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Hum of American rock arches probed

Scientists are listening to the hum of America's great rock arches to keep a check on their integrity.

These geological wonders adorn the Colorado Plateau in the southwestern US - not to mention the desktop wallpapers of countless computers worldwide.

By attaching seismometers to the sandstone structures, researchers can measure their modes of resonance.

Dr Jeff Moore from the University of Utah described the work to our correspondent Jonathan Amos.

  • 18 Dec 2014