The Living Force
And there it came - the geomagnetic Storm (K Index 7)
night from 3 to 4th November 2021
I was surprized, because I bumped into the (first) info about Northern Lights, this morning at 06.00 in the Swedish mainstream media (a rare place for Aurora). They published an article around 23.30 that Northern light were visible over Southern Sweden.. and was I like... wuah ?!? And... how could I miss that ? Well easy... it was cloudy with drizzle all evening while driving the subway, that's why. Albeit I do remember that on my way home around 03.30 some parts of the sky broke up a little bit, because I noticed the very clear stars... but nothing glowing, though.
As of now, 06.00 local time, the storm appear to go on over Canada and US. When the estimate approaches 100 GW, that's always a splendid energy number for visible aurora, of course. Here in Stockholm... well, dawn is just about to rise and it is.... uhm... overcast with fog. Wehee (not).
showed some beautiful images, which were taken by Marcus Varik in Tomsø, North Norway in the late night of 3 Nov 2021. And boy he had a great time, you can tell !
A cannibal CME hit Earth's magnetic field on Nov. 3rd (~20:00 UT). The impact sparked a strong G3-class geomagnetic storm with intense auroras around the Arctic Circle.
Varik is one of the most experienced guides in Norway. "Even I was impressed," he says. "The auroras were strong, one of the best displays in years. I am very tired, but happy."
Earth is now passing through the CME's wake. Storm conditions have subsided to category G1 (minor) with occasional episodes of G2 (moderately strong). This means auroras may be visible in northern-tier US states such as Minnesota and Montana. Dark skies are essential, so get away from city lights.
What is a Cannibal CME?
It's a CME that eats its own kind. On Nov. 2nd, sunspot AR2891 hurled a fast CME toward Earth. As it approached our planet, it overtook at least one other CME and swallowed it. The mashed-up pair struck Earth on Nov. 3rd (2000 UT). Solar wind data from the DSCOVR spacecraft showed a stairstep structure indicative of two or more CMEs pressed together.