There is natural infrasound in the Front Range, caused by winds somewhere in the vicinity of Long's Peak: https://journals.ametsoc.org/doi/abs/10.1175/1520-045

There is natural infrasound in the Front Range, caused by winds somewhere in the vicinity of Long's Peak: https://journals.ametsoc.org/doi/abs/10.1175/1520-0450%281978%29017%3C1014%3AIONMRI%3E2.0.CO%3B2 https://journals.ametsoc.org/doi/abs/10.1175/1520-0450%28197...