Mine collapse, Mag 3.1, in Tennessee

[Astronuc]

I was looking at US Earthquake Activity during the past 30 days, and noticed

M 3.1 Mine Collapse - 4 km SSW of Crab Orchard, Tennessee ​

https://earthquake.usgs.gov/earthquakes/eventpage/se60353147/executive

• 2021-08-13 11:57:17 (UTC)
• 35.877°N 84.898°W
• 0.0 km depth

One often sees quarry blasts, but they typically less then Mag 2, or in the range of Mag 1 to 2.

 

[Baluncore]

It was an extensive underground limestone mine.
“The internal collapse of the mine, now owned by Lhoist North America and is approximately two miles deep into the mountain with three levels, occurred around 6:30 this (Friday) morning. There were workers at the mine but none suffered injuries according to sources.”
http://crossvillenews1st.com/report...stone-mine-crab-orchard-lhoist-north-america/

 

[AlexTheParticle]

Wow, that's definitely an interesting observation. It's definitely concerning to see a mine collapse with a magnitude of 3.1. I wonder what could have caused it to be that strong? It's also interesting to note that it's only 0.0 km deep, which means it was very close to the surface. I hope everyone in the area is safe and that there isn't any major damage. It's definitely a reminder of the potential dangers of mining and quarrying. Thank you for sharing this information.