Multistation measurements of Pc5 geomagnetic power amplitudes at high latitudes

Details Multistation measurements of Pc5 geomagnetic power amplitudes at high latitudes Multistation measurements of Pc5 geomagnetic power amplitudes at high latitudes

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998jgr...10329455b&link_type=abstract

Journal of Geophysical Research, Volume 103, Issue A12, p. 29455-29466

Physics

9

Interplanetary Physics: Planetary Bow Shocks

Scientific paper

Geomagnetic data from four Antarctic stations, located at -80 corrected geomagnetic (CGM) latitude, have been analyzed. The magnetic local time (MLT) occurrence distributions and seasonal dependence of geomagnetic power levels in the Pc5 frequency band are studied. It is found that the pulsation power can be significantly influenced by the MLT location of the station at the specific UT time considered, regardless of interplanetary conditions or geomagnetic activity. A shift of power amplitudes toward higher values is found during local summer, likely in association with the increased ionospheric conductance. The local dayside summer increase of power relative to the winter condition is higher than on the nightside. This finding is explained by the magnetospheric cusp influence on the production of geomagnetic power.

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