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G4 (Severe) Watch in Effect for 12 November

https://www.swpc.noaa.gov/news/g4-severe-watch-effect-12-november
14•hnburnsy•2h ago

Comments

h2zizzle•1h ago
>To include

"Including", or "which is to include/which may include".

vorpalhex•1h ago
We had a G5 in 2024 and I believe the only possibly related issue was some cellular infrastructure in Europe (local impact only).

Modern technology is significantly more hardened than telegraphs in the 1800s.

superkuh•1h ago
But we won't actually know anything till about 1 hour before it happens. That's when any potential interplanetary coronal mass ejections actually have their magnetic field orientation and intensity measured by ACE and other satellites far out at the L1 lagrange point: https://services.swpc.noaa.gov/images/ace-mag-swepam-24-hour...

If you see the red line on this plot, the interplanetary magnetic field, be more than -10 nanotesla for about 4 hours then there's a good chance of lower than normal latitude aurora. Negative means the magnetic field is pointing downwards out of the ecliptic plane of the solar system and this is the most energetically favorable orientation for reconnecting CME magnetic field lines with Earth's magnetic field lines and letting solar particles/energy in.

It can be 20nT positive (upwards) magnetic field with intense density and high velocity but still be a non-event aurora-wise just because energy is delivered to the Earth's ring currents at 10x slower rate than if it's pointing downwards.

None of the WSA-ENLIL or related predictive models take into consideration the magnetic field orientation of iCMEs because it's really hard to know from remote observations. They can be thought of as warnings to pay attention to the ACE L1 measurements.

inhumantsar•42m ago
does that apply to the OVATION model used in NOAA's aurora forecast? https://www.swpc.noaa.gov/communities/aurora-dashboard-exper...

X5.1 solar flare, G4 geomagnetic storm watch

https://www.spaceweatherlive.com/en/news/view/593/20251111-x5-1-solar-flare-g4-geomagnetic-storm-...
104•sva_•2h ago•28 comments

I didn't reverse-engineer the protocol for my blood pressure monitor in 24 hours

https://james.belchamber.com/articles/blood-pressure-monitor-reverse-engineering/
67•jamesbelchamber•2h ago•30 comments

.NET MAUI Is Coming to Linux and the Browser, Powered by Avalonia

https://avaloniaui.net/blog/net-maui-is-coming-to-linux-and-the-browser-powered-by-avalonia
23•vyrotek•1h ago•7 comments

Laptops adorned with creative stickers

https://stickertop.art/main/
102•z303•1w ago•98 comments

Four strange places to see London's Roman Wall

https://diamondgeezer.blogspot.com/2025/11/odd-places-to-see-londons-roman-wall.html
33•zeristor•1h ago•7 comments

A modern 35mm film scanner for home

https://www.soke.engineering/
108•QiuChuck•4h ago•83 comments

The terminal of the future

https://jyn.dev/the-terminal-of-the-future
81•miguelraz•3h ago•37 comments

A catalog of side effects

https://bernsteinbear.com/blog/compiler-effects/
65•speckx•4h ago•5 comments

Collaboration sucks

https://newsletter.posthog.com/p/collaboration-sucks
252•Kinrany•3h ago•146 comments

The history of Casio watches

https://www.casio.com/us/watches/50th/Heritage/1970s/
137•qainsights•3d ago•78 comments

Scaling HNSWs

https://antirez.com/news/156
138•cyndunlop•9h ago•29 comments

Meticulous (YC S21) is hiring to redefine software dev

https://jobs.ashbyhq.com/meticulous/3197ae3d-bb26-4750-9ed7-b830f640515e
1•Gabriel_h•2h ago

Pikaday: A friendly guide to front-end date pickers

https://pikaday.dbushell.com
113•mnemonet•8h ago•55 comments

Terminal Latency on Windows (2024)

https://chadaustin.me/2024/02/windows-terminal-latency/
80•bariumbitmap•5h ago•67 comments

My fan worked fine, so I gave it WiFi

https://ellis.codes/blog/my-fan-worked-fine-so-i-gave-it-wi-fi/
98•woolywonder•5d ago•39 comments

Adk-go: code-first Go toolkit for building, evaluating, and deploying AI agents

https://github.com/google/adk-go
35•maxloh•4h ago•9 comments

FFmpeg to Google: Fund us or stop sending bugs

https://thenewstack.io/ffmpeg-to-google-fund-us-or-stop-sending-bugs/
407•CrankyBear•5h ago•316 comments

We ran over 600 image generations to compare AI image models

https://latenitesoft.com/blog/evaluating-frontier-ai-image-generation-models/
93•kalleboo•6h ago•60 comments

AV1 vs. H.264: What Video Codec to Choose for Your App?

https://www.red5.net/blog/av1-vs-h264/
6•mondainx•1w ago•1 comments

Cache-friendly, low-memory Lanczos algorithm in Rust

https://lukefleed.xyz/posts/cache-friendly-low-memory-lanczos/
100•lukefleed•6h ago•17 comments

Xortran - A PDP-11 Neural Network With Backpropagation in Fortran IV

https://github.com/dbrll/Xortran
24•rahen•3h ago•4 comments

Agentic pelican on a bicycle

https://www.robert-glaser.de/agentic-pelican-on-a-bicycle/
30•todsacerdoti•4h ago•18 comments

iPhone Pocket

https://www.apple.com/newsroom/2025/11/introducing-iphone-pocket-a-beautiful-way-to-wear-and-carr...
405•soheilpro•13h ago•1070 comments

How I fell in love with Erlang

https://boragonul.com/post/falling-in-love-with-erlang
362•asabil•1w ago•211 comments

Who Still Uses Cash?

https://www.voronoiapp.com/economy/Who-Still-Uses-Cash-7090
3•Kaibeezy•51m ago•0 comments

The R47: A new physical RPN calculator

https://www.swissmicros.com/product/model-r47
163•dm319•4d ago•88 comments

The Department of War just shot the accountants and opted for speed

https://steveblank.com/2025/11/11/the-department-of-war-just-shot-the-accountants-and-opted-for-s...
71•ridruejo•9h ago•129 comments

Étude in C minor (2020)

https://zserge.com/posts/etude-in-c/
50•etrvic•1w ago•9 comments

Array-programming the Mandelbrot set

https://jcmorrow.com/mandelbrot/
40•jcmorrow•4d ago•7 comments

Show HN: Cactoide – Federated RSVP Platform

https://cactoide.org/
50•orbanlevi•6h ago•21 comments