Crustal structure across the Costa Rican Volcanic Arc Jorden L. Hayes1; W. Steven Holbrook1; Dan Lizarralde2; Harm J.A. van Avendonk3; Andrew D. Bullock4; Mauricio Mora5; Steven Harder6; Guillermo E. Alvarado5,7; Carlos Ramírez5 1University of Wyoming, Department of Geology and Geophysics, Laramie, WY 82071, USA. E-mail: jhayes18@uwyo.edu 2Woods Hole Oceanographic Institution, Department of Geology and Geophysics, Woods Hole, MA 02543, USA 3University of Texas Institute for Geophysics, Jackson School of Geosciences, Austin, TX 78722, USA 4WesternGeco Ltd, Schlumberger House, Gatwick Airport, RH6 0NZ, UK 5Escuela Centroamericana de Geologiá, University of Costa Rica, San Pedro 214-2060, Costa Rica 6University of Texas at El Paso, Department of Geological Sciences, El Paso, TX 79968, USA 7Instituto Cstarricense de Electricidad, San José 10032-1000, Costa Rica Auxiliary Materials for Paper 2012GC004493 Crustal structure across the Costa Rican Volcanic Arc This data set contains shot gathers for 20 explosive sources as recorded by 742 vertical geophones described in further detail in the paper. The following includes plots for each shot gather and the interpreted travel-time picks for each gather are also plotted.