Physics
Scientific paper
Mar 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jatp...39..295m&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 39, Mar. 1977, p. 295-302.
Physics
Electromagnetic Absorption, Geomagnetic Micropulsations, Ionospheric Propagation, Magnetic Effects, Radio Attenuation, Intermediate Frequencies, Low Frequencies, Midlatitude Atmosphere
Scientific paper
Data of Pc 1-type micropulsations and ionospheric absorption derived from measurements at mid-latitudes were analyzed during and after geomagnetically disturbed periods. In comparison to the normal Pc 1 activity, a rather reduced one has been found during disturbed conditions. A distinct increase of Pc 1 activity occurred, however, after selected key days in the investigated interval between days '+2' and '+7'. A clear after-effect could also be shown for ionospheric absorption, measured at three frequencies in Kuehlungsborn (55 N) and a quite moderate one at somewhat lower geographic latitudes (48-49 N). In Kuehlungsborn the ionospheric after-effect is particularly prominent at all investigated frequencies in case of a simultaneous after-effect in Pc 1 pulsations. It is restrained in the LF-range and missing in the MF-range when the after-effect is lacking in Pc 1 pulsations.
Märcz F.
Verö Joseph
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