A strong earthquake shook southern Greece on Friday and was felt as far as Athens but there were no immediate reports of casualties or serious damage. The Athens Geodynamic Institute also put the quake, which occurred at 0645 local time (2345 ET Thursday), at 5.7 magnitude and said it was undersea. Most cause no serious damage, but a 5.9 magnitude quake near Athens in 1999 killed 143 people.