Two powerful earthquakes rocked southern Cuba in quick succession on Sunday, US geologists said, as authorities said no tsunami alert was issued and no deaths immediately reported. The US Geological Survey put the second, more powerful tremor at a magnitude of 6.8 and 14.6 miles (23.5 kilometers) deep, some 25 miles off the coast of Bartolome Maso, in southern Granma province. It came just an hour after a first tremor, which the USGS put at a magnitude of 5.9, with the epicenter some nine miles beneath the ocean roughly 22 miles off Bartolome Maso. The state-run newspaper Granma said no deaths had been immediately reported, but that the quake had been felt throughout the Caribbean island nation. "Here people quickly took to the streets because the ground moved very strongly," Andres Perez, a 65-year-old retiree who lives in downtown Santiago de Cuba, told AFP via telephone of the first quake. "It felt very strong really, my wife is a bundle of nerves," he add