Observations of evening magnetic pulsations in the auroral zone during the substorm

Details Observations of evening magnetic pulsations in the auroral zone during the substorm Observations of evening magnetic pulsations in the auroral zone during the substorm

Nov 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jatp...38.1177k&link_type=abstract

(International Union of Radio Science and International Association of Geomagnetism and Aeronomy, Symposium on the Physics of th

Physics

2

Auroral Zones, Geomagnetic Pulsations, Magnetospheric Instability, Plasmapause, Polar Substorms, Plasma-Particle Interactions, Sonograms, Wave Propagation

Scientific paper

Recent observations of evening magnetic pulsations at four Finnish ground stations from L = 6.1 to L = 3.4 have been investigated in order to study the development of Pc 1-2 and IPDP pulsations during isolated substorms. According to the preliminary analysis, these pulsations consist of unstructured Pc 1-2 waves and a subsequent IPDP event appearing before and after the onset of the substorm, respectively. Pc 1-2 waves seem to merge into the IPDP at a certain site, but a distinct gap appears in the recordings of the stations north of that site. The IPDP source field lines seem to be south of the region where the Pi waves associated with the substorm are generated.

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