Equatorial ionospheric disturbances over the East African sector during the 2015 St. Patrick's day storm

被引：21
|
作者：
Olwendo, O. J. [1 ]
Cesaroni, C. [2 ]
Yamazaki, Y. [3 ]
Cilliers, P. [4 ,5 ]
机构：
[1] Pwani Univ, Sch Pure & Appl Sci, Dept Math & Phys, POB 195-80108, Kilifi, Kenya
[2] Ist Nazl Geofis & Vulcanol, I-00143 Rome, Italy
[3] GFZ German Res Ctr Geosci, Potsdam, Germany
[4] South African Natl Space Agcy, Space Sci Directorate, POB 32, Hermanus, South Africa
[5] Univ Cape Town, Dept Elect Engn, ZA-7701 Rondebosch, South Africa
来源：
ADVANCES IN SPACE RESEARCH | 2017年 / 60卷 / 08期
关键词：
Disturbance currents; Equatorial ionosphere; Geomagnetic storms; GNSS; DAY GEOMAGNETIC STORM; ELECTRIC-FIELDS; LOW-LATITUDE; DIRECT PENETRATION; DYNAMO; THERMOSPHERE; REGION; MODEL; LAYER; DRIFT;
D O I：
10.1016/j.asr.2017.06.037
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
During solar cycle 24, the St. Patrick's Day storm on 17 March, 2015 was one of the most severe geomagnetic storms. Several research investigations have been done and are still ongoing about this storm since the dynamics of this storm differs on a global scale from one sector to another. This study examines the response of the equatorial ionosphere to the storm in the East African sector. Total electron content (TEC) data from ground stations are used to investigate the evolution of the Equatorial Ionization Anomaly (EIA) during the storm. The TEC observations show a reduced EIA during 18-20 March 2015, consistent with previous studies at other longitudes. Analyses of ground magnetometer data and the thermospheric composition data from the NASA/TIMED satellite reveal that the reduced ETA during the storm can arise from the combined effect of the disturbance dynamo and composition change. (C) 2017 COSPAR. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：1817 / 1826
页数：10
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