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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 15, issue 6
Ann. Geophys., 15, 656–661, 1997
https://doi.org/10.1007/s00585-997-0656-3
© European Geosciences Union 1997
Ann. Geophys., 15, 656–661, 1997
https://doi.org/10.1007/s00585-997-0656-3
© European Geosciences Union 1997

  30 Jun 1997

30 Jun 1997

Low frequency geomagnetic field fluctuations at low latitude during the passage of a higher pressure solar wind region

U. Villante and P. Francia U. Villante and P. Francia
  • Dipartimento di Fisica, Universita' dell'Aquila, L'Aquila, Italy

Abstract. The passage of a higher pressure solar wind region at the Earth's orbit marked the onset of low latitude (L=1.6) fluctuations in the frequency range (0.8–5.5 mHz) for both the horizontal geomagnetic field components. Spectral peaks mostly occur at the same frequencies as the spectral enhancements which appeared in the long term analysis of experimental measurements from the same station and were tentatively interpreted in terms of ground signatures of global magnetospheric modes. A comparison with simultaneous observations discussed by previous investigations allows us to conclude that the same set of frequencies is enhanced in a wide portion of the Earth's magnetosphere.

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