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Linear dependence of the postsunset equatorial anomaly electron density on solar flux and its relation to the maximum prereversal E x B drift velocity through its dependence on solar flux
(American Geophysical Union, 2004-07-30)
The postsunset equatorial ionization anomaly, with maximum F layer electron density, Nemax, occurring near 2100 LT, has been found during solar maximum to be a linear function of the maximum prereversal E × B drift velocity ...
Swarm SCARF equatorial electric field inversion chain
(SpringerOpen, 2013-11-22)
The day-time eastward equatorial electric field (EEF) in the ionospheric E-region plays a crucial role in equatorial ionospheric dynamics. It is responsible for driving the equatorial electrojet (EEJ) current system, ...
Effects on the equatorial and low latitude thermosphere and ionosphere during the 19-22 December 2015 geomagnetic storm period
(Elsevier, 2020-05)
In this paper, the critical frequency of F2 layer (foF2) and their peak height (hmF2) recorded at equatorial and low latitude stations of the South American sector were analyzed during the 19–22 December 2015 geomagnetic ...
Quasi-biennial oscillation in foF2 at the south crest of the equatorial anomaly
(Elsevier, 2009-12)
The aim of this paper is to report some periodicities observed in the ionospheric parameter foF2 measured at Tucuman (26.9°S; 65.4°W), station placed near the southern crest of the equatorial anomaly. For that, monthly ...
Unusual early morning development of the equatorial anomaly in the Brazilian sector during the Halloween magnetic storm
(Amer Geophysical Union, 2006-05-24)
The solar events that occurred at the end of October 2003 gave rise to very strong geomagnetic disturbances that peaked twice with Dst values reaching -345 nT around 0000 UT on 30 October and -400 nT around 2300 UT, on the ...
Unusual early morning development of the equatorial anomaly in the Brazilian sector during the Halloween magnetic storm
(Amer Geophysical Union, 2006-05-24)
The solar events that occurred at the end of October 2003 gave rise to very strong geomagnetic disturbances that peaked twice with Dst values reaching -345 nT around 0000 UT on 30 October and -400 nT around 2300 UT, on the ...
Ionospheric anomalies preceding the low-latitude earthquake that occurred on April 16, 2016 in Ecuador
(Elsevier Ltd, 2019-01)
A catastrophic seismic event of M w 7.8 occurred on April 16, 2016 in Ecuador. As with some other major earthquakes, many human lives were lost. Thus in the last two decades, the search for seismo-ionospheric signatures ...
Ionospheric anomalies preceding the low-latitude earthquake that occurred on April 16, 2016 in Ecuador
(Elsevier Ltd, 2019-01)
A catastrophic seismic event of M w 7.8 occurred on April 16, 2016 in Ecuador. As with some other major earthquakes, many human lives were lost. Thus in the last two decades, the search for seismo-ionospheric signatures ...
Longitudinal and seasonal structure of the ionospheric equatorial electric field
(American Geophysical Union, 2013-03-28)
The daytime eastward equatorial electric field (EEF) in the ionospheric E‐region plays an important role in equatorial ionospheric dynamics. It is responsible for driving the equatorial electrojet (EEJ) current system, ...
A New Method for Ionospheric Tomography and Its Assessment by Ionosonde Electron Density, GPS TEC, and Single-Frequency PPP
(Ieee-inst Electrical Electronics Engineers Inc, 2019-05-01)
A new tomographic method was developed with the main goal of mapping the ionosphere in the region of Brazil. The ionospheric background was estimated based on ionosonde and radio-occultation measurements to overcome the ...