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1. Identificação
Tipo de ReferênciaArtigo em Evento (Conference Proceedings)
Sitemtc-m21c.sid.inpe.br
Código do Detentorisadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S
Identificador8JMKD3MGP3W34R/3QTQTG5
Repositóriosid.inpe.br/mtc-m21c/2018/04.18.16.35
Repositório de Metadadossid.inpe.br/mtc-m21c/2018/04.18.16.35.46
Última Atualização dos Metadados2020:12.07.21.11.31 (UTC) administrator
Chave SecundáriaINPE--PRE/
Chave de CitaçãoEspinosaSarmientoPadiSilv:2018:EsAmGe
TítuloEstimate of the amplitude of geomagnetically induced currents (gic) at different places in brazil duringmagnetic storms occurred in the year 2015
Ano2018
Data de Acesso10 maio 2024
Tipo SecundárioPRE CI
2. Contextualização
Autor1 Espinosa Sarmiento, Karen Viviana
2 Padilha, Antônio Lopes
3 Silva, Ligia Alves da
Identificador de Curriculo1
2 8JMKD3MGP5W/3C9JGJG
Grupo1 GES-CEA-SESPG-INPE-MCTIC-GOV-BR
2 DIDGE-CGCEA-INPE-MCTIC-GOV-BR
3 DIDGE-CGCEA-INPE-MCTIC-GOV-BR
Afiliação1 Instituto Nacional de Pesquisas Espaciais (INPE)
2 Instituto Nacional de Pesquisas Espaciais (INPE)
3 Instituto Nacional de Pesquisas Espaciais (INPE)
Endereço de e-Mail do Autor1 karen.sarmiento@inpe.br
2 antonio.padilha@inpe.br
3 ligia.silva@inpe.br
Nome do EventoLatin American Conference on Space Geophysics, 11 (COLAGE)
Localização do EventoBuenos Aires, Argentina
Data16-20 abr.
Histórico (UTC)2018-04-18 16:35:55 :: simone -> simone] :: 2018
2018-04-18 16:35:55 :: simone] -> administrator :: 2018
2019-01-04 16:57:04 :: administrator -> simone :: 2018
2019-01-07 13:57:54 :: simone -> administrator :: 2018
2020-12-07 21:11:31 :: administrator -> simone :: 2018
3. Conteúdo e estrutura
É a matriz ou uma cópia?é a matriz
Estágio do Conteúdoconcluido
Transferível1
Tipo do ConteúdoExternal Contribution
ResumoGeomagnetic induced currents (GIC) detected on the Earths surface are related to extreme solar events and may represent a signicant danger to technological systems installed both in space and in the ground. Its eects are relatively well studied in auroral and midlatitude regions, but there are still few studies in low latitudes and near the magnetic equator. To evaluate its eects in the low latitude region of South America and thus contribute to the development of new mechanisms that may help to minimize its possible impact, the intensity of the GIC in four locations in the Brazilian territory is here evaluated during four geomagnetic storms that occurred during the year 2015. Geomagnetic eld variation data recorded by uxgate magnetometers of the Brazilian Space Weather program at INPE (EMBRACE) are available during these storms. Using information from the electrical conductivity distribution below each magnetic station, geoelectric eld variations were derived for the period of the magnetic storms. Subsequently, GIC values were estimated using the Lehtinen-Pirjola (LP) engineering model and available information from a 500 kV transmission grid located in Central Brazil (around the Furnas substation node in Itumbiara, State of Goias ). After validating the numerical calculations comparing with the GIC data measured at this substation, the electric power transmission grid at Itumbiara was hypothetically shifted to the stations where measurements of the geomagnetic eld are available. The maximum GIC amplitude estimated by the LP model was about 8A during the main phase of a magnetic storm on June 21 (Dst = -204 nT) at a station in the center-west Brazil. Although this station is aected by the diurnal currents of the equatorial electrojet, the comparison with the other storms showed that, besides the large dH/dt of this storm, the main responsible for the GIC is the high resistivity of the rocks below this station.
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5. Fontes relacionadas
Unidades Imediatamente Superiores8JMKD3MGPCW/3EU29DP
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Acervo Hospedeirourlib.net/www/2017/11.22.19.04
6. Notas
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