On the Interaction of Galactic Cosmic Rays with Heliospheric Shocks During Forbush Decreases

  title={On the Interaction of Galactic Cosmic Rays with Heliospheric Shocks During Forbush Decreases},
  author={Anamarija Kirin and Bojan Vr{\vs}nak and Mateja Dumbovi{\'c} and Bernd Heber},
  journal={Solar Physics},
Forbush decreases (FDs) are depletions in the galactic cosmic ray (GCR) count rate that last typically for about a week and can be caused by coronal mass ejections (CMEs) or corotating interacting regions (CIRs). Fast CMEs that drive shocks cause large FDs that often show a two-step decrease where the first step is attributed to the shock/sheath region, while the second step is attributed to the closed magnetic structure. Since the difference in size of shock and sheath region is significant… 
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