The Caribbean Anomaly: Short-wavelength lateral heterogeneity in the lower mantle

@inproceedings{Bokelmann1993TheCA,
  title={The Caribbean Anomaly: Short-wavelength lateral heterogeneity in the lower mantle},
  author={G{\"o}tz H. R. Bokelmann and Paul G. Silver},
  year={1993}
}
Data from the Archean-Proterozoic Transect Experiment 1989 (APT89) are used to constrain smaller-scale velocity heterogeneity in the lower mantle beneath the Caribbean. We observe large variations in travel time residuals for paths from South America to portable broadband and short-period stations distributed along a 1500km-long transect in central North America. After accounting for near-source and near-reciever contributions, we find variations as large as 3s for P and 8s for S for rays that… CONTINUE READING