This image shows the expanding auroral oval.
Click on image for full size
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.
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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....more