Highly Anticipated Aurora

Posted by lwpetersen | October 10, 2014 | aurora borealis, photo-blog
There was a strong band of aurora showing for a while when we arrived at US Creek Road off the Steese Highway. The threat of clouds was growing stronger. We waited as the northern lights ebbed and flowed. It was a gorgeous interplay with the clouds.

Aurora band from US Creek Road overlooking the White Mountains.

My mother and father in law have been to Fairbanks four times, including two very cold winter visits. To our dismay, over twenty nights in Alaska they had yet to see the aurora. Statistically, tourists to the area have a one-in-three chance to see the lights on a clear night. Since the northern lights are often more prevalent around the equinox, they made a late summer trip to town in hopes of seeing them. Even I succumb to ecological fallacy – they must see them soon.

On September 9th a large (M4) class solar flare preceded a long Coronal Mass Ejection (CME). Events such as these send out fast streams of electromagnetic radiation along with protons and electrons that can, upon impacting the earth’s magnetic field spark fantastic auroral displays. The good news was that this one was partially directed toward earth. The weather forecast over the next few days looked like we might have some clear evening skies. The spaceweather and the weather were both looking good.

A couple of nights later we drove out to the White Mountains, the car loaded with blankets for potential late-night viewing. There’s an overlook on US Creek Road about 50 miles out on the Steese Highway that seemed like it would be a great place to watch. It was cloudier than we had hoped, but there was still sky visible.

Finally! After pulling over at the top of a ridge there was a green band stretching across the sky. It was nothing spectacular, but it was aurora, and they saw it. We stayed for a while, watching as the band oscillated in intensity, never really deterring from its path. A few times it was even bright enough to be seen against the moon. Even though it wasn’t the show I was hoping for, the interplay between the aurora and the moonlit clouds was breathtaking.

There were times that the aurora was nearly as bright as the moon.

Aurora against the bright moon and clouds

The display deteriorated around midnight and I don’t pull all-nighters anymore. It was time to drive home. We all packed back into the car and headed west. We didn’t get far though. We could see the display as it erupted across the sky. I pulled over just outside of Chatanika.

While driving back to Fairbanks from the White Mountains we saw the sky erupt from within the car. With the corona right overhead I pulled over as soon as possible near Chatanika and just caught the tail end of it.

Auroral corona overhead near Chatanika

After the brilliant coronal display, the aurora faded and diffused out across more of the sky. Some clouds in the sky added some nice texture, and the autumn colors were also nice.

After the brilliant coronal display, the aurora faded and diffused out across more of the sky. Some clouds in the sky added some nice texture, and the autumn colors were also nice.

It fizzled again. The strong corona, diverging rays overhead, faded into a diffusely green sky. We tried to get home again, this time barely making it 10 miles before needing to make another stop near Cleary summit. This time there was a strong band that lasted about half an hour periodically breaking off into smaller bands. There were occasional short lived coronas and some diffuse pulsating aurora that wasn’t as easy to see.

Northern Lights near Cleary summit along the Steese Highway.

Northern lights from the Steese Highway near Cleary Summit.

We made it home shortly before 3 am. A wonderful night and a successful check on a bucket list.

I took quite a few more photos – here are the links to them on my photo page (the morning of the 12 is the better display):
Night of September 11, 2014
Morning of September 12, 2014

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