An earthquake measuring 5.1 on the Richter scale shook central Spain on Sunday but without causing injuries or significant damage, DPA quoted the country's National Geographic Institute as saying. The quake however caused cracks to appear in walls and dislodged plaster from buildings. Around 10 aftershocks were reported. The tremor was felt across Spain, RNE state radio said. The epicentre of the quake was close to the town of Pedro Munoz in the province of Ciudad Real, officials said. Many of the town's 10,000 residents fled their homes when the quake struck, some still in their nightclothes. "We can't remember the last time there was an earthquake this strong here," said Mayor Angel Exojo. "The earthquake lasted just a few seconds," one local resident said. "The furniture was vibrating and things fell from the shelves in the living room onto the floor."