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Sunspot Creates a Stir; Auroras Likely Beyond the winter chill that many of us have to contend with, there's also stormy space weather in the forecast for the week. A fast-growing sunspot group designated AR 10720 has been causing a stir as it sent a series of coronal mass ejections, or CMEs, hurtling through space at breakneck speed. The large blast on Monday was classified as X-3, with "X" being the most powerful designation, followed by the degree of severity. Scientists expect the charged radiation from that event to reach Earth Tuesday night or Wednesday.
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