Long-period geomagnetic pulsations caused by the solar wind negative pressure impulse on 22 March 1979 (CDAW-6)
An analysis is made of the long-period geomagnetic pulsations as recorded at seven Norilsk meridian stations (<i>λ</i>=162°, latitudinal range: 61°–71°N) following abrupt magnetospheric expansion during the storm of 22 March 1979 caused by a rapid decrease in solar wind de...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
1998-02-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/16/134/1998/angeo-16-134-1998.pdf |
| _version_ | 1811344330817798144 |
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| author | V. A. Parkhomov V. V. Mishin L. V. Borovik |
| author_facet | V. A. Parkhomov V. V. Mishin L. V. Borovik |
| author_sort | V. A. Parkhomov |
| collection | DOAJ |
| description | An analysis is made of the long-period
geomagnetic pulsations as recorded at seven Norilsk meridian stations
(<i>λ</i>=162°, latitudinal range: 61°–71°N) following abrupt
magnetospheric expansion during the storm of 22 March 1979 caused by a rapid
decrease in solar wind density. As with the time interval following an abrupt
contraction at the time of sudden storm commencement, there exist two types of
pulsations in the pulsation spectra: latitude-independent <br>
(<i>T</i>>400 s) and latitude-dependent (<i>T</i><200 s) pulsations. The
first pulsation type is interpreted in terms of forced pulsations associated
with magnetopause oscillations. The oscillation period is determined by plasma
density in the boundary layer and by the radius of the magnetosphere (<i>T</i> ~ <i>ρ</i><sup>1/2</sup><i>R</i><sup>4</sup>).
The latitudinal dependence of the period, amplitude and polarization of the
second-type pulsations is in agreement with the resonance mechanism of their
origin.<br><br><b>Keywords.</b> Geomagnetic pulsations · Solar wind ·
Magnetopause oscillations |
| first_indexed | 2024-04-13T19:45:45Z |
| format | Article |
| id | doaj.art-bda199dcefaf4290a47d59b5c1674512 |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-04-13T19:45:45Z |
| publishDate | 1998-02-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-bda199dcefaf4290a47d59b5c16745122022-12-22T02:32:44ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05761998-02-011613413910.1007/s00585-998-0134-6Long-period geomagnetic pulsations caused by the solar wind negative pressure impulse on 22 March 1979 (CDAW-6)V. A. Parkhomov0V. V. Mishin1L. V. Borovik2Irkutsk State Economy Academy, Lenin street 11, Irkutsk 3, 664003, RussiaInstitute of Solar-Terrestrial Physics, Irkutsk 33, PO Box 4026, 664033, RussiaIrkutsk State Economy Academy, Lenin street 11, Irkutsk 3, 664003, RussiaAn analysis is made of the long-period geomagnetic pulsations as recorded at seven Norilsk meridian stations (<i>λ</i>=162°, latitudinal range: 61°–71°N) following abrupt magnetospheric expansion during the storm of 22 March 1979 caused by a rapid decrease in solar wind density. As with the time interval following an abrupt contraction at the time of sudden storm commencement, there exist two types of pulsations in the pulsation spectra: latitude-independent <br> (<i>T</i>>400 s) and latitude-dependent (<i>T</i><200 s) pulsations. The first pulsation type is interpreted in terms of forced pulsations associated with magnetopause oscillations. The oscillation period is determined by plasma density in the boundary layer and by the radius of the magnetosphere (<i>T</i> ~ <i>ρ</i><sup>1/2</sup><i>R</i><sup>4</sup>). The latitudinal dependence of the period, amplitude and polarization of the second-type pulsations is in agreement with the resonance mechanism of their origin.<br><br><b>Keywords.</b> Geomagnetic pulsations · Solar wind · Magnetopause oscillationshttps://www.ann-geophys.net/16/134/1998/angeo-16-134-1998.pdf |
| spellingShingle | V. A. Parkhomov V. V. Mishin L. V. Borovik Long-period geomagnetic pulsations caused by the solar wind negative pressure impulse on 22 March 1979 (CDAW-6) Annales Geophysicae |
| title | Long-period geomagnetic pulsations caused by the solar wind negative pressure impulse on 22 March 1979 (CDAW-6) |
| title_full | Long-period geomagnetic pulsations caused by the solar wind negative pressure impulse on 22 March 1979 (CDAW-6) |
| title_fullStr | Long-period geomagnetic pulsations caused by the solar wind negative pressure impulse on 22 March 1979 (CDAW-6) |
| title_full_unstemmed | Long-period geomagnetic pulsations caused by the solar wind negative pressure impulse on 22 March 1979 (CDAW-6) |
| title_short | Long-period geomagnetic pulsations caused by the solar wind negative pressure impulse on 22 March 1979 (CDAW-6) |
| title_sort | long period geomagnetic pulsations caused by the solar wind negative pressure impulse on 22 march 1979 cdaw 6 |
| url | https://www.ann-geophys.net/16/134/1998/angeo-16-134-1998.pdf |
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