Analysis of Ionospheric and Geomagnetic Response to the 2020 Patagonian Solar Eclipse

Autores
Meza, Amalia Margarita; Eylenstein, Bernardo; Natali, María Paula; Bosch, Guillermo Luis; Moirano, Juan Francisco; Chalar, Elfriede
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Total solar eclipses are unique opportunities to study how the ionospheric and external geomagnetic field responds to fast changes in the ionizing flux as the moon’s shadow travels through its path over the ionosphere at an average speed of 3,000 km/h. In this contribution, we describe our observing campaign in which we set up GNSS and geomagnetic stations at the city of Valcheta, Río Negro, Argentina (which was located right under the path of totality). We also describe the results obtained from the analysis of the combination of on-site data together with publicly available observations from geodetic and geomagnetic observatories. The large span in latitude of our data allowed us to analyze the different magnitudes of the drop in vertical total electron content (ΔVTEC) with varying occultation percentages. We found an expected reduction in this drop as we move away from totality path but we also detected a new increment in ΔVTEC as we got closer to Earth’s Magnetic Equator. We also compared our observations of the geomagnetic field variations with predictions that were based on the Ashour-Chapman model and we find an overall good agreement, although a ≈20 min delay with the eclipse maximum is evident beyond observing uncertainties. This suggests the presence of processes that delay the response of the lower ionosphere to the loss of the photoionization flux.
Laboratorio de Meteorología espacial, Atmósfera terrestre, Geodesia, Geodinámica, diseño de Instrumental y Astrometría
Instituto de Astrofísica de La Plata
Materia
Astronomía
Física
Solar eclipses
Earth ionosphere
F-layer
E-layer
Geomagnetic fields
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/130018

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network_name_str SEDICI (UNLP)
spelling Analysis of Ionospheric and Geomagnetic Response to the 2020 Patagonian Solar EclipseMeza, Amalia MargaritaEylenstein, BernardoNatali, María PaulaBosch, Guillermo LuisMoirano, Juan FranciscoChalar, ElfriedeAstronomíaFísicaSolar eclipsesEarth ionosphereF-layerE-layerGeomagnetic fieldsTotal solar eclipses are unique opportunities to study how the ionospheric and external geomagnetic field responds to fast changes in the ionizing flux as the moon’s shadow travels through its path over the ionosphere at an average speed of 3,000 km/h. In this contribution, we describe our observing campaign in which we set up GNSS and geomagnetic stations at the city of Valcheta, Río Negro, Argentina (which was located right under the path of totality). We also describe the results obtained from the analysis of the combination of on-site data together with publicly available observations from geodetic and geomagnetic observatories. The large span in latitude of our data allowed us to analyze the different magnitudes of the drop in vertical total electron content (ΔVTEC) with varying occultation percentages. We found an expected reduction in this drop as we move away from totality path but we also detected a new increment in ΔVTEC as we got closer to Earth’s Magnetic Equator. We also compared our observations of the geomagnetic field variations with predictions that were based on the Ashour-Chapman model and we find an overall good agreement, although a ≈20 min delay with the eclipse maximum is evident beyond observing uncertainties. This suggests the presence of processes that delay the response of the lower ionosphere to the loss of the photoionization flux.Laboratorio de Meteorología espacial, Atmósfera terrestre, Geodesia, Geodinámica, diseño de Instrumental y AstrometríaInstituto de Astrofísica de La Plata2021info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/130018enginfo:eu-repo/semantics/altIdentifier/issn/2296-987Xinfo:eu-repo/semantics/altIdentifier/doi/10.3389/fspas.2021.766327info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:32:41Zoai:sedici.unlp.edu.ar:10915/130018Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:32:42.153SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Analysis of Ionospheric and Geomagnetic Response to the 2020 Patagonian Solar Eclipse
title Analysis of Ionospheric and Geomagnetic Response to the 2020 Patagonian Solar Eclipse
spellingShingle Analysis of Ionospheric and Geomagnetic Response to the 2020 Patagonian Solar Eclipse
Meza, Amalia Margarita
Astronomía
Física
Solar eclipses
Earth ionosphere
F-layer
E-layer
Geomagnetic fields
