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The students each perform a velocity analysis over on a portion of the Viking Graben data that has been presorted into CMP gathers using a shell script called Velan that is written in Unix (bourne or bash) shell language. This procedure involves the hand picking of velocity as a funciton of traveltime on the section (RMS velocities). The students are provided with additional shell scripts that take the results of the velocity analysis and generate interval velocities as a function of depth and time. The students are expected to consider how consistent their velocity analysis is, as well as consider the geological reasonableness of the results. Each student does a normal moveout correction followed by a stack of the seismic data, and maybe a post-stack migration. Typically there will be pathologies in the students' velocity picks that will introduce pathologies. Evaluating those pathologies present opportunities for demonstrating to the students the importance of velocity models, as well as showing the students how to use the pathologies to their advantage. Has minimal/no quantitative component Addresses student misconceptions
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