April 26, 2012 Auroras
Lake Winnibigoshish at Bena, MN
 |
|---|
| Looking overhead-south some miniature auroras well south of the main band. I've often seen these referred to as proton arcs. |
 |
|---|
| Non-contrast-enhanced version of the same image above. I underexposed the images a little with the camera. |
 |
|---|
| Main band of auroras near the northern horizon. |
 |
|---|
| More proton arc auroras overhead-south. |
 |
|---|
| Clouds move in on the main band. |