GEOMAGNETIC STORM IN PROGRESS: A G1-class geomagnetic storm is underway on Dec. 17th as Earth moves into a stream of solar wind. The gaseous material is flowing faster than 600 km/s from a hole in the sun's atmosphere. G1-class storms are relatively minor and have little effect on power grids and satellites. However, they can confuse migratory animals that navigate using magnetism at high latitudes and, moreover, may spark bright auroras around the Arctic Circle. Tonight's nearly new Moon will provide a dark backdrop for Northern Lights. Visit Spaceweather.com for more information and updates.
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