Fig 1. Olympus Mons seen from the North-East (uncredited computer generated image, altitude exaggerated) showing the immense ~180 km wide landslide. The escarpment at bottom centre is approximately 8 km high and runs at an angle of between 10 and 30 degrees. The expedition base camp is marked by a white star, the Graf's cable lift is marked in yellow and the paths taken by the eight rovers are outlined in green. From left, they are referred to as Rover A, Rover B etc. The blue dots indicate the positions of the deployed seismometers. The point where Rover A was lost is marked with a red dot.