Dayside Pi 2 pulsations at low latitudes

Details Dayside Pi 2 pulsations at low latitudes Dayside Pi 2 pulsations at low latitudes

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989georl..16..887s&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 16, Aug. 1989, p. 887-890.

Physics

55

Daytime, Earth Magnetosphere, Geomagnetic Pulsations, Magnetic Storms, Tropical Regions, Auroral Electrojets, Geosynchronous Orbits, Temperate Regions

Scientific paper

In this paper we investigate the occurrence of dayside Pi 2 geomagnetic pulsations at low and mid latitudes. The technique of data adaptive filtering is used to identify Pi 2s concealed by the presence of typical daytime Pc type pulsations. Convincing new evidence is presented demonstrating that Pi 2 pulsations occur simultaneously in both the nightside and dayside hemispheres at low latitudes. Dayside Pi 2s are occasionally identified at mid latitudes.These results have implications with regard to the source mechanism for low latitude Pi 2 pulsations and allude to a global cavity mode.

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