(AGI) Manila, July 14 - An earthquake measuring 6.4 degrees onthe Richter scale rocked the southern Philippines on Monday. Nocasualties or damage were reported and there was no tsunamiwarning. The U.S. Geological Survey, which records seismicactivities worldwide, located the epicentre not far fromPondaguitan in southern Mindanao at a depth of 22 km. . .