|Few auroras show this level of detail.
Above, a standard digital camera captured a particularly active and colorful
auroral corona that occurred last week above
With a shape reminiscent of a
spectacular aurora had an unusually high degree of
The vivid green and purple
auroral colors are caused by high atmospheric
reacting to a burst of incoming
Many photogenic auroras have been triggered from a
stream that recently passed the Earth.
The auroras were unexpected because the initiating Sun has been
unusually quiet of late.
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