CCTV footage captures video of an earthquake fault in motion
smithsonianmag.com
smithsonianmag.com
What was on your property is now on my property!
Straight borders might become crooked if they cross the crack though.
There, it even explains some history and methodology for defining the borders. Mostly, they are defined by physical markers that hopefully the original surveryors left on the ground. I found a couple around my property (which is on hills so it's likely difficult to mark properly on a map from above) and it seems the borders are actually almost correct. As my fences have been up for over 20 years in the same location, I believe they also count now as de-facto borders now!
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...
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.
I was thinking of adverse possession, for which the time limits are 20 years or even 10 years in some cases:
https://jdc-definitions.wikibase.wiki/wiki/Adverse_Possessio...
Original Swedish text: https://www.riksdagen.se/sv/dokument-och-lagar/dokument/sven...
Simply making uncontested use of the land is not enough.
I guess it is something that can happen quite easily in rural settings with very old property lines. Farmer 1 and 2 agree to some deal and a while later farmer 3 turns up and says "hey that's my land".
You could alternatively just deal with your new jagged plot.
Worst case scenario, you're now the owner of the new Turkish Canyon.
Land area does in a subduction zone.
https://en.wikipedia.org/wiki/Subduction#/media/File:Global_...
Essentially one affected party comes up with a proposed solution, files paperwork with the court, and then all the rest of the affected parties get together (under court supervision) to make whatever changes are necessary until the solution is fair. If the court agrees that it is a fair solution, it becomes final.
https://law.justia.com/codes/california/code-ccp/part-2/titl...
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)
And of course, the earthquake energy source is many magnitudes larger and much, much further away, deep in the crust, with the wavefront already having passed through miles of solid rock. We measure blasts from at most a few hundred meters away.
In an unbalanced wave, the earth is permanently displaced in a particular direction. We can measure that net displacement in a particular direction using an anti-derivative if the total average velocity is nonzero (if we included negative velocities around a given axis). Earthquakes, of course, tend to have nonzero net displacement, and thus an extremely biased velocity waveform along a particular axis.
So in fact, the soil beneath you vibrating back and forth at 1 to 5 inches per second is not fun. At 118 inches per second? Catastrophe.
Does that mean Myanmar is now an active zone?
None of the thing that rational government does works here anymore.
Whoever come inspect the buildings can be bribed with a few hundreds dollars.
https://en.wikipedia.org/wiki/Pitch_drop_experiment#Universi...
in 1663 Scottish mathematician James Gregory figured out that you could calculate the distance between the Earth and the Sun by making measurements during the transit of Mercury or Venus across the Sun. You get much more accurate results with Venus, but the next transit of Venus wasn't predicted to be until 1761 and 1769.
In 1760 French mathematician Guillaume Le Gentil sailed from France to India to make observations of the transit, but due to weather and delays, he was still on the ship when summer 1761 arrived and he missed his chance to make his measurements. So he stayed in India for another 8 years. And then on the day of the 1769 transit, it was cloudy and he missed it again. So he went back to France where he found out he had long ago been declared dead, his possessions had been seized and his wife had married somebody else.
Metres of movement would definitely be significant for a lot of mapping use cases. This is why the time component of any coordinate measurement is important, both due to earthquakes as well as plain old plate motion.
https://nautil.us/what-happens-to-google-maps-when-tectonic-...
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).
uBlock Origin is open source, very efficient, and seems to be well regarded around these parts.