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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Analysis of geomagnetic storm variations and count-rate of cosmic ray muons recorded at the Brazilian southern space observatory

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Author(s):
Everton Frigo [1] ; Jairo Francisco Savian [2] ; Marlos Rockenbach da Silva [3] ; Alisson Dal Lago [4] ; Nalin Babulal Trivedi [5] ; Nelson Jorge Schuch [6]
Total Authors: 6
Affiliation:
[1] University of São Paulo. Institute of Astronomy, Geophysics and Atmospheric Sciences. Department of Geophysics - Brasil
[2] UFSM. CT. Space Science Laboratory of Santa Maria - Brasil
[3] MCT. National Institute for Space Research. Division of Space Geophysics - Brasil
[4] MCT. National Institute for Space Research. Division of Space Geophysics - Brasil
[5] MCT. National Institute for Space Research. Division of Space Geophysics - Brasil
[6] MCT. INPE. Southern Regional Space Research Center - Brasil
Total Affiliations: 6
Document type: Journal article
Source: Revista Brasileira de Geofísica; v. 25, p. 159-162, 2007-00-00.
Abstract

An analysis of geomagnetic storm variations and the count rate of cosmic ray muons recorded at the Brazilian Southern Space Observatory -OES/CRS/INPE-MCT, in São Martinho da Serra, RS during the month of November 2004, is presented in this paper. The geomagnetic measurements are done by a three component low noise fluxgate magnetometer and the count rates of cosmic ray muons are recorded by a Muon Scintilator Telescope - MST, both instruments installed at the Observatory. The fluxgate magnetometer measures variations in the three orthogonal components of Earth magnetic field, H (North-South), D (East-West) and Z (Vertical), with data sampling rate of 0.5 Hz. The Muon Scintilator Telescope records hourly count rates. The arrival of a solar disturbance can be identified by observing the decrease in the muon count rate. The goal of this work is to describe the physical morphology and phenomenology observed during the geomagnetic storm of November 2004, using the H component of the geomagnetic field and vertical channel V of the multi-directional muon detector in South of Brazil. (AU)