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