Category Archives: NLN Aurora Brief

NLN Aurora Briefs – January 31, 2015

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SWPC has extended the G1 Geomagnetic Storm watch through February 1. Earth’s magnetosphere continues to be under the influence of high speed solar wind from the southern coronal hole. High latitude aurora are likely to continue and there’s a chance for aurora at upper mid-latitudes.

Wind speed to Aurora alert lead times table
Solar wind speed determines how much lead time you have to see aurora

We posted the above table to the Northern Lights Now Twitter accounts (@northlightalert) earlier today. When the solar wind is strong there is less time between when a solar storm hits the ACE satellite and when it hits Earth. Thus, strong wind (like in the current storm) means less lead time between when a KP alert is announced and when the Aurora displays. So be ready.

You can track the current KP on our live KP page.

Today’s Featured Tweet: The first aurora image we saw from tonight’s storm.

NLN Aurora Briefs – January 30, 2015

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The predicted increase in solar wind speed that prompted the ongoing G1 Geomagnetic Storm watch has started. Winds speeds are now around 410km/s. Late on the 29th, a period of higher density and negatively tilted Bz increased the KP to 4.33. As wind speeds continue to increase over the next 24 hours, the magnetosphere will be more reactive to small disturbances, and higher KP values are possible. One note: with higher wind speed, there will be less time between detection at the ACE satellite and resulting Aurora on Earth, be prepared for as little as 45 minutes of warning.

Solar activity is increasing as well. There are currently 4 Beta-gamma Active Regions (ARs 2268, 2271, 2275 and 2277). 2268 and 2271 are growing in complexity and spot count – there could be a delta region soon.

Featured tweet:

NLN Aurora Briefs – January 29, 2015

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SWPC issued a Geomagnetic Storm Watch today for January 30th and January 31st. Potential Aurora activity from the Southern Hemisphere Coronal hole may happen any time between 7:00 PM Thursday night and 7:00pm Saturday evening Eastern time. The magnetosphere will be highly reactive to any potential disturbances – so any Earth-directed eruptions will increase aurora potential.

Two M-class flares, 15012802 and 15012806, erupted from AR 2268 today. Both were impulsive and did not produce CMEs.

Here are our top three tweets from January 28, 2015:

Happy Hunting