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in soil, not air.

Must be inches per second because 1–10 of those is 0.025–0.25 m/s so that matches the parentheses

This is the solid particles in the ground moving in place. As the wave passes through, any given volume of ground is displaced somewhat. In a balanced low-intensity wave, the soil or rock gets jostled around a bit. In a high-intensity balanced wave, the ground is yanked back and forth, potentially damaging foundations or buildings above the foundation. Particles will be displaced, but not permanently, with a net of 0.

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.

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

PSA: it's easy to miss on the first watch because the big action happens in the background behind the gate.

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

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

Maybe they should declare war on India until the stop that.

Rules? well .. we don't even have a real government now. The country is in revolution. Who writes the Rule is whoever who have more firepower or whoever who is closer to Junta. None of the rules works, everything can be bribed to junta.

None of the thing that rational government does works here anymore.

Whoever come inspect the buildings can be bribed with a few hundreds dollars.

also reminds me of:

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.

https://www.youtube.com/watch?v=HDSM-CtYzxY&t=5m29s

It sure would suck to lose half your property to the earth suddenly saying screw you.

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. 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!

I don’t think there’s a universally accepted solution but in California it would be up to the state to figure it out. It would be a great time to be a Real Estate lawyer after a quake there.

> Area doesn't just disappear

Land area does in a subduction zone.