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Philippine seismological authorities have reported three earthquakes have struck the southern part of the country in succession.
The first quake was recorded around 6 a.m. on Saturday,local time with its epicenter 100 kilometers southwest of the country's city of Cotabato. The 6.9 magnitude quake had a depth of over 600 kilometers.
Two aftershocks measuring 7.2 and 7.1 jolted the sea area near the Mindanao Island. Seismologists say the quakes were too deep to generate waves or create damage. No tsunami warning was issued.
Meanwhile another shallow quake measuring 6 on the Richter scale hit Sumatra island in Indonesia at around 9 a.m. There were no immediate reports of damage or casualties in Indonesia either.