Global Pc5 pulsations during strong magnetic storms: excitation mechanisms and equatorward expansion
The dynamics of global Pc5 waves during the magnetic storms on 29–31 October 2003 are considered using data from the trans-American and trans-Scandinavian networks of magnetometers in the morning and post-noon magnetic local time (MLT) sectors. We study the latitudinal distribution of Pc5 wave sp...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2014-04-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/32/319/2014/angeo-32-319-2014.pdf |
| _version_ | 1828526732075859968 |
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| author | J. Marin V. Pilipenko O. Kozyreva M. Stepanova M. Engebretson P. Vega E. Zesta |
| author_facet | J. Marin V. Pilipenko O. Kozyreva M. Stepanova M. Engebretson P. Vega E. Zesta |
| author_sort | J. Marin |
| collection | DOAJ |
| description | The dynamics of global Pc5 waves during the magnetic storms on 29–31 October 2003
are considered using data from the trans-American and trans-Scandinavian
networks of magnetometers in the morning and post-noon magnetic local time (MLT) sectors. We study
the latitudinal distribution of Pc5 wave spectral characteristics to
determine how deep into the magnetosphere these Pc5 waves can extend at
different flanks of the magnetosphere. The wave energy transmission
mechanisms are different during 29–30 October and 31 October wave events. Further,
we examine whether the self-excited Kelvin–Helmholtz instability is sufficient as an
excitation mechanism for the global Pc5 waves. We suggest that on 31 October a
magnetospheric magnetohydrodynamic (MHD) waveguide was excited, and the rigid regime of its
excitation was triggered by enhancements of the solar wind density. The
described features of Pc5 wave activity during recovery phase of strong
magnetic storm are to be taken into account during the modeling of the
relativistic electron energization by ultra-low-frequency (ULF) waves. |
| first_indexed | 2024-12-11T21:28:10Z |
| format | Article |
| id | doaj.art-fb4c90689f29488381a895813bc478f9 |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-11T21:28:10Z |
| publishDate | 2014-04-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-fb4c90689f29488381a895813bc478f92022-12-22T00:50:15ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762014-04-013231933110.5194/angeo-32-319-2014Global Pc5 pulsations during strong magnetic storms: excitation mechanisms and equatorward expansionJ. Marin0V. Pilipenko1O. Kozyreva2M. Stepanova3M. Engebretson4P. Vega5E. Zesta6Universidad de La Serena, La Serena, Región de Coquimbo, ChileSpace Research Institute, Moscow 117997, RussiaInstitute of Physics of the Earth, Moscow 123995, RussiaUniversidad de Santiago de Chile, Santiago 9170124, ChileAugsburg College, Minneapolis, MN 55454, USAUniversidad de La Serena, La Serena, Región de Coquimbo, ChileGoddard Space Flight Center, Greenbelt, MD 20771, USAThe dynamics of global Pc5 waves during the magnetic storms on 29–31 October 2003 are considered using data from the trans-American and trans-Scandinavian networks of magnetometers in the morning and post-noon magnetic local time (MLT) sectors. We study the latitudinal distribution of Pc5 wave spectral characteristics to determine how deep into the magnetosphere these Pc5 waves can extend at different flanks of the magnetosphere. The wave energy transmission mechanisms are different during 29–30 October and 31 October wave events. Further, we examine whether the self-excited Kelvin–Helmholtz instability is sufficient as an excitation mechanism for the global Pc5 waves. We suggest that on 31 October a magnetospheric magnetohydrodynamic (MHD) waveguide was excited, and the rigid regime of its excitation was triggered by enhancements of the solar wind density. The described features of Pc5 wave activity during recovery phase of strong magnetic storm are to be taken into account during the modeling of the relativistic electron energization by ultra-low-frequency (ULF) waves.https://www.ann-geophys.net/32/319/2014/angeo-32-319-2014.pdf |
| spellingShingle | J. Marin V. Pilipenko O. Kozyreva M. Stepanova M. Engebretson P. Vega E. Zesta Global Pc5 pulsations during strong magnetic storms: excitation mechanisms and equatorward expansion Annales Geophysicae |
| title | Global Pc5 pulsations during strong magnetic storms: excitation mechanisms and equatorward expansion |
| title_full | Global Pc5 pulsations during strong magnetic storms: excitation mechanisms and equatorward expansion |
| title_fullStr | Global Pc5 pulsations during strong magnetic storms: excitation mechanisms and equatorward expansion |
| title_full_unstemmed | Global Pc5 pulsations during strong magnetic storms: excitation mechanisms and equatorward expansion |
| title_short | Global Pc5 pulsations during strong magnetic storms: excitation mechanisms and equatorward expansion |
| title_sort | global pc5 pulsations during strong magnetic storms excitation mechanisms and equatorward expansion |
| url | https://www.ann-geophys.net/32/319/2014/angeo-32-319-2014.pdf |
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