Relations of field line resonances and upstream waves and the winter attenuation of pulsations
Using data on the occurrence frequency of geomagnetic pulsations of different periods from three observatories in Central Europe, conclusions are drawn about the occurrence of field line resonances and pulsations directly driven by upstream waves at <i>L</i>-values below...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
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| Series: | Annales Geophysicae |
| Online Access: | http://www.ann-geophys.net/13/689/1995/angeo-13-689-1995.html |
| _version_ | 1818369257146155008 |
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| author | J. VerH{o} I. Best M. Vellante H. Lühr M. de Lauretis L. Holló F. Märcz J. Struesutik |
| author_facet | J. VerH{o} I. Best M. Vellante H. Lühr M. de Lauretis L. Holló F. Märcz J. Struesutik |
| author_sort | J. VerH{o} |
| collection | DOAJ |
| description | Using data on the occurrence frequency of geomagnetic pulsations of different periods from three observatories in Central Europe, conclusions are drawn about the occurrence of field line resonances and pulsations directly driven by upstream waves at <i>L</i>-values below 3. It was found that both types occur during the interval studied (first 6 months of the year 1991), but both the occurrence frequency of the two types and the characteristic period of the field line resonance change significantly as compared to other intervals. During Northern winter, pulsation activity is severely damped in solar maximum years, including the year 1991. The decrease in the activity of the pulsations is more significant at shorter periods. |
| first_indexed | 2024-12-13T23:20:58Z |
| format | Article |
| id | doaj.art-2918fd23c3974e7c86302ce52c908703 |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-13T23:20:58Z |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-2918fd23c3974e7c86302ce52c9087032022-12-21T23:27:45ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-0576137689697Relations of field line resonances and upstream waves and the winter attenuation of pulsationsJ. VerH{o}I. BestM. VellanteH. LührM. de LauretisL. HollóF. MärczJ. StruesutikUsing data on the occurrence frequency of geomagnetic pulsations of different periods from three observatories in Central Europe, conclusions are drawn about the occurrence of field line resonances and pulsations directly driven by upstream waves at <i>L</i>-values below 3. It was found that both types occur during the interval studied (first 6 months of the year 1991), but both the occurrence frequency of the two types and the characteristic period of the field line resonance change significantly as compared to other intervals. During Northern winter, pulsation activity is severely damped in solar maximum years, including the year 1991. The decrease in the activity of the pulsations is more significant at shorter periods.http://www.ann-geophys.net/13/689/1995/angeo-13-689-1995.html |
| spellingShingle | J. VerH{o} I. Best M. Vellante H. Lühr M. de Lauretis L. Holló F. Märcz J. Struesutik Relations of field line resonances and upstream waves and the winter attenuation of pulsations Annales Geophysicae |
| title | Relations of field line resonances and upstream waves and the winter attenuation of pulsations |
| title_full | Relations of field line resonances and upstream waves and the winter attenuation of pulsations |
| title_fullStr | Relations of field line resonances and upstream waves and the winter attenuation of pulsations |
| title_full_unstemmed | Relations of field line resonances and upstream waves and the winter attenuation of pulsations |
| title_short | Relations of field line resonances and upstream waves and the winter attenuation of pulsations |
| title_sort | relations of field line resonances and upstream waves and the winter attenuation of pulsations |
| url | http://www.ann-geophys.net/13/689/1995/angeo-13-689-1995.html |
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