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Yellowstone Caldera, WY

Nov. 2019 - Two Small Energetic Swarms and a Strange Event

12/4/2019

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Yellowstone has been fairly quiet in past months. However, there were 2 minor rapid-fire swarms in November 2019 along with a strange event I cannot wrap my head around. Please click the title of this post or "read more" to continue...

Strange Event

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After the small rapid-fire swarm on November 25, 2019, there was a strange event that appeared on seismic stations across the NW quadrant of Yellowstone National Park on the 26th. It was extremely strange. However, I have seen this type of event before and still am clueless as to what could cause it.

It is travels too slowly to be seismic in nature but also seems to travel too fast to be related to any surface activity. These events have mid-range frequencies but most power is kept below 10Hz. I like to keep track of these events, since they are odd, so here is a quick outlook on these events.

The first event was smaller than the second and can be seen below, using the closest seismic stations I could find.
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Here are the second set of events that occurred soon after:
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Nov. 25 Rapid-Fire Swarm

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On November 25, 2019 there was a rapid-fire swarm just a couple kilometers south of Mary Lake. It was minor, but still did occur. The swarm started at 20:10UTC and lasted only 9 minutes. However, approximately 25 micro-quakes struck within those 9 minutes. Only 8 earthquakes were reliably located with the largest being a M1.1 event at 6.1km in depth.

CLICK HERE for the USGS EQ map for reported events of this swarm. Below are helicorder and seismic plots of this swarm.
Below is the seismic audio to this swarm. All audio is retrieved from IRIS and this audio has been sped up to allow us to hear it. The speed is 8,200 samples per second. Headphones are suggested, but be wary of how loud it gets.

November 30 Rapid-Fire Swarm

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On November 30, 2019, a rapid-fire swarm broke out along an east-west zone along the central shores of West Thumb Lake at Yellowstone. Swarms like these are common and have occurred many times in the past. Proof of this can be shown if you CLICK HERE.

The swarm started at about 08:09UTC on the 30th and lasted approximately 36 minutes. The two main bursts of the swarm, since it was very energetic, were 08:09UTC to 08:27UTC and 08:36UTC to 08:38UTC. For whole swarm there were approximately 75 earthquakes with many being too small and too emergent to be located. Regardless, 11 were reliably located with the largest being M2.1 at 3.7km depth. CLICK HERE for the USGS EQ map of reported events for this swarm.

Below are helicorder and seismic plots of this swarm.
Below is the seismic audio to this swarm. All audio is retrieved from IRIS and this audio has been sped up to allow us to hear it. The speed is 8,200 samples per second. Headphones are suggested, but be wary of how loud it gets.
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    About

    Please click a post title to view the data pertaining to that event!

    This is the seismic events page for Yellowstone National Park and Caldera, which resides in northwest Wyoming. Yellowstone is an absolutely massive caldera super-volcano. It sits at a shocking perimeter of 34 by 45 miles (55 by 72km) and that is only the caldera boundary! A caldera is created when land immediately erupts and collapses, while the magma chamber almost completely empties, creating a crater imprint called a caldera. Some calderas around the world are small in comparison (i.e. Kilauea) to other calderas formed by super-volcanic eruptions (i.e. Yellowstone in Wyoming or Long Valley in California).  Yellowstone is theorized to contain a magma chamber and a much deeper, much larger magma reservoir just beneath the chamber. This two-chamber system is also theorized to be caused by a "magma plume". Magma plumes are thought to draw their eruptive ability from deep within our planet, possibly from our lower mantle. That is why volcanoes caused by magma plumes are much more dangerous and far more unpredictable than their counterparts that are caused by normal tectonic forces. Yes, many volcanoes are caused by tectonic forces as one plate attempts to breach or dip beneath another one. A perfect example of this is the Cascade Range on the West Coast of the United States. Many volcanoes in the world are caused by this but some, the more unpredicatble ones, are caused by magma plumes.

    Remember to always pay attention to all chart labels! All images were generated by myself using the IRIS DMC seismic archive and the FREE seismic program S.W.A.R.M.

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  • Home
  • Yellowstone
    • Yellowstone Blog
    • 2008-2009 Yellowstone Lake Dike Intrusion
    • Rapid-Fire Swarms 2014-2018
    • Steamboat Geyser Eruptions >
      • Steamboat Eruptions 2020
      • Steamboat Eruptions 2019
      • Steamboat Eruptions 2018
  • Hawaii
    • Hawaii Blog
    • Hawaii Spasmodic Tremor
    • 2018 Kilauea-LERZ Eruptions
  • How To...
    • ...Retrieve Seismic Data
    • ...read webicorders/helicorders and seismic plots
    • ...Understand Spectrograms
    • ...USE SWARM Software
    • ...use jamaseis program
    • ...use waves program
    • ...understand UTC
    • ...Read/Create GPS Deformation Charts
    • ...use s.w.a.r.m. program (OLD)
  • Seismic Events
    • Event Examples
    • Exotic Events
    • Whale Calls
    • Cascade Volcanoes' Low Frequency Events
  • Seismo-Blog
  • Other Seismic Blogs
    • Quake Swarms
    • United States
    • East Coast, USA
    • World
  • Monthly Volcano Updates
  • Uplift/Subsidence Update
  • Videos/Multimedia
    • Newberry Videos
    • (OLD) 2019 Monthly/Yearly Updates
  • Seismic Software
    • jAmaSeis
    • SWARM
    • WAVES
  • Seismic Network Help
  • Links
  • About Me
  • Contact
  • Test Your Knowledge!
  • Lucas Andrew Ferraiuolo (Pro Pics)
  • Garbage Trucks?!