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Time scheduling of magnetic surveys in mid-latitudes with respect to forecasting geomagnetic activity


The quality of magnetic surveys is essentially influenced by the geomagnetic activity. As the in situ measurements are usually limited to very short time period, they must be compared with observatory continuous registrations. When reducing measurements one makes an assumption that diurnal variations of the magnetic field are identical at both the station and the reference observatory. During magnetically quite periods, this assumption is satisfied to an acceptable extent. However, under high geomagnetic activity, the error may easily exceed the acceptable limit. Our analysis indicates that, in mid-latitudes, magnetic surveys should not be made, if some of the Kp values are over 5. Long-term and medium-term forecasts of geomagnetic activity are based on known periodicities (11-year, half-year and 27-day). Short-term forecasts are based on the knowledge of the actual conditions on the Sun, in the solar wind and in the interplanetary magnetic field. Regional Warning Centres, associated in the International Space Environment Service (ISES) deal with forecasts of geomagnetic activity. Links to all 12 centres can be obtained through


  1. Bochníček, J. and P. Hejda, Areas of minimum intensity of soft X-rays as sources of solar wind high-speed streams, J. Atmos. Solar-Terr. Phys., 64, 511–515, 2002.

  2. Ness, N. F., Interplanetary magnetic field dynamics, in Space Storms and Space Weather Hazards, edited by I. A. Daglis, pp. 131–155, Kluwer, 2001.

  3. Neugebauer, M. and R. Goldstein, Particle and field signatures of Coronal Mass Ejections in the solar wind, in Coronal Mass Ejections, edited by N. Crooker, J. A. Joselyn, and J. Feynman, pp. 245–251, AGU, 1997.

  4. Newitt, L. R. and J. K. Walker, Removing magnetic activity from high latitude magnetic repeat station observations, J. Geomag. Geoelectr., 42, 937–949, 1990.

  5. Newitt, L. R, C. E. Barton, and J. Bitterley, Guide for Magnetic Repeat Station Surveys, 112 pp., International Association of Geomagnetism and Aeronomy, 1996.

  6. Schulz, G. and M. Beblo, On the reduction of time variations for magnetic repeat station measurements, Geophysical Surveys, 6, 323–332, 1984.

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Correspondence to Pavel Hejda.

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Hejda, P., Bochníček, J., Horáček, J. et al. Time scheduling of magnetic surveys in mid-latitudes with respect to forecasting geomagnetic activity. Earth Planet Sp 58, 735–740 (2006).

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Key words

  • Magnetic surveys
  • repeat stations
  • geomagnetic activity