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South American event

Direct Detection of Sharp U pper-Mantle Structures Beneath the Western United States Using Waveform Complexity Analysis. South American event. Complexity ( D LR ). Amplitude. Data-Synth ( D T ).

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South American event

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  1. Direct Detection of Sharp Upper-Mantle Structures Beneath the Western United States Using Waveform Complexity Analysis South American event Complexity (DLR) Amplitude Data-Synth (DT) • Many TA waveforms exhibit significant complexity (ΔLR) that can be described by a multi-pathingeffect • Larger ΔLR values = more complex waveform • Large ΔLR values are associated with low amplitudes. • Azimuthal dependence in ΔLRis observed, suggesting that the anomalies in the upper-mantle beneath western US mainly dip to the south. Kamchatka event • [Sun and Helmberger, 2011, GJI]

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