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In: Contributions to Geophysics and Geodesy, vol. 35, no. 1
Pavel Kostecký - Adriena Ondrášková - Sebastián Ševčík - Ladislav Rosenberg - Igor Kohút

Observations of the anomalous third Schumann resonance peak during October 21 to 25, 2004 at Modra Observatory and a possible explanation

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Year, pages: 2005, 33 - 51
Keywords: electromagnetic field, resonances, ionosphere, Schumann resonances, lightnings

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At the Astronomical and Geophysical Observatory of FMFI UK at Modra, the permanent monitoring of Schumann resonance (SchR) spectra has been performed for more than three years (in electric field component - the SchR magnetic field component spectra have been measured - up to now - only intermittently for a shorter time). During second half of October 2004, several cases of anomalously high third SchR mode amplitude were observed. Because the man-made artifacts as a cause can be (with high probability) excluded, we seek for the possible natural explanation. Two explanations appear to be physically plausible: the occurrence of multiple return strokes (MRS) or the very special geometrical source-receiver relations. We propose that the dynamical behavior of short-interval spectra can distinguish between them.

How to cite:

ISO 690:
Kostecký, P., Ondrášková, A., Ševčík, S., Rosenberg, L., Kohút, I. 2005. Observations of the anomalous third Schumann resonance peak during October 21 to 25, 2004 at Modra Observatory and a possible explanation. In Contributions to Geophysics and Geodesy, vol. 35, no.1, pp. 33-51.

APA:
Kostecký, P., Ondrášková, A., Ševčík, S., Rosenberg, L., Kohút, I. (2005). Observations of the anomalous third Schumann resonance peak during October 21 to 25, 2004 at Modra Observatory and a possible explanation. Contributions to Geophysics and Geodesy, 35(1), 33-51.