Physicists find “definitive evidence” of mechanism behind brightest auroras

In August and September 1859, there was a major geomagnetic storm—aka, the Carrington Event, the largest ever recorded—that produced dazzling auroras visible throughout the US, Europe, Japan, and Australia.

Read more…   https://arstechnica.com/science/2021/06/electrons-in-ionosphere-catch-a-plasma-wave-to-produce-brightest-auroras/