The head of the institute, Akis Tselentis, told state news agency ANA-MPA the temblor was an aftershock from the magnitude 5.1 earthquake on July 19 and there is no reason for concern. Greece lies in an earthquake-prone part of the Mediterranean and magnitude 4 quakes are a regular occurrence.
Greece: Magnitude 4.2 aftershock strikes close to Athens
ATHENS, Greece (AP) — A magnitude 4.2 earthquake has struck not far from Athens and seismologists say it was an aftershock from a stronger quake more than a week ago. The Athens Institute of Geodynamics said Sunday's earthquake happened at 7:09 p.m. and was centered 21 kilometers (13 miles) northwest of the Greek capital. It was felt throughout the Athens area but there have been no reports of damage.