[BAA-ebulletin 01005] Aurora and STEVE and NLC

[Rick]

[BAA-ebulletin 01005] Aurora and STEVE and NLC
(c) 2017 British Astronomical Association    http://www.britastro.org/

Aurora Alert, and STEVE and NLC

A coronal hole has started to impact the earth from 14.00UT 31st May 2018. The field is swinging but is mostly negative and the wind speed is rising through 490 kps. It is still light at the moment (Moray Firth), so no conformation. Indications are that this will be visible in central Scotland but could go further. There is also a chance that STEVE will make an appearance so look west as well as north. Finally, the NLC daisies are starting to show some activity from 27th May. Star prize goes to who ever spots all 3 on the same night.

Any reports please to - sandra-b at hotmail co uk

Cheers and good hunting

Sandra Brantingham
Aurora and NLC director

[JohnP]

didnt understand any of that post

[Rick]

Life's pretty dull if you're never coming across things you don't understand. Here are a few handy links for the critical technical terms in the bulletin:

Coronal hole: https://en.wikipedia.org/wiki/Coronal_hole
Aurora: https://en.wikipedia.org/wiki/Aurora
NLC: https://en.wikipedia.org/wiki/Noctilucent_cloud
STEVE: https://en.wikipedia.org/wiki/Steve_(atmospheric_phenomenon)

[JohnP]

Cheers Rick. At least I know where the name STEVE came from now...