[dgacmu]

Perhaps you checked a few minutes too soon?

> SWPC Forecasters have issued G3 (Strong) Geomagnetic Storm Watches for 04-06 October due to a pair of coronal mass ejections that are anticipated to arrive over the course of the next three UTC days. Stay tuned for updates as we monitor this activity!

[chgs]

Is a UTC day a different length to a common solar day? At this level of pre soon leap seconds and even sidereal day difference makes no difference

[buescher]

Yes, but they probably mean "the next 72 hours from right now given in UTC".

[Gare]

Or maybe they mean "day" as starting from UTC midnight.

[buescher]

I'd guess that's actually more likely. Interesting bit of jargon.

[sevensor]

Maybe they’re contrasting with sidereal days?

[chgs]

That was my initial thought, but that’s a difference of 10 mins over 3 days, and that’s orders of magnitudes more precise than should be used.

[chgs]

Which would be the same as the next 72 hours in PST