Fig. 1
From: Direct observations of a surface eigenmode of the dayside magnetopause
Schematic of the magnetopause surface eigenmode in a box model. a Box model equilibrium featuring the magnetopause (black) separating the magnetosheath (red) and magnetosphere (dark blue arrows depict the geomagnetic field bounded by the northern and southern ionospheres coloured light blue). The directions of the field-aligned coordinate system in this model are also shown where R is radial, A azimuthal and F field-aligned. Subsequent panels depict n = 1 b and n = 2 c MSE. The midpoint of the phase is indicated as the black dot, which corresponds to the location of the MSE n = 1 antinode and n = 2 node. Expected MSE polarisations in different regions of the magnetosphere for the magnetopause standoff distance (grey dashed), radial velocity (green), radial (blue) and field-aligned (red) magnetic field components are shown on the right d, e
