Nov 19, 2021
Earth Surface Dynamics

Vibration of natural rock arches and towers excited by helicopter sourced infrasound Riley Finnegan, Jeffrey R. Moore, and Paul R. Geimer Earth Surf. Dynam., 9, 1459–1479, https://doi.org/10.5194/esurf 9 1459 2021, 2021 We performed controlled helicopter flights near seven rock arches and towers in Utah, USA, and recorded how their natural vibrations changed as the helicopter performed different maneuvers. We found that arches and towers vibrate up to 1000 times faster during these flights compared to time periods just before the helicopter"s approach. Our study provides data that can be used to predict long term damage to culturally significant rock features from sustained helicopter flights over time.

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