Geodynamic Institute of the Athens Observatory

A weak earthquake of magnitude 3.7 on the Richter scale, according to the automatic solution of the European-Mediterranean Seismological Institute (EMSC), occurred on Monday morning at 07:23 in the South Cretan Sea.

The exact epicenter of the tremor was located 50 km south-southeast of Heraklion, Crete.

Inspectors said on Monday that 144 of the 268 buildings that have been so far assessed in the wake of a 6.4 magnitude quake on the Ionian island of Zakynthos have been declared unsafe. Another 124 were declared temporarily unsafe.

An undersea quake measuring 4.4 on the Richter scale occurred in the Ionian Sea shortly before 5 a.m. on Monday, the latest in a series of temblors to shake the area.

According to the Geodynamic Institute of the Athens Observatory, the quake occurred at 4.44 a.m. some 70 kilometers southwest of Zakynthos.