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Nonlinear character of ion cyclotron waves (Pc1 pulsations) with a spreading dynamical spectrum
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SYSNO ASEP 0326579 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Nonlinear character of ion cyclotron waves (Pc1 pulsations) with a spreading dynamical spectrum Author(s) Feygin, F. Z. (RU)
Kleimenova, N. G. (RU)
Khabazin, J. G. (RU)
Prikner, Karel (GFU-E)Source Title Geomagnetism and Aeronomy. - : MAIK Nauka - Interperiodica - ISSN 0016-7932
Roč. 49, č. 3 (2009), s. 317-323Number of pages 7 s. Language eng - English Country RU - Russian Federation Keywords Pc1 geomagnetic pulsations ; dynamical spectrum ; nonlinearity Subject RIV DE - Earth Magnetism, Geodesy, Geography CEZ AV0Z30120515 - GFU-E (2005-2011) UT WOS 000267242300005 DOI 10.1134/S0016793209030050 Annotation New types of Pc1 geomagnetic pulsations with a narrow dynamical spectrum at the onset of an event and with a very broad spectrum during the development of the process have been analyzed. The observed phenomena can be divided into three types according to the evolution of their dynamical spectra: (1) events with a spectrum spreading toward low frequencies, (2) events with a symmetrically spreading spectrum, and (3) events with a spectrum spreading toward high frequencies. All events were mainly observed at local night during the recovery phase of moderate magnetic storms. It has been proposed to interpret spreading Pc1 pulsation spectra as manifestations of ion cyclotron wave nonlinearity. Workplace Geophysical Institute Contact Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028 Year of Publishing 2010
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