Authors: Sanchita Pal (Heliophysics Science Division, NASA Goddard Space Flight Center, Greenbelt, MD, United States, Department of Physics and Astronomy, George Mason University, Fairfax, VA, United States) Laura Balmaceda (Heliophysics Science Division, NASA Goddard Space Flight Center, Greenbelt, MD, United States, Department of Physics and Astronomy, George Mason University, Fairfax, VA, United States) Andreas J. Weiss (NASA Postdoctoral Program Fellow, NASA Goddard Space Flight Center, Greenbelt, MD, United States) Teresa Nieves-Chinchilla (Heliophysics Science Division, NASA Goddard Space Flight Center, Greenbelt, MD, United States), Fernando Carcaboso (Heliophysics Science Division, NASA Goddard Space Flight Center, Greenbelt, MD, United States, Department of Physics, The Catholic University of America, Washington, DC, United States), Emilia Kilpua (Department of Physics, University of Helsinki, Helsinki, Finland) and Christian Möstl (Austrian Space Weather Office, GeoSphere Austria, Graz, Austria)

Probing the complexity of the structured heliosphere with multi-point in situ and imaging observations by using a fleet of spacecraft has revealed many unknown facts on the dynamics of large-scale structures in the heliosphere. In this paper, we investigate a complex-structured heliosphere by analyzing the Sun, solar corona, and solar wind with remote and in situ observations aided by heliospheric modeling. We identified multiple flux ropes (FRs) associated with large expulsions of magnetized plasma-coronal mass ejections, from the same solar source in a three-day interval, an interplanetary wave shock, and a sheath in front of the FRs. In situ observations displayed a stream interaction region behind FRs formed due to the overtaking of different-speed solar winds. This high-speed stream originated from a coronal hole located southeast of the coronal mass ejection solar source. We find evidence of merging FRs, FR deflection due to the presence of the nearby coronal hole, and FR’s unalike structural appearance at distant multi-point observations obtained at 1 au. This complex-structured heliosphere resulted in multiple G1-class geomagnetic storms when interacting with Earth’s magnetosphere. Thus, the study focuses on the reconstruction of the structured heliosphere based on observations and modeling. It highlights the importance of multi-point observations in understanding the global configuration and disparity in the local nature of a structured heliosphere.