On the night of August 18 into the morning of August 19, a possible geomagnetic storm could illuminate the skies with Northern Lights across up to 15 U.S. states. Alaska is most likely to witness this phenomenon, followed by states such as Montana, North Dakota, and Minnesota. NOAA anticipates a rise to G1 (Minor) geomagnetic storm levels. The solar wind from a large coronal hole will heighten aurora visibility, with activity expected to peak late at night. Observations can occur as far as 1000 km from the bright aurora under optimal conditions.
There is an increasing possibility during Monday of minor geomagnetic enhancement due to an arriving fast wind, with the possibility of a Coronal Mass Ejection glance Tuesday into Wednesday.
Late on 18 Aug, conditions are likely to increase to active levels followed by G1 (Minor) geomagnetic storm levels on 19 Aug.
Currently, a large coronal hole, or open region in the sun's magnetic field, is facing the Earth.
Aurora can often be observed somewhere on Earth from just after sunset or just before sunrise.
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