Artifacts of teleseismic body- wave inversion Don L. Anderson.

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Presentation transcript:

Artifacts of teleseismic body- wave inversion Don L. Anderson

A cylinder (a) and a pillbox (b) both give a tent or cone plus rabbit ears when teleseismic body waves are inverted Slowness perturbations Keller et al.

Examples of Rabbit Ear artifacts resulting from use of teleseismic body waves Use of surface waves and regional events can suppress the artifacts Foulger et al. West et al.

Rabbit Ear artifacts result from use of teleseismic body waves Foulger et al. West et al. Wolfe et al. SCIENCE 2009

Rabbit ears artifact Wolfe et al Yellowstone Hawaii Rabbit ear artifacts?

The shallow anomaly is saturated but is about 3 %; the deep one about 0.5 % Test object; 2 % with Gaussian taper over 100- km Result; 1 % with faint rabbit ears Question: what would be the result if the test object were 3 %,with sharp edges?