Abstract
A question concerning the influence of permanent Pc3-band pulsations (periods from 10 to 45 s) on the excitation of sporadic Pi2-band pulsations (40 to 150 s) is raised. It is hypothesized that, being generated ahead of the front of the Earth’s magnetosphere, the Pc3 penetrate into the geomagnetic tail where they cause local depression in the electric current in the neutral sheet and, under favorable conditions, initiate tearing instability. This leads to the reconnection of the magnetic field lines and explosion-like release of the magnetic energy stored in the tail. As a result, a substorm arises with the sporadic Pi2 pulsations being its important element. Ways are suggested to theoretically substantiate and experimentally validate this hypothesis.
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Original Russian Text © A.V. Guglielmi, 2015, published in Fizika Zemli, 2015, No. 3, pp. 13–17.
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Guglielmi, A.V. On permanent and sporadic pulsations of the magnetosphere. Izv., Phys. Solid Earth 51, 331–335 (2015). https://doi.org/10.1134/S1069351315030040
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DOI: https://doi.org/10.1134/S1069351315030040