This project aims to study coronal mass ejections (CMEs) and their interplanetary counterparts (ICMEs) using observations from both ground-based cosmic ray detectors and coronagraphs. It is known that CMEs are one of the main sources of geomagnetic disturbances (Gosling et al. 1990, 1991), being a central role on space weather research. The combination of ground-based cosmic ray (muon) detectors allow us to determine the tridimensional distribution in the Earth vicinity, as well as its gradients (Okazaki et al. 2008). Preliminary studies indicate that comparing the gradient and density with theoretical models of cosmic ray distribution inside the interplanetary counterparts of CMEs, it is possible to determine geometry and orientation of the structure (Kuwabara et al. 2009). On the other hand, the magnetic cloud, as well as its correspondent solar structure, like a coronal mass ejection, can be studied thanks to use of coronagraphs, like LASCO (Large Angle and Spectroscopic Coronagraph), onboard the SOHO spacecraft and the heliospheric imagers SECCHI (Sun Earth Connection and Heliospheric Investigator), onboard the STEREO twin spacecrafts. Using these instruments it is possible to reconstruct its tridimensional structure. The current project aims to a better understanding of interplanetary structures, since the solar corona up to the Earth's vicinity.
News published in Agência FAPESP Newsletter about the scholarship: