The solar causes of geomagnetic disturba
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V. P. Mikhailutsa; M. N. Gnevyshev
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Article
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1985
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Springer
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English
โ 618 KB
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 h