NEW : A strong earthquake jolted the southern Philippines on Thursday , the U.S. Geological Survey said . No immediate reports of injuries from the 6.2-magnitude quake . Quake struck 680 miles ( some 1,100 km ) south of Philippines , the CNN says . Manila is located on the quake-prone `` Ring of Fire '' Pacific Tsunami Warning Center did not issue a tsunami warning .
NEW : No immediate reports of injuries from the 6.2-magnitude quake . Quake struck 680 miles ( some 1,100 km ) south of Philippines , the CNN says . Manila is located on the quake-prone `` Ring of Fire '' Pacific Tsunami Warning Center did not issue a tsunami warning .