The United States Geological Survey reported a strong 6.0 magnitude which struck off the northwest coast of Puerto Rico late yesterday. No casualties or damage have been reported.<br />''<br />''The quake struck 62km northwest of San Antonio at nearly midnight at a depth of 10km. San Antonio is home to Rafael Hernandez Airport, a key air link to the mainland US.<br />''<span style="color: #222222;"><br />''In 2010 nearby Haiti was struck by a devastating 7.0 magnitude earthquake that killed more than two lakh people and crippled the nation's infrastructure.</span><br />