Image:Aurora as seen by IMAGE.PNG

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http://pluto.space.swri.edu/IMAGE/FUV_images2.html

The six images above show the northern aurora at various stages in its development as it was observed with the Far Ultraviolet (FUV) Imaging System during a major geomagnetic storm that occurred on July 15-16. The images were obtained when the spacecraft was near apogee (7.2 Earth radii) and was looking down onto the northern polar region. The Sun is to the lower right. The storm, which peaked between 2200 UT on July 15 and 0200 UT on July 16 with a Dst index as low as -295 nT (according to the World Data Center in Kyoto), was classified by NOAA's Space Environment Center as a G5 or "extreme" storm. The July 15-16 storm was triggered by a fast coronal mass ejection (CME) that hit the Earth's magnetosphere around 14:40 UT on Saturday, July 15. The CME erupted from the Sun on Friday, July 14, and and was associated with a powerful solar flare. The CME traveled toward Earth at a speed of three million miles per hour, according to the Space Environment Center. The auroral emissions observed with the FUV/WIC are from molecular nitrogen that is excited by precipitating electrons.

MPEG movie of the July 15 aurora (1.5 Mb)

FUV images and movie of June 8 aurora

Photo and movie credit:S. Mende and H. Frey, Space Sciences Laboratory, University of California, Berkeley; Randy Gladstone, Southwest Research Institute

This file is in the public domain because it was created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (NASA copyright policy page or JPL Image Use Policy) Warnings: Use of NASA logos, insignia and emblems are restricted per US law 14 CFR 1221. The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not in the public domain. Materials from the Hubble Space Telescope may be copyrighted if they do not explicitly come from the STScI. [1] All materials created by the SOHO probe are copyrighted and require permission for commercial non-educational use. [2] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3]

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