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What causes lightning? The answer keeps getting more interesting (quantamagazine.org)
nomilk 1 days ago [-]
That 7 second video of a small rocket shot into a cloud to induce a lightning strike (about half way down the article) is incredible.

https://www.youtube.com/watch?v=5BJIiX9_c_M

Any ideas why the lightning strike appears mostly green (and momentarily purple and orange)?

postalcoder 1 days ago [-]
Copper emits a green-blue light in the flame test https://www.youtube.com/watch?v=dwsexjcROH4
innis226 22 hours ago [-]
The surrounding air becomes ionized. Since Earth’s atmosphere is mostly nitrogen, and ionized nitrogen often emits a purple glow.
deepandmeaning 1 days ago [-]
I'm imagining it's something related to the copper wire.
CGMthrowaway 19 hours ago [-]
Why don't we do this on the norm and somehow harness the energy?

https://en.wikipedia.org/wiki/Harvesting_lightning_energy

kjkjadksj 18 hours ago [-]
Prize is too low. Says it only delivers 38 gallons of gas equivalent energy, assuming no loss which there will be.
margalabargala 16 hours ago [-]
There are some places that are hit by lighting with high regularity where it might make sense. Lightning rods on tall buildings. Somewhere near here: https://en.wikipedia.org/wiki/Catatumbo_lightning
teh_infallible 1 days ago [-]
I always wanted to replicate this with a helium balloon and a long, wet string coated with copper filings.
batch12 1 days ago [-]
You'd probably need a very large balloon to overcome the weight of the string
CamelCaseCondo 1 days ago [-]
Maybe just salt water and skip the filings?
CamperBob2 19 hours ago [-]
Even better, use hydrogen!
aaron695 13 hours ago [-]
[dead]
raulparada 22 hours ago [-]
If that new theory turns out to be somewhat right, there'll be something humbling about ancient greeks stories of Zeus sending Hephaestus bolts from ~'heaven/the cosmos' being closer to it than our modern explanations all along
wpollock 16 hours ago [-]
I found this article interesting but lacking. Lightning also sometimes travels from the ground up to the clouds. Storm clouds produce red sprites (there are some theories about these) and blue jets, that shoot upwards towards space. Then there's ball lightning. None of these phenomena were discussed in the article.

I don't think scientists fully understand lightning at all. (At least, I don't!)

somedrag 21 hours ago [-]
There's a Feynman lecture abput electricity in the atmosphere that is interesting to read alongside this article:

https://www.feynmanlectures.caltech.edu/II_09.html

saltyoldman 18 hours ago [-]
Probably the same thing that causes my fingers to get a small spark when I'm walking in the grocery store holding a cart and touching the shelves.
varispeed 14 hours ago [-]
I sometimes get a spark when petting my cat
freehorse 1 days ago [-]
Tl;dr lightings may be caused by electrons/positrons from outer space hitting a cloud and initiating an "avalanche" of electrons.
xattt 22 hours ago [-]
There’s a video of an EF5 tornado from the last 24-48 hours that shows continuous lightning in the background.

There hasn’t been an increase in background cosmic rays, so likely the mechanism for lightning generation is likely a continuum in different scenarios. Cosmic rays are one, but not all.

aaarrm 20 hours ago [-]
I tried to find this after reading your comment and the amount of nonsense AI tornado videos is a lot to wade through. Wasn't able to find it.
xattt 17 hours ago [-]
This was it on Reddit: https://www.reddit.com/r/mildyinteresting/comments/1t7jlat/a...

Despite the title, the video shows a really strong mesocyclone as there is a break between the cloud and the ground. The funnel might be visible, but it’s not as big as the video makes you think.

safeimp 13 hours ago [-]
This video was a repost btw, it's from 2025:

https://en.wikipedia.org/wiki/2025_Enderlin_tornado#Tornado_...

ambicapter 7 hours ago [-]
Orrrrrr, there are always tons of cosmic rays of the type that create lightning hitting earth, there just aren't the conditions necessary for those rays to trigger lightning except for when there's a big storm. I imagine the clouds are a different electrical environment than a regular sky and maybe in those conditions a cosmic rays will trigger lightning. Like a gigantic bubble chamber made of our atmosphere.
pfdietz 1 days ago [-]
Cosmic rays are mostly protons, not electrons or positrons. You're mixing up to separate theories in the article.
nirse 23 hours ago [-]
Well, the primary particles that hit the atmosphere are mostly protons. They cause avalanche of secondaires that are varied but mostly muons,
sidewndr46 21 hours ago [-]
As others have mentioned you are correct. But Earth's atmosphere has plenty of all forms of matter. A proton can interact with mostly anything and accelerate it. So you can find high energy everything in low earth orbit.
nephihaha 1 days ago [-]
Much of the time they occur when two weather fronts of different temperatures collide with each other.
cinderelacinder 1 days ago [-]
[flagged]
metalman 1 days ago [-]
[flagged]
cratermoon 21 hours ago [-]
Neutrons, neutrinos, photons, Z bosons and Higgs bosons are all neutral particles and carry no charge.
metalman 20 hours ago [-]
no detectable ELECTRICAL charge, but they do contain "energy", and do attract with other particles, so I am still ABSOLUTLY totaly correct in my statement. "the universe is an energy gradient", and one of the few absolutes
avazhi 18 hours ago [-]
[flagged]
chermi 17 hours ago [-]
Explain exactly what's click bait about it? Spell it out like I'm an idiot who found the article quite good for a fairly wide audience.
avazhi 7 hours ago [-]
Sure.

