A 5.2-magnitude tremor hit northern Greece Sunday evening, authorities said. The earthquake occurred offshore from the Chalkidiki peninsula, about 40 km southeast of Thessaloniki, Greece's second-largest city, the Athens Institute of Geodynamics reported.

The tremor hit at 7:03 pm local (17:03 GMT) at a depth of 15.9 kilometers, the institute said, adding that a 4.2-magnitude quake was recorded four minutes later, along with several smaller tremors.