Abstract
On October 28th 2021 the Sun released a large Coronal Mass Ejection
(CME) in Earth’s direction. An X1.0 class solar flare and a rare ground
level enhancement (GLE) were observed, along with bright solar radio
bursts. Here we examine data from the near-Earth environment to
investigate the terrestrial response to this solar event, as a typical
example of Sun-Earth interactions. The CME arrival is tracked at
$\sim$1 AU from Wind radio observations and the
interplanetary magnetic field (IMF) and solar wind dynamic pressure by
\textit{in-situ} measurements of OMNI spacecraft.
Geomagnetic activity is studied with indices including SYM-H while the
auroral response is monitored by remote Wind radio measurements of
Auroral Kilometric Radiation (AKR) and SSUSI UV observations. We
quantify the timeline for solar wind-magnetosphere coupling via
exploration of the dayside reconnection rate and polar cap voltages and
address the visibility of AKR sources for a dayside radio observatory.