A much bigger problem is how to photograph this volcanic phenomena. I find the most important skill in photographing landscapes is figuring out the best time to shoot them. The angle and quality of light is everything! I chose to do a time exposure at dusk when there was still a little light in the sky so that the glow would not be in too much contrast to an unlit surrounding landscape. I always try to keep my ISO as low as possible (200) to preserve quality. Since I had brought a tripod this was made possible. Considering the distance and wide focal length, I did not need to worry about my depth of field so I chose a wide open lens (2.8). My exposure time was 121 seconds. I was shooting with a Nikon D4 and using the wonderful long exposure noise reduction setting.