A strong earthquake shook East and West Germany Monday, and East German media reported damage and injuries along the border. The earthquake also was felt in parts of Switzerland and Czechoslovakia, officials said. West German authorities said the quake registered 5.7 on the Richter scale. East Germany's ADN news agency, which gave the magnitude as 5.5, said the quake was triggered by a huge explosion in an underground mine. This could not immediately be confirmed. Chimneys fell in the East German border village of Vacha, and several people were injured there, the state-run agency said. It did not give casualty figures.