The quake was felt in Bucharest and as far away as Ukraine and Bulgaria. It occurred in the tremor-prone region of Vrancea.
A 5.8 magnitude earthquake shook central Romania in the early hours of Sunday.
The National Earth Physics Institute says the tremor, which lasted for several seconds, occurred in the quake-prone region of Vrancea in the east of the country. It struck at a depth of 150 kilometers (94 miles). The nearest town was Comandau, near the city of Brasov.
The earthquake could be felt as far away as the capital, Bucharest, 150 kilometers south of the epicenter. It could also be felt in parts of Ukraine, Moldova and Bulgaria.
There were no immediate reports of damage or injuries.
es/amp (AP, dpa)