Sandstone Arches and National Parks: Testing for Collapse Likelihood

Things are humming right along at Arches National Park.

That is, scientists who wondered about possible internal damage in the 88-foot-long Mesa Arch at Canyonlands National Park-one of more than 2,000 sandstone arches in two national parks in that part of Utah–now have an answer. They learned by employing seismometers to hear the arches’ natural humming, then monitored the sounds for telling changes. Their report was recently accepted for publication in the journal Geophysical Research Letters.