eCite Digital Repository

Precursor signatures of the storm sudden commencement in 2008


Braga, CR and Dal Lago, A and Rockenbach, M and Schuch, NJ and Vieira, LR and Munakata, K and Kato, C and Kuwabara, T and Evenson, PA and Bieber, JW and Tokumaru, M and Duldig, ML and Humble, JE and Sabbah, IS and Al Jassar, HK and Sharma, MM, Precursor signatures of the storm sudden commencement in 2008, Proceedings of the 32nd International Cosmic Ray Conference, 11-18 August 2011, Beijing, China, pp. 286-289. ISBN 9781634391382 (2011) [Refereed Conference Paper]

PDF (Braga et. al. 32nd International Cosmic Ray Conference, Beijing, 2011, Vol 10, 286-289)
Restricted - Request a copy

Copyright Statement

Copyright unknown

Official URL:

DOI: doi:10.7529/ICRC2011/V10/0717


Plasma structures ejected from solar eruptions travel in interplanetary space with speed of hundreds of kilometers per second and may hit the Earth. Signatures preceding the arrival of such plasma structures can be detected in the high-energy cosmic ray intensity observed with four multidirectional muon telescopes in the Global Muon Detector Network (GMDN) on the Earth. A typical signature is a "loss cone" effect which is observed as a systematic intensity decrease of cosmic rays with small pitch angles measured from the sunward interplanetary magnetic field direction. Corrections for the atmospheric pressure and temperature effects are applied to the muon data before examining the pitch angle distributions in the two-days-period preceding a moderate geomagnetic storms observed in November 24th 2008. The contribution of the first order anisotropy, which is not of primary interest when searching for the "loss cone" effect, is also subtracted from the observed intensity.

Item Details

Item Type:Refereed Conference Paper
Keywords:geomagnetic storms, muon detectors, solar related phenomena
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:117075
Year Published:2011
Deposited By:Mathematics and Physics
Deposited On:2017-05-30
Last Modified:2017-11-03

Repository Staff Only: item control page