Iksarfighter wrote: ↑Mon Sep 12, 2022 9:14 am
30 sec exposure ? As the stars moved a bit.
I think the stars were smeared by camera vibration during 100 ms exposure and the sprites lasted 1 ms and did not smear so much.
The sprites are tracks of cold plasma balls that go up at 10% speed of light and therefore those balls do get smeared in a 100 ms exposure:
it takes (90 km - 50 km)/(30 km/ms) = 1.3 ms for a ball to travel its track
It seems very strange to me that a cold plasma ball going up should fork 3 ways to make a trident.
By the way
Rorik of Dorestad, the Danish prince to start the Rurikid dynasty, used both Thor's hammer and trident insignia (that trident survives at the modern Ukranian flag). Must been a red sprite trident, to go together with Thor
![Image](https://scontent-ams4-1.xx.fbcdn.net/v/t39.30808-6/299189937_4801567549942887_5318534131422115639_n.jpg?_nc_cat=109&ccb=1-7&_nc_sid=730e14&_nc_ohc=IFUW2iSiJ4kAX_qMngv&_nc_ht=scontent-ams4-1.xx&oh=00_AT89yHXpgvs51m4aZXok-8zELpnVN9ajG6IRjLiGg6jXUA&oe=63239D03)
Update. Sorry, Rorik used bident; the Rurikid made it into a trident later, after Olga (Helga) added Freya's hawk-flying cloak and it transformed to a middle prong.