Vaihteeksi kunnon revontulilupaus, josta ei pilvisyyden vuoksi ehkä ole paljon iloa, mutta kumminkin."AURORA ALERT: Sky watchers everywhere should be alert for auroras on Dec. 14th. That's when a coronal mass ejection (CME) hurled into space by yesterday's X3-flare is expected to hit. NOAA forecasters estimate a 55% chance of severe geomagnetic storms.
Solar activity is expected to remain high for days. Sunspot 930, the source of the incoming CME, has an unstable "delta-class" magnetic field that harbors energy for more X-flares." (Spaceweather)
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