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A study on the response of the Equatorial Ionization Anomaly over the East Africa sector during the geomagnetic storm of November 13, 2012

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A study on the response of the Equatorial Ionization Anomaly over the East Africa sector during the geomagnetic storm of November 13, 2012. / Olwendo, Joseph; Yamazaki (YY), Yosuke; Cilliers, Pierre; Baki, Paul; Ngwira, Chigomezyo; Mito, Collins.

In: Advances in Space Research, Vol. 55, No. 12, 15.06.2015, p. 2863-2872.

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Olwendo, Joseph ; Yamazaki (YY), Yosuke ; Cilliers, Pierre ; Baki, Paul ; Ngwira, Chigomezyo ; Mito, Collins. / A study on the response of the Equatorial Ionization Anomaly over the East Africa sector during the geomagnetic storm of November 13, 2012. In: Advances in Space Research. 2015 ; Vol. 55, No. 12. pp. 2863-2872.

Bibtex

@article{a4b0c39e6b2a464dabfa4fa88fd83185,
title = "A study on the response of the Equatorial Ionization Anomaly over the East Africa sector during the geomagnetic storm of November 13, 2012",
abstract = "Using a set of up to 12 International GNSS Services (IGS) receivers around the East African region, we present the formation of the peak of ionospheric Equatorial Ionization Anomaly during the geomagnetic storm of 13th November 2012. The diurnal pattern of total electron content (TEC) shows a strong negative storm during the main phase of the storm. Latitudinal variation of TEC shows development of strong Equatorial Ionization Anomaly (EIA) on the recovery phase. Evidence in terms of magnetic variations during the storm period, indicates that the penetration of interplanetary electric fields is the main cause of the negative ionospheric effect during the main phase of the storm. Observation shows the occurrence of very strong westward electric fields arising from the IMF Bz turning southward a few hours after sunset local time. TEC enhancement during the recovery phase on the 16th are attributed to the increased ionospheric disturbance dynamo electric fields. In addition the EIA crest was found to intensify in amplitude as well as expand in latitudinal extent.",
keywords = "IGS, Ionospheric ionization anomaly, East African region, Geomagnetic storm",
author = "Joseph Olwendo and {Yamazaki (YY)}, Yosuke and Pierre Cilliers and Paul Baki and Chigomezyo Ngwira and Collins Mito",
year = "2015",
month = jun
day = "15",
doi = "10.1016/j.asr.2015.03.011",
language = "English",
volume = "55",
pages = "2863--2872",
journal = "Advances in Space Research",
issn = "0273-1177",
publisher = "Elsevier Ltd",
number = "12",

}

RIS

TY - JOUR

T1 - A study on the response of the Equatorial Ionization Anomaly over the East Africa sector during the geomagnetic storm of November 13, 2012

AU - Olwendo, Joseph

AU - Yamazaki (YY), Yosuke

AU - Cilliers, Pierre

AU - Baki, Paul

AU - Ngwira, Chigomezyo

AU - Mito, Collins

PY - 2015/6/15

Y1 - 2015/6/15

N2 - Using a set of up to 12 International GNSS Services (IGS) receivers around the East African region, we present the formation of the peak of ionospheric Equatorial Ionization Anomaly during the geomagnetic storm of 13th November 2012. The diurnal pattern of total electron content (TEC) shows a strong negative storm during the main phase of the storm. Latitudinal variation of TEC shows development of strong Equatorial Ionization Anomaly (EIA) on the recovery phase. Evidence in terms of magnetic variations during the storm period, indicates that the penetration of interplanetary electric fields is the main cause of the negative ionospheric effect during the main phase of the storm. Observation shows the occurrence of very strong westward electric fields arising from the IMF Bz turning southward a few hours after sunset local time. TEC enhancement during the recovery phase on the 16th are attributed to the increased ionospheric disturbance dynamo electric fields. In addition the EIA crest was found to intensify in amplitude as well as expand in latitudinal extent.

AB - Using a set of up to 12 International GNSS Services (IGS) receivers around the East African region, we present the formation of the peak of ionospheric Equatorial Ionization Anomaly during the geomagnetic storm of 13th November 2012. The diurnal pattern of total electron content (TEC) shows a strong negative storm during the main phase of the storm. Latitudinal variation of TEC shows development of strong Equatorial Ionization Anomaly (EIA) on the recovery phase. Evidence in terms of magnetic variations during the storm period, indicates that the penetration of interplanetary electric fields is the main cause of the negative ionospheric effect during the main phase of the storm. Observation shows the occurrence of very strong westward electric fields arising from the IMF Bz turning southward a few hours after sunset local time. TEC enhancement during the recovery phase on the 16th are attributed to the increased ionospheric disturbance dynamo electric fields. In addition the EIA crest was found to intensify in amplitude as well as expand in latitudinal extent.

KW - IGS

KW - Ionospheric ionization anomaly

KW - East African region

KW - Geomagnetic storm

U2 - 10.1016/j.asr.2015.03.011

DO - 10.1016/j.asr.2015.03.011

M3 - Journal article

VL - 55

SP - 2863

EP - 2872

JO - Advances in Space Research

JF - Advances in Space Research

SN - 0273-1177

IS - 12

ER -