Look at the title. Imagine what you'd expect an article whose title is "What causes lightning?" to say.

Now, here's how the article closes:

"These features suggest that even as explanations get more comprehensive, the case of how lightning really works will keep getting reopened. “It just gets more and more bizarre the more we look,” Dwyer said. “Clearly our very simple pictures here are really incomplete.”

So TLDR, we don't know, we know we don't know, and in fact we anticipate not knowing for quite some time. The article explicitly admits it doesn't know the answer to the question it posed in the title - no, the answer doesn't keep getting more interesting, because we don't have the answer yet.

That's clickbait.

dezsiszabi 16 hours ago [-]
Is that the purpose of Quanta? To provide new info, new info to who? To you, specifically?

Its purpose: https://www.quantamagazine.org/about/

avazhi 7 hours ago [-]
Quanta articles are invariably horribly written, horribly explained, and constantly do this thing where they simultaneously are pretentious and over complicate things while also belabouring simple, elementary concepts. Essentially it’s the worst of every world.

And that’s to say nothing about how they click bait everything.

joshikarthikey 1 days ago [-]
[flagged]
Sharlin 21 hours ago [-]
We don’t even understand friction. Which is one source of static charges, which we thus don’t understand well either. And static charges that somehow accumulate in the clouds cause lightning, which… I think you get the point.
dnnddidiej 24 hours ago [-]
It is cool that something so seemingly ordinary is extraordinary.
JadeNB 24 hours ago [-]
Not to be flip, but, depending on what "fully" means, we haven't fully understood much of anything about the real world.
nephihaha 1 days ago [-]
Never mind this kind of lightning, it gets really interesting when we start to look at ball lightning, which is very real but rarely sighted.
Tomte 24 hours ago [-]
As a child I saw an acted segment about ball lightning in childrens‘ TV, following a person around the house, and had nightmares for a long time afterwards. The thing is spooky as hell.
sidewndr46 20 hours ago [-]
As long as you reject the hypothesis of "ionized matter" ball lightning is completely unexplainable. If you accept that ionized matter is hot and gives off plenty of EM radiation, it's pretty simple.
echelon 23 hours ago [-]
We don't even have an accurate mathematical description of how a single water molecule works.

We have so much scientific work to do.

fguerraz 1 days ago [-]
So, nothing new?

The cosmic ray hypothesis has been dominant for a few years now.

This magazine…

JadeNB 24 hours ago [-]
> So, nothing new?

> The cosmic ray hypothesis has been dominant for a few years now.

> This magazine…

I think saying "This magazine…" as if the flaws of Quanta are well understood and agreed may need additional elaboration. If you mean that experts have known this—well, the role of Quanta is to disseminate and explain expert research to scientifically literate non-experts; it is not meant to be distributing the latest research itself.

avazhi 11 hours ago [-]
> the role of Quanta is to disseminate and explain expert research to scientifically literate non-experts; it is not meant to be distributing the latest research itself

Quanta articles are invariably horribly written, horribly explained, and constantly do this thing whether they simultaneously are pretentious and over complicate things while also belabouring simple, elementary concepts. Essentially it’s the worst of every world.

And that’s to say nothing about how they click bait everything.

paxcoder 22 hours ago [-]
[dead]
fguerraz 20 hours ago [-]
Well, let's say I just don't understand the popularity of this magazine on HN.
kami23 18 hours ago [-]
Why not explain why you think that? We can't all be perpetually online to have an opinion about a one website that shows up occasionally on this site.
avazhi 11 hours ago [-]
Not the guy you’re responding to but Quanta articles are invariably horribly written, horribly explained, and constantly do this thing whether they simultaneously are pretentious and over complicate things while also belabouring simple, elementary concepts. Essentially it’s the worst of every world.
darqis 19 hours ago [-]
emdash means LLM written article
cwnyth 19 hours ago [-]
Here's an em-dash in an article from 2013.

https://www.quantamagazine.org/biology-confronts-data-comple...

The presence of an em-dash is not a smoking gun.

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