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Credit & Copyright: J. P. Dwyer
Explanation:
Sometimes, near midnight,
auroras suddenly stop. Nobody knows why.
This
nightside gap in
aurora was
confirmed recently by D. Chua
(U. Washington) and colleagues in data from the
Ultraviolet Imager onboard the
Polar spacecraft.
The gap appears from space as a
slight break in a more
full auroral arc
surrounding a magnetic pole of the Earth.
Pictured above are clouds and
auroras occurring last August near
Wildcat Mountain in
Wisconsin.
Tomorrow's picture: A New Storm In The Solar System
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NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Based on Astronomy Picture
Of the Day
Publications with keywords: aurora
Publications with words: aurora
See also:
- APOD: 2024 January 14 Á Dragon Aurora over Iceland
- APOD: 2024 January 3 Á A SAR Arc from New Zealand
- APOD: 2023 December 12 Á Aurora and Milky Way over Norway
- The SAR and the Milky Way
- APOD: 2023 November 5 Á Creature Aurora Over Norway
- APOD: 2023 October 22 Á Ghost Aurora over Canada
- APOD: 2023 April 19 Á Auroral Storm over Lapland