In case you didn't know, I tend to follow the seismic activity at Yellowstone National Park pretty close. There have been rumors recently that the park has been experiencing harmonic earthquake tremors. Let's stick to the facts and understand why this is important.

Let's begin with the USGS definition on what a harmonic tremor is and what it looks like.


Harmonic tremor describes continuous rhythmic earthquakes that can be detected by seismographs. Harmonic tremors often precede or accompany volcanic eruptions.

That's how the USGS defines a harmonic tremor. They are low frequency quakes which can be a precursor to an eruption.

Many who are monitoring the supervolcano at Yellowstone watch the seismographs for the park very closely. There are monitors set up all around the caldera. Some of these graphs have had very weird tremor activity which has caused many to raise the alarm that this shows there could be an imminent eruption.

Ben Ferraiuolo is an amateur seismologist, but one of the more respected on the net for being very methodical in his analysis of Yellowstone. In his video above, he explains that while some of the recent activity is curious, it is not actually the low frequency activity that constitutes a true harmonic earthquake tremor. If you're interested in the superolcano at Yellowstone, it's definitely worth following Ben on YouTube. He's not a sensationalist and does a good job of vetting the info he provides.

The Is This Thing On website is also a good source for seeing the actual seismographs at Yellowstone for yourself. It's hard to trust a lot of outside sources who tend to exaggerate what is happening at Yellowstone for their own web traffic. Best to research for yourself what the Yellowstone supervolcano is up to. There's rarely a dull moment in this very active seismic area.