"The exercise was held from May 8 to 9, 2024, at the Johns Hopkins Applied Physics Laboratory (APL) in Laurel, Maryland, and at a Federal Emergency Management Agency (FEMA) site in Denver, Colorado."

Article refers to a PDF of the report it's based on:

https://www.jhuapl.edu/sites/default/files/2025-04/Space-Weather-TTX-Report-Summary-v3-FINAL.pdf

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[–] 148 points 1 year ago (1 child)

Note: "Would Be a Catastrophe" even back when the agencies involved in mitigating the disaster still existed.

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  • [–] 35 points 1 year ago (3 children)

    Oy. I really don't want to see what happens when we're faced with an actual challenge. This is... yikes.

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  • [–] 26 points 1 year ago (3 children)

    I would get a case of beer and go to the library and read until the internet was back on. You can't stop my escapism that easily.

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  • [–] 60 points 1 year ago* (2 children)

    I'm glad this threat is at least starting to be taken seriously. As an amateur radio operator, I got incredibly interested in how the weather on the sun affects radio propagation and power management here on Earth.

    Better a CME than an EMP just simply because there is at least some time to prepare for a massive CME. Whereas an EMP has absolutely no warning whatsoever.

    In the event of a massive CME off-grid homes and buildings are likely to fare much better because they are not connected to the power grid. The problem comes with long transmission lines where incredibly large charge differentials can build up over distance. shorter wires can't build up nearly the same amount of charge differential.

    Edit: I feel it's important to mention that grid tie systems are going to be just as vulnerable as on grid because you still have the grid actually physically connected to the building.

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  • [–] 19 points 1 year ago (2 children)

    It's worth noting that even though a building might have solar, the systems usually disable themselves in the event of a blackout to prevent back feeding into the grid.

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  • [–] 14 points 1 year ago (1 child)

    That's known as a grid tie system and my edit mentions that. The only way it's going to help is if the grid is physically disconnected from the building as in the wire is not connected to the building at any point.

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  • [–] 4 points 1 year ago (1 child)

    Unless I'm missing something here, thats what an LVD should do, and anyone grid-connected with solar should have.

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  • [–] 6 points 1 year ago (3 children)

    During a normal power outage, you're right. That does keep you isolated on your own island. But in a case like this, the voltage is likely to spike to incredibly high levels on wires that aren't meant to carry it and cause arcing and possibly fires. That's why you want to be physically disconnected.

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    [–] 57 points 1 year ago (5 children)

    You know those stories where the world is reduced to a post-apocalypse after a natural event? What if that's only what happens in the US, and the rest of the world recovers with ease due to extant rescue services?

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  • [–] 17 points 1 year ago (4 children)

    If it wasn’t for the stupid Darrel Dixon show, my head canon of the walking dead only affecting America would still stand.

    They literally just walk, and it would be pretty obvious that everyone is infected after the first year or so of people dying from the flu and shit. Any country with competent leadership could have squashed the zombies in a couple months.

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  • [–] 23 points 1 year ago (1 child)

    After experiencing the covid-19 outbreak I am now fully convinced that a zombie apocalypse is feasible, there would be people denying the existence of the zombie virus, just going to the infected an getting bitten because they wanted a pizza or something, that and people just drenching themselves in bleach or something because they heard that keep the zombies away from some dude online. Stuff like that.

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  • [–] 8 points 1 year ago* (last edited 1 year ago) (2 children)

    ...and simply agrees to never, ever, set foot in North America.

    I'm in.

    Not sure, though, how this ploy would work out for our fine fellows in South America, Mexico, and Canada, the ones currently belabored with being the closest neighbours to The Wastelands.

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  • [+] 49 points 1 year ago* (last edited 11 months ago) (1 child)
  • [–] 25 points 1 year ago (3 children)

    I'm not a doomsday prepper, but stuff like this makes me want to sequester some gear...

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  • [–] 12 points 1 year ago (3 children)

    I have an old safe where i keep some old tech and power banks - just junk really but the Faraday is enough for any solar flare and i think it looks cool. Not sure what good that would do if all cell towers and satellites are fried though. Even fiber is unlikely to operate as I imagine most switches are not secured.

    Last time I did research on this I came out entirely unconvinced of value of prepping here. Just the usual water, gas stove and bags of rice is really best bet and invest everything else back to local communities because economies of scale kicks ass.

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  • [–] 4 points 1 year ago* (last edited 1 year ago)

    During the recent Iberian Peninsula Blackout, which in practice meant a whole day without power and most of it without water, thanks to a past phase of mine as a bit of a prepper I:

    • Had a windup radio which I used to keep up with what was going on and some entertainment. It also works as a flashlight, so covered that side also.
    • Quickly concluded that the water supply of the city I live in was likely to get compromised because the pumps are powered from mains so the first thing I did when I got home was fill a bunch of containers with water, most of which I ended up using. Also I already had 10L of drinking water stored just in case.
    • Had some freeze dried food so wasn't worried about running out of food (though 1 day is nowehere near enough to empty normal food reserves if you keep a few cans of food around, so I never got close to having to use it).
    • My habbit of having some cash with me meant I could buy a bit of extra food from a local grocer which was open at the start of the blackout. If you pay everything electronically, you're not only screwed in situation were mains power goes down but you're even vulnerable to the consequences of banks having problems with their systems (which happens once in a while)

    Anyway, my point is not to go full prepper, my point is that some elements of that minset and practices will cover the far more common kind of problems - which happen maybe once every few years - that leave you without power and water for a few days.

    One thing I did find out is that I probably need something like a solar powered powerbank for loading my tablet since that's how I mostly read books nowadays (didn't actually need one in this blackout as it was of just a day and as it was offline the charge was more than enough for it), so I've ordered one.

    Little things like that mean you don't actually get unecessary stress in a situation like this.

    It's not something that is going to save you from nuclear holocaust or in general the collapse of human civilization, but it will save you from spending days without food or water or the stress of not knowing what's going on, such as in such a long and unsual blackout, a flood or other similar more frequent catastrophes.

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  • [–] 8 points 1 year ago (1 child)

    I don’t think it will matter. We need modern logistics to produce and get food to people. Without that 90% of people will starve in the first few months.

    It’s good to have supplies for regional disasters and events that only last a few weeks or months. But if the national grid is going to be out for a year or more and things like fuel and food can’t be transported and stored at key locations then it’s all going to shit.

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    [–] 19 points 1 year ago

    They said we weren't prepared for a pandemic, either.

    Shit we gotta fix this.

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  • Don't look up

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  • [–] 12 points 1 year ago (7 children)

    Man you know it’s bad when you’re rooting for this or a civil war or nukes. Just to reset everything. I’m so over being an American.

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    [–] 12 points 1 year ago

    good thing we got rid of fema in 2025 then

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  • [+] 12 points 1 year ago* (last edited 1 year ago) (1 child)
  • [–] 4 points 1 year ago (1 child)

    Im starting to think the fermi paradox is based around what philosophy it follows. "Efficiency" like lean or robustness like six sigma.

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  • [–] 23 points 1 year ago (2 children)

    If a transmissions company tried to spend money preparing for a disaster like this, their shareholders would sue them into the ground and lobby to make it illegal to acknowledge the existence of the sun.

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