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Earthquake Swarms

February 7, 2019 Swarm Strikes East of L.A. in Cali! Right next to Pisgah Crater and Lavic Volcanic Field!

2/10/2019

4 Comments

 
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Welcome to the first post on another new page just recently added to my website! This first post will deal with a very energetic, rapid fire swarm that struck east of Los Angeles on February 7, 2019. This swarm seems to be similar to the ones seen at West Thumb Lake in Yellowstone from time to time (CLICK HERE for that). This swarm also occurred very close to Lavic Volcanic Field and the Pisgah Cinder Cone. As usual, please click the title of this post or "read more" to continue...

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First off, the image first posted (in the intro) shows the location and some information about Lavic Lake Volcanic Field. You can see I also marked where the swarm occurred. The image directly above shows the location of the earthquake swarm in regards to the 2 closest seismic stations and the Pisgah Crater Volcano (cinder cone). This whole area still is potentially volcanic and most likely will see another eruption someday. However it is likely the eruptions in this area will be of traditional lava flows. Although tephra and ash have the possibility of being ejected, lava effusion is the most likely outcome.

The data and info in this post pertains to the events that transpired just to the east of Pisgah Crater in California from 00:00UTC February 7, 2019 to 5:26UTC February 8, 2019. The swarm saw 63 reported earthquakes during the time period just stated. A few others occurred after this time period, but it seems the swarm is calming. However another update will be issued if another swarm occurs in this area.

Now this swarm in question occurred just east of the Pisgah Cinder Cone and Lavic Lake Volcanic Field (intro image). Please CLICK HERE if you wish to learn more about Lavic Lake and CLICK HERE to learn more about specifically Pisgah Cinder Cone. Also, please CLICK HERE if you wish to visit the USGS EQ map detailing all reported events that occurred within the location and time period stated above.

This interesting earthquake swarm carried a good amount of energy and can be characterized, during many moments, to be a rapid fire swarm, much like what is seen around West Thumb Lake at Yellowstone from time to time. This rapid fire swarm seems to be more within the lines of a small intrusion of magma, but do not hold me to that. It is possible this was tectonic, but the characteristics of the swarm, including how fast the events occurred, point out that this was most likely some type of rock breaking event. Of course hydrothermal activity could do this as well, however magma is a more likely culprit for this area (as is tectonic activity).

First, there was a small burst in seismicity lasting 4 minutes that contained 4 micro-quakes at about 1:04UTC Feb. 7. Then another episode of seismicity occurred from 7:16UTC to 9:55UTC on Feb 7 that included a total of approximately 55 earthquakes. Then, the main burst of seismicity started at about 14:16UTC and lasted until 20:44UTC, on Feb 7 as well. The total for the main burst, including events too small to be reported, was around 190 earthquakes of all sizes. The rest of the seismicity from 20:44UTC Feb 7 to 5:26UTC Feb 8 contained around 80 earthquakes of all sizes. Many of the events occurred in pairs and episodes, instead of stretched out over a period of time. Again, this earthquake swarm is categorized as a rapid fire swarm.

Altogether, for the entire time period stated at the beginning of this post, approximately 329 earthquakes occurred with only 63 of them being reported! Many were most likely not reported due to the lack of strong amplitudes and the lack of a dense seismic array of stations. The estimation above may be off just a tad, I wouldn't be surprised, but it is pretty close! Again I used data from surrounding stations in the program WAVES to cross correlate P wave arrivals.

Below I will show alot of data in regards to this swarm. I will first show the helicorders for the 2 closest seismic stations and will put them in slideshow format: NBS and RAG, both in the CI network within the SCEDC database. Then I will show the USGS event page and 3-plot image of the largest earthquake within the swarm. Afterwards I will show a strange low frequency event, the 3-plot images to the fastest parts of the swarm, and the rest of the seismic plots will be shown in slideshow format (in 2 slideshows) at the bottom of the post. Remember I am not able to show you ever single event within the plots below. However I will try my best to show most of them! The last 2 slideshows at the bottom of the post contain 24 3-plot images.

