G2 Storm Watch posted for Sept 11

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Northern Lights Now – SWPC has posted a G2 storm watch for potential aurora on September 11 with follow-on activity on Sept 12 that may reach G1 storm levels. The image below shows the periods of time to expect the strongest activity. The Red areas should have G2 storming while the orange areas are predicted to have G1 storming.

NLN AuroraCast shows 4 periods over the next two days of G1 or higher activity
NLN AuroraCast shows 4 periods over the next two days of G1 or higher activity

This activity is the result of high speed wind from the second of a pair of coronal holes providing a 1-2 punch. Solar wind speeds reached speeds of 515km/s in the first stream, but the magnetic structure was not favorable to northern lights activity. The second stream, which is already buffeting Earth with wind speeds over 550 km/s is oriented more favorably. Boulder has already registered three periods of G1 storming.

G1 storming has already been recorded at Boulder
G1 storming has already been recorded at Boulder

Happy Hunting

Early September 2018 Aurora Activity

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Northern Lights Now – A pair of coronal holes are increasing the chances for aurora early this season. These coronal holes will bring high speed solar wind and the potential for aurora. Stay tuned

The two coronal holes in this image will give earth a 1-2 punch between Sept 6 and 13. Both holes (the dark areas in the image) are located close to the equator which means their wind streams are likely to impact Earth

Two Coronal holes at center disk on Sept 5, 2019
Two Coronal holes at center disk on Sept 5, 2019

So far, based on STEREO-A data, it looks like the second storm may pack a stronger punch.

Happy Hunting