Editing Aurora (section)

==== Picket-fence aurora ====

The processes that cause STEVE are also associated with a picket-fence aurora, although the latter can be seen without STEVE.<ref>{{cite web|last1=Andrews|first1=Robin George|title=Steve the odd 'aurora' revealed to be two sky shows in one|url=https://www.nationalgeographic.com/science/2019/05/odd-aurora-named-steve-revealed-to-be-two-different-sky-shows-in-one/|archive-url=https://web.archive.org/web/20190504000133/https://www.nationalgeographic.com/science/2019/05/odd-aurora-named-steve-revealed-to-be-two-different-sky-shows-in-one/|url-status=dead|archive-date=4 May 2019|website=National Geographic|access-date=4 May 2019|date=3 May 2019}}</ref><ref name="nishimura-2019">{{cite journal|last1=Nishimura|first1=Y.|last2=Gallardo-Lacourt|first2=B.|last3=Zou|first3=Y.|last4=Mishin|first4=E.|last5=Knudsen|first5=D. J.|last6=Donovan|first6=E. F.|last7=Angelopoulos|first7=V.|last8=Raybell|first8=R.|title=Magnetospheric signatures of STEVE: Implication for the magnetospheric energy source and inter-hemispheric conjugacy|journal=Geophysical Research Letters|volume=46|issue=11|pages=5637–5644|date=16 April 2019|doi=10.1029/2019GL082460|bibcode=2019GeoRL..46.5637N|doi-access=free }}</ref> It is an aurora because it is caused by the precipitation of electrons in the atmosphere but it appears outside the auroral oval,<ref>{{cite web|last1=Lipuma|first1=Lauren|title=Scientists discover what powers celestial phenomenon STEVE|url=https://news.agu.org/press-release/scientists-discover-what-powers-celestial-phenomenon-steve/|website=AGU News|publisher=American Geophysical Union|access-date=4 May 2019|archive-date=4 May 2019|archive-url=https://web.archive.org/web/20190504103127/https://news.agu.org/press-release/scientists-discover-what-powers-celestial-phenomenon-steve/|url-status=live}}</ref> closer to the [[equator]] than typical auroras.<ref>{{cite web|url=https://www.theguardian.com/science/shortcuts/2018/mar/19/steve-mystery-purple-aura-rivals-northern-lights-alberta-canada-nasa|title='Steve': the mystery purple aurora that rivals the northern lights|last=Saner|first=Emine|date=19 March 2018|website=The Guardian|language=en|access-date=22 March 2018|archive-date=22 March 2018|archive-url=https://web.archive.org/web/20180322013359/https://www.theguardian.com/science/shortcuts/2018/mar/19/steve-mystery-purple-aura-rivals-northern-lights-alberta-canada-nasa|url-status=live}}</ref> When the picket-fence aurora appears with STEVE, it is below.<ref name="nishimura-2019" />