HAVANA — A 6.8-magnitude earthquake shook eastern Cuba on Sunday, after weeks of hurricanes and blackouts that have left many on the island reeling.

The epicenter of the quake was about 25 miles south of Bartolomé Masó, Cuba, according to a report by the United States Geological Survey.

The rumbling was felt across the eastern stretch of Cuba, including in bigger cities like Santiago de Cuba. There were no immediate reports of damage or injuries.

Residents in Santiago, Cuba’s second…