The association between ionospheric and geomagnetic pulsations in the Pc3-4 range at mid-latitudes

Details The association between ionospheric and geomagnetic pulsations in the Pc3-4 range at mid-latitudes The association between ionospheric and geomagnetic pulsations in the Pc3-4 range at mid-latitudes

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989p%26ss...37.1079t&link_type=abstract

Planetary and Space Science (ISSN 0032-0663), vol. 37, Sept. 1989, p. 1079-1083, 1085-1094. Research supported by the Australian

Computer Science

19

Geomagnetic Micropulsations, Magnetohydrodynamic Waves, Midlatitude Atmosphere, E Region, F Region, Magnetic Signatures, Phase Deviation, Power Spectra, Space Plasmas

Scientific paper

The response of the ionosphere to hydromagnetic waves in the Pc3-4 range has been investigated using an induction magnetometer and a digital ionosonde at Beveridge, Australia. Doppler shift measurements on four space radio frequencies have been made to monitor simultaneously the response of the E- and F-regions. E-region fluctuations correlated with P-3 activity have been observed for the first time. Excellent correlation is sometimes observed between magnetic pulsations and both E- and F-region fluctuations. The lack of correlation more often observed is probably caused by ionospheric irregularities which produce RF interference effects in the Doppler measurements. Nine events exhibiting particularly high correlation have been analyzed in detail. The phase differences between the magnetic and ionospheric data varied from event to event, such that different events are consistent with different theoretical mechanisms. This indicates the complex nature of the interaction of hydromagnetic waves with the ionosphere at mid-latitudes.

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