singing ice in Antartica
[link to www.livescience.com (secure)]
Scientists detected the vibration unexpectedly; they had installed 34 seismic sensors, on the Ross Ice Shelf from 2014 to 2017, to monitor other aspects of ice shelf behavior. But when they reviewed the readings, they noticed that the topmost snow layer was vibrating practically all the time from the active winds that whipped over its uneven surface, causing a seismic hum.
[less than 50%]