A strong earthquake struck near the Aleutian Islands on Thursday, AP quoted the U.S. Geological Survey as saying. The USGS said the quake, with a preliminary magnitude of 6.6, was located 40 miles (64 kilometers) west of Adak, Alaska at a depth of 6.2 miles (10 kilometers). It gave the location as 1,225 west south west of Anchorage in the Andreanof Islands. The quake struck at 4:33 p.m. local time (0033 GMT Friday). The report on the USGS Web site made no mention of damages or injuries. Earthquakes with a magnitude in excess of 6.0 are capable of causing severe damage.