abv.jpg GPX Waypoint dataThumbnailsGround Motion Attenuation Study Map - 2002 GPX Waypoint dataThumbnailsGround Motion Attenuation Study Map - 2002 GPX Waypoint dataThumbnailsGround Motion Attenuation Study Map - 2002 GPX Waypoint dataThumbnailsGround Motion Attenuation Study Map - 2002