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- Michel Campillo
- Laboratoire de Géophysique Interne et Tectonophysique, Observatoire de Grenoble, Université Joseph Fourier & CNRS, BP 53, 38041 Grenoble, France.
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- Anne Paul
- Laboratoire de Géophysique Interne et Tectonophysique, Observatoire de Grenoble, Université Joseph Fourier & CNRS, BP 53, 38041 Grenoble, France.
書誌事項
- 公開日
- 2003-01-24
- DOI
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- 10.1126/science.1078551
- 公開者
- American Association for the Advancement of Science (AAAS)
この論文をさがす
説明
<jats:p>The late seismic coda may contain coherent information about the elastic response of Earth. We computed the correlations of the seismic codas of 101 distant earthquakes recorded at stations that were tens of kilometers apart. By stacking cross-correlation functions of codas, we found a low-frequency coherent part in the diffuse field. The extracted pulses have the polarization characteristics and group velocities expected for Rayleigh and Love waves. The set of cross-correlations has the symmetries of the surface-wave part of the Green tensor. This seismological example shows that diffuse waves produced by distant sources are sufficient to retrieve direct waves between two perfectly located points of observation. Because it relies on general properties of diffuse waves, this result has potential applications in other fields.</jats:p>
収録刊行物
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- Science
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Science 299 (5606), 547-549, 2003-01-24
American Association for the Advancement of Science (AAAS)
