Title: Characterizing the ionospheric current pattern response to southward and northward IMF turnings with dynamical SuperMAG correlation networks,
Abstract: We characterize the response of the quiet time (no substorms or storms)
large-scale ionospheric transient equivalent currents to north-south and
south-north IMF turnings by using a dynamical network of ground-based
magnetometers. Canonical correlation between all pairs of SuperMAG magnetometer
stations in the Northern Hemisphere (magnetic latitude (MLAT) 50-82$^{\circ}$)
is used to establish the extent of near-simultaneous magnetic response between
regions of magnetic local time-MLAT. Parameters and maps that describe
spatial-temporal correlation are used to characterize the system and its
response to the turnings aggregated over several hundred events. We find that
regions that experience large increases in correlation post turning coincide
with typical locations of a two-cell convection system and are influenced by
the interplanetary magnetic field $\mathit{B}_{y}$. The time between the
turnings reaching the magnetopause and a network response is found to be
$\sim$8-10 min and correlation in the dayside occurs 2-8 min before that in the
nightside.