Annual and semi-annual S q variations at 96° MM MAGDAS I and II stations in Africa | Zendy

R. El Hawary | Zendy; K. Yumoto | Zendy; Yosuke Yamazaki | Zendy; A. Mahrous | Zendy; Essam Ghamry | Zendy; A. Meloni | Zendy; K. Badi | Zendy; G. Kianji | Zendy; C.B.S. Uiso | Zendy; N. Mwiinga | Zendy; L. Joao | Zendy; Thomas Affluo | Zendy; P. Sutcliffe | Zendy; Gizaw Mengistu Tsidu | Zendy; P. Baki | Zendy; Shuji Abe | Zendy; Akihiro Ikeda | Zendy; Akiko Fujimoto | Zendy; T Tokunaga | Zendy

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Annual and semi-annual S q variations at 96° MM MAGDAS I and II stations in Africa

Author(s) -

R. El Hawary,

K. Yumoto,

Yosuke Yamazaki,

A. Mahrous,

Essam Ghamry,

A. Meloni,

K. Badi,

G. Kianji,

C.B.S. Uiso,

N. Mwiinga,

L. Joao,

Thomas Affluo,

P. Sutcliffe,

Gizaw Mengistu Tsidu,

P. Baki,

Shuji Abe,

Akihiro Ikeda,

Akiko Fujimoto,

T Tokunaga

Publication year - 2012

Publication title -

earth planets and space

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.835

H-Index - 74

eISSN - 1880-5981

pISSN - 1343-8832

DOI - 10.5047/eps.2011.10.013

Subject(s) - earth's magnetic field , quiet , southern hemisphere , northern hemisphere , climatology , meridian (astronomy) , geography , geology , magnetic field , physics , astronomy , quantum mechanics

The quiet daily variations of the geomagnetic field (Sq) have been studied by using the geomagnetic data of the 10 International Quietest Days. Geomagnetic data from MAGDAS I and II stations—ten stations were selected around the 96° magnetic meridian (MM)—over Africa have been analyzed from September 2008 to August 2009. The analysis of this unique data set clarifies the characteristics of the Sq variations over the African sector for the first time by observational geomagnetic data. In this paper, we found that Sq(H) and Sq(D) show a predominantly annual variation. The most interesting result, and a new finding in the African sector, is the appearance of two vortices in the day lit southern hemisphere during spring. Further data analysis also revealed many other interesting characteristics for the Sq over the African sector.

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