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Global impulse burst of geomagnetic pulsations in the frequency range of 0.2-5 Hz as a precursor of the sudden commencement of St. Patrick's Day 2015 geomagnetic stormстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 9 ноября 2017 г.
- Авторы: Parkhomov V.A., Borodkova N.L., Yahnin A.G., Suvorova A.V., Dovbnya B.V., Pashinin A.Yu, Kozelov B.V.
- Журнал: Cosmic Research (English translation of Kosimicheskie Issledovaniya)
- Том: 55
- Номер: 5
- Год издания: 2017
- Издательство: Pleiades Publishing, Inc.
- Местоположение издательства: New York, USA
- Первая страница: 307
- Последняя страница: 317
- DOI: 10.1134/S0010952517050070
- Аннотация: We have analyzed a short-term (3-4 s) burst of geomagnetic pulsations in the frequency range of 0.2-5 Hz observed during the commencement of a magnetic storm on March 17, 2015. The burst was observed by a network of observatories in different sectors of local time and at different latitudes. The spectra of pulsations involves a resonant structure with a global maximum at a frequency of 2.78 +/- 0.38 Hz, despite some differences at different observatories. There is a delay by almost 4 s in the maximum of the train amplitude at nightside observatories with respect to a dayside observatory. The burst of pulsations has been shown to be on the front of the magnetic disturbance associated with sudden storm commencement (SSC) and, therefore, can be considered as a precursor. The observations of particle fluxes by low-orbit satellites have shown that the SSC is accompanied by a dramatic increase in the fluxes of precipitating protons and electrons. We have suggested that the mechanism of oscillation generation may be the ion-cyclotron instability of ring current protons and the resonant structure of pulsations may be associated with the ionospheric Alfv,n resonator.
- Добавил в систему: Никитина Виктория Владимировна