Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1768183 | Advances in Space Research | 2008 | 4 Pages |
Abstract
By using data from GPS receivers we detected huge-amplitude solitary large-scale traveling acoustic-gravity waves (LS AGW) which manifested themselves as perturbations of total electron content (TEC) of duration of about 40Â min. Originated in the auroral area after significant alterations of geomagnetic field intensity during geomagnetic storms on 29-30 October 2003, LS disturbances propagated with a velocity about 1000-1200Â m/s and caused generation of secondary small-scale (SS) waves with time period of 2-10Â min. Such SS structure followed the solitary intensive AGW at a distance more than 4000Â km. However, we observed such phenomenon only within the territory with high values of “vertical” TEC and steep gradients of TEC. Apparently, these conditions are necessary for generation of SS waves due to propagation of LS AGW.
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Earth and Planetary Sciences
Space and Planetary Science
Authors
E.I. Astafyeva, E.L. Afraimovich, S.V. Voeykov,