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On Cosmic Rays, IP Structures and Geospace Consequences During WHI

Published online by Cambridge University Press:  21 October 2010

A. Dal Lago
Affiliation:
National Institute for Space Research (INPE), Sao Jose dos Campos, Brazil email: [email protected]
F. L. Guarnieri
Affiliation:
Universidade do Vale do Paraiba (UNIVAP), Sao Jose dos Campos, Brazil
M. R. da Silva
Affiliation:
National Institute for Space Research (INPE), Sao Jose dos Campos, Brazil email: [email protected]
W. D. Gonzalez
Affiliation:
National Institute for Space Research (INPE), Sao Jose dos Campos, Brazil email: [email protected]
C. R. Braga
Affiliation:
National Institute for Space Research (INPE), Sao Jose dos Campos, Brazil email: [email protected]
N. J. Schuch
Affiliation:
Southern Regional Space Research Center (CRS/INPE), Santa Maria, Brazil
K. Munakata
Affiliation:
Physics Department, Shinshu University, Japan
C. Kato
Affiliation:
Physics Department, Shinshu University, Japan
J. W. Bieber
Affiliation:
Bartol Research Institute and Department of Physics and Astronomy, Univ. of Delaware, USA
T. Kuwabara
Affiliation:
Bartol Research Institute and Department of Physics and Astronomy, Univ. of Delaware, USA
M. Tokumaru
Affiliation:
Solar-Terrestrial Environment Laboratory, Nagoya University, Japan
M. L. Duldig
Affiliation:
Australian Antarctic Division, Tasmania, Australia
J. E. Humble
Affiliation:
School of Mathematics and Physics, University of Tasmania, Tasmania, Australia
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Abstract

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This work presents some observations during the period of the Whole Heliosphere Interval (WHI) of the effects of interplanetary (IP) structures on the near-Earth space using three sets of observations: magnetic field and plasma from the Advanced Composition Explorer (ACE) satellite, ground-based cosmic ray data from the Global Muon Detection Network (GMDN) and geomagnetic indices (Disturbance storm-time, Dst, and auroral electrojet index, AE). Since WHI was near minimum solar activity, high speed streams and corotating interaction regions (CIRs) were the dominant structures observed in the interplanetary space surrounding Earth. Very pronounced geomagnetic effects are shown to be correlated to CIRs, especially because they can cause the so-called High-Intensity Long-Duration Continuous AE Activity (HILDCAAs) - Tsurutani and Gonzalez (1987). At least a few high speed streams can be identified during the period of WHI. The focus here is to characterize these IP structures and their geospace consequences.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2010

References

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