Directly above are the helicorders of this swarm from 10 of the closest seismic stations.
From 5:29UTC to 5:46UTC, January 6, 2019 (10:29pm to 10:46pm Mountain Time, January 5, 2019), a large magnitude swarm broke out just NNE of Yellowstone Lake (striking just a couple miles south of Amethyst Mountain). The largest reported event was a magnitude 2.8 at 8.8km in depth and a M2.8 at 6.9km in depth, but I believe the deeper M2.8 earthquake was more likely to be a M3.3. So far, 8 earthquakes have been reported which is not too bad considering there were ~15 events for the whole swarm.
Using the program WAVES, along with data acquired from multiple surrounding stations, there were ~15 earthquakes within that 17-minute time frame. Remember whenever you see "~", that means "approximate" or "about". Most of the seismicity occurred around M1.5-M2.8, within ~7 minutes. The location of this swarm, shown below, was an extremely odd location for a swarm. This was another rapid fire swarm but, to the best of my knowledge, rapid fire swarms of this magnitude or quantity have never struck this area.
Below are the seismic plots and some brief information on this event. Remember to always pay attention to chart labels first, especially when dealing with separate plots. That is because the time period for each different 3-plot image is slightly different than the others (at times). Remember, if you keep the size of a chart the same, but increase the amount of data shown within that chart, it will show less and less detail. Also pay attention to any captions beneath any images. All images were generated by myself using data obtained from IRIS or USGS, using the program SWARM and WAVES.
Waveforms (via WAVES)
If you wish to see the video I made where I analyzed these events, please CLICK HERE or watch it below.
Please click a post title to view the data pertaining to that event!