High-rigidity Forbush decreases: due to CMEs or shocks?
High-rigidity Forbush decreases: due to CMEs or shocks?
Aims. We seek to identify the primary agents causing Forbush decreases (FDs) in high-rigidity cosmic rays observed from the Earth. In particular, we ask if these FDs are caused mainly by coronal mass ejections (CMEs) from the Sun that are directed towards the Earth, or by their associated shocks.