Mid-latitude ionospheric effects of a great geomagnetic storm

Details Mid-latitude ionospheric effects of a great geomagnetic storm Mid-latitude ionospheric effects of a great geomagnetic storm

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jastp..66.1085m&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 66, Issue 12, p. 1085-1091.

Physics

3

Geomagnetic Storm, Ionosphere, Positive And Negative Effects

Scientific paper

On March 13, 1989 magnetic storm effects on the mid- and low-latitude ionosphere were investigated. For this, peak electron density of F2-layer (NmF2) data from four chains of ionospheric stations located in the geographic longitude ranges 10°W-15°E, 55°E-85°E, 135°E-155°E and 200°E-255°E were used. Relative deviations of perturbed NmF2 from their respective quiet-time values were considered. Long-lasting negative storm effects were the dominant characteristic observed at middle latitudes, which occurred since the main phase of the storm. In general, the most significant negative disturbances were observed at middle-high latitudes. In the longitudinal sectors in which the storm started at day-time and pre-dusk hours, positive storm effects at middle and low latitudes were observed during the main phase. The role of some physical mechanisms to explain the ionospheric effects is also considered.

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