See file: README_VSP_Seismic_Original_Data.txt. Time Lapse VSPs were acquired from 2010 through 2015 to provide information on CO2 plume development. Six 3D VSP surveys were acquired at the IBDP site: two baseline surveys and four monitoring surveys. The contents of this folder "IBDP_3D_VSP_Data_Original_Surveys" reflect data files from the six original surveys. (Note: The VSP data was reprocessed in 2019. One high-resolution image was created by combining the Baseline 2 and Monitor 1 surveys; the final files are located in sepatate folder "IBDP_3D_VSP_Reprocessed" under the "IBDP_Active_Seismic.tar.bz2" data archive file.)