Posted on 06/18/2020 8:58:10 PM PDT by BenLurkin
A naturally occurring injection of underground fluids drove a four-year-long earthquake swarm near Cahuilla, California, according to a new seismological study that utilizes advances in earthquake monitoring with a machine-learning algorithm. In contrast to mainshock/aftershock sequences, where a large earthquake is followed by many smaller aftershocks, swarms typically do not have a single standout event.
The Cahuilla swarm, as it is known, is a series of small temblors that occurred between 2016 and 2019 near Mt. San Jacinto in Southern California. To better understand what was causing the shaking, Ross and colleagues from Caltech, the United States Geological Survey (USGS), and the University of Texas at Austin used earthquake-detection algorithms with deep neural networks to produce a highly detailed catalog of more than 22,000 seismic events in the area ranging in magnitude from 0.7 to 4.4.
When compiled, the catalog revealed a complex but narrow fault zone, just 50 meters wide with steep curves when viewed in profile. Plotting those curves, Ross says, was crucial to understanding the reason for the years of regular seismic activity.
Typically, faults are thought to either act as conduits for or barriers to the flow of underground fluids, depending on their orientation to the direction of the flow. While Ross's research supports that generally, he and his colleagues found that the architecture of the fault created complex conditions for underground fluids flowing within it.
The researchers noted the fault zone contained undulating subterranean channels that connected with an underground reservoir of fluid that was initially sealed off from the fault. When that seal broke, fluids were injected into the fault zone and diffused through the channels, triggering earthquakes. This natural injection process was sustained over about four years, the team found.
(Excerpt) Read more at phys.org ...
So the earth was fracking itself?
I have been down that road many times up through 1980’s and I never new their was a town of Cahuilla there. Obviously it was created for the gambling casino.
“This natural injection process was sustained over about four years, the team found.”
NATURAL
Thanks BenLurkin. Roseanna's daddy had a car she loved to drive. Stole the keys one night and took me for a ride.
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A naturally occurring injection of underground fluids drove a four-year-long earthquake swarm near Cahuilla, California, according to a new seismological study that utilizes advances in earthquake monitoring with a machine-learning algorithm. In contrast to mainshock/aftershock sequences, where a large earthquake is followed by many smaller aftershocks, swarms typically do not have a single standout event.
The Cahuilla swarm, as it is known, is a series of small temblors that occurred between 2016 and 2019 near Mt. San Jacinto in Southern California.
When Mineral, VA had a 5.5 EQ in 2011, I felt it at home as a strong shuddering of the room for 15 seconds. I then kept a bowl of water on the table between my TV and my computer where I was following EQ news. Several times I could see little waves form on the surface of the water in the bowl, and sure enough in about 10 minutes the news would report something like a 2 or 2.5 aftershock. In 1957, I was in a 7.5 in Mexico City, and for weeks afterward when I was laying down I would feel little earth shudders a number of times.
That pic is great
For those interested in this topic search “dutchsinse” on YouTube.
Yeah, the headline was disturbing until I discovered exactly what they meant by "natural injection". Initially I thought it was yogurt or similar...
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