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A close examination of the ULF waves in relation with plasmaspheric plumes is motivated by the
central role played by both of them in the global magnetospheric dynamics. Plasmaspheric plumes
dramatically alter the distribution of plasma density and temperature inside the magnetosphere,
which has a direct effect on the propagation and the excitation or damping of these waves. On the
nightside, the ULF waves have a key contribution to M–I coupling, both on large scale, associated
with the various substorm stages (in particular the substorm onset), and on meso-scale, associated
with BBFs. The BBFs'coupling to the ionosphere is a topic of active research [e.g. Wolf et al.,
2012], and the project ERODIUM is very likely to contribute to this research.
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