Scatter and bias in differential PKP travel times and implications for mantle and core phenomena

Details Scatter and bias in differential PKP travel times and implications for mantle and core phenomena Scatter and bias in differential PKP travel times and implications for mantle and core phenomena

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.2167h&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 19, p. 2167-2170

Other

13

Anomalies, Bias, Distance, Earth Core, Earth Mantle, Mathematical Models, Plates (Tectonics), Subduction (Geology), Wave Propagation

Scientific paper

Differential travel times, commonly used to eliminate unwanted near-source and near-receiver heterogeneity from travel time studies, can be affected by slabs and hypocentral errors when phase pair slownesses differ greatly. In particular, D double prime and core structure studies can be biased if differential PKP times are used. Here we present differential PKP travel time measurements having significant azimuthal travel time anomalies consistent both in size and pattern with a near-source slab effect and explore other sources of error in differential times.

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