According to U.S. Geological Survey officials on island, the quake's epicenter was 50 miles north and 62 miles deep in the Pacific Ocean from Guam's capitol city, Agana.
Initial reports indicate only minimal damage to base family housing.
Though power was knocked out when the quake struck, crews restored power to the base within about eight hours. The dining facility and some of the base's underground communications cabling was damaged in the quake. Andersen is home for Pacific Air Forces' 13th Air Force and 36th Air Base Wing. Most recently, the base served as a receiving and staging area for Joint Task Force Pacific Haven. The task force was established in September to facilitate the evacuation of Kurdish nationals from Iraq.