MANILA-Two strong earthquakes jolted the southern Philippines on Tuesday, authorities said, with the second damaging buildings and forcing the evacuation of hundreds of villagers from their homes.  A 6.0-magnitude quake struck at about 2:00 pm (0600 GMT), a few kilometres from Maragusan municipality in the mountainous gold-mining province of Davao de Oro on Mindanao island, the US Geological Survey said. Local authorities said there were no reports of casualties or significant damage.  But a shallower second quake, measuring 5.6 magnitude, hit nearly three hours later in the neighbouring municipality of New Bataan, triggering the collapse of some houses.