Journal cover Journal topic
Annales Geophysicae An open-access journal of the European Geosciences Union
Ann. Geophys., 29, 1977-1984, 2011
© Author(s) 2011. This work is distributed
under the Creative Commons Attribution 3.0 License.
Regular paper
02 Nov 2011
Global observation of 24 November 2006 Pc5 pulsations by single mid-latitude underground [SQUID]2 system
J. Marfaing1, E. Pozzo di Borgo2, G. Waysand3, A. Cavaillou3, and M. Parrot4 1Université d'Aix-Marseille, IM2NP-UMR 6242 CNRS, case 142, Faculté des Sciences de Saint Jérôme, 13397 Marseille cedex 20, France
2Université d'Avignon et des Pays de Vaucluse, UMR 1114 INRA-UAPV EMMAH, rue Louis Pasteur 84000 Avignon, France
3Université de Nice Sophia-Antipolis, Observatoire de la Côte d'Azur, Laboratoire Souterrain Bas Bruit de Rustrel-Pays d'Apt (LSBB), La Grande Combe 84400 Rustrel, France
4CNRS and Université d'Orléans, LPC2E, 3A, Avenue de la Recherche Scientifique, 45071 Orléans cedex 2, France
Abstract. On 24 November 2006, simultaneous observations of Pc5 pulsations, electron precipitation and whistler-mode chorus, as well as solar wind and IMF parameters have been analyzed based on data from IMAGE magnetometers, riometer array and temporal VLF station. This paper focuses on the Pc5 pulsations detected at the same time, in the 1–25 millihertz range, by the [SQUID]2 system (SQUID magnetometer within a Shielding QUalified for Ionosphere Detection) installed 518 m underground at 43.92° N, 5.48° E. As expected, the 3-D-frequency spectrum of these mid-latitude [SQUID]2 signals exhibits frequency peaks quasi identical to those observed by polar stations of close geomagnetic longitude. The signal/noise ratio allows the observation of the wave polarization and the beatings of the frequencies. As a result, the possibility of studying, at mid-latitude, magnetic Pc5 pulsations linked with an event in the magnetosphere can improve the description of both behaviour and propagation of these waves.

Citation: Marfaing, J., Pozzo di Borgo, E., Waysand, G., Cavaillou, A., and Parrot, M.: Global observation of 24 November 2006 Pc5 pulsations by single mid-latitude underground [SQUID]2 system, Ann. Geophys., 29, 1977-1984, doi:10.5194/angeo-29-1977-2011, 2011.
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