Generation of VLF emissions during the substorm preliminary phase and the auroral dynamics at the auroral oval northern edge |
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| Authors: | I. A. Kornilov T. A. Kornilova |
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| Affiliation: | 1.Polar Geophysical Institute (PGI), Apatity Division, Kola Science Center,Russian Academy of Sciences,Apatity, Murmansk oblast,Russia |
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| Abstract: | ![]()
About 100 breakups of different types and intensities are studied on the basis of Lovozero Observatory data. Magnetic pulsations in different frequency ranges, VLF emissions, and auroral activity are analyzed using the TV data. It is found that magnetic pulsations in all frequency ranges lag behind the moment of breakup by 0.5–2.0 min, and bursts of low-intensity broadband VLF emission hiss are observed 3–10 min before breakup. Hiss leading breakup corresponds to feeble auroras located northward of a pre-breakup arc. |
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