3D S-wave High-Resolution Seismic Survey

Nyírád Deákipuszta area in the western edge of the Bakony-mountains was one of the bauxite mining areas in Hungary. Underground mining activity also included very strong groundwater deepening. After closing the mining activities and rising back the groundwater level many of the mined blocks collapsed and closed surface movements. These surface movements can be still dangerous, therefore reliable and detailed geotechnical data are required for planning. High-resolution seismic survey can provide very important information and data for the required geotechnical planning and calculation. 2D P-and S-wave seismic survey measured over a previous mining block with ongoing surface movements provided very reliable survey results for planning of surface infrastructure. In addition a 3D S-wave seismic survey was carried out over the most important area for future constructions. Seismic mapping of the topmost layers could be completed very effectively using Lightning electronic vibroseis source and STRYDE receivers for S-wave recording. Preliminary results of the 3D seismic measurement shows detailed tectonic and sedimentary information, but no additional subsurface deformation due to the historical mining activity.