I took this looking across Walker Lake while camped at 20 Mile Beach in Nevada. I could not duplicate the image despite many tries. Since taking it, I've asked a few folks about what was captured. Most don't have any idea, one said I might have moved while taking the picture. Since there is no blur, I've disregarded that comment. Hopefully, you will be able to provide a reasonable answer.

Canon 7D MkII, 100-400mm at 150mm; f5 for 1.3 sec; ISO 800

Converted from RAW to jpeg; cropped to enlarge.