  This study presents a recently developed two-way coupled
magnetosphere-ionosphere model named MagPIE that enables the investigation of
the impact of flux transfer events (FTEs) on the ionosphere. Our findings
highlight the prominent role of cusp-FTE reconnection in influencing the
ionosphere. The typical morphology of an FTE signal, represented by
field-aligned currents (FACs) on the ionosphere, is shown to exhibit a distinct
pattern characterized by an I-shaped patch surrounded by a U-shaped patch.
Furthermore, we demonstrate that the effects of FACs resulting from FTEs may
extend well into the region of closed field lines on the ionosphere. These FACs
are seen to exhibit a remarkable resemblance to discrete dayside auroral arcs,
providing further evidence that FTEs can be considered as a probable cause of
such phenomena. Additionally, FTEs generate vortex-like patterns of ionospheric
flow, which can manifest as either twin vortices or a combination of multiple
vortices, depending on the characteristics of the FACs producing them.
Furthermore, we present compelling evidence of morphological similarity between
the simulated ionospheric signatures obtained from the MagPIE model and an
observation made by the SWARM satellites. The agreement between our model and
observational data further strengthens the credibility of our model and opens
up new avenues to theoretically explore the complex ionospheric effects caused
by FTEs.
