Wave-guide effects in subduction zones: Evidence from three-dimensional modeling
Por:
Shapiro N.M., Olsen K.B., Singh S.K.
Publicada:
1 ene 2000
Resumen:
We have simulated seismic wave propagation in models of the subduction zone off the Pacific coast of Mexico using a three-dimensional finite difference method. The results show that a significant part of the energy generated by earthquakes in the subduction zone can be trapped inside a wave-guide generated by the low-velocity material of the accretionary prism. The trapped waves in the simulations appear as long-duration wave-trains that follow the onset of the surface waves, similar to the signature of broadband seismograms recorded by stations along the Pacific coast of Mexico for subduction earthquakes.
Filiaciones:
Shapiro N.M.:
Instituto de Geofísica, Universidad National Autónoma de México, México D.F., Mexico
Olsen K.B.:
Institute for Crustal Studies, University of California at Santa Barbara, United States
Singh S.K.:
Instituto de Geofísica, Universidad National Autónoma de México, México D.F., Mexico
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