Utah Geological has a 3-D representation of todays Earthquake and after shocks.
https://twitter.com/utahgeological/status/1240427467501981698?ref_src=twsrc%5Etfw%7Ctwcamp%5Eembeddedtimeline%7Ctwterm%5Eprofile%3Autahgeological&ref_url=https%3A%2F%2Fgeology.utah.gov%2F5-7-magnitude-earthquake-hits-utah%2F
Thanks, Blue Strreak. I noticed a very light, brief aftershock not long after the main event, and a heavier one which lasted a few seconds in the afternoon.
Johnny
Johnny: That 3d picture certainly explained aftershocks much better than I had ever seen before. That may also allow the exxperts to better understand quakes and after shocks. Maybe aftershocks can be predicted some time in the future from these kinds of pictures ? This speeds up the time that can be important just after a quake.
I would opine that the ability to predict aftershocks would be much more difficult than predicting the quake itself. As I understand quakes, they occur when the two plates sliding past each other get hung up on an irregularity. The bigger the irregularity, the bigger the shock when it lets go.
I believe that seismologists are learning to recognize that pent-up energy and thus be able to forecast a major quake. Occasionally there will be pre-shocks, foretelling something bigger coming, and we know there are almost always aftershocks.
Going forward with that thought, the aftershocks are simply smaller irregularities found when the big shock let go.
What I don't believe we have, except as history, is knowledge of the irregularities. If we did, we could see a "big one" coming well ahead of time. Given the quake activity often attributed to fracking, it follows that we might even learn to do a "controlled release" of the tension.
My two cents...
Edit - sign of the times: If you scroll down the linked page, you'll see someone commenting that all Utah refineries are up and running - there is no need for a run on gas...
Larry Resident Microferroequinologist (at least at my house) Everyone goes home; Safety begins with you My Opinion. Standard Disclaimers Apply. No Expiration Date Come ride the rails with me! There's one thing about humility - the moment you think you've got it, you've lost it...
Yes, as to the refineries, they are all north of Salt Lake CIty proper.
I am just south of the foothills on the north, and thus well north of the slip as well as much farhter east of the slip--however, I am not far removed from the Wasatch Fault itself.
Earthquakes are to be expected here. In the not distant past (since I moved here), both the Statehouse and the building which houses many city offices had their foundations reinforced. I do not doubt that the county office buildings (built since I arrived) have state of the art foundations.
My daughter who lives in the Avenues (north of here) told me that there are some cracks in the foundation of the house where she and her daughters live. Since she rents, her landlord has the worries as to repair. The Avenues is a hilly sectin; I have no idea as to how the Wasatch Fault runs in respect to that area.
I noticed that the epicenter was between Kennicot mine and the Great Salt Lake. A couple of other contributions might be subsidence caused by sediment deposition and salt build up in the lake basin, or rebound caused by removal of rock mass at Kennicot. Although the depth of the quake was not that deep, it seems a little deep for surface effects.
Noticed that the epicenter was shown as being 7.5 miles deep in the crust - not very deep in comparison to many of the more serious quakes that tend to originate 25-30-40 miles deep.
Never too old to have a happy childhood!
From the Northern Miner Press:
Rio Tinto (NYSE: RIO; LSE: RIO) evacuated all of its employees from its Kennecott copper mine near Salt Lake City, Utah, after a 5.7 magnitude earthquake hit near the town of Magna.
2020 just continues on with its hellish nightmare doings!
[quote user="blue streak 1"]
[/quote Any news about affects on the UP embankment across the Great Salt Lake.
Dining car, I have not yet seen anything about the causeway. There was concern about the TRAX tracks, but apparently there was little, if any damage there. I do not recall anything about the Front Runner and its track.
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