![]() Sources and receivers can be in anywhere within a 3-D grid. Traveltimes (or amplitudes) can be processed to calculate velocities (or attenuation). Presented at SAGEEP 2012, Tucson, AZ, USA, Mar. Sheng-Hsung Hsieh, Chih-Hsin Hu, Chih-Hsien Hsieh, Jen-Kai Huang, Cheng-Yang Yen, Wen -Lung Chi, and Chao-Ming Lin. This display shows questionable locations (velocity 3.0 to 3.6 m/ms, green-yellow) in a dam that suffered earthquake damage in Taiwan 1.ġApplication of Elastic Wave Tomography for Dam Safety. A 3-D display from Tecplot of results calculated by GeoTomCG is shown below. GeoTomCG can export results for display by commercial 2-D and 3-D graphics programs such as Surfer®, Voxler®, Tecplot®, and SlicerDicer®. Then only zones where the velocity is below the cutoff velocity are colored. Low velocity zones inside a 3-D volume can be displayed with a cutoff velocity. User’s suggestions led to the optional color spectrum shown below for quickly highlighting zones of low velocity (red-magenta) in concrete. The investigators reported that the seismic velocities were consistent with results obtained by other geophysical methods. The crosshatch pattern indicates areas with few raypaths. S and R indicate source and receiver positions, respectively. The display below shows calculated seismic velocities from a dam in Taiwan being investigated for earthquake damage 1. GeoTomCG can process and display 2-D and 3-D crosshole or VSP seismic or radar data. Summary instructions in Spanish and English. Instrucciones sumarias en español e inglés.Economical, commercial price $700 ($600 if purchased with TomTime),.Many years of program development guided by processing field data.Elliptical and nonelliptical anisotropy.Versatile methods for using site information for more reliable results.Efficient processing of 2-D and 3-D data.GeoTomCG seismic and GPR tomography software provides:
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