We shut the truck off and stepped out into a cool night and a light breeze which shocked the face. My friend Ross and I were after auroras, and we planned to summit Angel Rocks in the Chena Recreation Area to spend the night and watch it. The sun was low in the sky as we started up the 1.6 miles to the summit of Angel Rocks. By the time we had reached the top of the ~1000 foot climb, the breeze funneling up the canyon below had stopped, and the sun melted into the horizon leaving a blue and gold light which lingered for hours. With short days in Fairbanks, it was hard to forget it was only about 5:30! There was a lot of night to go.
I was delighted to find a cave at the top of Angel Rocks. It was two ended and had large crevasses in the ceiling to view the stars. In the middle I could stand all the way up, and the larger south facing entrance was almost 8 feet tall. I’m just speculating, but I think this cave was formed as a magma bubble. The geology of the summit was far different than any geology I had seen in the Fairbanks region. In contrast to the normal scree slopes and shale of the region, the exposed rocks were granite and had forms which suggested bubbling magma. The rock outcrop where we stood was very unique!
In a collision of natural phenomenons, the Leonid meteor shower lined up with an incredible aurora display. Each year the Leonid meteor shower peaks around the 17th or 18th of November. Named after Leo, the constellation that they seem to radiate from. The Leonids Meteor Shower is actually small pieces of the comet Tempel-Tuttle which burn up as they enter our atmosphere. Incredibly, the size of the majority of particles range from grains of sand to pea-size.The largest meteors are often only marble sized pieces of comet. That’s a lot of light from a particle the size of your favorite shooter!! These particles burn up because the air in front of them is compressed and heated which scorches the meteor. That’s way different than I was ever taught (i.e. they burn up because of friction with the air). How fast do they have to be moving to build up that air pressure? The particles can enter the upper atmosphere at 160,000 mph! The Leonids were 24 hours from peak activity, and throughout the night they dazzled us with frequent and long tails.
As the sun set the aurora immediately started up. In fact, with an ‘official’ start time of 5:30 PM it was the earliest I have ever seen the aurora appear! It certainly seemed to be a good omen for the night to come.
Over the course of the night we enjoyed three bursts of incredible aurora. From 5:30 – 7:00 PM, 9:30 – 11:30 PM and from 5:30 – 6:30 AM. Although sleeping in the cave would have been VERY awesome, the night was so warm that I was content to roll out my sleeping bag under the stars and slumber around midnight. I awoke at 5:30 AM not minutes before an incredible corona dominated the overhead skies (captured in timelapse!). I think my aurora sense was tingling and telling me to wake up!
For the second night in a row the aurora put on an unforgettable show. I think the aurora are like fingerprints. They may look alike, but none are ever the same! For its immense status in the sky, I had never seen aurora that stayed as intense as this one. At times you could have read a book by it, and all through the night the sky was filled with incredible beauty and auroral ballerinas. In Minnesotan, it was “oofda good!”.