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CCTV footage captures video of an earthquake fault in motion

smithsonianmag.com

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Re: CCTV footage captures video of an earthquake fault in motion

#71

Post by brabel »

throw123xz wrote: post #59
brabel wrote: post #43

Earlier quoted context omitted.

Firefox with AdBlocker Ultimate. Also saw no other videos, thankfully.

OT, but the company behind that extension seems to be a bit shady. uBlock Origin is open source, very efficient, and seems to be well regarded around these parts.

Thanks for letting me know. I always confuse the two and ended up with the "wrong one" I guess.... though they haven't given me any trouble or annoyances so far (they just open a page where I can volunteer to make a payment every now and then, but it's easy enough to close the tab and ignore it).

Re: CCTV footage captures video of an earthquake fault in motion

#72

Post by apelapan »

brabel wrote: post #45
widforss wrote: post #26

Earlier quoted context omitted.

By the discussions I've had with surveyors in my country (Sweden), any coordinate descriptions of properties are deferred to the physical markers in the ground (cairns for older property, metal stakes for newer ones). This would only be an issue in properties that have never been surveyed (and marked) at all. Straight borders might become crooked if they cross the crack though.

I am also in Sweden, and learned recently that a large part of my property seems to actually belong to the neighbour according to the online map! But there is a page in the relevant authority's website which clarifies that the online map can be 10s of meters off (in Swedish): https://www.lantmateriet.se/sv/kartor/vara-karttjanster/Visa... There, it even explains some history and methodology for defining the borders.…

The official map of your property will not be exactly the same as the one on Lantmäteriet.se.

In more densely populated areas, there will be a local coordinate system, where each property is defined in terms of the neighbouring ones. This also applies to newly formed properties in old areas.

The property borders on digital maps are machine approximations of the mapping from the local coordinate system onto an absolute global coordinate system. This mapping can never be perfect, and it is often much less perfect than it could have been.

When the physical markers are missing or suspected of having moved from their original location (happens all the time for all sorts of reasons), Lantmäteriet will review the original documents of your and any number of neighbouring properties and deduce where the markers ought to be.

Regarding your fence, 20 years is very far from enough to establish "urminnes hävd". I suggest you wait another 100 years before you start assuming that they could act as facts on the ground in a property disputes! :-) And even then I wouldn't bet on it, unless the national archives are all destroyed...

Re: CCTV footage captures video of an earthquake fault in motion

#74

Post by dang »

gnabgib wrote: post #3

Discussion (81 points, 3 days ago, 13 comments) https://news.ycombinator.com/item?id=44655128

Thanks! Macroexpanded:

Earthquake Causes 2.5-Meter Ground Slip in First-Ever Footage - https://news.ycombinator.com/item?id=44655128 - July 2025 (18 comments)

First fault rupture ever filmed [video] - https://news.ycombinator.com/item?id=44305403 - June 2025 (1 comment)

First fault movement ever filmed. M7.9 surface rupture near Thazi, Myanmar [video] - https://news.ycombinator.com/item?id=43959274 - May 2025 (3 comments)

Re: CCTV footage captures video of an earthquake fault in motion

#76

Post by dang »

schobi wrote: post #18
ranger_danger wrote: post #2

Isn't this news several months old?

A previous discussion of the M7.7 quake in Burma/Myanmar from March 28, 2025 was provided by Sean Wilsey. He explained the earthquake and context and discussed the CCTV footage around 6:30 https://youtu.be/CfKFK4-HNmk

Link added to the top text. Thanks!

Re: CCTV footage captures video of an earthquake fault in motion

#77

Post by dang »

frauhaus wrote: post #21
DavidSJ wrote: post #13

Earlier quoted context omitted.

This is the original video, for those looking: https://m.youtube.com/watch?v=77ubC4bcgRM

And here’s the related paper: https://pubs.geoscienceworld.org/ssa/tsr/article/5/3/281/659...

Link added to the top text. Thanks!

Re: CCTV footage captures video of an earthquake fault in motion

#78

Post by dang »

DavidSJ wrote: post #13
cibyr wrote: post #12

So many autoplaying videos on the page, and none of them are the video that the article is about.

This is the original video, for those looking: https://m.youtube.com/watch?v=77ubC4bcgRM

Link added to the top text. Thanks!

Re: CCTV footage captures video of an earthquake fault in motion

#79

Post by apelapan »

apelapan wrote: post #72
brabel wrote: post #45

Earlier quoted context omitted.

I am also in Sweden, and learned recently that a large part of my property seems to actually belong to the neighbour according to the online map! But there is a page in the relevant authority's website which clarifies that the online map can be 10s of meters off (in Swedish): https://www.lantmateriet.se/sv/kartor/vara-karttjanster/Visa... There, it even explains some history and methodology for defining the borders.…

The official map of your property will not be exactly the same as the one on Lantmäteriet.se. In more densely populated areas, there will be a local coordinate system, where each property is defined in terms of the neighbouring ones. This also applies to newly formed properties in old areas. The property borders on digital maps are machine approximations of the mapping from the local coordinate system onto an absolut…

I had to go back and check regarding "Urminnes hävd" (ancient custom). The creation of new instances of this for property rights was blocked back in 1970.

You can still use it, but then you must prove that the property right was an established ancient custom already before 1970. Anything that started after that will never qualify, no matter how much time passes.

Re: CCTV footage captures video of an earthquake fault in motion

#80

Post by irjustin »

zellyn wrote: post #55
irjustin wrote: post #8

Earlier quoted context omitted.

Videos of earthquakes are common enough. It's the video of the fault line itself fracturing that's so interesting. We know where the fault lines are, so we generally avoid building anything major near them because... well earthquakes. Hence no other videos of actual fault line fractures (vs general street ones).

The California Memorial Stadium is built directly on a fault line, right?

Guess we'll get even better videos then.
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