The Watchers - Time-lapse movie of the corona aurora that appeared over UAF ski trail, Fairbanks, Alaska after strong CME hit Earth’s magnetic field. Red aurora was also captured. (1:54 - 2:32am AKST, March 17, 2013)
Corona aurora is a shape of aurora in which rays converge onto a point. This indicates the overhead position of the magnetic field along which the observer is located. For quick information on other forms and types of auroras, their spatial structure, temporal behavior and more click here.
Captured by Taro Nakai, a researcher of micrometeorology. Camera: Nikon D90 Lens: SIGMA 10mm F2.8 EX DC Fisheye HSM…Information: 10mm, F/2.8, Manual, 2.5 sec, 0EV, ISO3200, Interval: 3 sec, Movie: 10fps.
Thanks to: http://aworldchaos.wordpress.com