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Spectrogram and waveform of a volcano-tectonic (VT) earthquake in Yellowstone

February 2022 (approx.)

Detailed Description

Spectrogram of a typical volcano-tectonic (VT) earthquake that occurred near Norris Geyser Basin, in the same region similar depth as the possible long-period (LP) event that was recorded on August 26, 2021.  The top panel shows a 30-second seismogram recorded at seismic station YHH.  The bottom panel shows the spectrogram with energy ranging from 1-15 Hz and lasting for ~5 seconds.


Public Domain.