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Seismo-Blog

Steamboat Geyser erupts again! Strange things about it...

3/11/2019

1 Comment

 
Picture
In this post I am going to quickly talk about the most recent eruption from the time I am writing this. The most recent eruption was the 9th one of 2019 (also the 41st eruption since it reactivated in early-2018). This recent eruption carried the smallest amplitude ever recorded on seismic station YNM, the closest station to Steamboat Geyser. Although the amplitudes were much smaller, it is surprising to note that this eruption put out more water than the previous eruption. As usual, please click the title of this post or "read more" to continue...

Picture
Steamboat geyser in the steam phase of eruption on March 16, 2018, just a day after the first water (hydrothermal) eruption of 2018. Photo taken by Behnaz Hosseini.
First off, if you wish to see my Steamboat Geyser 2019 page, which includes the most recent eruptions, then please go up to the seismic events dropdown menu and click "Steamboat Geyser (2019)". Also, don't forget to check out the 2018 page too!

So Steamboat Geyser erupted again last night. Here are the seismogram, spectrogram, and spectra plots of this eruption:
Picture
Note that this eruption carried the smallest amplitudes ever recorded by seismic station YNM for the Steamboat eruptions. Below is the 3-plot image I generated for the 8th eruption of 2019, the eruption right before last night's:
Picture
Notice the 8th eruption of 2019, shown directly above, was stronger than the 9th eruption of 2019, shown right before. So obviously it was a smaller eruption, right? Well hold on a second. Take a look at the following image. It is of the Tantalus creek stream gauge which can detect the amount of water ejected from the Steamboat eruptions:
Picture
So although the most recent eruption was much smaller in amplitude than the eruption just prior, the stream gauge data from Tantalus creek proves it was not smaller! The 9th eruption put out much more water than the 8th eruption, even though the 9th eruption was smaller. Isn't that strange? Also, as you will see in the slideshow directly below, this 9th eruption was also detected on seismic station YNR which resides to the SE of YNM and Steamboat Geyser. How is that possible if the weaker eruptions never used to show on YNR? What changed? Here, check it out:
So notice how on YNM there was a small burst in the eruption about 12 minutes or so prior to the main eruption burst? Well look at YNR! You can see the same increases in energy at the same exact times on both stations. So YNR definitely did detect this eruption. So how is this possible now when it wasn't before, in regards to eruptions weaker than 15,000 amplitude count? The only difference is that YNM is detecting much lower frequencies than YNR is. This can be seen especially on the spectra and spectrogram plots.

Since these eruptions still carried very low amplitudes, some of the background noise was getting in the way. So, in order to draw out these eruptions only, I decided to add an intricate filter to both plots. As you will see below, I did a pretty good job at drawing out the Steamboat eruption only! Note that YNM has a strong band pass filter of 11Hz to 25Hz. Also, YNR has a high pass filter of 18Hz. Both these settings on both of these 3-plot images will eliminate almost all background noise and will show only the eruptions. As you can see, it was detected on station YNR. But why? Something must have changed.
The U of U webicorders of YNM and YNR. The Steamboat eruption is close to the middle of the chart and is so small it is hard to see. Again, if this eruption was the smallest ever recorded then why did it put out much more water than the last eruption that was stronger? Very odd. Let me know what you think!
1 Comment
Paul Haugan
3/11/2019 10:23:45 pm

Some thoughts...I’ve been noticing darkened steam at Old Faithfull . This has to be from gas and ash intrusion. I think the eruption at Steamboat are for the same reason. Again I will make reference to what I have observed in New Zealand. There is a geyser that erupts on demand to a schedule. If a bus load of tourists are late the eruption will be delayed until the people are comfortably seated in the bleachers. A little over a pound of soap is dumped into the geyser vent and within 5 minutes the show starts. The story told is the geyser is next to an old prison. Inmates were allowed to wash their clothing in the hot springs. Somebody tripped and spilled the soap and the rest is history. This would have been primitive soap made from wood ash and animal fat. Heat reduced minerals in the volcanic gas and ash would cause the same chemical changes to the water as the soap does, basically modifying the surface tension. I think it is interesting Steamboat has taken on a regular schedule but with varying intensity....Paul

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    Ben Ferraiuolo is a fast learner and someone who will always stand for the truth. Visit "About Me" for more!

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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?!