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Regional Distance PL Phase in the Crustal Waveguide - An Analog to the Teleseismic W Phase in the Upper‐Mantle Waveguide

Furumura, Takahashi; Kennett, Brian


Dense strong ground motion observations of the shallow Mw 6.6 2004 Mid‐Niigata earthquake, Japan, show a strong, moderately long‐period disturbance (5–20 s) immediately following P. The associated ground motion is as large or larger as that in the S waves and surface waves. The nature of this PL phase is revealed with the aid of 3‐D finite difference simulations for heterogeneous crust and mantle structures. A strong near‐field contribution at the nearest stations grades into an interference...[Show more]

CollectionsANU Research Publications
Date published: 2018
Type: Journal article
Source: Journal of Geophysical Research: Solid Earth
DOI: 10.1029/2018JB015717
Access Rights: Open Access


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