A powerful 7.6- magnitude earthquake has hit the waters off the coast of Honduras, triggering tsunami threats and advisories for nearby Caribbean shores. <br/><br/>According to the US Geological Survey, the quake struck at 0820 IST late yesterday and its epicenter was located some 44 kilometers east of Great Swan Island. <br/><br/>However, there were no immediate reports of damage or injuries. Honduran President Juan Orlando Hernandez said authorities had activated the country's emergency system, but urged people to "please remain calm". The US National Weather Pacific Tsunami Warning Center said based on the preliminary earthquake parameters,<br/><br/>hazardous tsunami waves are possible for coasts located within 1,000 kilometers of the earthquake epicenter. Tsunami advisories, which are a level below "warnings", were issued for Puerto Rico and the Virgin Islands. Cuba, Mexico, Honduras, Belize and Jamaica meanwhile were issued "threat" warnings of waves between 0.3 to one meter high.