A 4.6-magnitude earthquake struck Romania's Vrancea seismic zone on Sunday, with no reports of casualties, injuries or major material damage so far.
According to the National Institute for Earth Physics, the earthquakes occurred at 10:12 a.m. local time (0712 GMT), at a depth of 147 km, in mountain areas of central-eastern county of Covasna, some 150 km northeast of the capital city of Bucharest.
Another fifteen earthquakes occurred since August in the Vrancea seismic region, with magnitudes between 2.5 and 3.9 degrees on Richter scale.
The strongest earthquake this year occurred on March 29 and measured 5 on Richter scale.
The Vrancea seismic zone, including counties of Vrancea and Buzau, as well as surrounding mountains, is one of the most active seismic areas in Europe. It is known for its intermediate-depth (70-200 km) earthquakes, which can reach a magnitude of 7.0 to 7.8.
In March 1977, a 7.6-magnitude earthquake killed 1,600 people in Romania and damaged 8,500 buildings.