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

作者：Gainville O^*; Henneton M; Coulouvrat F

来源：Geophysical Journal International, 2017, 209(3): 1913-1923.

DOI：10.1093/gji/ggx122

• Inverse theory
• Acoustic-gravity waves
• Guided waves
• Wave scattering and diffraction
• Wave propagation
• South America

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.

• 出版日期2017-6
• 单位中国地震局