Pc3 pulsations during variable IMF conditions

• Main Authors: Villante, U., Lepidi, S., Francia, P., Vellante, M., Meloni, A., Lepping, R. P., Mariani, F.
• Other Authors: Villante, U.; Dipartimento di Fisica, Università dell'Aquila, L'Aquila, Italy, Lepidi, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia, Francia, P.; Dipartimento di Fisica, Università dell'Aquila, L'Aquila, Italy, Vellante, M.; Dipartimento di Fisica, Università dell'Aquila, L'Aquila, Italy, Meloni, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia, Lepping, R. P.; Laboratory for Extraterrestrial Physics, NASA/GSFC, Greenbelt, USA, Mariani, F.; Dipartimento di Fisica, Università di Roma-Tor Vergata, Italy, Dipartimento di Fisica, Università dell'Aquila, L'Aquila, Italy, Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia, Laboratory for Extraterrestrial Physics, NASA/GSFC, Greenbelt, USA, Dipartimento di Fisica, Università di Roma-Tor Vergata, Italy
• Format: Article in Journal/Newspaper
• Language: English
• Published: EGS - Springer-Verlag 1999
• Subjects: Magnetospheric physics; MHD waves and instabilities; Solar wind-magnetosphere interactions; 01. Atmosphere::01.03. Magnetosphere::01.03.99. General or miscellaneous; 01. Atmosphere::01.03. Magnetosphere::01.03.02. Magnetic storms; 01. Atmosphere::01.03. Magnetosphere::01.03.04. Structure and dynamics; Terra Nova Bay; Antarc*; Antarctica
• Online Access: http://hdl.handle.net/2122/3932

Pc3 geomagnetic field fluctuations detected at low latitude (L'Aquila, Italy) during the passage of a high velocity solar wind stream, characterized by variable interplanetary magnetic field conditions, are analyzed. Higher frequency resonant fluctuations and lower frequency phenomena are simultaneously observed; the intermittent appearance and the variable frequency of the longer period modes can be well interpreted in terms of the variable IMF elements; moreover their polarization characteristics are consistent with an origin related to external waves propagating in antisunward direction. A comparison with simultaneous observations performed at Terra Nova Bay (Antarctica) provides additional evidence for a clear relationship between the IMF and Pc3 pulsations also at very high latitudes. Published 490-496 N/A or not JCR reserved