https://phys.org/news/2018-07-reveals-sand-dunes-seismic.html

When seismologists perform these surveys near sand dunes, however, they notice their signals are not coming through clearly.

"Surveyors have noticed a lot of noise," said Matthew Arran, a Ph.D. student in the Department of Applied Maths and Theoretical Physics at the University of Cambridge in the United Kingdom. "Sometimes you really can't read anything … So we are asking, what is this sand dune noise and can we do anything to avoid it."