Category Archives: Alerts

G1 Aurora Storm Watch Posted For September 27

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Northern Lights Now – The second, larger, coronal hole mentioned in the previous NLN post is now pointed directly towards Earth and has prompted the SWPC to issue a new G1 geomagnetic storm watch for Wednesday September 27.

Transequitorial Coronal Hole is directed toward Earth on September 24, 2017
Transequitorial Coronal Hole is directed toward Earth on September 24, 2017

High speed solar winds are expected to arrive in the second half of Wednesday and May persist through Friday. It would not be surprising to see the storm watch extended another day. G2 storming is also possible during this storm. Stay tuned!

Happy Hunting

CIR and Coronal Hole Bring Quick Burst of Aurora to Northern Europe Sept 14, 2017

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Northern Lights Now – The expected G1/G2 storming from the coronal hole pointed towards Earth on Sept 11 arrived late on Sept 13. It induced a period of fast solar wind, strong Bt and G2 storming. The timing was good for our aurora hunting followers in Northern Europe who had clear skies.

Boulder Recorded Planetary K shows two periods of G2 storming in last 15 hours.
Boulder Recorded Planetary K shows two periods of G2 storming in last 15 hours.

At the onset of the storm, Bz was strongly (-15 to -18 nT) south for over half an hour at the beginning of the storm, which set up Earth’s magnetosphere to be highly activated. This means that any additional strong wind, high density, or prolonged negative Bz can quickly jump the KP back into G1/G2 range.

Bz and Bt are strong and favorable at the onset of the storm.
Bz and Bt are strong and favorable at the onset of the storm.

Here are a couple Tweets share with NLN from tonight’s storming

From the Nidderdale in northern Yorks by @HudsonWeather

From Christopher Suarez in Iceland

It is still possible that there could be additional storming. Keep your eyes on the Solar Wind Data. If there is a prolonged people (more than 45 mins or so) of negative Bz, there could be another round of storming.

Note: The current storm is likely the last for a while. There are now active regions that pose M or X class flare threats on the Sun and the next Coronal hole isn’t expected to reach Earth until late September. Make hay while the Sun shines!

Happy Hunting

G1 Aurora reports from Iceland and Northeast US – Sept 12, 2017

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Northern Lights Now – The arrival of the glancing blow CME from Sunday’s X-Class flare has induced G1 storming conditions across the Northeastern Atlantic region.

G1 storming recorded in the latest 3-hour block by SWP cin Boulder
G1 storming recorded in the latest 3-hour block by SWP cin Boulder

Darlene and Tree Tanner, on vacation on Iceland captured these dancing lights

Also in Iceland Muhammed Kizilkaya captured these:

In New Hampshire Rob Wright got a show for about 40 minutes before is calmed down

Aurora conditions could happen on and off for the rest of tonight and possibly tomorrow night as a CIR and a coronal hole high speed stream arrived.

Happy Hunting!