The glow now retreated and was from a house over the ridge on the left side of the image.
Exposure Date: 2016:08:02 12:56:18;
Make: Canon;
Model: Canon EOS 5D Mark III;
ExposureTime: 1/50 s;
FNumber: f/6;
ISOSpeedRatings: 1000;
ExposureProgram: Manual;
ExposureBiasValue: 0/1;
MeteringMode: Spot;
Flash: Flash did not fire, compulsory flash mode;
FocalLength: 28 mm;
Software: Adobe Photoshop CS5 Windows;