Mystery Solved

The following info comes from NASA's website.

[During a lunar eclipse] our planet is big enough by a factor of three to block the entire sun but, curiously, this doesn't cause complete darkness. Rays of sunlight bend around the edge of Earth, filtering through the atmosphere. As seen from the moon, the edge of Earth lights up like a sunset-red ring of fire. Stuck on Earth, we can't see the ring of fire, but we can see the red glow it produces on the moon. Rising moons are often reddened by clouds or pollution, but this moon [though high in the sky] will be the deep, extraordinary red only seen during a lunar eclipse.