Interactions Between Coronal Mass Ejections

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 employ a
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.