Explanation:
It has been a good week for auroras. Earlier this month active sunspot region
2158 rotated into view and unleashed a series of flares and plasma ejections
into the Solar System during its journey across the Sun's disk. In particular,
a pair of Coronal Mass Ejections (CMEs) impacted the Earth's magnetosphere
toward the end of last week, creating the most intense geomagnetic storm so far
this year. Although power outages were feared by some, the most dramatic
effects of these impacting plasma clouds were auroras seen as far south as
Wisconsin, USA. In the featured image taken last Friday night, rays and sheets
of multicolored auroras were captured over Acadia National Park, in Maine, USA.
Since another CME plasma cloud is currently approaching the Earth, tonight
offers another good chance to see an impressive auroral display.
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