An earthquake of 4.5 on the Richter scale was registered on May 22 near the town of Sandanski in south-western Bulgaria, close to the Greek border, according to preliminary data from the European Mediterranean Seismological Centre.
The quake occurred at 11.58am local time, or 8.58am UTC, with the epicentre reported at five km north of Sandanski and 121km south of Bulgarian capital Sofia, where it was also felt. The depth of the quake was at five km, according to the EMSC.
An aftershock measuring 3.2 on the Richter scale was recorded in the same area at about 12.10pm, EMSC data showed.
There were no immediate reports of injuries or damage.
The quake would have also been felt in the mining town of Pernik, which was hit hard by a 5.8 earthquake on May 22 2012. That quake caused no deaths or serious injuries, but saw extensive damage, with several thousand households granted government compensation for the damage.
(Photo: Myles Davidson)