On influence of MHD resonators upon geomagnetic pulsations

Authors

  • B. Dovbnya Geophysical Observatory Borok, Institute of Physics of the Earth, RAS, Borok, Yaroslav, Russian Federation
  • A. Potapov Institute of Solar-Terrestrial Physics SB RAS, Irkutsk, Russian Federation
  • A. Guglielmi Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences, Russian Federation
  • R. Rakhmatulin Institute of Solar-Terrestrial Physics SB RAS, Irkutsk, Russian Federation

DOI:

https://doi.org/10.24028/gzh.0203-3100.v36i6.2014.111053

Keywords:

resonators, geomagnetic pulsations, discrete structure of spectrum

Abstract

The examples of the time-frequency structure of geomagnetic pulsations are given. It is shown that in some cases the pulsations of different types may have one thing in common — a discrete structure of dynamic spectrum. The discreteness is manifested in the alternation of "permitted" and "forbidden" frequencies. Such a structure is analogous to a periodic ripple structure of spectral bands formed by MHD cavities in magnetosphere-ionosphere plasma. Appearance of discrete spectrum of pulsations is attributed to resonator filtering properties acting on hydro-magnetic waves as they pass through the resonant cavity. It is assumed that in some cases the discreteness can provide useful information about the propagation channels of signals of lithospheric or magnetospheric origin.

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Published

2014-12-01

How to Cite

Dovbnya, B., Potapov, A., Guglielmi, A., & Rakhmatulin, R. (2014). On influence of MHD resonators upon geomagnetic pulsations. Geofizicheskiy Zhurnal, 36(6), 143–152. https://doi.org/10.24028/gzh.0203-3100.v36i6.2014.111053

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