Emergence of broadband Rayleigh waves from correlations of the ambient seismic noise

Geophysical Research Letters - Tập 31 Số 7 - 2004
Н. М. Шапиро1, Michel Campillo2
1Center for Imaging the Earth's Interior, Department of Physics, University of Colorado at Boulder, Boulder, Colorado, USA
2Laboratoire de Géophysique Interne et Tectonophysique, Observatoire de Grenoble Université Joseph Fourier & CNRS Grenoble France

Tóm tắt

We demonstrate that the coherent information about the Earth structure can be extracted from the ambient seismic noise. We compute cross‐correlations of vertical component records of several days of seismic noise at different pairs of stations separated by distances from about one hundred to more than two thousand kilometers. Coherent broadband dispersive wavetrains clearly emerge with group velocities similar to those predicted from the global Rayleigh‐wave tomographic maps that have been constrained using ballistic surface waves. Those results show that coherent Rayleigh waves can be extracted from the ambient seismic noise and that their dispersion characteristics can be measured in a broad range of periods. This provides a source for new types of surface‐wave measurements that can be obtained for numerous paths that could not be sampled with the ballistic waves and, therefore, can significantly improve the resolution of seismic images.

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Tài liệu tham khảo

10.1016/0031-9201(90)90005-I

10.1029/JB080i023p03322

10.1126/science.1078551

10.1103/PhysRevE.65.066605

10.1121/1.1570436

10.1038/362430a0

10.1023/A:1009788904007

10.1103/PhysRevLett.86.3447

10.1016/0031-9201(91)90066-Q

10.1023/A:1005251208431

A. L. Levshin T. B. Yanocskaya A. V. Lander B. G. Bukchin M. P. Barmin L. I. Ratnikova E. N. Its V. I. Keilis‐Borok 1989 Kluwer Acad. Norwell Mass.

10.1046/j.1365-246X.1998.00665.x

10.1046/j.1365-246X.1999.00897.x

10.1029/2000JB900161

10.1023/A:1005205406377

10.1029/2002JB001777

10.1121/1.4808817

10.1016/S0165-2125(96)00021-2

H. Sato M. Fehler 1998 Springer‐Verlag New York

Shapiro N. M., 2002, Monte‐Carlo inversion for a global shear velocity model of the crust and upper mantle, Geophys. J. Int., 51, 88, 10.1046/j.1365-246X.2002.01742.x

10.1126/science.1070015

10.1046/j.1365-246X.2002.01683.x

10.1046/j.1365-246x.1999.00763.x

10.1103/PhysRevLett.91.243904

10.1121/1.387816

10.1103/PhysRevLett.87.134301

10.1121/1.1417528

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Geophysical Research Letters

Tập 31 Số 7

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