron precipitation at College, Alaska

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985p%26ss...33.1277c&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 33, Nov. 1985, p. 1277-1282.

Computer Science

1

Electron Precipitation, Geomagnetic Pulsations, Polarization (Waves), Alaska, Extremely Low Radio Frequencies, Plasma Waves, Riometers

Scientific paper

In this paper a study of the association between the polarization states of Pc1 and ULF pulsations (primarily IPDP) and electron precipitation recorded at College, Alaska in 1983 is described. The study indicates that there is no direct association of precipitating electrons with Pc1 pulsations exhibiting left-hand polarization at the ground. A total of 33 pulsation events which occurred in the afternoon magnetosphere during the first four months of 1983 were examined. Twenty-five of the pulsations were right-hand polarized and eight were left-hand polarized. Particle precipitation was observed during 16 of the right-hand polarized events and four of the left-hand polarized events. These results indicate that the handedness of a pulsation event is not a good predictor of associated electron precipitation. Recent investigations have shown that the propagation of Pc1 waves in a multicomponent plasma can account for mixed polarization signatures on source field lines. The results then indicate that the identification of a source field line based upon polarization information alone may be incorrect.

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