Book ChapterDOI
The Ionosphere and Upper Atmosphere
Arthur D. Richmond
- pp 35-44
TLDR
In this article, the variability of ionospheric density and electric currents during magnetic storms is studied, and to what extent valid predictions of those phenomena and their effects can be made.Abstract:
Because our society is becoming increasingly dependent on technological systems that can be affected by ionospheric phenomena during geomagnetic storms, the ionosphere, its electrodynamics, and its coupling with the neutral atmosphere and the magnetosphere are being studied as part of a coordinated program of "space weather" research. This research seeks to characterize the variability of ionospheric density and electric currents during magnetic storms, and to determine to what extent valid predictions of those phenomena and their effects can be made.read more
Citations
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Journal ArticleDOI
Reexamination of the Sq‐EEJ relationship based on extended magnetometer networks in the east Asian region
Yosuke Yamazaki,K. Yumoto,Teiji Uozumi,Shuji Abe,M. G. Cardinal,Daniel J. McNamara,R. Marshall,Boris Shevtsov,S. I. Solovyev +8 more
TL;DR: In this article, the daily Sq-equatorial electrojet (EEJ) relationship based on these extended magnetometer networks in the east Asian region was examined, and the results indicated that the daily values of Sq and EEJ react in the same manner to temporal changes of solar ionization and heating of the ionosphere.
Journal ArticleDOI
Equivalent current systems for the annual and semiannual Sq variations observed along the 210°MM CPMN stations
TL;DR: In this paper, the authors analyzed ground magnetometer data for the 10 International Quiet Days during 1996-2007 and deduced the Latent Local Time (LAT-LT) diagram of the equivalent Sq current system, which can be regarded as the superposition of the following three current systems: Sq0, Sq1, and Sq2.
Journal ArticleDOI
Long-term behavior of annual and semi-annual Sq variations
Yosuke Yamazaki,Kiyohumi Yumoto +1 more
TL;DR: In this article, the authors examined the long-term behavior (solarcycle time scale) of annual and semi-annual Sq variations and found that the amplitudes of all three components have a positive linear correlation with the sunspot number.
Journal ArticleDOI
An experiment to study solar flare effects on radio-communication signals
D.B. Contreira,Fabiano S. Rodrigues,Kazuo Makita,Christiano Garnett Marques Brum,Walter D. Gonzalez,Nalin Babulal Trivedi,M. R. da Silva,Nelson Jorge Schuch +7 more
TL;DR: In this paper, a simple experiment to monitor the behavior of lower ionosphere has been carried out at the Southern Space Observatory-SSO/INPE (29.43°S, 53.8°W), located in southern Brazil.
Journal ArticleDOI
Possible Anomalous Changes in Solar Quiet Daily Geomagnetic Variation (Sq) Related to the 2011 off the Pacific coast of Tohoku Earthquake (Mw 9.0)
TL;DR: In this paper, the authors investigated observational data from 20 geomagnetic observatories at longitudes of 130°E to 150°E between 2009 and 2012 in order to detect possible anomalous changes in the geOMagnetic solar quiet daily(Sq) variation related to the 2011 off the Pacific coast of Tohoku earthquake (Mw 9.0) that occurred on March 11, 2011, in Japan.
References
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Journal ArticleDOI
Interhemispheric asymmetry of the high-latitude ionospheric convection pattern
Gang Lu,Arthur D. Richmond,Barbara A. Emery,Patricia H. Reiff,O. de la Beaujardiere,F. J. Rich,W. F. Denig,H. W. Kroehl,Larry R. Lyons,J. M. Ruohoniemi,E. Friis-Christensen,H. J. Opgenoorth,Moa Persson,R. P. Lepping,Alan S. Rodger,T. J. Hughes,A. McEwin,S. Dennis,Ray J. Morris,Gavin Burns,L. Tomlinson +20 more
TL;DR: In this article, the authors used assimilative mapping of ionospheric electrodynamics technique to derive the large-scale high-latitude ionosphere convection patterns simultaneously in both northern and southern hemispheres during the period of January 27-29, 1992.