Actually no, it was the "Tycho Magnetic Anomaly 1", which was underneath the crater called Tycho, which is the brightest crater on this side of the Moon. It has very large "rays" of lighter ejecta all around it, which makes it perfect for drawing attention to something inside the crater. Once the curious ape descendants decide to poke around the big shiny, they're bound to discover that the magnetic field there is screwing up their toys. But Tycho is definitely a near-side area.