From Superinnovators 27/03/24
German tunnel boring machine manufacturer Herrenknecht AG and Geophysical Institute of the Karlsruhe Institute of Technology (KIT) are building Urban Vibro Trucks that produce seismic waves to search for geothermal energy sources in urban areas.
More info:
https://www.herrenknecht.com/en/products/productdetail/urban-vibro-truck/