Mid-latitude ionosphere during two great geomagnetic storms

I. M. Vasiljevic, L. R. Cander

Abstract


The ionospheric disturbances observed at many European ionosonde stations in association with the severe geomagnetic storms occurring on 19-20 December 1980 and 11-12 April 1981 were investigated by using the available ionospheric and geomagnetic data. During these storms the ionospheric F region underwent major changes at all mid-latitudes. However, the variations from storm to storm were much larger at lower mid-latitudes. These results support the view that even in assessing the response of the mid-latitude ionosphere to severe geomagnetic storms it is necessary to distinguish carefully between global, regional and local behaviour.

Keywords


mid-latitude ionosphere;ionospheric disturbances;modelling;forecasting;computer images

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References


DOI: https://doi.org/10.4401/ag-4014
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Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia - ISSN: 2037-416X