Hunting The Wild Vibrotruck

A Munich resident chronicles a citywide seismic survey using geophones and 'vibrotrucks' to map underground water layers for geothermal energy use. The survey involves over 120,000 sample locations across 1,000 km², using frequency-swept vibrations (6-96 Hz) picked up by geophones spaced 20m apart to build a 3D map of subsurface rock layers roughly 3-5km deep. The piece explains how paired vibrotrucks sync in phase via GPS-disciplined clocks to double vibration output, and how the resulting data will guide extended reach drilling for future geothermal plants.

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