Could it be a metorite hitting?? Or something volcanic (is the moon volcanically active? I don't think so..)
Heaps of pics on site...
The August, 2003 issue of Electric Space Craft, a scientific journal, contains an amazing series of images taken from NASA footage included in the TV
program, NOVA: To the Moon. The significance of the images has only recently been noticed.
As Apollo 8 orbited 70 miles above the lunar surface, with Earth in the background, it filmed the ground below. At one point, a small, black object,
tall and cylindrical, appears jutting from the moon. Just as the camera is about to pass by, the strange object clearly releases a jet-like cloud.
It looks like a smokestack ejecting a puff of smoke. The cloud drifts to the right and then dissipates. Though the black object appears small on the
screen, it must be thousands of feet tall if the footage was taken from such a high altitude.