New breakthrough in surface-based groundwater measurement

https://phys.org/news/2021-11-breakthrough-surface-based-groundwater.html

"cleaner signals than have so far been possible using NMR-based (nuclear magnetic resonance) measurements... detailed map of the hydrogeological and geological structure of the subsurface, even in inaccessible areas... cheap, fast and, above all, very accurate... through a number of identical pulses almost 'force' a clear signal from the hydrogen atoms in the soil. The computer can piece together the signal we receive to an accurate reproduction of the original signal using data modeling"