The Expanding Auroral Oval
This figure shows a series of images of the auroral oval as it expands over the course of about an hour in response to a geomagnetic storm.
This is an animation of the auroral oval expanding.
This image shows the expanding auroral oval.
Click on image for full size version (55K GIF)
Image courtesy of L. Frank
What is a Magnetosphere?
Go to the Space Weather site to find out more about the aurora
Last modified December 2, 1997 by the Windows Team
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