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On cosmic rays, IP structures and geospace consequences during WHI


Dal Lago, A and Guarnieri, FL and da Silva, MR and Gonzalez, WD and Braga, CR and Schuch, NJ and Munakata, K and Kato, C and Bieber, JW and Kuwabara, K and Tokumara, M and Duldig, ML and Humble, JE, On cosmic rays, IP structures and geospace consequences during WHI, Proceedings of the 27th International Astronomical Union General Assembly, 3-14 Aug 2009, Rio de Janeiro, pp. 488-490. ISBN 978-1-107-00533-4 (2010) [Refereed Conference Paper]


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.

Item Details

Item Type:Refereed Conference Paper
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:High energy astrophysics and galactic cosmic rays
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Duldig, ML (Dr Marc Duldig)
UTAS Author:Humble, JE (Dr John Humble)
ID Code:71822
Year Published:2010
Deposited By:Physics
Deposited On:2011-08-09
Last Modified:2015-09-21

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