We just had another shaker in SLC (Salt Lake City, UT)

[defacto7]

Last edited Mon Mar 23, 2020, 12:30 AM - Edit history (1)

Not big but we got out of the house. Only 4.1 but it rolled us around a bit. Another aftershock I guess. It felt like more than that but I guess it's hard to tell. Our 5.7 the other day didn't seem as bad as the 5.1 in Europe today.

[malaise]

1. Earlier today I was wondering what would happen here if we had an earthquake

in the middle of this virus and them I remembered that hurricane season is only three months away

[defacto7]

5. I'll take the earthquake over a hurricane any day.

I would think a hurricane would be a considerable issue during a pandemic.

[malaise]

7. Depends on the intensity of the quake or the Category of the hurricane

All things being equal I'll take the hurricane - we always get advanced notice.

[defacto7]

9. Ah... that makes sense. No anticipation with a quake.

Just... Hello! There it is.

[malaise]

12. Stay safe

[defacto7]

14. Thank you, malaise. You too.

[Demovictory9]

22. yep. I experienced the northridge quake. extremely violent.

[defacto7]

30. That must have been some ride.

[BigmanPigman]

2. Earthquakes are really weird.

Sometimes I feel them when they are far away but not when they are closer. There was one at 3 PM after my students had already gone home and I felt what seemed like an airplane dropping on the roof of my classroom. Glad the kids weren't there. It didn't roll or shake it was just a BOOM!

[defacto7]

8. The one we had the other day was like two booms

then a rolling roar. The two booms bounced my son and I up on the floor a little.

[OhNo-Really]

3. I felt it! I thought it was vertigo.

https://earthquake.usgs.gov/earthquakes/map/

Here’s an interactive link for earthquakes. Tonight’s is the orange balloon

https://earthquaketrack.com/r/utah/recent


It was a weird sensation. Different than the bigger one last week.

✨✨🙏✨✨

[defacto7]

6. It seemed like two.

First a shake then it rolled and then another big shake then a roll. The 5.7 the other day was like two big booms in a row then a rolling roar.. sort of.

[OhNo-Really]

10. Im on the outskirts of the impact. Check

Links I posted. The second is interactive

My nerves are on edge. Can’t imagine how ppl nearer are feeling. All those children afraid to sleep 😢😢😢

Then the thought of the caged immigration children. 😭😭😭

Sorry.

[defacto7]

15. We're in that red zone.

Those poor children. That's worse than any earthquake.

[OhNo-Really]

17. I'm just outside the orange area.

✨✨🙏✨✨

[magicarpet]

4. When it rains it pours.

Could we take a break for a breather ?

[defacto7]

16. Agreed

[Stuart G]

11. SLC...is Salt Lake City, Utah.. for those who do not know ...SLC

[defacto7]

13. Ah yes... writing too quickly here.

[2naSalit]

18. There are different types of quakes

so even though they may register as a high magnitude in some cases and not feel like much depends on which kind. Some feel like the ground is rolling in a wave under you like passing a long rod under a carpet; some feel like that part of the planet is jumping up and down without regard to what's on the surface; some can feel like the ground is moving sideways.

The kind of quake depends on what kind of fault is activated and what kind of tectonic environment it takes place in so they can feel like any range of things and be any size, almost, and really get your attention.

I've experienced 3.0M and been freaked out while experiencing a 4.7M elsewhere was like someone threw a medium sized stick and hit my tent with it, nothing else.

[defacto7]

19. We have one major fault here, the Wasatch fault.

You can see it on the edge of town following along the foothills of the mountains. This particular quake is not on that fault though it's the opposite side of town nearer to the salt lake. I would like to find out more about the tectonics around here. I've heard there's a liquification effect on the west side but looking at the solid rock to the east on the Wasatch front I'm sceptical. But there are so many geological features around here from so many different epochs maybe it has to do with layers around ancient lake Bonneville. A nice new study to follow up on.

[2naSalit]

20. Well I have a little understanding about the area

and spent several years learning about the regional geologic features. It appears you are within the plane of the ancient lakebed or right next to it which indicates that there could be isostatic rebound, which has been said of other but not all quakes in that area. Isostatic rebound, in simple terms, is where the lack of water that was once present is no longer there weighing down the lithospheric layer, the ground will eventually respond by lifting. There's more to it but I won't try to get technical here. I thought it was such an interesting phenomena that I remembered the term.

It could be something else, I'm not looking at any references at the moment because I feel lazy right now.

The Wasatch front is quite an interesting structure as it has precambrian bedrock exposed, there aren't a whole lot of places where you can find that! But it is thought, last I checked, to be the result of a major series of events that included continent sized tectonic plates smashing together. It really is a fascinating place for geoliwogs.

Since you're near/in the ancient lakebed, liquefaction is a possibility depending on the type of quake that takes place. I could see that being a thing out in the flats more toward Wendover but I suppose it could happen at the base of the front too if lifting was the motion of the event.

[defacto7]

21. Interesting stuff. Do you know about Antelope Island

Just north and in the Salt Lake? That's an amazing conglomeration of layers pushed up from different periods. I'm lazy now myself so I don't want to look it up but there's an area of exposed griss? It's older than the precambrian rock at the bottom of the grand canyon dating more than 2.7 billion yo. Some say 3.2 billion. It's pushed up well over 4000 feet. Not more than a short hike away you stand on some of the most recent chalk rock tallis? I think. Anyway it's an amazing place.

[2naSalit]

24. I didn't know all of that about

Antelope Island! That's fascinating. I spent a lot of time up in Idaho and became familiar with your area through the lens of the Bonneville floods. I'll have to see about going there sometime. Once in a while one of my friends likes to go touring and we often end up in Utah for some reason.

[defacto7]

27. I was just hiking there with my dogs yesterday.

But don't visit in April/May. The Noseeums will eat you alive, lay their eggs under your skin. You no like that. I don't know if they acually do that but it sure as hell feels like it. Deet is their favorite condiment. All other times are perfect.

[2naSalit]

28. Good to know...

Seems I've heard that before. I know that in Spring the bugs on my windshield as I passed by Willard Bay was gag inducing.

[Demovictory9]

23. "SLC"?

[2naSalit]

25. Salt Lake City.

[PufPuf23]

26. There was another earthquake today off the coast of Humboldt county

Today's earthquake was 4.8 after last weeks earthquake of 5.2 (that occurred the same day as the recent Utah earthquake that caused the angel Moroni to lose his trumpet. I did not think the events were linked but maybe wrong?

http://kymkemp.com/2020/03/22/4-8-earthquake-near-ferndale-and-petrolia/

[defacto7]

29. Those things are coming around. We have felt tremors

here that were from large quakes in CA.

[jberryhill]

31. That's because God is finally chiming in on the local abomination there

Pretty sure it’s just a geological phenomenon everywhere else.