Anomalous ionospheric storm on 21 March 2003

1Grigorenko, Ye.I, 1Lysenko, VN, 1Pazura, SA, 1Taran, VI, 2Chernogor, LF
1Institute of Ionosphere of the National Academy of Sciences of Ukraine and Ministry of Education and Science of Ukraine, Kharkiv, Ukraine
2V.N. Karazin National University of Kharkiv, Kharkiv, Ukraine
Kosm. nauka tehnol. 2004, 10 ;(1):004-011
Publication Language: Russian
Our results of the study of the two-phase ionospheric storm in 20–21 March 2003 are presented. The strongest negative phase of the storm can be considered as anomalous one because it was proceeding on the background of moderate geomagnetic disturbance (Ар = 29, Кр = 5). Special attention is paid to the diagnostic of processes accompanying the change of storm phase that occurred during sunset period (17:00–18:00 UT). The mechanisms forming a deep negative ionospheric disturbance are discussed in detail.
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