The human brain [is] a station on the radio dial; parked in one spot, it is deaf to all the other stations… the animals, rocks, trees, simultaneously broadcasting across the whole spectrum of sentience. Dr. Leroy Little Bear https://albertaviews.ca/listening-to-stones/

Geophone construction is underway by the wonderful Josh Harles of Tactical Space Lab A geophone is a device that converts ground movement (velocity) into voltage. This one will be able to detect low frequencies, around 10Hz and convert that to data.