Earthquake Swarm at Yellowstone Supervolcano Second Longest Ever Recorded

Over the past 3½ months, almost 2,500 earthquakes have been recorded in Yellowstone National Park.

The ongoing earthquake swarm, which started on June 12, now rivals a swarm in 1987, the longest swarm ever recorded at the massive supervolcano. During that swarm, more than 3,000 earthquakes struck the area in three months.

But don’t worry. “The swarm in no way signals an impending eruption,” reports

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Thanks to Vance von Raab and Gordon Broussard for this link

8 thoughts on “Earthquake Swarm at Yellowstone Supervolcano Second Longest Ever Recorded

  1. That’s surprising, there have been some other impressive swarms at other locations in the Park more recently than 1987, this one appears to have wound down, I didn’t see much in the way of activity at all a week or more ago, now it’s picked up slightly, maybe not quite quiescent enough where I’d call it background levels. Right now, like I mentioned, it appears the higher magnitude swarm is near the Southeast Idaho, Utah border. It’s outside of the usual monitoring range, so I can’t say how recent it is, and whether the quakes outside the monitoring area refresh and drop off after a week or so, meaning I can’t comment on how recent it would be, it’s somewhat uncommon. What’s equally strange someone said, was the lack of aftershocks after the Mexico City vicinity quake. Equally weird if you ask me. Haven’t watched it close enough to say there weren’t any. Anyway, I’m not going to repeat myself here about Yellowstone activity, however it’s not exactly quiescent in some other ways, though I couldn’t comment on the activity at all in areas that I don’t frequent at all lately this year. I don’t mind seeing the swarms wind down, however. There have been others at various locations around the states the last few years.

  2. Link into the swarms the quake activity in Iowa and the recent discovery of the total extant of the lava bed, could one entertain the thought that the entire expansion plate is shifting east?
    Just some passing thoughts I had experienced with some geologist years prior?

    Hum, geyser eruptions in South and North Dakota?

    Good Day

  3. Rock fracture events are pretty common when it comes to seismic events The real problem is when you start to see type B or resonance events. These indicate magma injection and pressurization. I learned about this from the BBC documentary called Volcano Hell on youtube. It may be difficult to find the video.

  4. I heard that the swarms are being caused by earthwuake pressure coming in from the Pacific Northwest and pushing on the Magma chamber. It’s an interesting thought.

    • That makes sense. It is my understanding that the subducting Juan de Fuca plate (which is what is left of the much-bigger Farallon plate) has a really shallow angle of subduction so that slab could well be interacting locally with the Yellowstone system.

  5. Swarms of earthquakes there … a natural way to ease pressure on an on going basis (?) … in which case, preferred … i.e., to there being no swarms?

  6. soda springs in idaho has only had a few days without shakes still
    so yellowstone might mellow out but other spots havent

  7. I’m with USGS on this (and unlike the “climate change” guys, geologists tend to be very serious and honest about the science they do, to my experience).

    No reason to assume swarms will lead to a major earthquake, they very often do the opposite, by releasing pressure on the system. It is a seismic gap (long period with no seismic activity in a place that has active faults and is highly seismic) that would worry me more.

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