A re-analysis of Carancas meteorite seismic and infrasound data based on sonic boom hypothesis

Abstract : Meteoroids entering the Earth atmosphere at high hypersonic velocities are a source of sonic boom that is recorded as infrasound signal at the ground level. The Carancas meteorite (Peru, 2007) is re-examined in this way as a reference case with ground crater and nearby seismic and infrasonic recordings. A new trajectory is proposed for this meteorite by minimizing the difference between computed and observed times of arrivals for geometrical arrivals. A scenario based on diffraction is proposed to explain non-geometrical arrivals. Model frequency spectra show a reasonable agreement with data, which allows estimation of the meteorite diameter in a narrow range compatible with crater observations.
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Article dans une revue
Geophysical Journal International, Oxford University Press (OUP), 2017, 209 (3), pp.1913 - 1923. 〈10.1093/gji/ggx122〉
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Soumis le : mercredi 13 septembre 2017 - 18:05:22
Dernière modification le : jeudi 11 janvier 2018 - 06:27:14

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O. Gainville, M. Henneton, F. Coulouvrat. A re-analysis of Carancas meteorite seismic and infrasound data based on sonic boom hypothesis. Geophysical Journal International, Oxford University Press (OUP), 2017, 209 (3), pp.1913 - 1923. 〈10.1093/gji/ggx122〉. 〈hal-01587202〉

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