Ionospheric GPS-TEC responses from equatorial region to the EIA crest in the South American sector under intense space weather conditions

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dc.contributor.authorde Abreu A.J.
dc.contributor.authorCorreia E.
dc.contributor.authorDenardini C.M.
dc.contributor.authorde Jesus R.
dc.contributor.authorVenkatesh K.
dc.contributor.authorRoberto M.
dc.contributor.authorAbalde J.R.
dc.contributor.authorFagundes P.R.
dc.contributor.authorBolzan M.J.A.
dc.contributor.authorGende M.
dc.date.accessioned2024-03-12T19:17:54Z
dc.date.available2024-03-12T19:17:54Z
dc.date.issued2022
dc.description.abstract© 2021 Elsevier LtdWe present and discuss the ionospheric F-region observations from equator to the equatorial ionization anomaly (EIA) regions over the South American sector during an intense space weather event occurred between 27 and May 29, 2017. During this geomagnetic storm, the symmetric-H (SYM-H) reached a minimum of −142 nT at ∼0700 UT on May 28, 2017. For this investigation, we analyze the vertical total electron content (VTEC) observations from a chain of nearly 120 Global Positioning System (GPS) stations. Magnetometer measurements obtained at two stations in the low latitude regions are also presented. The observations do not indicate prompt penetration electric field (PPEF) effects in the VTEC variations. Magnetometer's observations over Cuiabá (CBA) and Cachoeira Paulista (CXP) in central west and south parts of Brazil, respectively, have shown a strong cross-correlation with SYM-H in the period between 3 and 48 h. The results also show positive ionospheric storm phase during the recovery phase on May 28, 2017. Positive effect during the recovery phase of the geomagnetic storm is possibly associated with effects of disturbances winds. During the recovery phase, a strong intensification of the EIA took place, possibly related to an additional ionization effect. The VTEC values show differences between the west and east sectors. This indicates that the EIA crest is stronger in the east sector than in the west sector, possibly due to the combination of disturbance wind effects and geomagnetic field geometry where in the east sector the field lines are more inclined.
dc.description.volume227
dc.identifier.doi10.1016/j.jastp.2021.105801
dc.identifier.issn1364-6826
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/34523
dc.relation.ispartofJournal of Atmospheric and Solar-Terrestrial Physics
dc.rightsAcesso Aberto
dc.subject.otherlanguageEIA
dc.subject.otherlanguageGeomagnetic storm
dc.subject.otherlanguageGPS
dc.subject.otherlanguageIonosphere
dc.titleIonospheric GPS-TEC responses from equatorial region to the EIA crest in the South American sector under intense space weather conditions
dc.typeArtigo
local.scopus.citations0
local.scopus.eid2-s2.0-85119653827
local.scopus.subjectEquatorial ionization anomaly
local.scopus.subjectEquatorial regions
local.scopus.subjectGeomagnetic storm
local.scopus.subjectLow latitudes
local.scopus.subjectPrompt penetration
local.scopus.subjectRecovery phase
local.scopus.subjectSpace weather
local.scopus.subjectSymmetrics
local.scopus.subjectVertical total electron contents
local.scopus.subjectWeather events
local.scopus.updated2024-12-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85119653827&origin=inward
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