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On Cosmic Rays, IP Structures and Geospace Consequences During WHI

  • A. Dal Lago (a1), F. L. Guarnieri (a2), M. R. da Silva (a1), W. D. Gonzalez (a1), C. R. Braga (a1), N. J. Schuch (a3), K. Munakata (a4), C. Kato (a4), J. W. Bieber (a5), T. Kuwabara (a5), M. Tokumaru (a6), M. L. Duldig (a7) and J. E. Humble (a8)...

Abstract

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.

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References

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On Cosmic Rays, IP Structures and Geospace Consequences During WHI

  • A. Dal Lago (a1), F. L. Guarnieri (a2), M. R. da Silva (a1), W. D. Gonzalez (a1), C. R. Braga (a1), N. J. Schuch (a3), K. Munakata (a4), C. Kato (a4), J. W. Bieber (a5), T. Kuwabara (a5), M. Tokumaru (a6), M. L. Duldig (a7) and J. E. Humble (a8)...

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