October 2, 2013 3 Comments
Some great looking Aurora for Michigan Tuesday night following a Coronal Mass Ejection from the Sun on Sunday. It finally made its way to Earth’s magnetic field! And boy was it a strong impact.
I first learned about the ejection from Tamitha Skov on twitter. She posts plenty of great space weather updates, and also the science behind the sun and its Earth effects. Upon hearing that Lights in North America were possible via the NWS Space Weather Prediction Center’s Facebook Page, I thought I would at least probe the skies of Michigan later.
Around midnight things started to ramp up on the Kp Index, a rough indicator of aurora visibility. Its dark, and parking along side a rural road is a little dangerous due to unsuspecting travelers, so I decided to start small and bike across the street to an apartment complex that opened to a large field. I’m still south of some intense light pollution, so was not expecting much, but just wanted a hint.
My tripod was missing in action, so this complicated things greatly. Taking photos of the aurora requires the camera to be very steady while the picture, sometimes 8-20 seconds in length, is being taken. So I just relied on setting the camera on the ground and placing some items under the lens to prop it a bit. Turns out on my first shot I got what I was looking for. The hint. Circled is just a slight green band of aurora popping up between two patches of loud light pollution. So lets trouble shoot; northern lights = check, tripod work around = check, no light pollution = no check.
Having to get up at 7am the next morning was also a negative factor, if these lights took off, I could be up for awhile.
Dew was forming on my car windows, a quick roll down of the windows and a wiper swipe and things were clear. I traveled to McDonald Park along Pickard Rd. which is west of town, and north of any obstructive light pollution.
When I got out of the car, I saw the tell-tale signs of an ongoing Northern Lights performance. What you see with your eyes is different than what the camera picks up. Aurora could look different in high latitudes then what I saw last night, but if I could describe it, it looked like an elevated fog. You could tell it was there because the sky above looked similar to sky right along the horizon, but in between… was the Lights. I modified a photo from early on to represent what I could see myself.
The camera tells a more colorful and stunning story. By having the shutter open and the camera taking a picture for 20 or so seconds, any lights in the dark sky are more pronounced. So stars are plainly visible, as well as the aurora colors. This was a few minutes after the above photo:
The sky lit up with activity right as I settled down. I mean I could actually see some vertical elements moving across the horizon to my naked eye. I teared up a bit. This was amazing. You see countless photos of the Northern Lights online(guilty here), but seeing it in the flesh, is just spine tingling. Red is apparently more rare as it is Oxygen reacting with the disturbance, and this take a little longer to process, may explain the abundance of green, but little sprites of red.
If you’re interested in Aurora spotting, there are a few resources to keep an eye on. Things may get confusing along the way, but stick to sources that blend public viewing and educational. You’ll learn a lot fast!
- Search for twitter profiles that either automatically update with Kp indices, or a passionate forecaster/scientist. I follow @Aurora_Alerts and @TamithaSkov primarily.
- Obligatory NWS Space Weather Prediction Center site
- Satellite Environment Plot, great for at-a-glance comparisons and learning some lingo. Kp values are given in the bottom bar graph, in Michigan, look for Kp’s of 6 or greater.
- Polar Orbiting Satellite estimates and test products, watch, test, and learn what signs may mean aurora in your neck of the woods.
Be patient, and be ready to be disappointed. Computer models and predictions can point to an event, but the light strength just may not cooperate. At the same time, the opposite can happen, and you may get a treat! Happy hunting!