Aurora over Maine . ... Credit Copyright: Jeremy P. Gray 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. ... Since another CME plasma cloud is currently approaching the Earth, tonight offers another good chance to see an impressive auroral display . ... NASA Web Site Statements, Warnings, and Disclaimers . ...