Saturday, September 6, 2014

Tonight's Sky for September 6: Be Alert for Aurora


On September 2, the Sun unleashed an unusually slow moving coronal mass ejection (CME). Now, 4 days later, that CME is finally set to impact the Earth's magnetic field. While now overly powerful, the coming of aurora is notoriously unpredictable, with some much-hyped CMEs spawning no aurora at all and other, weaker blasts spawning spectacular displays. Bottom line: be alert for aurora tonight, especially if you live in Northern latitudes.

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