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

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...

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Autores principales:	Amalia Meza, Bernardo Eylenstein, María Paula Natali, Guillermo Bosch, Juan Moirano, Elfriede Chalar
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	solar eclipses earth ionosphere F-layer E-layer geomagnetic fields Astronomy QB1-991 Geophysics. Cosmic physics QC801-809
Acceso en línea:	https://doaj.org/article/8a3f02b03c3a484aa7252539365f8b65
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spelling	oai:doaj.org-article:8a3f02b03c3a484aa7252539365f8b652021-12-03T07:01:22ZAnalysis of Ionospheric and Geomagnetic Response to the 2020 Patagonian Solar Eclipse2296-987X10.3389/fspas.2021.766327https://doaj.org/article/8a3f02b03c3a484aa7252539365f8b652021-12-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fspas.2021.766327/fullhttps://doaj.org/toc/2296-987XTotal 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.Amalia MezaAmalia MezaBernardo EylensteinBernardo EylensteinMaría Paula NataliMaría Paula NataliGuillermo BoschJuan MoiranoElfriede ChalarFrontiers Media S.A.articlesolar eclipsesearth ionosphereF-layerE-layergeomagnetic fieldsAstronomyQB1-991Geophysics. Cosmic physicsQC801-809ENFrontiers in Astronomy and Space Sciences, Vol 8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	solar eclipses earth ionosphere F-layer E-layer geomagnetic fields Astronomy QB1-991 Geophysics. Cosmic physics QC801-809
spellingShingle	solar eclipses earth ionosphere F-layer E-layer geomagnetic fields Astronomy QB1-991 Geophysics. Cosmic physics QC801-809 Amalia Meza Amalia Meza Bernardo Eylenstein Bernardo Eylenstein María Paula Natali María Paula Natali Guillermo Bosch Juan Moirano Elfriede Chalar Analysis of Ionospheric and Geomagnetic Response to the 2020 Patagonian Solar Eclipse
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.
format	article
author	Amalia Meza Amalia Meza Bernardo Eylenstein Bernardo Eylenstein María Paula Natali María Paula Natali Guillermo Bosch Juan Moirano Elfriede Chalar
author_facet	Amalia Meza Amalia Meza Bernardo Eylenstein Bernardo Eylenstein María Paula Natali María Paula Natali Guillermo Bosch Juan Moirano Elfriede Chalar
author_sort	Amalia Meza
title	Analysis of Ionospheric and Geomagnetic Response to the 2020 Patagonian Solar Eclipse
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
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/8a3f02b03c3a484aa7252539365f8b65
work_keys_str_mv	AT amaliameza analysisofionosphericandgeomagneticresponsetothe2020patagoniansolareclipse AT amaliameza analysisofionosphericandgeomagneticresponsetothe2020patagoniansolareclipse AT bernardoeylenstein analysisofionosphericandgeomagneticresponsetothe2020patagoniansolareclipse AT bernardoeylenstein analysisofionosphericandgeomagneticresponsetothe2020patagoniansolareclipse AT mariapaulanatali analysisofionosphericandgeomagneticresponsetothe2020patagoniansolareclipse AT mariapaulanatali analysisofionosphericandgeomagneticresponsetothe2020patagoniansolareclipse AT guillermobosch analysisofionosphericandgeomagneticresponsetothe2020patagoniansolareclipse AT juanmoirano analysisofionosphericandgeomagneticresponsetothe2020patagoniansolareclipse AT elfriedechalar analysisofionosphericandgeomagneticresponsetothe2020patagoniansolareclipse
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Analysis of Ionospheric and Geomagnetic Response to the 2020 Patagonian Solar Eclipse

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