A study of Sq variation at Addis Ababa |
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| Affiliation: | 1. Institute of Marine Sciences, University of Chittagong, Chittagong 4331, Bangladesh;2. Department of Economics, University of Chittagong, Chittagong 4331, Bangladesh;3. Department of Oceanography, Shahjalal University of Science and Technology, Sylhet 3114, Bangladesh;4. Department of Marketing, University of Chittagong, Chittagong 4331, Bangladesh;1. Centre de recherche en neuropsychologie et cognition (CERNEC), Université de Montréal, Québec, Canada;2. Département de Sciences Biomédicales, Université de Montréal, Montréal, Québec, Canada;3. Département de Psychologie, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montréal, Québec, Canada H3C 3J7;4. Département de Radiologie, Radio-Oncologie et Médecine Nucléaire, Université de Montréal, Montréal, Québec, Canada;5. Centre Hospitalier Universitaire Sainte-Justine, Montréal, Québec, Canada;6. Centre Hospitalier Universitaire de Montréal, Montréal, Québec, Canada;1. Unidad de Cirugía Endocrina, Bariátrica y Metabólica, Servicio de Cirugía General, Hospital Universitari Vall d’Hebron, Universitat Autonoma de Barcelona, Barcelona, España;2. Servicio de Cirugía Gastrointestinal, Hospital Clinic de Barcelona, Universidad de Barcelona, Barcelona, España;1. Department of Orthopedic Surgery, Yeungnam University College of Medicine, Daegu, Republic of Korea;2. Yeungnam University Medical Center, Daegu, Republic of Korea;1. Behavioral Sciences Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran;2. School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran;1. Endeavour College of Natural Health, Queensland, Australia;2. Australian Research Centre in Complementary and Integrative Medicine, Faculty of Health, University of Technology Sydney, Ultimo, New South Wales, Australia |
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| Abstract: | We analyse the Sq variation at Addis Ababa, Ethiopia for 1958 through 1973. The increase in importance of the semidiurnal H field relative to the diurnal H field during low sunspot years reflects an enhanced counter-electrojet effect at such times. The range of H exhibits a direct sunspot influence for all seasons, and the e-season range dominates over that of the d and j seasons. The Z and D field components are little influenced by sunspot occurrence and in both cases the range of the j season dominates over that of the e and d seasons. The daytime relation between H and Z variations is needle-shaped, indicating that changes in Z are proportional to changes in H; the night-time relation is quite complex. |
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