This threw me into a rabbit hole for a bit. Apparently there is good evidence that a lot of historical earthquakes in california were due in part at least to the oil industry, which early on would not replace pumped out oil with water.
Now a days they claim they replace the oil with water and all is well. However, as anyone who has owned an ancient used car and has switched from conventional to synthetic motor oil would tell you, there's no way that would work. The assumption is that these voids the oil are in are these hermetically sealed vaults such that one can simply pump in more volume of liquid and balance out pressures. That seems like a big assumption to me. Water is obviously not nearly so viscous as crude oil. It will seep in situations where crude will not. It's probably leaking out like a sieve if its really choss all the way down in California. The oil as it is isn't even very well contained given how common tar seeps are.
Agriculture probably also plays a role. Central valley has sunken what is it 20-25 feet now from historic ground levels? Same issue as a void generated by an atomic test or oil extraction, one would imagine. Mining probably also plays a decent role. Really anything involving removal or non like for like replacement of structural substrate from the ground is probably liable to be associated with seismic activity.
Kind of depressing a realization if this is the case, like we've screwed ourselves with not just the air but the ground we stand on too. You can't really get that stability back without all this new potential energy leaving the system in the form of stuff falling down and new quakes and plates breaking loose and budging a bit more.
>like we've screwed ourselves with not just the air but the ground we stand on too
I'm reminded of something Margaret Atwood once said which boiled down to the fact that there is no starting civilization over, ever again, if we fall back into the Dark Ages. the metals for copper tools and iron-making are in forms that require a lot of technology to even re-smelt, and all the easily accessible mines that don't require heavy machinery and engineering are long mined out
we either get it right this time around or it's over for us
If you ignore all the metal every place around everywhere, then yeah it's harder to get to.
I have to believe we would be able to make due with the available mountains of metal that is already in use in things?
it largely depends on the metal but the issue is with quality, not amount. plus, you don't have much in the way of just iron items these days - you have steel which requires temps quite a fair bit above what's possible in a charcoal/coal-based forge to work. early copper metallurgy utilized ores that were 10%+ metals - much softer, more malleable. these days we work with less than a single percent (but from much larger veins). much smarter people have written about this than me: https://ui.adsabs.harvard.edu/abs/2025GsGe....400323M/abstra...
a better focus would probably be on the fact that there's no longer really easily accessible coal anymore, much less oil. there also are far less trees by which you can make charcoal and firewood (except in certain areas) and that's actually fairly important when it comes to crafting and technology: https://www.postcarbon.org/can-civilization-survive-these-st...
If human society collapses, our cities and landfills will become ores. Strange ores filled with unnatural mixtures of metals, but ores nonetheless.
The sources you've linked discuss mostly the recovery of additional metals on top of what we have already recovered. That's a different and much harder problem. It's worth remembering that historically, the amount of metal obtained was much smaller — the vast majority of the copper that has ever been mined was mined in the last century, even though humans have been using copper for thousands of years. But historically, that copper was mostly used for consumer products, while today it becomes electrical cables, so it's less obvious how much copper we all use. There's surely enough copper in the walls of my apartment for everyone living here to cook in a copper pan, even though we think of copper pans as being too expensive nowadays.
Yup, assuming post-collapse populations are smaller, we’d have unimaginable wealth available just salvaging from existing equipment and buildings.
> I'm reminded of something Margaret Atwood once said which boiled down to the fact that there is no starting civilization over, ever again, if we fall back into the Dark Ages. the metals for copper tools and iron-making are in forms that require a lot of technology to even re-smelt, and all the easily accessible mines that don't require heavy machinery and engineering are long mined out
> we either get it right this time around or it's over for us
Space, the final frontier.. *cue intro music
can't get to space if you can't even smelt a spade, imo
The materials just in the frame of a typical big box store would be sufficient for any basic blacksmith to make millions of spades (and shovels!) using nothing but basic charcoal and a blower.
And you can make several thousand human operated blowers, forges, and small utility buildings also with the materials in a typical big box store’s frame.
The biggest issue would be food and day to day energy requirements and fertilizer. A lot of our economy is highly dependent on refined hydrocarbons and derived products like ammonia/nitrates that aren’t locally producible right now.
For a smith to operate at all there has to be a level of societal stability that could well be too much of a starting assumption in this scenario.
Nah. Smiths literally came along with travelling war parties all the time.
In Europe, nearly every village had one (it was pretty required), and they operated even during active wartime. Because they had too.
All you really need is a skilled blacksmith, a forge, an anvil, and some hand tools. Well, and some fuel and iron.
All that can be transported by cart with a small team of people. In a village, even in wartime, you don’t need to move it, so it’s really just fuel and a few folks + metal feedstock, which is likely even more available from scavenged weapons and the like.
On the other hand, it's kind of reassuring that if we cock it up bad enough this time around, we won't be given the opportunity to make the same mistakes a second time?
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Eh, not really. Any large scale dump will contain riches - in both accessible energy sources, like burnable and melt able plastics and other materials and metals - that it dwarfs whatever was available to any pre-industrial society.
We might have a pretty rough time dealing, but we’ve got a lot of wealth accumulated above ground now, and we’d have plenty of chances to make a go at it.
Why are taking sci-fi authors seriously? They are entertainments, nothing more.
Looks like someone doesn't understand the difference between an attribution and an appeal to Authority
> Mining probably also plays a decent role.
In the Johannesburg area in South Africa, gold mining has produced up to half of all gold ever extracted in the world, with mines reaching depths of 4000m.
This has resulted in frequent seismic events, in the 2.0 to 3.0 range on the Richter scale, occurring on a daily or weekly basis, more occasionally reaching 5.0. This started around 1906 and still continues today. See:
https://www.sciencedirect.com/science/article/pii/S167477551...
I wonder if there's an argument to be made that these little earthquakes help release stored potential energy in the crust, preventing it from building into a more severe and dangerous event?
What kind of earthquakes in California ?
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