A seismic tremor of magnitude 4.4 on the Richter scale occurred at 00:27 Greek time, as announced by the Geodynamic Institute of the National Observatory of Athens, on behalf of the four constituents of the Unified National Seismological Network.

A moderate earthquake measuring 5.7 on the Richter scale shook the island of Nisyros at 1.14 am on Tuesday. The tremor occured 24 km south-southwest of Nisyros, the Dodecanese, the Geodynamics Institute of National Observatory of Athens said.

The Euro-Mediterranean Seismological Institute (EMSC) estimated that the quake had a magnitude of 5.9 and occurred at a small focal depth of about 2 km.

It is not yet known if there were any casualties or damage from the quake.

A moderate earthquake measuring 5.2 on the Richter scale shook the area of Elassona at 14:57 on Friday. The quake's epicenter was located 16 km west-southwest of Elassona and its focal depth was 8.5 km, the Geodynamics Institute of National Observatory of Athens said.