AbstractCase study is presented for three Forbush decreases in 2004–2005, using cosmic ray data from ground-based detectors – neutron monitors and a muon detector. One of them was a typical event (September 2005), while two other were quite unusual (November 2004 and January 2005). Two unusual features, not expected from the standard theory, are revealed: (1) the recovery time of a Forbush decrease can strongly depend on the energy; (2) an over-recovery is observed in the most energetic cosmic ray data (muon detector). A simple scenario is suggested for the observed phenomenon.


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    Title :

    Case study of Forbush decreases: Energy dependence of the recovery


    Contributors:
    Jämsén, T. (author) / Usoskin, I.G. (author) / Räihä, T. (author) / Sarkamo, J. (author) / Kovaltsov, G.A. (author)

    Published in:

    Advances in Space Research ; 40 , 3 ; 342-347


    Publication date :

    2007-02-08


    Size :

    6 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





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