The Eucla-Gawler 2D deep seismic survey L203 consists of one 834 km seismic line, 13GA-EG1. The data acquisition commenced on 28 November 2013, from Haig, WA and continued east along a road/track parallel to the Trans Australian Railway ending at Tarcoola, SA, on 7 February 2014. The reflection seismic data processing used standard processing and included special attention on refraction statics and deconvolution essential for optimal reflection imaging. High fold stacking provided enhanced seismic reflections in regions of no or weak reflectivity at standard fold. For most of the seismic line, the 20 s seismic data provide images of the full depth of the crust through this region.