Tharsis Seismic Volume

The Tharsis Seismic Volume is the largest active-source seismic survey ever shot on Mars. Over two seasons, crews towed the Thumper Seismic Mapper across 1,600 square kilometres of the Tharsis flank, imaging the basalt pile down to 6 kilometres.

The release contains the full 3D reflection volume, a velocity model calibrated against Corehound core and interpreted picks for all nineteen carbonatite dykes that make up the Tharsis Dysprosium Dykes target. Interpreters can load it in any standard seismic package; the repository includes format notes and a viewer.

Because the licence for the deposit is still pending, the data is restricted to Guild members until 2189, after which it will be released openly. Members request access through the forge with their guild number.

Sunniva Okafor's processing team reprocessed the whole volume in 2187 with a new velocity model, sharpening the dyke images and cutting depth uncertainty to about 20 metres. Members use the volume to plan drill pads, and the Guild's apprentice programme uses smaller extracts to teach seismic interpretation. When the restriction lifts in 2189 the full dataset will be released under CC-BY-4.0.