Abstract
We explore the characteristics of EMIC waves generated in a non-dipole,
compressed magnetic field at the minimum of the magnetic field. We
conducted 2D full-wave simulations using the Petra-M code, focusing on a
compressed dipole magnetic field line in the outer dayside magnetosphere
for a range of L values ($L=8-10$). By comparing the simulation
results with MMS observations, we aim to understand how the observed
wave characteristics are affected by a shifting source region across
different L-shells. Our findings indicate that the direction of the
Poynting vector systematically changes depending on the local source
location of the wave, which is consistent with the observations. EMIC
waves propagate along the magnetic field line and reach both the
northern and southern hemispheres; however, there is a notable
difference in the power of EMIC waves between the two hemispheres,
indicating seasonal asymmetries in their occurrence.