Seismic signal of an icequake on Yellowstone Lake from January 24, 2022.

Signals from a suspected icequake that occurred on Yellowstone Lake recorded at Yellowstone Seismic Network stations YLA on Lake Butte (top) and YTP at The Promontory (bottom 3 plots). Plot shows about 2 minutes of data from January 24, 2022, starting at about 7:43:34 p.m. MST.  YLA waveform (YLA EHZ) was recorded on a vertical short-period sensor.  YTP waveforms were recorded by a broadband sensor, including east-west (YTP HHE), north-south (YTP HHN) and vertical (YTP HHZ) components.