(Corrects time in second paragraph to 9 am not pm)
SHANGHAI, May 20 (Reuters) - A magnitude 5.6.earthquake struck near the centre of the Philippine archipelago on Saturday, but the Philvolcs seismology agency said the tremor was too deep to raise fears of casualties or damage.
The quake struck shortly after 9 a.m. (0100 GMT). The China Earthquake Networks Center (CENC) estimated its depth at 540 km (336 miles) under the Bohol Sea, 99 km (62 miles) south of Cebu City. CENC had estimated its magnitude at 6.0. (Reporting by John Ruwitch; Editing by Simon Cameron-Moore)
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