Continuous infrasound (low-frequency acoustic) monitoring is now established in Yellowstone. And the method is detecting activity that goes well beyond geyser eruptions... Today's #Yellowstone #CalderaChronicles is out of this world! https://www.usgs.gov/observatories/yvo/news/listening-hydrothermal-activity-and-more-yellowstone Infrasound refers to low-frequency acoustic energy. For the audio enthusiasts out there, the specific frequency range of interest is 0.1–20 Hz, which is below the range

Sound adds another layer to how we can understand earthquakes. Just like we can pick out the different instruments in an orchestra, we can learn to recognize the distinct “voices” of seismic events. | EarthScope Consortium