A statistical study of occurrence probability of spread F at high latitudes
1962; American Geophysical Union; Volume: 67; Issue: 12 Linguagem: Inglês
10.1029/jz067i012p04617
ISSN2156-2202
Autores Tópico(s)Geomagnetism and Paleomagnetism Studies
ResumoJournal of Geophysical Research (1896-1977)Volume 67, Issue 12 p. 4617-4634 A statistical study of occurrence probability of spread F at high latitudes Tatsuo Shimazaki, Tatsuo ShimazakiSearch for more papers by this author Tatsuo Shimazaki, Tatsuo ShimazakiSearch for more papers by this author First published: November 1962 https://doi.org/10.1029/JZ067i012p04617Citations: 21AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract At extremely high latitudes (>60°), ionospheric conditions are very complicated, and there are sometimes irregularities of electron density due to which spread F is considered to occur in the F regions, although its presence cannot always be detected on ionograms. Paying special attention to the occurrence of these conditions, we have considered three possible definitions of the occurrence probability of spread F. On the basis of each of these definitions, the latitudinal, diurnal, seasonal, and solar-cycle variations are calculated, and the results are discussed. The effects of geomagnetic and auroral activity are also discussed and are compared with respect to the three definitions mentioned above. 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Citing Literature Volume67, Issue12November 1962Pages 4617-4634 ReferencesRelatedInformation
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