A shallow magnitude-6.5 earthquake struck off the coast of the French overseas territory of Guadeloupe, US seismologists said, with no damages or injuries immediately reported by authorities.
The US Geological Survey said the epicentre of the quake hit around 160 kilometres (100 miles) east of the Caribbean island at a depth of nine kilometres
Authorities issued a brief tsunami warning after the initial tremor, which has been followed by several strong aftershocks.