Geomagnetic Storm Alert
High-latitude sky watchers should be alert for auroras. During the early hours of Dec. 28th, the sun's magnetic field near Earth tipped south, opening a crack in Earth's magnetosphere. Solar wind poured and sparked a G1-class (Kp=5) geomagnetic storm. Observers are reporting ground currents
and intensifying Northern Lights in Scandinavia.
More auroras are in the offing. A solar wind stream flowing from a coronal hole is due to hit Earth's magnetic field on Jan. 2nd. The impact could produce the first geomagnetic storm of the New Year. High-latitude sky watchers should be alert for auroras.
Dr. Tony Phillips / Holly Zell
NASA's Goddard Space Flight Center