Remember to always pay attention to chart labels and any captions beneath any images!
Picture
The USGS event page of the largest earthquake to occur during this swarm. The felt reports are likely much higher by now, seeing this image was saved very early on.
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The seismogram, spectrogram, spectra plots of the largest earthquake to occur within this swarm. This M4.0 was NOT a low frequency earthquake, but did contain dominant frequencies lower than what you would expect!
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Now this event caught my eye right off the bat! This event was labeled by USGS as a M1.9 "Quarry Blast". I admit it looks similar, and just might be a quarry blast, however the fact that this occurred right during this swarm and carries the same characteristics as a low frequency earthquake has me thinking.......... Maybe this was a low frequency earthquake! Who knows. However it is my solid belief the swarm of February 7, 2019 was not tectonic in nature. So it wouldn't be that much of a stretch!
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This seems to be the most energetic part of the Feb. 7, 2019 swarm near Pisgah Crater. Although it may not seem like it, upon closer examination you find out the amount of earthquakes within this one 3-plot image numbers around 100 (all quakes of all sizes)!
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This was the last major burst of seismicity for this swarm, at least for the time period stated in the beginning of this post. Within this 3-plot image and the one just previously shown, you can find some of these events within the 3-plot image slideshow below. Just remember to pay attentiont to the times! All are in UTC! This was definitely a very intriguing swarm! And one we see from time to time at Yellowstone.
4 Comments
Jane Ford
2/13/2019 12:55:16 pm

I think this is good coverage. I wonder what it means, though. This has happened before, in the same place. Like I said in my comment, the military more or less shut Dutchsinse down when he first started pointing out the plumes in this area. What do you think?

Reply
Ben
2/13/2019 10:10:00 pm

Hey there! thank you for stopping by. I think sightings of plumes by satellite imagery is far less important than actual seismic data, since any vibration caused by any plumes would surely be detected by seismic stations in the area. Now I don't like to step on any toes here, and I like some of the work Dutch does, but I think he is lying or at least not being entirely truthful with the censoring of his work.

You know, maybe it really is happening. I dont want to say it isnt, just in case it really is. However I analyze and dig deep into the vibrations put off by many events and I have never been shutdown or even been close to being silenced. Idk if that means he is lying, but if the military or the government (usually one in the same) wants to shut me down, I would have been shut down already. I pray for Dutch and I do hope he becomes more humble in his research. It really would do him ALOT of good if he just ignored the naysayers (unless of course they are hacking him, which is possible). Just remember humans can lie, even believable ones, but data cannot (unless the stations are offline lol). I try not to believe everything I come across, but then again something someday will seem unbelievable but will be extremely true. Listen to everything, test everything, do not deny anything immediately and you are on the road to success. If the government can lie openly, so can the civilians. God bless!

Reply
Jane Ford
2/14/2019 02:37:22 am

Thanks. I don't know if Dutch is lying or not. I know his original videos are no longer available, and that he changed his channel. Anyway, I remember when he published about the plumes. That's what I am interested in. I wish I knew what is happening underground there. :D

Ben
2/14/2019 10:42:52 pm

Well I dont know if Dutch is lying either. However nobody actually lies 100%, unless they are a compulsive liar (which Dutch is not). But still, some things I think he exaggerates. But the plumes could have been real, but no major seismic activity was detected during that time period so idk.

You can always know what is going on underneath any given location, as long as there are stations nearby. My website here can help you if you want to learn how to very quickly find the site of interest, find the closest seismic stations, and download the data to analyze. I suggest downloading the program SWARM and then going to the "How To" dropdown menu here on my site. Once hovering over it, check out the pages about how to use swarm, how to find seismic data, and seismic archive. Hope this helps! Finding, downloading, and analyzing seismic data is much quicker than most people think! God bless

Reply



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    This blog page is solely for interesting earthquake swarms that occur in locations other than the ones I already have posted. Pretty much any earthquake swarm I am interested in, that cannot be placed on other pages, will be placed here. Please click the title of each post or "read more" to view each swarm.

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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?!