On the periodic variations of secondary cosmic rays and the geomagnetic Pc 4 pulsations in BMAr

Abstract

In a set of balloon ̄ights in the Brazilian magnetic anomaly region (BMAr) short time periodic variations were observed, i.e. pulsation, of secondary charged and neutral particle ̄uxes, Xand c-ray ̄uxes with amplitudes of about 2±4%. The pulsations are accompanied by the geomagnetic Pc4 pulsations and have similar periodicity. The phenomenon was observed… (More)

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