TIME FLUCTUATIONS OF CHARGED AND NEUTRAL COSMIC-RAY COMPONENT FLUXES AS MEASURED IN THE REGION OF THE BRAZILIAN MAGNETIC ANOMALY

Measurements of charged particles, gamma emission and neutrons were fu lfilled on balloon in the region of the Brazilian magnetic anomaly on 8 November 1991. The flight lasted approximately 18 hours, including 1 5 hours on the ceiling at the height of 32 km just during the beginnin g of the recovery phase of the moderate geomagnetic storm. The main co nclusion from the analysis of the obtained experimental data is the fo llowing: a) the fluxes of charged and neutral particles were measured and are in agreement with the data of previous works for the close val ues of geomagnetic cut-off rigidity; b) no sporadic increases of charg ed- and neutral-particle fluxes were recorded; c) the pulsations of ch arged particles, gamma-rays and neutrons with characteristic time of a pproximately 30 min were found. The sporadic pulsations of charged par ticles and gamma-rays with shorter periods were observed too. But late r pulsations were absent in the neutron flux data. This points to the magnetospheric origin of the observed phenomenon.