SH044-0018
Interactions Between Coronal Mass Ejections

Tuesday, 15 December 2020
Poster
Mary Eby1,2, Tatiana Niembro Hernandez3,4, Kristoff W Paulson2,4, Stephanie Colon5,6, Michael Louis Stevens4, Linda F Wilson7, Anthony W Case2,4 and Kelly E Korreck2,4, (1)Texas Lutheran University, Seguin, TX, United States, (2)Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States, (3)Harvard-Smithsonian Center for Astrophysics, Cambridge, United States, (4)Smithsonian Astrophysical Observatory, Cambridge, MA, United States, (5)University of Puerto Rico Rio Piedras Campus, San Juan, PR, United States, (6)Center for Astrophysics | Harvard-Smithsonian, Cambridge, United States, (7)Texas Lutheran University, Seguin, United States
Abstract:
Coronal Mass Ejections (CMEs), when aimed towards Earth, can cause geomagnetic storms which lead to a host of problems, including interference with radio communication, widespread blackouts, and endangering astronauts. We investigate the idea that the strongest CMEs may not leave the Sun alone, and that CMEs which interact before reaching Earth can cause more devastating geomagnetic storms. We use both in-situ data and remote data from the Wind and SOHO spacecraft, respectively, to identify potential interacting CMEs. Next, we predict the location and time of this interaction using an analytic model, and employ a 2D hydrodynamical numerical model to compare the speed and density profiles to those measured by Wind spacecraft. Then, we analyze the complexity of their structures using a wavelet transformation method. Finally, we present a list of these various structures to perform further analysis.
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