@InProceedings{MarcheziKeGoMuPiSiHa:2023:EfSoWi,
author = "Marchezi, Jos{\'e} Paulo and Keese, Amy M. and Goughlan, Michael
and Mukudan, Raman and Pinto, Victor A. and Silva, Ligia Alves da
and Hampton, Donald",
affiliation = "{University of New Hampshire Main Campus} and {University of New
Hampshire} and {University of New Hampshire} and {University of
New Hampshire} and {Universidad de Santiago de Chile} and
{Instituto Nacional de Pesquisas Espaciais (INPE)} and {University
of Alaska Fairbanks}",
title = "On the effects of the solar wind structures in the global
distribution of ground-based geomagnetic perturbations during
geomagnetic storms",
booktitle = "Proceedings...",
year = "2023",
organization = "AGU FAll Meeting",
publisher = "AGU",
abstract = "Changes in the solar wind flow, generally linked to interplanetary
coronal mass ejections (ICME) or high-speed streams (HSS), are
directly related to the space environment near Earth. The impact
of these structures on the Earths magnetosphere perturbs the
geomagnetic field. Variable geomagnetic fields give rise to
measurable effects in the magnetosphere, the ionosphere, the upper
atmosphere, and on the ground. Rapid changes in the geomagnetic
field can lead to the generation of geomagnetically induced
currents (GICs). Intense GICs can have adverse effects on
technology systems, leading to power outages and damage to power
grid components as well as impacting pipelines and train systems.
The goal of this work is to evaluate how the characteristics of
different solar wind structures (ICME and HSS) correlate with the
magnetic field perturbation (dB/dt) occurrence, intensity, and
location. We selected storm events based on the Sym-H index less
than or equal to -50 nT. A total of 534 events were selected, 263
related to ICME and 271 to HSS. To capture the variations in a
broad range of latitudes, the thresholds of dB/dt were defined as
200, 300, 400, and 500 nT/min in stations at geographic latitudes
varying from +- 30 to +-90 degrees. The asymmetry in the
distribution of dB/dt spikes according to MLT, discussed in
previous work, is observed. We also observe differences in the
preferential location of dB/dt with respect to storms related to
HSS and ICME. Our investigation seeks to evaluate the relationship
between ground level dB/dt variation and solar wind parameters
including mesoscale structures of solar wind events and the
periodicity of solar wind velocity and magnetic field variations.
This analysis will enhance our understanding of these mechanisms
and aid in the incorporation of solar wind parameters to machine
learning models to improve the accuracy of forecasts of dB/dt
recorded on the ground.",
conference-location = "San Francisco, CA",
conference-year = "11-15 Dec. 2023",
language = "en",
urlaccessdate = "29 jun. 2024"
}