References

Chulliat, A., E. Blanter, J.-L. Le Mouël, and M. Shnirman (2005), On the seasonal asymmetry of the diurnal and semidiurnal geomagnetic variations, J. Geophys. Res., 110, A05301, doi:10.1029/2004JA010551. [CrossRef]

Chulliat, A., and K. Telali (2007), World monthly means database project, Publs. Inst. Geophys. Pol. Acad. Sc., C-99, (398), 268.

Courtillot, V., J. Ducruix, and J.-L. Le Mouël (1978), Sur une accélération récente de la variation séculaire du champ magnétique terrestre, C. R. Acad. Sci. Paris, D 287, 1095.

Courtillot, V., and A. Chulliat, Eds. (2008), Magnetic Results 2004, 275 pp., Bureau Central de Magnétisme Terrestre, Paris.

Friis-Christensen, E., H. Lühr, and G. Hulot (2006), Swarm: A constellation to study the Earth's magnetic field, Earth Planets Space, 58, 351.

Jankowski, J., and C. Sucksdorff (1996), Guide for Magnetic Measurements and Observatory Practice, 232 pp., IAGA, Warshaw.

Kerridge, D. (2007), Magnetic observatories in the 21st century: an endangered species?, Publs. Inst. Geophys. Pol. Acad. Sc., C-99, (398), 301.

Mandea, M., E. Bellanger, and J.-L. Le Mouël (2000), A geomagnetic jerk for the end of the 20th century, Earth Planet. Sci. Lett., 183, 369.

Newitt, L. (2007), A search for users of magnetic observatory data, Publs. Inst. Geophys. Pol. Acad. Sc., C-99, (398), 310.

Olsen, N., L. Tøffner-Clausen, T. J. Sabaka, P. Brauer, J. M. G. Merayo, J. L. Jørgensen, J.-M. Léger, O. V. Nielsen, F. Primdahl, and T. Risbo (2003), Calibration of the Ørsted vector magnetometer, Earth Planets Space, 55, 11.

Olsen, N., and M. Mandea (2007), Investigation of a secular variation impulse using satellite data: The 2003 geomagnetic jerk, Earth Planet. Sci. Lett., 255, 94.

St-Louis, B., Ed. (2007), INTERMAGNET Technical Reference Manual, Version 4.3, 88 pp., JAGA, Edinburgh.

Svalgaard, L., and E. W. Cliver (2007), Interhourly variability index of geomagnetic activity and its use in deriving the long-term variation of solar wind speed, J. Geophys. Res., 112, A10111, doi:10.1029/2007JA012437. [CrossRef]


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