Abstract
We compare the experimentally observed and model waveforms of the electromagnetic pulse associated with an abrupt change in the height of the Earth–ionosphere cavity, which was caused by an intense gamma-ray burst that arrived from the cosmic source in December 27, 2004. Polarization and spectral properties of the burst are examined. It is shown that the experimentally observed extremely low frequency (ELF) radio pulse exceeds the level of a regular Schumann-resonance background signal severalfold, and its waveform is close to the calculated one. The wave arrival angle is close to the direction towards the epicenter of the ionospheric disturbance. The time of pulse arrival at the Karymshino observatory (52.83°N, 158.13°E) is about 0.16 s ahead of the burst recording time.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 54, No. 1, pp. 16–25, January 2011.
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Nickolaenko, A.P., Schekotov, A.Y. Experimental detection of an ELF radio pulse associated with the gamma-ray burst of December 27, 2004. Radiophys Quantum El 54, 15–23 (2011). https://doi.org/10.1007/s11141-011-9268-6
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DOI: https://doi.org/10.1007/s11141-011-9268-6