Spectrogram and waveform of a possible long-period earthquake in Yellowstone
![Spectrogram and waveform of a possible long-period earthquake in Yellowstone that occurred on August 26, 2021, near Norris Geyser Basin](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/media/images/spec_LP.jpg?itok=i57Nja4U)
Detailed Description
Spectrogram of a possible long-period (LP) earthquake in Yellowstone that occurred on August 26, 2021, near Norris Geyser Basin. The top panel shows a 30-second seismogram recorded at seismic station YHH. The bottom panel shows the spectrogram with energy concentrated in the 1–3 Hz range and lasting for ~15 seconds.
Sources/Usage
Public Domain.