A magnitude 6.3 earthquake shook Nicaragua and northern parts of Costa Rica, there were no clear reports of injuries or distruction.
The earthquake was centered 120 kilometers (75 miles) southeast of Managua, the Nicaraguan capital, accord to the U.S. Geological Survey's National Earthquake Information Center.
It hit at 5:03 a.m. local time (12:03 GMT).
Red Cross and government civil defense officials had no immediate reports of injuries or destruction in Nicaragua.
The movement was light in Managua, where many people slept through the earthquake.
The quake was felt in northern Costa Rica but caused no major damages or injuries there, the AP reports.