Colors at sunrise

Today I would like to share a photo taken during sunrise on Fuerteventura Island.

Technical details:
Camera: Canon 50D
Lens: Canon 10-22 f/3.5-4.5 USM
Focal length: 24 mm
Aperture: f/11.0
Exposure time: 8 s ("middle" exposure)
ISO: 400
Number of exposures: 5
E.V. Step: 1
Flash used: no
Tripod: no
Filters: ND8 neutral density filter
Technique: manual blending, luminosity masks
Software: Magic Lantern 2.3, Lightroom 5.0, Photoshop CC