Long period geomagnetic field fluctuations at Terra Nova Bay (Antarctica)

Details Long period geomagnetic field fluctuations at Terra Nova Bay (Antarctica) Long period geomagnetic field fluctuations at Terra Nova Bay (Antarctica)

Jun 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.1443v&link_type=abstract

Geophysical Research Letters, Volume 24, Issue 12, p. 1443-1446

Physics

9

Magnetospheric Physics: Mhd Waves And Instabilities, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions

Scientific paper

A statistical analysis of the power spectra (0.7-5 mHz) of the geomagnetic field components H and D recorded at Terra Nova Bay (Antarctica) during three austral summers close to the maximum of solar activity reveals power enhancements in the H component at ~3.3, 3.9 and 4.5 mHz, which become more evident during daytime intervals. During intervals characterized by higher solar wind speeds these spectral features more clearly emerge and are also accompanied by other enhancements at lower frequencies (~1.2, 1.9 and 2.7 mHz). The observed frequencies are close to the ones detected both at auroral and low latitudes.

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