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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Equatorial and low-latitude positive ionospheric phases due to moderate geomagnetic storm during high solar activity in January 2013

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Author(s):
Ribeiro, B. A. G. [1] ; Fagundes, P. R. [1] ; Venkatesh, K. [2] ; Tardelli, A. [1] ; Pillat, V. G. [1] ; Seemala, G. K. [3]
Total Authors: 6
Affiliation:
[1] Univ Vale Paraiba UNIVAP, Lab Fis & Astron, Av Shishima Hifumi 2911, Sao Jose Dos Campos, SP - Brazil
[2] NARL, Gadanki - India
[3] Indian Inst Geomagnetism, New Panvel, Navi Mumbai - India
Total Affiliations: 3
Document type: Journal article
Source: Advances in Space Research; v. 64, n. 4, p. 995-1010, AUG 15 2019.
Web of Science Citations: 0
Abstract

The day-to-day variability of the equatorial and low-latitude ionosphere during quiet and disturbed periods is one of the ionospheric highlighted Space Weather research topics, particularly the ionospheric electrodynamics during geomagnetic storms. This study investigates the response of ionospheric F-region from the equatorial region to beyond the Equatorial Ionization Anomaly (EIA) crest during moderate geomagnetic storm (minimum Dst = -53 nT) that took place on January 17 to 18, 2013, during the high solar activity period of solar cycle 24. The Total Electron Content (TEC) obtained through a network of 82 dual frequency GPS receivers, spanning over an area of 30 degrees x 30 degrees in latitude and longitude are used. Also the F-layer virtual height (h'F) and critical frequency (foF2) observations from 3 ionosondes, in the South American sector are used. Specifically, these GPS-TEC receivers and ionosondes are used to investigate how the F-layer was disturbed by two positive ionospheric phases occurred during the aforementioned disturbed period. The first positive ionospheric phase was probably due to a travelling ionospheric disturbance (TID). When this TID reached the Brazilian coast at low-latitude, the EIA crest was in the growth phase and makes it challenging to separate the spatial-temporal evolution of both phenomena. The second positive ionospheric phase was caused by an anomalous nighttime equatorial positive ionospheric cloud travelling from the east sector towards the west sector. In addition, how the EIA was disturbed by these two positive ionospheric phases in the eastern and western Brazilian sectors is also investigated. (C) 2019 COSPAR. Published by Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 12/08445-9 - Study of day-to-day variability of the mesosphere, thermosphere and ionosphere at low latitude and equatorial region, during the solar cycle 24
Grantee:Paulo Roberto Fagundes
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 16/10495-5 - Study of ionosphere and thermosphere during extreme space weather conditions during the descending phase of solar cycle 24 (2015, 2016 and 2017)
Grantee:Brunno Augusto Gomes Ribeiro
Support Opportunities: Scholarships in Brazil - Doctorate