The solar causes of geomagnetic disturbances

descriptionPublicationkeyboard_double_arrow_right Article 01 Aug 1985 English Publisher:Springer Science and Business Media LLCJournal:Solar Physics, volume 98, pages 387-393 (issn: 0038-0938, eissn: 1573-093X,

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Authors: V. P. Mikhailutsa; M. N. Gnevyshev;

doi: 10.1007/bf00152468

The solar causes of geomagnetic disturbances

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Abstract

Geomagnetic disturbances have been identified with respect to their sources for 1977–1983. The disturbance level was found using the daily planetary index Ap. High-amplitude (∼ 50), mean-amplitude (∼24) and low-amplitude (∼ 12) disturbances are caused by solar flares of importance ≥ 1, coronal holes, and filament cavities, respectively. The ranges of probable amplitudes of disturbances of different nature and their relative number are found from Poisson random distributions of amplitudes.

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Pulkovo Observatory
Russian Federation

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