Panama, Safar 16, 1436, Dec 8, 2014, SPA -- A 6.6 magnitude earthquake struck 23 km (14 miles) southwest of Panama's coastal city of David at 0854 GMT on Monday, Reuters quoted the United States Geological Survey (USGS) as saying. The report put the depth of the quake at 10 km. --SPA 12:17 LOCAL TIME 09:17 GMT www.spa.gov.sa/w