Seismic and acoustic waves from the 2022 Hunga Tonga–Hunga Haʻapai eruption recorded by the Yellowstone Seismic Network

Signals recorded at station YDD in Yellowstone National Park from the 2022 Hunga Tonga–Hunga Haʻapai volcanic eruption. The seismometer at YDD recorded both the direct seismic phase (top left) as well as the atmospheric Lamb Wave that coupled to the ground as it propagated (top right).  The infrasound microphone at YDD recorded the atmospheric disturbance from the Lamb wave (bottom right) that arrived in Yellowstone ~9 hours after the eruption.  Seismic waves travel through the earth much faster than sound waves travel through the atmosphere, which explains the long delay in timing between when the two signals were recorded.