@InProceedings{JauerAPPVASS:2017:StMaFi,
author = "Jauer, Paulo Ricardo and Alves, Livia Ribeiro and Padilha,
Ant{\^o}nio Lopes and P{\'a}dua, Marcelo Banik de and Vitorello,
{\'{\I}}caro and Alves, Maria Virginia and Silva, Ligia Alves da
and Souza, Vitor Moura Cardoso e Silva",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais
(INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)}",
title = "Study of magnetic field spatial variations in the southern
hemisphere's low latitudes due to different interplanetary
structures using the 3-D MHD SWMF/BATSRUS model",
booktitle = "Proceedings...",
year = "2017",
organization = "AGU Fall Meeting",
abstract = "Interplanetary structures such as Coronal Mass Ejections (CME),
Shocks, Corotating Interaction Regions (CIR) and Magnetic Clouds
(MC) interfere directly on Space Weather conditions and can cause
severe and intense disturbances in the Earth's magnetic field as
measured in space and on the ground. During magnetically disturbed
periods characterized by world-wide, abrupt variations of the
geomagnetic field, large and intense current systems can be
induced and amplified within the Earth even at low latitudes. Such
current systems are known as geomagnetically induced currents
(GIC) and can cause damage to power transmission lines,
transformers and the degradation of pipelines. As part of an
effort to estimate GIC intensities throughout the low to
equatorial latitudes of the Brazilian territory, we used the 3-D
MHD SWMF/BATSRUS code to estimate spatial variations of the
geomagnetic field during periods when the magnetosphere is under
the influence of CME and MC structures. Specifically, we used the
CalcDeltaB tool (Rastatter et al., Space Weather, 2014) to provide
a proxy for the spatial variations of the geomagnetic field, with
a 1 minute cadence, at 31 virtual magnetometer stations located in
the proposed study region. The stations are spatially arranged in
a two-dimensional network with each station being 5 degrees apart
in latitude and longitude. In a preliminary analysis, we found
that prior to the arrival of each interplanetary structure, there
is no appreciable variation in the components of the geomagnetic
field between the virtual stations. However, when the
interplanetary structures reach the magnetosphere, each station
perceives the magnetic field variation differently, so that it is
not possible to use a single station to represent the magnetic
field perturbation throughout the Brazilian region. We discuss the
minimum number and spacing between stations to adequately detail
the geomagnetic field variations in this region.",
conference-location = "New Orleans",
conference-year = "11-15 Dec.",
language = "en",
targetfile = "jauer_study.pdf",
urlaccessdate = "11 maio 2024"
}