Observations of Regional Seismic Discontinuities in the Earth’s Upper Mantle from SS- and PP- precursors

Thuany Costa de Lima, Australian National University, Canberra, ACT, Australia, Lauren Waszek, University of Cambridge, Department of Earth Sciences, Cambridge, United Kingdom, Benoit Tauzin, Laboratoire de Sciences de la Terre, Université de Lyon I, CNRS and Ecole Normale Supérieure de Lyon, UMR5570, Villeurbanne, France, Hrvoje Tkalcic, Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia and Maxim Ballmer, UCL, Dept. of Earth Sciences, London, United Kingdom