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If anyone is interested in what "G4" means in context, here's the scale: https://www.swpc.noaa.gov/noaa-scales-explanation
G4: " Induced pipeline currents affect preventive measures, HF radio propagation sporadic..." G5: " Pipeline currents can reach hundreds of amps, HF (high frequency) radio propagation may be impossible in many areas for one to two days..."
Earlier quoted context omitted.
I am not an expert, but it’s worth noting that the kp index has a maximum value of 9. So though the Carrington event had a kp of 9, its intensity on the related (but not capped) HP30/HP60 scale [1] would likely have been higher. [1] https://kp.gfz.de/en/hp30-hp60
Queue Chernobyl documentary clip measuring the radiation as low because that’s as high the meter went
Though I suppose you could also queue it.
Earlier quoted context omitted.
Could you see it from the inner city or only closer to the edges?
Friends who live in Kreuzberg and Friedrichshain could see it pretty well. I'm a bit further south within Berlin where skies are minimally darker, but between 10pm and 11pm it was so bright that light pollution didn't matter. Funnily enough, despite having lots of alerts set up it was my mom who texted me from northern Brandenburg as she spotted it after getting an alert from RegenRadar, of all apps...
Nice to hear earth weather apps also work great in space haha. I'll keep that in mind when I set up my own notifications. Hopefully I have time to look into it before the next storm hits.
Discussion of the event https://community.spaceweatherlive.com/topic/4210-x19-cme/
Flux and bZ!
Any tips on best practices in how one can protect homelab rigs from a Carrington level event? Let's say we were given two days notice that the mother of all S4s was inbound. Just switch everything off? What if one of my homelabs needed 100% uptime to meet my wife's SLA for messaging? Is this able to be protected?
Australian Bureau of Meteorology advisory for visible aurora: https://www.sws.bom.gov.au/Aurora
Are there any resources to track Aurora sightings or predicted sightings?
Any tips on best practices in how one can protect homelab rigs from a Carrington level event? Let's say we were given two days notice that the mother of all S4s was inbound. Just switch everything off? What if one of my homelabs needed 100% uptime to meet my wife's SLA for messaging? Is this able to be protected?
Perhaps though you will still be able to continue to send and receive messages despite having disconnected your power supply. [1]
[1] https://babel.hathitrust.org/cgi/pt?id=uva.x001679510&seq=40...
Weirdly, while the site in question is "blaring klaxons!" there are more "cool night lights!" posts than concern.
Unless you're in space, a large scale electrical operator, or relying on HF radio there isn't much reason to be interested other than the lights for a G4 (what this is currently classed as).
Any tips on best practices in how one can protect homelab rigs from a Carrington level event? Let's say we were given two days notice that the mother of all S4s was inbound. Just switch everything off? What if one of my homelabs needed 100% uptime to meet my wife's SLA for messaging? Is this able to be protected?
Shielded Ethernet could plausibly have issues with induced current on the shield. PoE might be less immune than ordinary Ethernet depending on what you’re doing with it, although well-behaved devices should be isolated. If you have a cable ISP, the cable shield might get toasty, although it’s likely to be grounded close enough to your house that any damage will be upstream.
Your 100% uptime will be tricky if your ISP goes down or you lose power.
How rare is this? G4 storms are ~100 per solar cycle (~11 years). So roughly 9 G4 events/year on average.
It probably wouldn't make sense to calculate "average snow days per month" across an entire calendar year (in most places...), this is the same thing.