The sun produced an unexpected burst of activity on April 23rd when an enormous prominence rose over the northeastern limb and erupted. SOHO recorded the blast from beginning to end with a series of high-cadence UV snapshots.

The complex explosion produced not one but two billion-ton coronal mass ejections (CMEs): movie. An impact from such a double-CME would almost surely spark magnetic storms around the poles of Earth, but it is not heading in our direction. The chance of auroras remains low.

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