@InProceedings{SilvaDSAMJSMMMDV:2018:RaBeEl,
author = "Silva, Marlos Rockenbach da and Deggeroni, Vin{\'{\i}}cius and
Silva, Ligia Alves da and Alves, Livia Ribeiro and Moura, Vitor
and Jauer, Paulo Ricardo and Silveira, Marcos Vin{\'{\i}}cius da
and Medeiros, Cl{\'a}udia and Marchezi, Jos{\'e} Paulo and
Mendes J{\'u}nior, Odim and Dal Lago, Alisson and Vieira,
Lu{\'{\i}}s Eduardo Antunes",
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
{} 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 = "Radiation belt electron’s flux dropout during intense geomagnetic
storms",
year = "2018",
organization = "Cospar Scientific Assembly, 42.",
abstract = "The solar structures that eventually reach the Earth, causing
intense geomagnetic storms, modify the geomagnetic field where the
electrons are trapped in the Van Allen radiation belts. The way in
which intense geomagnetic storms may affect the variability of the
relativistic electron fluxes in the radiation belts is not
completely understood, and here we address this point. We used
data from the Relativistic Electron-Proton Telescope (REPT)
instrument aboard NASAs twin Van Allen Probes. To identify and
quantize the intensity of storms we used the symmetric index,
SYM-H, and to identify the cause of the geomagnetic storms, we
used data from the solar wind: speed, dynamic pressure and
magnetic field as measured by the Advanced Composition Explorer
(ACE), and Deep Space Climate Observatory (DSCOVR) satellites,
which are orbiting the gravitational balance point between the Sun
and the Earth. The comparison of electron fluxes in the outer
radiation belts with Interplanetary Medium data showed the
importance of the interplanetary magnetic field (IMF) Bz component
(in Geocentric Solar Magnetospheric - GSM - coordinates) on the
trapped electron flux during the occurrence of geomagnetic storms.
Negative values of the IMF Bz component interconnect the
interplanetary and geomagnetic fields, allowing particles to
escape throughout the magnetosphere to the solar wind, causing
decreases in the electron flux in periods that coincide with
negative IMF Bz values. This suggests that the particles flux in
the radiation belts depends on the IMF Bz component the same way
it does for the occurrence of intense geomagnetic storms. It is
necessary a deeper investigation to understand the contribution of
the different mechanisms of the internal and external phenomena of
the Earths magnetosphere to fully understand and describe the
behavior of trapped particles.",
conference-location = "Pasadena, California",
conference-year = "14-22 July",
language = "en",
targetfile = "silva_radiation.pdf",
urlaccessdate = "26 abr. 2024"
}