NLN Aurora Briefs – March 3, 2015

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Solar flare in 304 wavelength
M3.44 Flare from AR2290 prominence caught on AIA 304

The above prominence was related to the third of today’s four M-class solar flares originating from Active Region 2290. This region became very active today producing 17 different flares. Initial analysis of the data show that at least a couple of these flares produced CMEs. However, due to the location of the region on the western limb, any Earth directed component of any of the CMEs is unlikely. We’ll just have to enjoy the views that come in off the SDO satellites.

As predicted, geomagnetic storming increased again in the first half of March 2nd. Storming of KP=5 (G1) was measured for several hours. For a brief period the wing-KP model was estimating KP to be 6.33. It is likely 6.33 was an overestimate – more on that in a future blog post – but it was enough to please lots of lucky Aurora viewers across northern North America.

Did you know you can see the growth and decay profile of solar flares on NLN? Here’s the link to today’s M3.77 flare in the above picture. You can navigate to the next and previous M-class flares from there. When was the last time we saw an M-class flare(hint: it’s been longer than normal fro this part of the solar cycle)?

Today’s featured tweet: another look at the M3.77 flare in LASCO C2 via Helioviewer and by @epicCosmos

Happy Hunting

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