title_short Analysis of Ionospheric and Geomagnetic Response to the 2020 Patagonian Solar Eclipse
title_full Analysis of Ionospheric and Geomagnetic Response to the 2020 Patagonian Solar Eclipse
title_fullStr Analysis of Ionospheric and Geomagnetic Response to the 2020 Patagonian Solar Eclipse
title_full_unstemmed Analysis of Ionospheric and Geomagnetic Response to the 2020 Patagonian Solar Eclipse
title_sort Analysis of Ionospheric and Geomagnetic Response to the 2020 Patagonian Solar Eclipse
dc.creator.none.fl_str_mv Meza, Amalia Margarita
Eylenstein, Bernardo
Natali, María Paula
Bosch, Guillermo Luis
Moirano, Juan Francisco
Chalar, Elfriede
author Meza, Amalia Margarita
author_facet Meza, Amalia Margarita
Eylenstein, Bernardo
Natali, María Paula
Bosch, Guillermo Luis
Moirano, Juan Francisco
Chalar, Elfriede
author_role author
author2 Eylenstein, Bernardo
Natali, María Paula
Bosch, Guillermo Luis
Moirano, Juan Francisco
Chalar, Elfriede
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Astronomía
Física
Solar eclipses
Earth ionosphere
F-layer
E-layer
Geomagnetic fields
topic Astronomía
Física
Solar eclipses
Earth ionosphere
F-layer
E-layer
Geomagnetic fields
dc.description.none.fl_txt_mv Total solar eclipses are unique opportunities to study how the ionospheric and external geomagnetic field responds to fast changes in the ionizing flux as the moon’s shadow travels through its path over the ionosphere at an average speed of 3,000 km/h. In this contribution, we describe our observing campaign in which we set up GNSS and geomagnetic stations at the city of Valcheta, Río Negro, Argentina (which was located right under the path of totality). We also describe the results obtained from the analysis of the combination of on-site data together with publicly available observations from geodetic and geomagnetic observatories. The large span in latitude of our data allowed us to analyze the different magnitudes of the drop in vertical total electron content (ΔVTEC) with varying occultation percentages. We found an expected reduction in this drop as we move away from totality path but we also detected a new increment in ΔVTEC as we got closer to Earth’s Magnetic Equator. We also compared our observations of the geomagnetic field variations with predictions that were based on the Ashour-Chapman model and we find an overall good agreement, although a ≈20 min delay with the eclipse maximum is evident beyond observing uncertainties. This suggests the presence of processes that delay the response of the lower ionosphere to the loss of the photoionization flux.
Laboratorio de Meteorología espacial, Atmósfera terrestre, Geodesia, Geodinámica, diseño de Instrumental y Astrometría
Instituto de Astrofísica de La Plata
description Total solar eclipses are unique opportunities to study how the ionospheric and external geomagnetic field responds to fast changes in the ionizing flux as the moon’s shadow travels through its path over the ionosphere at an average speed of 3,000 km/h. In this contribution, we describe our observing campaign in which we set up GNSS and geomagnetic stations at the city of Valcheta, Río Negro, Argentina (which was located right under the path of totality). We also describe the results obtained from the analysis of the combination of on-site data together with publicly available observations from geodetic and geomagnetic observatories. The large span in latitude of our data allowed us to analyze the different magnitudes of the drop in vertical total electron content (ΔVTEC) with varying occultation percentages. We found an expected reduction in this drop as we move away from totality path but we also detected a new increment in ΔVTEC as we got closer to Earth’s Magnetic Equator. We also compared our observations of the geomagnetic field variations with predictions that were based on the Ashour-Chapman model and we find an overall good agreement, although a ≈20 min delay with the eclipse maximum is evident beyond observing uncertainties. This suggests the presence of processes that delay the response of the lower ionosphere to the loss of the photoionization flux.
publishDate 2021
dc.date.none.fl_str_mv 2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/130018
url http://sedici.unlp.edu.ar/handle/10915/130018
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/2296-987X
info:eu-repo/semantics/altIdentifier/doi/10.3389/fspas.2021.766327
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
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instname_str Universidad Nacional de La Plata
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repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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