Shear wave travel time, amplitude, and waveform analysis for earthquakes in the kurile slab: Constraints on deep slab structure and mantle heterogeneity

Author:

Schwartz, Susan Y.   Lay, Thorne   Beck, Susan L.  

Journal:

Journal of Geophysical Research

Issue Date:

1991

Abstract(summary):

Shear wave travel times, amplitudes and broadband waveforms from 16 events in the Kurile slab are analyzed to place further constraints on the seismic velocity heterogeneity associated with the subducted oceanic lithosphere. Several previous studies have proposed that the Kurile slab penetrates into the lower mantle with little deformation other than a steepening of the dip angle, while other studies suggest that strong slab deformations occur with perhaps negligible lower mantle penetration. In an effort to detect any deep slab effects, the authors compare anomaly patterns covering a 60deg azimuthal range straddling the strike of the slab for events in three different depth intervals (>500 km, 350-500 km, and 100-200 km)

Page:

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